JPS6229488B2 - - Google Patents
Info
- Publication number
- JPS6229488B2 JPS6229488B2 JP2244982A JP2244982A JPS6229488B2 JP S6229488 B2 JPS6229488 B2 JP S6229488B2 JP 2244982 A JP2244982 A JP 2244982A JP 2244982 A JP2244982 A JP 2244982A JP S6229488 B2 JPS6229488 B2 JP S6229488B2
- Authority
- JP
- Japan
- Prior art keywords
- adhesion
- annealing
- steel
- adhesion agent
- steel strip
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
- 229910000831 Steel Inorganic materials 0.000 claims description 53
- 239000010959 steel Substances 0.000 claims description 53
- 239000003795 chemical substances by application Substances 0.000 claims description 35
- 238000000034 method Methods 0.000 claims description 27
- 238000000137 annealing Methods 0.000 claims description 24
- 239000000243 solution Substances 0.000 claims description 22
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 12
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 8
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 6
- 239000007864 aqueous solution Substances 0.000 claims description 6
- 239000006185 dispersion Substances 0.000 claims description 6
- 150000004645 aluminates Chemical class 0.000 claims description 5
- 230000003472 neutralizing effect Effects 0.000 claims description 5
- 238000004804 winding Methods 0.000 claims description 5
- 239000003513 alkali Substances 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 2
- 239000011248 coating agent Substances 0.000 description 9
- 238000000576 coating method Methods 0.000 description 9
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 5
- 239000008119 colloidal silica Substances 0.000 description 5
- 238000002845 discoloration Methods 0.000 description 5
- 230000000694 effects Effects 0.000 description 5
- 239000000463 material Substances 0.000 description 5
- 239000000523 sample Substances 0.000 description 5
- 239000007921 spray Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000004140 cleaning Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- LWIHDJKSTIGBAC-UHFFFAOYSA-K tripotassium phosphate Chemical compound [K+].[K+].[K+].[O-]P([O-])([O-])=O LWIHDJKSTIGBAC-UHFFFAOYSA-K 0.000 description 4
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 3
- 238000005097 cold rolling Methods 0.000 description 3
- 239000000084 colloidal system Substances 0.000 description 3
- 230000002265 prevention Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 239000010960 cold rolled steel Substances 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000003112 inhibitor Substances 0.000 description 2
- 238000007747 plating Methods 0.000 description 2
- 229910000160 potassium phosphate Inorganic materials 0.000 description 2
- 235000011009 potassium phosphates Nutrition 0.000 description 2
- KVOIJEARBNBHHP-UHFFFAOYSA-N potassium;oxido(oxo)alumane Chemical compound [K+].[O-][Al]=O KVOIJEARBNBHHP-UHFFFAOYSA-N 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 238000010998 test method Methods 0.000 description 2
- POWFTOSLLWLEBN-UHFFFAOYSA-N tetrasodium;silicate Chemical compound [Na+].[Na+].[Na+].[Na+].[O-][Si]([O-])([O-])[O-] POWFTOSLLWLEBN-UHFFFAOYSA-N 0.000 description 2
- 229910000976 Electrical steel Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- ANBBXQWFNXMHLD-UHFFFAOYSA-N aluminum;sodium;oxygen(2-) Chemical compound [O-2].[O-2].[Na+].[Al+3] ANBBXQWFNXMHLD-UHFFFAOYSA-N 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 150000001639 boron compounds Chemical class 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- CPLXHLVBOLITMK-UHFFFAOYSA-N magnesium oxide Inorganic materials [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- 150000001247 metal acetylides Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 1
- 239000010452 phosphate Substances 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000001953 recrystallisation Methods 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 229910001388 sodium aluminate Inorganic materials 0.000 description 1
- 239000001488 sodium phosphate Substances 0.000 description 1
- 229910000162 sodium phosphate Inorganic materials 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
- 238000011282 treatment Methods 0.000 description 1
- RYFMWSXOAZQYPI-UHFFFAOYSA-K trisodium phosphate Chemical compound [Na+].[Na+].[Na+].[O-]P([O-])([O-])=O RYFMWSXOAZQYPI-UHFFFAOYSA-K 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/68—Temporary coatings or embedding materials applied before or during heat treatment
- C21D1/70—Temporary coatings or embedding materials applied before or during heat treatment while heating or quenching
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Strip Materials And Filament Materials (AREA)
Description
本発明は鋼帯の密着防止剤およびその使用方法
に係り、特に鋼帯の連続焼鈍時の鋼板相互間の密
着を防止する密着防止剤およびその使用方法に関
する。
一般に冷間圧延後の鋼帯は、目的とする機械的
性質を得るために再結晶軟化焼鈍が施され、その
加工性を向上させる。しかしこの焼鈍工程におい
ては、鋼帯コイルの密着面が相互に焼付き密着
（以下単に密着と称する）を起し、コイルの巻戻
し時に、いわゆる「腰折れ」と称される材料の降
伏現象を生じ、甚しい場合は、鋼帯の破損をもた
らすことがある。この密着を防止する従来対策と
して次の如き方法が採られてきた。
(イ) 鋼帯コイルの巻取り張力を小さくする。
(ロ) 焼鈍温度を可能な限り低くする。
(ハ) 鋼帯の表面粗度を上げる。
(ニ) 電解洗浄により鋼板表面にシリケートを付着
させる。
(ホ) 焼鈍工程前に剥離剤を塗布する。
しかし上記(イ)の方法は、巻き取り張力を小さく
することによりコイル自体の変形等をもたらし、
コイルの巻き戻し時に鋼帯が相互にすれ合つてす
り疵を多発する欠点がある。また、上記(ロ)、(ハ)の
方法は一応密着性を防止する有効な方法ではある
が、製品に要求される機械的性質および表面性状
を満足させることが第一義である以上これらの方
法には限度があり完全に密着を防止することはで
きない。また近年鋼帯コイルの大型化が進む傾向
にあり、コイルの単重が増加するに従つて巻き取
り張力を大とする必要があることにより、巻き取
り張力の調整のみによつてこの問題を完全に解決
できるものではない。更に上記(ニ)の対策も有効で
あることが周知である。この方法は冷間圧延後焼
鈍工程前にオルソ珪酸ソーダをベースとした洗浄
液中にて電解洗浄を行う場合、洗浄後の鋼板表面
にシリケートが電着し、これが焼鈍時の密着防止
に効果があることも知られている。しかしオルソ
珪酸ソーダ液中で電解洗浄した鋼板は密着するシ
リケート量により焼鈍後しばしば表面に酸化被膜
を生じ、その結果いわゆるテンパーカラーを発生
し外観が損なわれるという欠点がある。
また、上記(ホ)の剥離剤を塗布する方法は、珪素
鋼板の如く高温で焼鈍する場合には、かなり以前
から用いられ、その剥離剤としてはシリカ、アル
ミナ、チタニア等の酸化物および高温で安定な炭
化物、窒素物等が用いられている。例えば米国特
許第3282947号にはアルミナを用い密着を防止す
る方法が開示されている。すなわち、200〜400メ
ツシユのアルミナ粉末を水溶液中に懸濁させ、鋼
板表面に塗布後乾燥させ、アルミナ粉末層を残す
方法である。
ところで、この方法は確かに密着防止には効果
があるが、アルミナ粉末の粒径が大きいので鋼板
表面上に汚れとして目立ち、焼鈍後のコイルまた
はシートからアルミナ粉末を除去しなければなら
ない難点がある。
また米国特許第3583887号には少量の硼素化合
物を添加した酸化マグネシウムを懸濁液として塗
布し、風乾したものを剥離剤として用いることが
開示されている。
更に特公昭46−34289にはコロイダルシリカ等
の微小金属酸化物のコロイド溶液を塗布すること
が示されている。
しかし上記従来技術による剥離剤を使用する場
合には、鋼板表面の外観を損なうばかりではなく
特にコロイダルシリカの場合にはテンパーカラー
が発生する等の欠点があるほか、焼鈍後のボンデ
処理、めつき処理等の表面処理が不良となるなど
多くの問題を生ずる欠点がある。
本発明の目的は、鋼帯の焼鈍時の密着を防止す
る前記従来技術の欠点を克服し、鋼板の密着を防
止するのみならず、焼鈍後のボンデ処理、めつき
処理等の表面処理においてもなんらの問題を生ず
ることのない鋼帯の密着防止剤およびその使用方
法を提供するにある。
本発明による密着防止剤の要旨は次の如くであ
る。すなわち、アルミン酸アルカリ水溶液をりん
酸で中和することによつて得られる水酸化アルミ
ニウムを主成分とするコロイド溶液から成ること
を特徴とする鋼帯の密着防止剤、である。
而して、本発明による鋼板の密着防止剤の使用
方法の要旨は次のとおりである。
すなわち、アルミン酸アルカリ水溶液をりん酸
で中和することによつて得られる水酸化アルミニ
ウムを主成分とするコロイド溶液を0.01〜５重量
％含有する水分散液を調整する工程と、前記水分
散液を塗布量が固形分として１〜50mg／m2となる
如く鋼帯表面に塗布した後乾燥する工程と、前記
乾燥した鋼帯をコイル状に巻取つた後焼鈍する工
程と、を有して成ることを特徴とする鋼帯の密着
防止剤使用方法で、ある。
すなわち、本発明による密着防止剤は、アルミ
ン酸ナトリウム、もしくはアルミン酸カリウム等
のアルミン酸アルカリ水溶液をそれぞれ単独もし
くは同時に使用することができ、これをりん酸で
中和することによつて得られる微小水酸化アルミ
ニウムを主成分とし、その他少量の不可避的成分
を含むコロイド溶液であつて、不可避的成分のコ
ロイド溶液としてはりん酸ナトリウム、もしくは
りん酸カリウム等のコロイド溶液であるが、これ
らの微小水酸化アルミニウム以外の少量のりん酸
アルカリのコロイドも密着防止効果を有すること
が明らかとなつた。
次に本発明による密着防止剤の使用方法につい
て説明する。先ず本発明によるコロイド溶液を
0.01〜５重量％含有する水分散液を調製し、この
水分散液を例えばスプレー法等により塗布量が固
形分として１〜50mg／m2になるように鋼板の表面
に均等に塗布した後乾燥する。この乾燥した鋼帯
をコイル状に巻取つた後焼鈍する方法をとるので
ある。
上記本発明による密着防止剤の使用方法におい
て、コロイド溶液の水分散濃度を0.01〜５重量％
の範囲に限定したのは、0.01重量％未満では濃度
が過少で必要な塗布量が得られず、また５重量％
を越すと濃度が過大となつて変色むらを生ずるお
それがあるからである。また、塗布量を固型分と
して鋼板の単位面積m2当り１〜50mgに限定したの
は、１mg／m2未満の場合には密着防止の効果が得
られず、また50mg／m2を越すと焼鈍後の鋼板に変
色むらを生ずる可能性があるからである。
実施例 １
本発明による密着防止剤を本発明による使用方
法によつて塗布した場合および水分散濃度および
塗布量が本発明の限定範囲外の場合、更に従来の
密着防止剤を使用した場合について比較塗布試験
を行ない、焼鈍後の鋼板の密着剥離強度および密
着防止剤を使用しない場合との密着剥離強度減少
率のほか表面性状、ボンデ処理性の比較試験を行
なつた。該試験方法は次の如くである。
先ず撹拌装置を備えたビーカーに10％アルミン
酸カリウム水溶液をとり、撹拌しながら10％りん
酸水溶液を徐々に滴下しながらコロイド状水酸化
アルミニウムを生成させPHを８に調整した。この
コロイド溶液を第１表に示す如く0.005重量％か
ら80重量％まで種々変化させ各濃度に水で希釈
し、供試密着防止剤とした。
この密着防止剤をJIS G3141のSPCC−Ｄ鋼板
150mm×50mm×0.5mmの供試材にスプレー塗布後風
乾した。この場合のスプレー条件は次のとおりで
ある。
スプレー圧：１Kg／cm2
スプレー量：0.5／min
温度：常温
スプレー時間：2sec
密着防止剤を塗布、乾燥した供試鋼板を30mm×
80mmに切断し、第１図に示す如くホルダー２にセ
ツトし、供試鋼板４の加圧面積を30mm×50mmとし
面圧Ｐが20Kg／cm2になるように加圧した後、焼鈍
炉６に装入し焼鈍した。焼鈍条件は工場生産時と
同一に次の如く設定した。
焼鈍雰囲気：H2＋５％H2混合ガス
焼鈍温度：700℃
昇温時間：２時間
焼鈍時間：２時間
焼鈍終了後、第１図に示す如く上下２枚の供試
鋼板４を反対方向に引張り剥離強度Ｔを測定し
た。結果は第１表に示すとおりである。
第１表より明らかなとおり、本発明の要件を満
足する供試材No.１〜No.５は、いずれも密着剥離強
度が25.2〜31.0Kg／cm2であつて剥離容易であり、
密着防止剤を全然使用しない供試材No.12に
The present invention relates to an anti-adhesion agent for steel strips and a method for using the same, and more particularly to an anti-adhesion agent for preventing adhesion between steel plates during continuous annealing of a steel strip, and a method for using the same. In general, a steel strip after cold rolling is subjected to recrystallization softening annealing in order to obtain desired mechanical properties, thereby improving its workability. However, in this annealing process, the adhesion surfaces of the steel strip coils seize and stick to each other (hereinafter simply referred to as adhesion), and when the coil is unwound, a material yielding phenomenon called "waist bending" occurs. , In severe cases, it may result in damage to the steel strip. Conventionally, the following methods have been adopted to prevent this close contact. (a) Reduce the winding tension of the steel strip coil. (b) Lower the annealing temperature as much as possible. (c) Increase the surface roughness of the steel strip. (d) Adhering silicate to the surface of the steel plate by electrolytic cleaning. (e) Apply a release agent before the annealing process. However, method (a) above causes deformation of the coil itself by reducing the winding tension.
There is a drawback that the steel strips rub against each other during unwinding of the coil, resulting in frequent scratches. In addition, although methods (b) and (c) above are effective methods for preventing adhesion, these methods are important because the primary objective is to satisfy the mechanical properties and surface properties required for the product. There are limits to this method and it is not possible to completely prevent adhesion. In addition, in recent years, steel strip coils have tended to become larger, and as the unit weight of the coil increases, it is necessary to increase the winding tension. It is not something that can be solved. Furthermore, it is well known that the above measure (d) is also effective. In this method, when electrolytic cleaning is performed in a cleaning solution based on sodium orthosilicate before annealing after cold rolling, silicate is electrodeposited on the surface of the steel sheet after cleaning, which is effective in preventing adhesion during annealing. It is also known that However, a steel plate electrolytically cleaned in a sodium orthosilicate solution has the disadvantage that an oxide film is often formed on the surface after annealing due to the amount of silicate adhering to the steel plate, resulting in so-called temper color, which impairs the appearance. In addition, the above method (e) of applying a release agent has been used for a long time when annealing silicon steel sheets at high temperatures. Stable carbides, nitrogen substances, etc. are used. For example, US Pat. No. 3,282,947 discloses a method of using alumina to prevent adhesion. That is, 200 to 400 meshes of alumina powder are suspended in an aqueous solution, applied to the surface of a steel plate, and then dried to leave an alumina powder layer. By the way, although this method is certainly effective in preventing adhesion, the particle size of the alumina powder is large, so it stands out as dirt on the surface of the steel sheet, and it has the disadvantage that the alumina powder must be removed from the coil or sheet after annealing. . Further, US Pat. No. 3,583,887 discloses that magnesium oxide to which a small amount of a boron compound is added is applied as a suspension, air-dried, and used as a release agent. Furthermore, Japanese Patent Publication No. 46-34289 discloses applying a colloidal solution of a minute metal oxide such as colloidal silica. However, when using the above-mentioned conventional stripping agent, it not only impairs the appearance of the steel sheet surface but also has drawbacks such as the generation of temper color especially in the case of colloidal silica. It has the disadvantage of causing many problems such as poor surface treatment. It is an object of the present invention to overcome the drawbacks of the prior art technology that prevents adhesion during annealing of steel strips, and to prevent not only adhesion of steel sheets but also surface treatments such as bonding and plating after annealing. It is an object of the present invention to provide an anti-adhesion agent for steel strips that does not cause any problems, and a method for using the same. The gist of the anti-adhesion agent according to the present invention is as follows. That is, it is an anti-adhesion agent for steel strips characterized by being made of a colloidal solution containing aluminum hydroxide as a main component, which is obtained by neutralizing an aqueous alkali aluminate solution with phosphoric acid. The gist of the method for using the anti-adhesion agent for steel sheets according to the present invention is as follows. That is, a step of preparing an aqueous dispersion containing 0.01 to 5% by weight of a colloidal solution containing aluminum hydroxide as a main component obtained by neutralizing an alkaline aluminate aqueous solution with phosphoric acid; a step of coating the surface of the steel strip at a coating amount of 1 to 50 mg/ m2 as solid content and then drying it, and a step of winding the dried steel strip into a coil shape and then annealing it. This is a method of using an anti-adhesion agent for steel strips, which is characterized by: That is, the anti-adhesion agent according to the present invention can be prepared by using an aqueous alkali aluminate solution such as sodium aluminate or potassium aluminate alone or simultaneously, and by neutralizing this with phosphoric acid. It is a colloidal solution containing aluminum hydroxide as the main component and a small amount of other unavoidable components.The colloidal solution of the unavoidable components is a colloidal solution of sodium phosphate, potassium phosphate, etc. It has become clear that a small amount of alkali phosphate colloid other than aluminum oxide also has an adhesion prevention effect. Next, a method of using the anti-adhesion agent according to the present invention will be explained. First, a colloidal solution according to the present invention is
An aqueous dispersion containing 0.01 to 5% by weight is prepared, and this aqueous dispersion is evenly applied to the surface of a steel plate by, for example, a spray method so that the coating amount is 1 to 50 mg/ m2 as solid content, and then dried. do. This dried steel strip is wound into a coil and then annealed. In the above method for using the anti-adhesion agent according to the present invention, the aqueous dispersion concentration of the colloidal solution is 0.01 to 5% by weight.
The reason for limiting the range is that if it is less than 0.01% by weight, the concentration is too low and the necessary coating amount cannot be obtained, and if it is less than 5% by weight,
This is because if the concentration is exceeded, the concentration may become excessive and uneven discoloration may occur. In addition, the application amount was limited to 1 to 50 mg per unit area m2 of the steel plate in terms of solid content, because if it is less than 1 mg/ m2 , the effect of preventing adhesion cannot be obtained, and if it exceeds 50 mg/ m2 , This is because there is a possibility that uneven discoloration may occur on the steel plate after annealing. Example 1 Comparison of the case where the anti-adhesion agent according to the present invention is applied by the method of use according to the present invention, the case where the water dispersion concentration and the application amount are outside the limited range of the present invention, and the case where a conventional anti-adhesion agent is used. A coating test was conducted to compare the adhesion peel strength of the steel plate after annealing and the rate of decrease in adhesion peel strength compared to when no adhesion inhibitor was used, as well as surface properties and bonding processability. The test method is as follows. First, a 10% aqueous potassium aluminate solution was placed in a beaker equipped with a stirring device, and while stirring, a 10% aqueous phosphoric acid solution was gradually added dropwise to generate colloidal aluminum hydroxide and the pH was adjusted to 8. This colloidal solution was varied in concentration from 0.005% by weight to 80% by weight as shown in Table 1, and diluted with water to each concentration to prepare a test anti-adhesion agent. This anti-adhesion agent is applied to JIS G3141 SPCC-D steel plate.
It was sprayed onto a 150mm x 50mm x 0.5mm test material and air-dried. The spray conditions in this case are as follows. Spray pressure: 1Kg/cm 2 Spray amount: 0.5/min Temperature: Room temperature Spray time: 2sec The test steel plate coated with anti-adhesion agent and dried is 30mm x
It was cut into 80 mm pieces, set in the holder 2 as shown in Fig. 1, and the pressurized area of the test steel plate 4 was 30 mm x 50 mm, and after pressurizing it so that the surface pressure P was 20 Kg/cm 2 , it was placed in the annealing furnace 6. It was charged and annealed. The annealing conditions were set as follows, the same as during factory production. Annealing atmosphere: H 2 + 5% H 2 mixed gas Annealing temperature: 700°C Temperature rising time: 2 hours Annealing time: 2 hours After the annealing, the upper and lower two test steel plates 4 were pulled in opposite directions as shown in Figure 1. Peel strength T was measured. The results are shown in Table 1. As is clear from Table 1, sample materials No. 1 to No. 5 that satisfy the requirements of the present invention all have an adhesive peel strength of 25.2 to 31.0 Kg/cm 2 and are easily peeled.
Test material No. 12 that does not use any anti-adhesion agent
【表】
比し剥離強度が14〜30％減少し、その表面性状お
よびボンデ処理性は良好であつた。これに対し、
供試材No.６はコロイド溶液の濃度が0.005重量％
であり、かつ固形分塗布量が0.5mg／m2と過少で
あつたので剥離強度が高く、効果がないことを示
している。供試材No.７はコロイド溶液の濃度が
8.0重量％、固形分塗布量が60mg／m2と限定条件
に比し過大であるので剥離強度が低いが、焼鈍の
鋼板にテンパーカラーが現れ変色むらが発生して
いる。一方、従来法のりん酸カリを使用した供試
材No.８は剥離強度高く、コロイダルシリカを密着
防止剤として使用した供試材No.９〜No.11は、コロ
イダルシリカの濃度がそれぞれ0.05％、0.10％、
0.50％であるが、いずれも表面性状が悪く、一部
もしくは全面に変色むらが発生し、そのボンデ処
理性もNo.10、11については不良である。なお、比
較のために試験した密着防止剤を使用しない密着
防止剤No.12は冷延後脱脂したままのもので当然の
ことながら剥離強度が36.0Kg／cm2と極めて高い。
なお、焼鈍時の密着防止の目的から、密着防止剤
を全然使用しない場合の剥離強度より25％低下す
れば十分であり、実際操業では27mg／m2前後の塗
布量で使用することが好ましい。また、従来のコ
ロイダルシリカは固型分塗布量８mg／m2でも表面
性状に変色が発生し、しかも剥離強度の低下率が
低く、本発明剤の27mg／m2に近い効果を得ようと
すれば表面性状およびボンデ処理性が不良となる
ので実用には供し得ない。
本実施例より明らかな如く、本発明による密着
防止剤を本発明による使用方法によつて使用する
場合は、密着防止剤を全然使用しない場合に比
し、密着剥離強度を14〜30％低減することがで
き、しかも鋼板の表面性状に影響を及ぼすことな
く美麗な鋼板を得ることができ、かつそのボンデ
処理性もきわめて良好であつた。
実施例 ２
本発明を実際生産ラインに適用した場合の実施
例について第２図により説明する。冷延された鋼
帯１０は脱脂処理された後温水リンスタンク１２
によつてリンスされる。リンスされた鋼帯１０は
３組の絞りロール１４によつて水切りされドライ
ヤー１６によつて乾燥され、テンシヨンプライド
ルロール１８を経てテンシヨンリール２０によつ
てコイルに巻取られる。本実施例は板厚0.2〜0.5
mm、板幅最大1600mm、鋼帯の走行速度800ｍ／
minの場合に本発明を適用した。
すなわち、本発明による水酸化アルミニウムを
主成分とするコロイド溶液の0.5％水溶液タンク
２２を設け、かつタンク２２にはコロイドの沈澱
防止用に撹拌機２４を設け、配管２６を通じてポ
ンプ２８によつて絞りロール１４の１本目と２本
目の間に塗布ヘツダー３０を設けノズル３２より
上下から鋼帯１０の表裏に密着防止剤３４を噴射
し、絞りロール１４の２本目と３本目で水切りを
行つた。
密着防止剤３４の水溶液の塗布流量は10〜20
／minであり、その結果鋼帯１０の板面には３
〜10mg／m2の固形分相当量の密着防止剤が付着さ
れた。密着防止剤３４を付着した鋼板１０はコイ
ル３６に巻取られ連続焼鈍された。
本発明により生産された冷延鋼帯量は7.763tで
あつたが、この間に焼付不良品の発生は0.014％
であつた。これを従来の密着防止剤を使用しなか
つた期間の生産量16.806tに対し焼付不良品率
1.646％に比較すれば焼付不良減少率が0.85％と
1/100以下に減少する効果を収めることができ
た。
上記２実施例より明らかな如く、本発明による
水酸化アルミニウムを主成分とするコロイド溶液
より成る密着防止剤を本発明による使用方法によ
つて連続焼鈍鋼帯に適用することにより次の如き
大きな効果を収めることができた。
(イ) 焼鈍鋼帯コイルの焼付きを防止し、その密着
剥離強度を約27％減少させることができた。
(ロ) 本発明によつて実際操業における焼付きによ
る不良率1.6％を1/100以下の0.014％に減少す
ることができた。
(ハ) 本発明の実施によつても鋼帯の表面性状が影
響を受けることがなく、常に美麗な表面を有す
る鋼板を得ることができ、また従来の如くボン
デ処理、めつき処理においても支障を来たさ
ず、そのまま処理可能である。
(ニ) 焼鈍鋼帯に酸化被膜等テンパーカラーを発生
することもない。[Table] The peel strength was reduced by 14 to 30%, and the surface quality and bonding processability were good. On the other hand,
Sample material No. 6 has a colloid solution concentration of 0.005% by weight.
Moreover, since the amount of solid content applied was too small at 0.5 mg/m 2 , the peel strength was high, indicating that there was no effect. Sample material No. 7 has a colloidal solution concentration of
The peel strength was low because the coating amount of 8.0% by weight and solid content was 60mg/m 2 compared to the limiting conditions, but temper color appeared on the annealed steel plate and uneven discoloration occurred. On the other hand, sample material No. 8 using conventional potassium phosphate has high peel strength, and sample materials No. 9 to No. 11 using colloidal silica as an anti-adhesion agent each have a colloidal silica concentration of 0.05. %, 0.10%,
0.50%, but both had poor surface properties, with uneven discoloration occurring on part or the entire surface, and bonding processability was also poor for Nos. 10 and 11. Note that anti-adhesion agent No. 12, which was tested for comparison and did not use an anti-adhesion agent, was degreased after cold rolling and naturally had an extremely high peel strength of 36.0 Kg/cm 2 .
In addition, for the purpose of preventing adhesion during annealing, it is sufficient to reduce the peel strength by 25% from the peel strength when no adhesion inhibitor is used at all, and in actual operation, it is preferable to use the coating amount at around 27 mg/m 2 . Furthermore, with conventional colloidal silica, discoloration occurs in the surface texture even at a solid content coating amount of 8 mg/m 2 , and the rate of decrease in peel strength is low . Otherwise, the surface quality and bonding processability would be poor, so that it could not be put to practical use. As is clear from this example, when the anti-adhesion agent according to the present invention is used according to the method according to the present invention, the adhesion peel strength is reduced by 14 to 30% compared to when no anti-adhesion agent is used at all. Moreover, a beautiful steel plate could be obtained without affecting the surface properties of the steel plate, and the bonding processability thereof was also extremely good. Example 2 An example in which the present invention is applied to an actual production line will be described with reference to FIG. After the cold-rolled steel strip 10 is degreased, it is placed in a hot water rinse tank 12.
Rinsed by The rinsed steel strip 10 is drained by three sets of squeeze rolls 14, dried by a dryer 16, passed through a tension pry roll 18, and wound into a coil by a tension reel 20. In this example, the plate thickness is 0.2 to 0.5
mm, plate width max. 1600mm, steel strip running speed 800m/
The present invention was applied to the case of min. That is, a 0.5% aqueous solution tank 22 of a colloidal solution containing aluminum hydroxide as a main component according to the present invention is provided, and a stirrer 24 is provided in the tank 22 to prevent precipitation of the colloid. A coating header 30 was provided between the first and second rolls 14, and the anti-adhesion agent 34 was sprayed from above and below onto the front and back sides of the steel strip 10 from the nozzle 32, and water was removed by the second and third squeezing rolls 14. The application flow rate of the aqueous solution of adhesion prevention agent 34 is 10 to 20
/min, and as a result, the plate surface of the steel strip 10 has 3
An anti-adhesion agent was deposited in an amount equivalent to a solid content of ~10 mg/m 2 . The steel plate 10 coated with the anti-adhesion agent 34 was wound around a coil 36 and continuously annealed. The amount of cold rolled steel strip produced by the present invention was 7.763 tons, but the occurrence of seizure defects was 0.014% during this period.
It was hot. This is compared to the production volume of 16.806 tons during the period when conventional anti-adhesion agents were not used.
Compared to 1.646%, the reduction rate of seizure defects is 0.85%.
We were able to reduce the effect to less than 1/100. As is clear from the above two examples, by applying the anti-adhesion agent made of a colloidal solution containing aluminum hydroxide as a main component according to the present invention to a continuously annealed steel strip according to the method according to the present invention, the following great effects can be obtained. I was able to fit it in. (a) It was possible to prevent seizure of the annealed steel strip coil and reduce its adhesion peel strength by approximately 27%. (b) The present invention was able to reduce the defective rate of 1.6% due to seizure in actual operation to 0.014%, which is less than 1/100. (c) Even by implementing the present invention, the surface properties of the steel strip are not affected, and a steel plate with a beautiful surface can always be obtained, and there is no problem in bonding and plating treatments as in the past. It can be processed as is without causing any problems. (d) Temper color such as oxide film does not occur on the annealed steel strip.
第１図は本発明による実施例１の試験方法を示
す模式工程図、第２図は本発明を実際生産ライン
に適用した実施例２の工程を示す模式配置図であ
る。
２……ホルダー、４……鋼板、６……焼鈍炉、
１０……鋼帯、１２……温水リンスタンク、１４
……絞りロール、１６……ドライヤー、２２……
密着防止剤水溶液タンク、３２……ノズル、３４
……密着防止剤。
FIG. 1 is a schematic process diagram showing the test method of Example 1 according to the present invention, and FIG. 2 is a schematic layout diagram showing the process of Example 2 in which the present invention is applied to an actual production line. 2... Holder, 4... Steel plate, 6... Annealing furnace,
10... Steel strip, 12... Hot water rinse tank, 14
... Squeezing roll, 16 ... Dryer, 22 ...
Anti-adhesion agent aqueous solution tank, 32... Nozzle, 34
...Adhesion prevention agent.
Claims (1)
ることによつて得られる水酸化アルミニウムを主
成分とするコロイド溶液から成ることを特徴とす
る鋼帯の密着防止剤。 ２ アルミン酸アルカリ水溶液をりん酸で中和す
ることによつて得られる水酸化アルミニウムを主
成分とするコロイド溶液を0.01〜５重量％含有す
る水分散液を調整する工程と、前記水分散液を塗
布量が固形分として１〜50mg／m2となる如く鋼帯
表面に塗布した後乾燥する工程と、前記乾燥した
鋼帯をコイル状に巻取つた後焼鈍する工程と、を
有して成ることを特徴とする鋼帯の密着防止剤使
用方法。[Scope of Claims] 1. An anti-adhesion agent for steel strips, comprising a colloidal solution containing aluminum hydroxide as a main component, which is obtained by neutralizing an aqueous alkali aluminate solution with phosphoric acid. 2. A step of preparing an aqueous dispersion containing 0.01 to 5% by weight of a colloidal solution containing aluminum hydroxide as a main component obtained by neutralizing an alkaline aluminate aqueous solution with phosphoric acid; The method comprises a step of applying the product to the surface of the steel strip so that the amount of the product is 1 to 50 mg/ m2 in terms of solid content and then drying it, and a step of winding the dried steel strip into a coil shape and then annealing it. A method of using an anti-adhesion agent for steel strips, which is characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2244982A JPS58141339A (en) | 1982-02-15 | 1982-02-15 | Adhesion inhibitor for band steel and method for using it |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2244982A JPS58141339A (en) | 1982-02-15 | 1982-02-15 | Adhesion inhibitor for band steel and method for using it |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS58141339A JPS58141339A (en) | 1983-08-22 |
| JPS6229488B2 true JPS6229488B2 (en) | 1987-06-26 |
Family
ID=12083018
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2244982A Granted JPS58141339A (en) | 1982-02-15 | 1982-02-15 | Adhesion inhibitor for band steel and method for using it |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58141339A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63212786A (en) * | 1987-02-26 | 1988-09-05 | Sumitomo Electric Ind Ltd | pump rotor |
| JPS6447987U (en) * | 1987-09-18 | 1989-03-24 |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115786662A (en) * | 2022-11-28 | 2023-03-14 | 安徽鑫科铜业有限公司 | Anti-sticking agent for annealing copper strip and surface treatment method of copper strip |
-
1982
- 1982-02-15 JP JP2244982A patent/JPS58141339A/en active Granted
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63212786A (en) * | 1987-02-26 | 1988-09-05 | Sumitomo Electric Ind Ltd | pump rotor |
| JPS6447987U (en) * | 1987-09-18 | 1989-03-24 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS58141339A (en) | 1983-08-22 |
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