JPH0639686B2 - Alloyed vacuum-deposited zinc plated steel plate with excellent workability - Google Patents
Alloyed vacuum-deposited zinc plated steel plate with excellent workabilityInfo
- Publication number
- JPH0639686B2 JPH0639686B2 JP61008107A JP810786A JPH0639686B2 JP H0639686 B2 JPH0639686 B2 JP H0639686B2 JP 61008107 A JP61008107 A JP 61008107A JP 810786 A JP810786 A JP 810786A JP H0639686 B2 JPH0639686 B2 JP H0639686B2
- Authority
- JP
- Japan
- Prior art keywords
- alloyed
- phase
- vacuum
- steel sheet
- galvanized steel
- 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 - Lifetime
Links
- 229910000831 Steel Inorganic materials 0.000 title description 12
- 239000010959 steel Substances 0.000 title description 12
- 239000011701 zinc Substances 0.000 title description 6
- 229910052725 zinc Inorganic materials 0.000 title description 3
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 title description 2
- 229910001335 Galvanized steel Inorganic materials 0.000 claims description 23
- 239000008397 galvanized steel Substances 0.000 claims description 23
- 229910045601 alloy Inorganic materials 0.000 claims description 19
- 239000000956 alloy Substances 0.000 claims description 19
- 238000002441 X-ray diffraction Methods 0.000 claims description 9
- 238000000227 grinding Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 7
- 238000010438 heat treatment Methods 0.000 description 5
- 239000000203 mixture Substances 0.000 description 5
- 238000005452 bending Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000007747 plating Methods 0.000 description 3
- 238000007740 vapor deposition Methods 0.000 description 3
- 229920000298 Cellophane Polymers 0.000 description 2
- 229910001297 Zn alloy Inorganic materials 0.000 description 2
- 238000000137 annealing Methods 0.000 description 2
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000011156 evaluation Methods 0.000 description 2
- 238000005246 galvanizing Methods 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000000052 comparative effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010304 firing Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000012299 nitrogen atmosphere Substances 0.000 description 1
- 239000003973 paint Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000007738 vacuum evaporation Methods 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Landscapes
- Physical Vapour Deposition (AREA)
Description
【発明の詳細な説明】 〈技術分野〉 本発明は加工性の優れた合金化真空蒸着亜鉛めっき鋼板
に関する。TECHNICAL FIELD The present invention relates to an alloyed vacuum-deposited galvanized steel sheet having excellent workability.
〈従来技術および問題点〉 亜鉛めっき鋼板には溶融めっき法によるものと電気めっ
き法によるものがある。しかし、溶融めっき法では付着
量が少ない例えば30ｇ／m2以下の薄めっき鋼板の製造お
よび片面めっき鋼板の製造が困難であり、一方、電気亜
鉛めっき法では亜鉛の付着量の増大にともなって製造コ
ストが上昇するという欠点がある。これに対して真空蒸
着亜鉛めっき法では薄めっきから厚めっき鋼板まで高速
で製造可能で、しかも、両面めっき、片面めっき、差厚
めっき鋼板の製造が可能である利点を有する。<Prior art and problems> There are two types of galvanized steel sheets, one is by hot dipping and the other is by electroplating. However, it is difficult to produce a thin coated steel sheet having a small amount of adhesion, for example, 30 g / m 2 or less, and a single-sided plated steel sheet by the hot dipping method, while the electrogalvanizing method produces an increase in the zinc adhesion amount. It has the drawback of increasing costs. On the other hand, the vacuum vapor deposition galvanizing method has an advantage that it is possible to manufacture from thin plating to thickly plated steel sheet at high speed, and also to manufacture double-sided plating, single-sided plating, and difference-thickness plated steel sheet.
従来の溶融亜鉛めっき鋼板あるいは電気亜鉛めっき鋼板
に加熱処理を施し、めっき層をFeとZnの合金とした、い
わゆる合金化亜鉛めっき鋼板は通常の亜鉛めっき鋼板に
比べて、塗装密着性とスポット溶接性が優れている利点
を有しているが、合金層の加工性が劣るという欠点を有
している。Conventional galvanized steel sheets or electrogalvanized steel sheets are heat treated to form an alloy of Fe and Zn, the so-called alloyed galvanized steel sheets have better paint adhesion and spot welding than ordinary galvanized steel sheets. However, it has the disadvantage that the workability of the alloy layer is poor.
すなわち，合金化亜鉛めっき鋼板ではプレス成形等の加
工を施した場合，合金層が粉状に剥離するパウダリング
現象が生ずるという欠点がある。このパウダリング現象
が著しい場合には粉状に剥離した合金層がプレス金型に
堆積してプレス傷や板破断が発生し，プレス作業に悪影
響を及ぼすばかりでなく，鋼板表面に合金層が存在しな
い状態に近い状態となり，耐食性が低下する。That is, the alloyed galvanized steel sheet has a drawback that when it is subjected to processing such as press forming, a powdering phenomenon occurs in which the alloy layer is separated into powder. When this powdering phenomenon is significant, the alloy layer separated in powder form accumulates on the press die, causing press scratches and plate breakage, which not only adversely affects the press work, but also the presence of the alloy layer on the steel plate surface. Corrosion resistance is reduced due to the state close to that of no corrosion.
これに対して、真空蒸着亜鉛めっき鋼板の製造技術の開
発は歴史的に浅く、その合金層組成と加工性の関係を調
べた報告はない。On the other hand, the development of the vacuum evaporation galvanized steel sheet manufacturing technology has been short history, and there is no report investigating the relationship between the alloy layer composition and the workability.
本発明者らは上記状況にかんがみ、合金化真空蒸着亜鉛
めっき鋼板の合金層組成と加工性（耐パウダリング性）
の関係を調査したところ特定条件をみたす合金層組成の
蒸着亜鉛めっき鋼板がすぐれた加工性を有することを見
いだした。In view of the above situation, the present inventors have considered the alloy layer composition and workability (powdering resistance) of alloyed vacuum-deposited galvanized steel sheet.
As a result of investigating the relationship, it was found that the vapor-deposited galvanized steel sheet having an alloy layer composition satisfying specific conditions has excellent workability.
一般に亜鉛めっき鋼板を加熱する時に、Fe−Zn合金のζ
相（ＦｅＺｎ13），δ１相（ＦｅＺｎ７），Г相（Ｆｅ
３Ｚｎ10）が順次生成する。そしてそれらの相は強度特
性を異にし、その生成割合は生成合金層の加工性に影響
する。Generally, when heating a galvanized steel sheet, ζ of the Fe-Zn alloy is
Phase (FeZn 13 ), δ 1 phase (FeZn 7 ), Γ phase (Fe
3 Zn 10 ) is sequentially generated. The phases have different strength characteristics, and the generation ratio thereof affects the workability of the generated alloy layer.
これらの相は合金表面をＸ線回析法によって分析する場
合、ζ相は格子間隔ｄ＝2.15Åにおけるピーク、δ１相
は格子間隔ｄ＝2.14Åにおけるピーク、Г相は格子間隔
ｄ＝2.60Åにおけるピークとして検出され、そのバック
グラウンド値との差がその量を代表する。When analyzing the alloy surface by an X-ray diffraction method, these phases have a peak at the lattice spacing d = 2.15Å for the ζ phase, a peak at the lattice spacing d = 2.14Å for the δ 1 phase, and a lattice spacing d = 2.60 for the Γ phase. It is detected as a peak in Å and its difference from the background value represents the amount.
本発明者らはFe−Znの合金層の組成のことなる合金化真
空蒸着亜鉛めっき鋼板を調整し、Ｘ線回折による合金層
組成と加工性（耐パウダリング性）の関係を調査した。The present inventors prepared alloyed vacuum-deposited galvanized steel sheets having different Fe-Zn alloy layer compositions, and investigated the relationship between alloy layer composition by X-ray diffraction and workability (powdering resistance).
その結果、合金化真空蒸着亜鉛めっき鋼板では合金化電
気亜鉛めっき鋼板に比べて、ζ相の多い合金層が得ら
れ、ζ相とδ１相、Г相の量的割合を限定することによ
って優れた加工性を有する合金化真空蒸着亜鉛めっき鋼
板の得られることを見いだした。As a result, the alloyed vacuum-deposited galvanized steel sheet produces an alloy layer with more ζ phase than the alloyed electrogalvanized steel sheet, which is excellent by limiting the quantitative ratio of ζ phase to δ 1 phase, Γ phase. It has been found that an alloyed vacuum-deposited galvanized steel sheet having excellent workability can be obtained.
〈発明の構成〉 本発明によれば、合金化真空蒸着亜鉛めっき鋼板であっ
て、その表面の合金層組織がζ相（ＦｅＺｎ13），δ１
相（ＦｅＺｎ７）およびГ相（Ｆｅ３Ｚｎ10）からな
り，当該合金層が，格子間隔ｄ＝2.15Åにおけるζ相
（ＦｅＺｎ13）のＸ線回折ピーク強度とバックグラウン
ドとの差のＩ１，格子間隔ｄ＝2.14Åにおけるδ１相
（ＦｅＺｎ７）のＸ線回析ピーク強度とバックグラウン
ドとの差をＩ２，格子間隔ｄ＝2.60ÅにおけるГ相（Ｆ
ｅ３Ｚｎ10）のＸ線回析ピーク強度とバックグラウンド
との差をＩ３とするとき， で表わされるＡが4.0以下である合金化真空蒸着亜鉛め
っき鋼板が提供される。<Structure of the Invention> According to the present invention, an alloyed vacuum vapor deposition galvanized steel sheet having an alloy layer structure on its surface of ζ phase (FeZn 13 ), δ 1
Phase (FeZn 7 ) and Γ phase (Fe 3 Zn 10 ) and the alloy layer has a difference I 1 between the X-ray diffraction peak intensity and the background of the ζ phase (FeZn 13 ) at the lattice spacing d = 2.15Å. , The difference between the X-ray diffraction peak intensity of the δ 1 phase (FeZn 7 ) at the lattice spacing d = 2.14Å and the background is I 2 , and the Γ phase at the lattice spacing d = 2.60Å (F
When the difference between the X-ray diffraction peak intensity of e 3 Zn 10 ) and the background is I 3 , An alloyed vacuum-deposited galvanized steel sheet having A of 4.0 or less is provided.
ζ相は比較的軟らかい性質を有し、その相を有する合金
化蒸着亜鉛めっき鋼板は加工性（耐パウダリング性）に
優れている。そしてζ相量はＡの値が４以下においてそ
の性能が達成される。The ζ phase has a relatively soft property, and the alloyed vapor-deposited galvanized steel sheet having the phase is excellent in workability (powdering resistance). The performance of the ζ-phase amount is achieved when the value of A is 4 or less.
本発明の合金化蒸着亜鉛めっき鋼板は一般に日新製鋼技
報No.51(1984)p.93に記載されているような既知の方法
によって製造された真空蒸着亜鉛めっき鋼板に対し，め
っき後にバーナー加熱方式，電気抵抗加熱方式或いは誘
導加熱方式等を適用して加熱することによって製造でき
るが、 の条件は試行錯誤的に定められる。いずれにしてもＡ≦
４の組織を有する合金化蒸着亜鉛めっき鋼は製造された
ことがない。The alloyed vapor-deposited galvanized steel sheet of the present invention is generally used for the vacuum-deposited galvanized steel sheet produced by the known method as described in Nisshin Steel Technical Report No. 51 (1984) p. It can be manufactured by applying a heating method, electric resistance heating method or induction heating method, The condition of is determined by trial and error. In any case, A ≦
No alloyed vapor-deposited galvanized steel having a structure of 4 has been produced.
〈発明の具体的開示〉 以下実施例によって本発明の実施態様を開示する。<Specific Disclosure of the Invention> The embodiments of the present invention will be disclosed below with reference to Examples.
日新製鋼技報No.51(1984)p.94に記載されているような
既知の、前処理用ガス還元焼純炉を有する連続式真空蒸
着亜鉛めっき装置を用いて、板厚0.6mm、板幅300mm、付
着量40ｇ／m2の真空蒸着亜鉛めっき鋼板を作製した。こ
のめっき鋼板を冷延鋼板の焼鈍に用いられているバーナ
ー加熱方式の焼鈍炉でN2雰囲気中で表１に示す条件で合
金化処理し、CoKaによるＸ線回折と加工性の調査を行っ
た。加工性（パウダリング性）は１mm半径で３０°曲げ
た後、これを曲げもどし、曲げ部内側のパウダリング状
態によって評価した。Known, as described in Nisshin Steel Technical Report No. 51 (1984) p.94, using a continuous vacuum vapor deposition galvanizing apparatus having a pretreatment gas reduction firing pure furnace, plate thickness 0.6 mm, A vacuum-deposited galvanized steel sheet having a plate width of 300 mm and an adhesion amount of 40 g / m 2 was produced. This plated steel sheet was alloyed in a burner heating type annealing furnace used for annealing cold-rolled steel sheet under the conditions shown in Table 1 in N 2 atmosphere, and X-ray diffraction by Co Ka and investigation of workability were conducted. It was The workability (powderability) was evaluated by bending the inner surface of the bent portion after bending 30 ° with a radius of 1 mm and bending back.
この評価は，上記の各鋼板から幅20mm，長さ50mmの試験
片を切り出し，この試験片を１mm半径で30°に曲げたあ
と元の平板状に曲げ戻し，該曲げ部の内側にセロハンテ
ープを貼付けたあと，これを剥がし，セロハンテープに
付着した合金量を目視で判定して次の三段階の評価基準
に分類した。In this evaluation, a test piece with a width of 20 mm and a length of 50 mm was cut out from each of the above steel plates, the test piece was bent at a radius of 1 mm to 30 ° and then bent back to the original flat plate shape, and cellophane tape was placed inside the bent part. After sticking, it was peeled off, and the amount of alloy adhered to the cellophane tape was visually judged and classified into the following three grades.
良：該テープへの付着なし（あっても無視できる程度に
微量） やや不良：少量の合金層が付着 不良：多量の合金層が付着 表１の結果から明らかなように，本発明で規定するＡ値
が４以下の真空蒸着亜鉛めっき鋼板では耐パウダリング
性はすべて「良」と判定された。これに対し，Ａ値が6.
5以上の比較例のものの耐パウダリング性は「やや不
良」からＡ値の増加につれて「不良」と判定された。Good: No adhesion to the tape (even if there is a negligible amount) Somewhat poor: A small amount of alloy layer is adhered Poor: A large amount of alloy layer is adhered. As is clear from the results in Table 1, it is defined in the present invention. In the vacuum-deposited galvanized steel sheet having an A value of 4 or less, the powdering resistance was determined to be “good”. On the other hand, the A value is 6.
The powdering resistance of the comparative examples of 5 or more was judged as "poor" from "slightly bad" as the A value increased.
Claims (1)
その表面の合金層組織がζ相（ＦｅＺｎ13），δ１相
（ＦｅＺｎ７）およびГ相（Ｆｅ３Ｚｎ10）からなり，
当該合金層が，格子間隔ｄ＝2.15Åにおけるζ１相（Ｆ
ｅＺｎ13）のＸ線回折ピーク強度とバックグラウンドと
の差をＩ１，格子間隔ｄ＝2.14Åにおけるδ１相（Ｆｅ
Ｚｎ７）のＸ線回折ピーク強度とバックグラウンドとの
差をＩ２，格子間隔ｄ＝2.60ÅにおけるГ相（Ｆｅ３Ｚ
ｎ10）のＸ線回折ピーク強度とバックグラウンドとの差
をＩ３とするとき， で表されるＡが4.0以下のものである合金化真空蒸着亜
鉛めっき鋼板。1. An alloyed vacuum-deposited galvanized steel sheet, comprising:
The alloy layer structure on the surface is composed of ζ phase (FeZn 13 ), δ 1 phase (FeZn 7 ) and Γ phase (Fe 3 Zn 10 ),
The alloy layer has a ζ 1 phase (F at lattice spacing d = 2.15Å).
The difference between the X-ray diffraction peak intensity of eZn 13 ) and the background is I 1 , and the δ 1 phase (Fe) at the lattice spacing d = 2.14Å
The difference between the X-ray diffraction peak intensity of Zn 7 ) and the background is I 2 , and the Γ phase (Fe 3 Z) at the lattice spacing d = 2.60Å
When the difference between the X-ray diffraction peak intensity of n 10 ) and the background is I 3 , An alloyed vacuum-deposited galvanized steel sheet having A of 4.0 or less represented by.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61008107A JPH0639686B2 (en) | 1986-01-20 | 1986-01-20 | Alloyed vacuum-deposited zinc plated steel plate with excellent workability |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP61008107A JPH0639686B2 (en) | 1986-01-20 | 1986-01-20 | Alloyed vacuum-deposited zinc plated steel plate with excellent workability |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS62167870A JPS62167870A (en) | 1987-07-24 |
| JPH0639686B2 true JPH0639686B2 (en) | 1994-05-25 |
Family
ID=11684071
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP61008107A Expired - Lifetime JPH0639686B2 (en) | 1986-01-20 | 1986-01-20 | Alloyed vacuum-deposited zinc plated steel plate with excellent workability |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0639686B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19527515C1 (en) * | 1995-07-27 | 1996-11-28 | Fraunhofer Ges Forschung | Corrosion-resistant steel sheet prodn., e.g. for the automobile industry |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57131361A (en) * | 1981-02-09 | 1982-08-14 | Mitsubishi Heavy Ind Ltd | Zinc plating method by multi-stages vapor deposition |
-
1986
- 1986-01-20 JP JP61008107A patent/JPH0639686B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS62167870A (en) | 1987-07-24 |
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