JPH082446B2 - Alloyed hot dip galvanized steel sheet and method for producing the same - Google Patents
Alloyed hot dip galvanized steel sheet and method for producing the sameInfo
- Publication number
- JPH082446B2 JPH082446B2 JP63068714A JP6871488A JPH082446B2 JP H082446 B2 JPH082446 B2 JP H082446B2 JP 63068714 A JP63068714 A JP 63068714A JP 6871488 A JP6871488 A JP 6871488A JP H082446 B2 JPH082446 B2 JP H082446B2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- dip galvanized
- hot
- alloyed
- alloyed hot
- 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 - Fee Related
Links
- 229910001335 Galvanized steel Inorganic materials 0.000 title claims description 13
- 239000008397 galvanized steel Substances 0.000 title claims description 13
- 238000004519 manufacturing process Methods 0.000 title claims description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 31
- 229910000831 Steel Inorganic materials 0.000 claims description 31
- 239000010959 steel Substances 0.000 claims description 31
- 229910052742 iron Inorganic materials 0.000 claims description 15
- 238000005246 galvanizing Methods 0.000 claims description 8
- 229910045601 alloy Inorganic materials 0.000 claims description 6
- 239000000956 alloy Substances 0.000 claims description 6
- 238000009713 electroplating Methods 0.000 claims description 3
- 238000005096 rolling process Methods 0.000 description 14
- 239000010410 layer Substances 0.000 description 13
- 238000000034 method Methods 0.000 description 11
- 238000000227 grinding Methods 0.000 description 10
- 238000007747 plating Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 6
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 5
- 229910052725 zinc Inorganic materials 0.000 description 5
- 239000011701 zinc Substances 0.000 description 5
- 238000005275 alloying Methods 0.000 description 4
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000011248 coating agent Substances 0.000 description 3
- 238000000576 coating method Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 238000003825 pressing Methods 0.000 description 3
- 230000003746 surface roughness Effects 0.000 description 3
- 238000000137 annealing Methods 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000008602 contraction Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000005098 hot rolling Methods 0.000 description 2
- 238000001953 recrystallisation Methods 0.000 description 2
- 239000010953 base metal Substances 0.000 description 1
- 238000005422 blasting Methods 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 238000005097 cold rolling Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
- 230000037303 wrinkles Effects 0.000 description 1
Landscapes
- Metal Rolling (AREA)
- Coating With Molten Metal (AREA)
Description
【発明の詳細な説明】 〈産業上の利用分野〉 本発明は、自動車外板等のようなプレス成形、塗装し
て用いられる合金化溶融亜鉛めっき鋼板およびその製造
方法に関する。TECHNICAL FIELD The present invention relates to an alloyed hot-dip galvanized steel sheet used for press forming and coating such as an automobile outer panel, and a method for producing the same.
〈従来の技術〉 従来より合金化溶融亜鉛めっき鋼板（以下GAで称す）
は、ゼンジマ方法溶融亜鉛めっきラインで鋼ストリップ
に亜鉛めっきを施したのち、加熱合金化処理を行って製
造されて来た。<Conventional technology> Conventionally, galvannealed steel sheet (hereinafter referred to as GA)
Has been manufactured by galvanizing a steel strip in a Sendzima method hot dip galvanizing line, followed by heat alloying treatment.
その方法を順を追って説明すると、まず、熱間圧延の
みにてまたは熱間圧延後冷間圧延にて所定板圧とされた
鋼ストリップは、還元雰囲気で加熱され、ストリップ表
面の酸化物を還元除去されると同時に、再結晶焼鈍され
る。Explaining the method step by step, first, a steel strip that has been subjected to a predetermined plate pressure only by hot rolling or by hot rolling and cold rolling is heated in a reducing atmosphere to reduce oxides on the strip surface. At the same time as it is removed, recrystallization annealing is performed.
その後、ストリップは還元雰囲気中で冷却され溶融亜
鉛めっき浴に浸漬されめっきされる。The strip is then cooled in a reducing atmosphere and immersed in a hot dip galvanizing bath for plating.
めっき浴から出たストリップは、直ちにガスワイピン
グを受け、目付量制御され、ロール等に触れることなく
加熱炉に入り、合金化される。The strip coming out of the plating bath is immediately subjected to gas wiping, the basis weight is controlled, and the strip enters the heating furnace without touching a roll or the like and is alloyed.
こうして製造されるGAは、最後に、鋼板形状を整える
ためテンションレベラーにかけられるか、調質圧延を施
される。The GA thus produced is finally subjected to a tension leveler or temper rolling to adjust the shape of the steel sheet.
一般にGA表面は、合金化処理によって著しく凹凸に富
む表面となっており、従って塗装して使用される場合に
は、鋼板形状を整え、同時にGA表面の粗度を下げ、塗装
後の外観をよくする目的で、軽度の調質圧延が施され
る。この時の圧下率は、鋼板の形状矯正を効果的に行
い、かつ焼鈍により調整された鋼板の機械的特性を維持
するため、0.2〜２％の範囲とされる。In general, the GA surface is a surface that is remarkably uneven due to the alloying treatment.Therefore, when it is used by coating, the steel plate shape is adjusted and the roughness of the GA surface is lowered at the same time to improve the appearance after painting. For this purpose, light temper rolling is performed. The rolling reduction at this time is in the range of 0.2 to 2% in order to effectively correct the shape of the steel sheet and maintain the mechanical properties of the steel sheet adjusted by annealing.
この圧下率の範囲で表面粗さを調整するためには、研
磨度、＃50〜＃80程度に分級されたグリッド粒でショッ
トブラスト処理されたロールが一般に用いられる。In order to adjust the surface roughness within the range of the rolling reduction, a roll shot-blasted with grid particles classified to a polishing degree of about # 50 to # 80 is generally used.
〈発明が解決しようとする課題〉 自動車用外板としてGA、あるいはさらに鉄または鉄系
合金の電気めっきが施されたGAを用いる時、プレス加工
において、縮みフランジ変形部での圧縮変形が厳しい
と、Zn-Feの合金であるGAめっき層が母材の変形に追従
出来ず、粉化して剥離（パウダリング）する。<Problems to be Solved by the Invention> When GA or an GA electroplated with iron or an iron-based alloy is used as an outer panel for an automobile, it is said that the compression deformation at the shrinking flange deforming portion is severe in the press working. The GA plating layer, which is an alloy of Zn-Fe, cannot follow the deformation of the base material and is powdered and peeled (powdering).
この剥離しためっき粉は、プレス型にこびり付いて鋼
板に星目等の欠陥を発生させる。パウダリングを防止す
る方法としては、めっき層中の鉄分の割合を限定した
り、あるいは表面層の純亜鉛めっきを施したりする方法
がとられる。The peeled plating powder sticks to the press die and causes defects such as stars in the steel plate. As a method of preventing powdering, there is a method of limiting the ratio of iron in the plating layer or performing pure zinc plating of the surface layer.
ところが、これらの方法では、プレス時のめっき剥離
は防げても、自動車外板用鋼板として重要なスポット溶
接性や、塗膜密着性の低下を招くなどの欠点があった。However, these methods have drawbacks such as spot weldability, which is important as a steel plate for automobile outer panels, and deterioration of coating film adhesion, even though the peeling of plating during pressing can be prevented.
本発明は、めっき特性を変えることなく縮みフランジ
部でのパウダリングが少なく、プレス加工時に星目等の
欠陥が発生し難いGAおよびその製造方法を提供すること
を目的としている。An object of the present invention is to provide a GA and a manufacturing method thereof in which powdering in a shrinking flange portion is small without changing plating characteristics, and defects such as stars are less likely to occur during press working.
〈課題を解決するための手段〉 上記目的を達成するために、本出願の第１の発明によ
れば、山頂部および谷部を有する合金化溶融亜鉛めっき
であって、前記山頂部は平坦部を有し、この平坦部の面
積が全鋼板表面の30％以上90％以下である合金化溶融亜
鉛めっき鋼板が提供される。<Means for Solving the Problems> In order to achieve the above object, according to the first invention of the present application, it is an alloyed hot-dip galvanizing having a crest and a valley, wherein the crest is a flat portion. And an area of this flat portion is 30% or more and 90% or less of the entire surface of the steel sheet.
また、本出願の第２の発明によれば、合金化溶融亜鉛
めっき層およびこの上に鉄または鉄系合金めっき層を有
し、山頂部および谷部を有する合金化溶融亜鉛めっきで
あって、前記山頂部は平坦部を有し、この平坦部の面積
が全鋼板表面の30％以上90％以下である合金化溶融亜鉛
めっき鋼板が提供される。Further, according to the second invention of the present application, an alloyed hot dip galvanized layer having an alloyed hot dip galvanized layer and an iron or iron-based alloy plated layer thereon, and having a peak and a valley, There is provided an alloyed hot-dip galvanized steel sheet in which the peak has a flat portion and the area of the flat portion is 30% or more and 90% or less of the entire surface of the steel sheet.
さらに、本出願の第３の発明によれば、前記第１の発
明に記載の合金化溶融亜鉛めっき鋼板を製造するにあた
って、鋼板を溶融亜鉛めっき浴に浸漬したのち、これを
加熱合金化し、さらに調質圧延により平坦部を有する山
頂部を形成することを特徴とする合金化溶融亜鉛めっき
鋼板の製造方法が提供される。Further, according to the third invention of the present application, in producing the alloyed hot-dip galvanized steel sheet according to the first invention, after dipping the steel sheet in a hot-dip galvanizing bath, it is heat-alloyed, and There is provided a method for manufacturing an alloyed hot-dip galvanized steel sheet, which comprises forming a peak having a flat portion by temper rolling.
また、本出願の第４の発明によれば、前記第２の発明
に記載の合金化溶融亜鉛めっき鋼板を製造するにあたっ
て、鋼板を溶融亜鉛めっき浴に浸漬したのち、これを加
熱合金化し、さらに調質圧延により平坦部を有する山頂
部を形成したのち、鉄または鉄系合金を電気めっきする
ことを特徴とする合金化溶融亜鉛めっき鋼板の製造方法
が提供される。Further, according to the fourth invention of the present application, in producing the alloyed hot-dip galvanized steel sheet according to the second invention, after dipping the steel sheet in a hot-dip galvanizing bath, it is heat-alloyed, and A method for producing an alloyed hot-dip galvanized steel sheet is provided, which comprises forming a peak having a flat portion by temper rolling and then electroplating iron or an iron-based alloy.
以下に、本発明をさらに詳細に説明する。 Hereinafter, the present invention will be described in more detail.
GAのプレス加工におけるパウダリング現象が、縮みフ
ランジ変形部における平面圧縮歪が大きくなると起り易
くなることに着目し、縮みフランジ部の変形における鋼
板流入方向への伸び変形の量を大きくし、平面圧縮歪を
小さくすることにより、パウダリングを抑制することを
考えた。Paying attention to the fact that the powdering phenomenon in the press working of GA tends to occur when the plane compression strain in the contraction flange deformation part becomes large, and the amount of elongation deformation in the inflow direction of the steel plate due to the deformation of the contraction flange part is increased to achieve the plane compression. We considered suppressing powdering by reducing the distortion.
縮みフランジ変形部における圧縮歪を抑制する方法と
しては、母材の（ランクフォード値）を小さくする、
プレス型を変える、あるいはプレス時のしわ押え圧力を
高くするなど、種々の方法が考えられるが、いずれも素
地鋼板の種類あるいは材質に依存するものである。As a method of suppressing the compressive strain in the shrinking flange deformed portion, the (Lankford value) of the base material is reduced,
Various methods are conceivable, such as changing the press die or increasing the wrinkle holding pressure at the time of pressing, but all of them depend on the type or material of the base steel sheet.
これに対して、本発明では鋼板の表面形状を調整しプ
レス変形における鋼板流入を抑制することにより、素地
鋼板の種類や材質に依存することなく伸び変形と表面圧
縮変形の割合を変えることができる。また、この方法は
プレス条件と組合わせることによって十分な効果を発揮
することができる。On the other hand, in the present invention, the ratio of elongation deformation and surface compression deformation can be changed without depending on the type or material of the base steel sheet by adjusting the surface shape of the steel sheet and suppressing the steel sheet inflow in press deformation. . In addition, this method can exert a sufficient effect by combining it with pressing conditions.
まず、冷延鋼板は、再結晶が十分に起り良好なプレス
成形性を得るのに必要な温度、例えば700〜880℃の温度
で焼鈍されたのち、冷却過程で、420〜500℃程度の温度
に保持された溶融亜鉛浴に浸漬されてめっきされ、ガス
ワイピングにより所定の亜鉛付着量としたのち、450〜6
00℃の温度に加熱保持されて、素地鋼板から付着亜鉛層
の中に鉄分を浴解させ、合金化し、冷却したのち、0.2
〜２％の圧下率で調質圧延されてGA製品となる。First, the cold-rolled steel sheet is annealed at a temperature necessary for obtaining good press formability by sufficient recrystallization, for example, 700 to 880 ° C, and then, in the cooling process, a temperature of about 420 to 500 ° C. After immersing in the hot dip zinc bath held in the plate and plating, and applying a predetermined amount of zinc by gas wiping, 450 ~ 6
It is heated and held at a temperature of 00 ° C, the iron content is bathed from the base steel sheet into the adhered zinc layer, alloyed and cooled, then 0.2
It is temper rolled with a reduction rate of ~ 2% to become GA products.
この加熱合金化処理において、過度に鉄分を付着亜鉛
層の中に浴解させるとパウダリングを助長するため、亜
鉛めっき層中の鉄分含有量として８〜13重量％になるよ
う合金化の程度を制御するとよい。In this heat-alloying treatment, if iron is excessively dissolved in the deposited zinc layer to facilitate powdering, the degree of alloying should be adjusted so that the iron content in the galvanized layer is 8 to 13% by weight. It is good to control.
その結果、調質圧延前の亜鉛めっき層の表面形状は、
例えば平均表面粗さSRaで1.3〜2.2μｍ程度、PPIで2000
〜5000程度となる。As a result, the surface shape of the galvanized layer before temper rolling was
For example, the average surface roughness SRa is 1.3 to 2.2 μm, and the PPI is 2000.
It will be about 5,000.
この表面形状は、つぎの調質圧延に際して用いられる
圧延ロールの表面形状が転写されて変化する。例えば、
通常用いられるショットブラスト処理により表面を研掃
したロールで、ショット粒のサイズが＃80メッシュに分
級されたものの場合の亜鉛めっき層の表面粗さSRaは0.7
〜1.4μｍまで小さくなる。This surface shape changes by transferring the surface shape of a rolling roll used in the subsequent temper rolling. For example,
The surface roughness SRa of the galvanized layer is 0.7 when the shot grain size is classified to # 80 mesh with a roll whose surface has been swept by a commonly used shot blasting treatment.
Reduced to ~ 1.4μm.
このように、亜鉛めっき層の表面形状は、調質圧延で
調整することが可能であるが、その調質圧延において、
亜鉛めっき層の凹凸の山頂平坦部の面積の割合が全表面
の30％以上好ましくは40％以上90％以下となるよう調整
することが、必要である。Thus, the surface shape of the galvanized layer can be adjusted by temper rolling, but in the temper rolling,
It is necessary to adjust the area ratio of the peak flat portion of the unevenness of the galvanized layer to 30% or more, preferably 40% or more and 90% or less of the entire surface.
一般に、ショットブラスト処理されたロールで圧延す
ると、ロール表面の凹凸は平坦部の少ない形状をしてい
るため、その形状が転写された鋼板は、平坦部面積が小
さく、20％以下となる。Generally, when rolled by a shot-blasted roll, the unevenness of the roll surface has a shape with few flat portions, so that the steel sheet to which the shape is transferred has a small flat portion area of 20% or less.
従って、所望の表面形状のGAを得るためには平坦部面
積の大きい表面をしたロールで調質圧延する必要があ
る。しかし、完全に平滑なロールで圧延すると、圧延に
おけるスリップが起ったり、ロール疵の転写により鋼板
の表面疵が生じたりすることがあるので、凹凸を有し、
かつ、鋼板表面を谷部、および平坦部を有する山頂部と
なるようなロールを用いることが望ましい。Therefore, in order to obtain a GA having a desired surface shape, it is necessary to temper-roll with a roll having a surface with a large flat area. However, when rolling with a completely smooth roll, slipping in rolling may occur, or surface flaws on the steel sheet may occur due to transfer of roll flaws.
In addition, it is desirable to use a roll having a valley portion and a peak portion having a flat portion on the surface of the steel sheet.
このような表面形状は、レーザービーム照射を用いて
ロール表面に規則的な凹凸をつけることによって得るこ
とが出来る。このようにして得られたロールの表面形状
を十分に鋼板に転写させて、所定の表面形状のGAを得る
と同時に、素地鋼板の機械的性質を害さないためには調
質圧延圧下率を0.5〜1.5％とすることが望ましい。Such a surface shape can be obtained by making irregularities on the roll surface by using laser beam irradiation. The surface shape of the roll thus obtained is sufficiently transferred to a steel sheet to obtain a GA having a predetermined surface shape, and at the same time, the temper rolling reduction ratio is set to 0.5 in order not to impair the mechanical properties of the base steel sheet. It is desirable to set it up to 1.5%.
GA表面の山頂平坦部の面積の割合が30％未満では、鋼
板面とプレス型との間に接触面積が少なく、鋼板流入を
抑制する効果が少なく、パウダリングが著しい。また、
90％を超えると、プレス油の保持が悪くなり、プレス成
形性が急激に低下し好ましくない。When the area ratio of the peak flat portion on the GA surface is less than 30%, the contact area between the steel plate surface and the press die is small, the effect of suppressing the steel plate inflow is small, and powdering is remarkable. Also,
If it exceeds 90%, the holding of the press oil becomes poor, and the press formability sharply decreases, which is not preferable.
〈実施例〉 以下に本発明を実施例に基づき具体的に説明する。<Examples> The present invention will be specifically described below based on Examples.
（実施例１〜６および比較例１〜４） 母材鋼板は、すべて表１に示す成分（重量％で示す）
および表２に示す材質特性をもつ0.7mm厚のものを用
い、表３に示す各GAを作成して、表４に示す条件で平底
円筒絞り試験を行い、めっき剥離重量を測定してパウダ
リング量とした。評価基準は○印…10mg未満、△印…10
mg以上20mg未満、×印…20mg以上とした。(Examples 1 to 6 and Comparative Examples 1 to 4) All the base metal steel sheets have the components shown in Table 1 (shown in wt%).
And using the 0.7 mm thick material with the material characteristics shown in Table 2, each GA shown in Table 3 was prepared, and a flat-bottomed cylindrical drawing test was performed under the conditions shown in Table 4 to measure the plating peeling weight and powdering. And quantity. The evaluation criteria are ○: less than 10 mg, △: 10
mg to less than 20 mg, x mark ... 20 mg or more.
なお、実施例４〜６および比較例３ならびに４は溶融
亜鉛めっき層の上に、さらに鉄系の電気めっきをしたGA
である。In addition, in Examples 4 to 6 and Comparative Examples 3 and 4, iron-based electroplating GA was further performed on the hot-dip galvanized layer.
Is.
〈発明の効果〉 本発明は、以上説明したように構成されているので、
自動車用外板として用いる時などの厳しいプレス加工時
にもプレス成形性、特に深絞り性を確保しつつ、かつパ
ウダリングが極めて少く、星目等ブレスによる欠陥の発
生が低減できるという効果を奏する。また、上記のよう
にパウダリングの少ないGAを簡単な方法で安定して製造
することができるという効果を奏する。 <Effects of the Invention> Since the present invention is configured as described above,
Even during severe press working such as when used as an outer panel for automobiles, the press formability, especially the deep drawability is ensured, powdering is extremely small, and the occurrence of defects due to breath such as stars can be reduced. Further, as described above, the GA with less powdering can be stably manufactured by a simple method.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−224791（ＪＰ，Ａ) 特開 昭62−168602（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-60-224791 (JP, A) JP-A-62-168602 (JP, A)
Claims (4)
めっきであって、前記山頂部は平坦部を有し、この平坦
部の面積が全鋼板表面の30％以上90％以下である合金化
溶融亜鉛めっき鋼板。1. An alloyed hot-dip galvanized product having crests and valleys, wherein the crests have a flat portion, and the area of the flat portion is 30% or more and 90% or less of the entire steel plate surface. Hot-dip galvanized steel sheet.
または鉄系合金めっき層を有し、山頂部および谷部を有
する合金化溶融亜鉛めっきであって、前記山頂部は平坦
部を有し、この平坦部の面積が全鋼板表面の30％以上90
％以下である合金化溶融亜鉛めっき鋼板。2. An alloyed hot-dip galvanized layer having an alloyed hot-dip galvanized layer and an iron or iron-based alloy plated layer on the hot-dip galvanized layer, the crest having a flat portion. However, the area of this flat part is 30% or more of the entire steel plate surface 90
% Hot rolled galvanized steel sheet.
板を製造するにあたって、鋼板を溶融亜鉛めっき浴に浸
漬したのち、これを加熱合金化し、さらに調質圧延によ
り平坦部を有する山頂部を形成することを特徴とする合
金化溶融亜鉛めっき鋼板の製造方法。3. In producing the alloyed hot-dip galvanized steel sheet according to claim 1, the steel sheet is dipped in a hot-dip galvanizing bath, heat-alloyed, and temper-rolled to obtain a peak portion having a flat portion. A method for producing an alloyed hot-dip galvanized steel sheet, comprising:
板を製造するにあたって、鋼板を溶融亜鉛めっき浴に浸
漬したのち、これを加熱合金化し、さらに調質圧延によ
り平坦部を有する山頂部を形成したのち、鉄または鉄系
合金を電気めっきすることを特徴とする合金化溶融亜鉛
めっき鋼板の製造方法。4. In producing the alloyed hot-dip galvanized steel sheet according to claim 2, the steel sheet is immersed in a hot-dip galvanizing bath, heat-alloyed, and temper-rolled to obtain a peak portion having a flat portion. And then electroplating iron or iron-based alloy after forming the alloyed hot-dip galvanized steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63068714A JPH082446B2 (en) | 1988-03-23 | 1988-03-23 | Alloyed hot dip galvanized steel sheet and method for producing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63068714A JPH082446B2 (en) | 1988-03-23 | 1988-03-23 | Alloyed hot dip galvanized steel sheet and method for producing the same |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01242765A JPH01242765A (en) | 1989-09-27 |
| JPH082446B2 true JPH082446B2 (en) | 1996-01-17 |
Family
ID=13381732
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63068714A Expired - Fee Related JPH082446B2 (en) | 1988-03-23 | 1988-03-23 | Alloyed hot dip galvanized steel sheet and method for producing the same |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH082446B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2704070B2 (en) * | 1991-10-30 | 1998-01-26 | 川崎製鉄株式会社 | Alloyed hot-dip galvanized steel sheet with excellent press mold sliding properties |
| JP4696376B2 (en) * | 2001-03-06 | 2011-06-08 | Ｊｆｅスチール株式会社 | Alloy hot-dip galvanized steel sheet |
| JP5589269B2 (en) * | 2008-09-25 | 2014-09-17 | 新日鐵住金株式会社 | Alloyed hot-dip galvanized steel sheet and method for producing alloyed hot-dip galvanized steel sheet |
| JP6331257B2 (en) * | 2013-04-09 | 2018-05-30 | 新日鐵住金株式会社 | Method for evaluating powdering resistance of plated steel sheets |
-
1988
- 1988-03-23 JP JP63068714A patent/JPH082446B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01242765A (en) | 1989-09-27 |
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