JPH079055B2 - Method for producing galvannealed steel sheet - Google Patents
Method for producing galvannealed steel sheetInfo
- Publication number
- JPH079055B2 JPH079055B2 JP2038176A JP3817690A JPH079055B2 JP H079055 B2 JPH079055 B2 JP H079055B2 JP 2038176 A JP2038176 A JP 2038176A JP 3817690 A JP3817690 A JP 3817690A JP H079055 B2 JPH079055 B2 JP H079055B2
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- alloying
- alloyed
- galvanized steel
- pickling
- 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
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Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、合金化亜鉛めっき鋼板の製造方法に関するも
のである。TECHNICAL FIELD The present invention relates to a method for manufacturing an alloyed galvanized steel sheet.
（従来の技術） Ｐを添加した亜鉛めっき鋼板の合金化速度は、例えば、
特開昭62-139860号公報の如くめっき鋼板表面にリンを
被覆せしめ、次いで溶融亜鉛めっきを施すことでめっき
層密着性の優れた溶融亜鉛めっき鋼板とすることができ
るとして、Ｐによって合金化速度が遅くなり、密着性を
損なうΓ相を少なくすることができ、言い換えれば、合
金化を損なうことが開示されている。(Prior Art) The alloying rate of a galvanized steel sheet containing P is, for example,
As described in JP-A-62-139860, by coating the surface of a plated steel sheet with phosphorus and then performing hot dip galvanizing, it is possible to obtain a hot dip galvanized steel sheet with excellent adhesion to the plating layer. It is disclosed that it is possible to reduce the Γ phase, which slows the adhesion, and impairs the adhesiveness, in other words, impairs alloying.
このように、Ｐを添加することで合金化が遅くなるため
に、合金化亜鉛めっき鋼板の合金化の向上が強く要求さ
れている。As described above, the addition of P slows the alloying, so that the improvement of alloying of the galvannealed steel sheet is strongly demanded.
（発明が解決しようとする課題） 本発明はこのような要求を有利に満足するためなされた
もので、通板速度の向上とめっき密着性、パウダリング
性、加工性、耐食性に優れた合金化亜鉛めっき鋼板の製
造方法を提供するものである。(Problems to be Solved by the Invention) The present invention has been made in order to advantageously satisfy such requirements, and it is an alloying material that is excellent in the improvement of the strip running speed and the plating adhesion, powdering property, workability, and corrosion resistance. A method for manufacturing a galvanized steel sheet is provided.
（課題を解決するための手段） 本発明は、Ｐを0.025〜0.2％含有するＰ添加鋼板を焼鈍
した後、酸洗後、加熱処理し、亜鉛めっき後、合金化を
行うことを特徴とする合金化亜鉛めっき鋼板の製造方法
である。(Means for Solving the Problem) The present invention is characterized in that after P-added steel sheet containing 0.025 to 0.2% of P is annealed, it is pickled, then heat-treated, galvanized and then alloyed. It is a method of manufacturing an alloyed galvanized steel sheet.
本発明の対象とする亜鉛めっき鋼板は、Ｐを0.025％以
上意図的に添加した鋼を熱延、酸洗、冷延、亜鉛めっ
き、合金化を行う合金化亜鉛めっき鋼板であり、その他
の成分は特に規定しない。例えば、溶融亜鉛めっき鋼板
（亜鉛または亜鉛を主体とするNi,Pb,Cr等の合金めっき
を施したものを含む）を加熱合金化した鋼板であり、合
金化を施す鉄‐亜鉛合金電気亜鉛めっき鋼板を加熱合金
化した鋼板、蒸着亜鉛めっき鋼板を加熱合金化した鋼板
等の合金化亜鉛めっき鋼板の製造方法である。The galvanized steel sheet targeted by the present invention is an alloyed galvanized steel sheet for hot rolling, pickling, cold rolling, galvanizing and alloying steel with intentionally added P of 0.025% or more, and other components. Is not specified. For example, hot-dip galvanized steel sheets (including zinc or alloys mainly containing zinc such as Ni, Pb, and Cr) are heat-alloyed steel sheets, and iron-zinc alloy electrogalvanized It is a method for producing an alloyed zinc-plated steel sheet such as a steel sheet obtained by heat-alloying a steel sheet or a vapor-deposited galvanized steel sheet.
本発明者らは、亜鉛めっき鋼板の種類の如何によらず、
Ｐを0.025％以上添加した鋼板の合金化速度を速くする
ことは、熱延鋼板のスケールの酸洗前の部分的な剥離を
防止することにより、Ｐの鋼板の表面への濃化が抑制さ
れ、合金化速度を大幅に改善することを見出した。The present inventors, regardless of the type of galvanized steel sheet,
Increasing the alloying rate of a steel sheet with P added in an amount of 0.025% or more prevents partial peeling of the scale of the hot-rolled steel sheet before pickling, thereby suppressing the enrichment of P on the surface of the steel sheet. , Found that the alloying rate was significantly improved.
従来の上記めっき鋼板においては、Ｐを0.025％以上含
有する鋼板の合金化速度は鋼板の通板速度を例えば、35
m/minと極端に遅くしないと合金化を完了せず、いわゆ
る生焼けの状態となり、合金化亜鉛めっき鋼板とならな
いことがある。In the conventional plated steel sheet described above, the alloying rate of a steel sheet containing 0.025% or more of P is, for example, 35
If it is not extremely slowed down to m / min, alloying will not be completed, and a so-called baked state will occur, and an alloyed galvanized steel sheet may not be obtained.
本発明者らは合金化亜鉛めっき鋼板の合金化速度を改善
するために、種々の実験を重ねた結果、たとえば、少量
の添加で高強度鋼板とすることができるＰを0.025以上
意図的に添加した鋼板（一般には、0.025〜0.2％のＰを
添加することにより高強度鋼板とする）を焼鈍した後、
酸洗し、結晶粒界に濃化したＰを除去後、加熱処理し、
次いで亜鉛めっきし、合金化を行うときの合金化速度が
改善することを見い出した。The present inventors have conducted various experiments in order to improve the alloying rate of the alloyed galvanized steel sheet, and as a result, for example, 0.025 or more of P, which can be a high-strength steel sheet with a small amount of addition, is intentionally added. After annealing the steel sheet (generally, a high strength steel sheet by adding 0.025 to 0.2% of P),
After pickling and removing P concentrated in the crystal grain boundaries, heat treatment,
It was then galvanized and found to improve the alloying rate when alloying.
酸洗としてはHCl,H2SO4等を用いることができるが、HCl
の場合は、濃度を１〜５％とし、１％未満では酸洗時間
が長くなり、設備的に大型となり、経済的に不利だから
であり、５％を超えた浴では、結晶粒界のみの溶解でな
く、全面的に溶解し、Ｐの濃化した粒界を溶解すること
の意義が損なわれ、HClの原単位が高くつき、しかも、
地鉄の溶解量が多くなり不利である。HCl, H 2 SO 4, etc. can be used for pickling.
In the case of, the concentration is 1 to 5%, and if it is less than 1%, the pickling time becomes long, the equipment becomes large, and it is economically disadvantageous. It does not dissolve, but dissolves entirely, impairing the meaning of dissolving the grain boundary where P is concentrated, and the basic unit of HCl is high, and moreover,
It is disadvantageous because the amount of base metal dissolved increases.
また、浴温は60〜90℃とし、60℃未満では、上記HCl濃
度では、溶解が遅くなり、又90℃を超えて温度を高くす
ると、結晶粒界のみの溶解でなく、全面的に溶解し、Ｐ
の濃化した粒界を溶解することの意義が損なわれること
があり好ましくない。Further, the bath temperature is 60 to 90 ° C, and when the temperature is lower than 60 ° C, the dissolution is slow at the above HCl concentration, and when the temperature is higher than 90 ° C, the temperature is not only dissolved at the crystal grain boundaries but completely dissolved. Then P
It is not preferable since the significance of dissolving the concentrated grain boundaries of is impaired.
さらに、時間は１〜10secとし、1sec未満では溶解がで
きないためであり、10sec超では地鉄の溶解量が多くな
る。Further, the time is set to 1 to 10 seconds, and if the time is less than 1 second, the dissolution is impossible.
このように焼鈍した後、HCl:1〜５％の酸洗液で、浴温:
60〜90℃で１〜10sec間酸洗して、結晶粒界に濃化した
Ｐを除去することで亜鉛めっき、合金化を行うときの合
金化速度が改善することができる。又他の酸洗浴におい
ても濃度、温度、時間を調整することにより、濃化Ｐを
確実に除去し、合金化速度を改善できる。After annealing in this way, HCl: 1-5% pickling solution, bath temperature:
By pickling at 60 to 90 ° C. for 1 to 10 seconds to remove the P concentrated in the crystal grain boundaries, the alloying rate at the time of galvanizing and alloying can be improved. Also in other pickling baths, by adjusting the concentration, temperature and time, the concentrated P can be surely removed and the alloying rate can be improved.
このように、合金化速度を改善するＰの表面の粒界の低
減は、焼鈍で結晶粒界が形成された後、適正な酸洗条件
で酸洗することにより実現され、冷延ままの鋼板を酸洗
しても、冷延歪が大きいために、特定の個所、たとえば
元の結晶粒界から溶解されることはなく、平均的に表面
が溶解するのみでＰの低減効果が少ない。As described above, the reduction of grain boundaries on the surface of P that improves the alloying rate is realized by pickling under appropriate pickling conditions after the grain boundaries are formed by annealing, and the steel sheet is as cold-rolled. Even if the steel is pickled, the cold rolling strain is large, so that it is not dissolved from a specific portion, for example, the original crystal grain boundary, and only the surface is melted on average, and the effect of reducing P is small.
かかる合金化速度を抑制する要因として、鋼中にＰが多
く存在することにより、特に結晶粒界に存在すること
で、合金化時のFeの移動を妨害し、合金化速度を遅くす
ると考えられる。その他、C,N等の固溶体元素が悪影響
をおよぼすと考えられる。このように、Ｐをはじめとす
る固溶体元素を低減することが合金化速度を向上するこ
とに有効である。As a factor that suppresses the alloying rate, it is considered that the presence of a large amount of P in the steel, particularly the presence of P in the grain boundaries, interferes with the movement of Fe during alloying and slows the alloying rate. . In addition, solid solution elements such as C and N are considered to have an adverse effect. Thus, reducing the solid solution elements such as P is effective in improving the alloying rate.
そのために、特にＰの表面の粒界への濃化を表面濃化の
過程を問わず、抑制することが合金化速度向上の鍵とい
える。Therefore, it can be said that suppressing the concentration of P on the grain boundaries on the grain boundary regardless of the surface concentration process is the key to improving the alloying speed.
上記のごとく、焼鈍した鋼板をHCl濃度と浴温を変化し
て3sec間酸洗した後、溶融亜鉛めっき、合金化を行った
ときの鋼板の合金化速度は第１図に示すとおり、HCl濃
度と浴温を最適にするとき、粒界粒界が溶解され、Ｐ濃
度が低減し、合金化速度が改善されることを示す。As described above, the annealed steel sheet is subjected to pickling for 3 seconds while changing the HCl concentration and bath temperature, and then the galvanizing and alloying rate of the steel sheet is shown in Fig. 1. It is shown that when the bath temperature is optimized, the grain boundaries are dissolved, the P concentration is reduced, and the alloying rate is improved.
つまり、合金化亜鉛めっき鋼板とするための限界の通板
速度は速くなる傾向を示す。このように、合金化亜鉛め
っき鋼板の合金化速度はHCl濃度と浴温を最適にして、
結晶粒界を溶解し、Ｐ濃度を低減することで、合金化速
度が容易に改善されることが明らかである。That is, the sheet passing speed, which is the limit for producing an alloyed galvanized steel sheet, tends to increase. In this way, the alloying rate of the galvannealed steel sheet is optimized by adjusting the HCl concentration and bath temperature,
It is clear that the alloying rate is easily improved by melting the grain boundaries and reducing the P concentration.
第１図の諸元は次の通りであった。The specifications of FIG. 1 were as follows.
Ｐ添加量:0.04％ めっき：両面AS 目付量:60〜60（g/m2） 合金化板温:480℃×5sec 焼鈍後の酸洗時間:3sec このように酸洗すると鋼板は、表面に不純物が付着する
ので、例えば、連続溶融亜鉛めっきの場合は、ラインの
前処理炉で加熱処理により除去し、表面清浄化した後、
めっきに好適な温度に調整しめっき浴へ導く。この加熱
は、前記焼鈍後スキンパス等で処理した場合は、再結晶
温度になると、結晶が粗大化し好ましくないので、この
ような場合は、再結晶温度以下で加熱処理する。又焼鈍
後スキンパス等で処理しなかった場合は、再結晶温度に
達する加熱処理でも、結晶粒はほとんど粗大化しないの
で、加熱処理は、再結晶温度又は再結晶温度未満でもよ
い。Amount of P added: 0.04% Plating: Double-sided AS Area weight: 60 to 60 (g / m 2 ) Alloyed plate temperature: 480 ° C × 5 sec Pickling time after annealing: 3 sec When the steel is pickled like this Since impurities adhere, for example, in the case of continuous hot-dip galvanizing, after removing by heat treatment in a pretreatment furnace of the line, after surface cleaning,
The temperature is adjusted to a temperature suitable for plating and the solution is introduced into the plating bath. When this heating is performed by a skin pass or the like after the annealing, the crystal becomes coarse at the recrystallization temperature, which is not preferable. In such a case, the heating is performed at the recrystallization temperature or lower. Further, when the treatment is not performed by skin pass after annealing, the heat treatment may be performed at a recrystallization temperature or lower than the recrystallization temperature because the crystal grains are hardly coarsened even by the heat treatment reaching the recrystallization temperature.
次に電気又は蒸着めっき等溶融めっき以外の場合は、酸
洗後水洗等により表面清浄化後、めっきを施すものであ
る。Next, in the case other than hot dipping such as electric or vapor deposition plating, the surface is cleaned by pickling and then washing with water, and then plating is performed.
しかして、例えば前記の如き合金化亜鉛めっき鋼板の合
金化速度、つまり、合金化亜鉛めっき鋼板製造ラインの
通板速度を改善する方法としては、焼鈍した鋼板をHCl
濃度と浴温を最適にするとき結晶粒界が溶解され、Ｐ濃
度が低減することで、合金化亜鉛めっき鋼板製造ライン
の通板速度を改善することができる。Thus, for example, as a method of improving the alloying rate of the alloyed galvanized steel sheet as described above, that is, the method of improving the threading speed of the alloyed galvanized steel sheet production line, the annealed steel sheet is treated with HCl.
When the concentration and the bath temperature are optimized, the grain boundaries are melted and the P concentration is reduced, so that the passing speed of the alloyed galvanized steel sheet production line can be improved.
その具体的な方法としては、例えば連続焼鈍ラインで焼
鈍した鋼板をHCl濃度３％、浴温70℃で3sec間の酸洗を
行った鋼板を溶融亜鉛めっき、合金化を行い、合金化の
板温480℃で5secとなる通板速度を90m/minとして通板す
ることができ、合金化速度を改善することが確実に達成
できる。As a specific method, for example, a steel sheet annealed in a continuous annealing line is hot-dipped by galvanizing and alloying a steel sheet that has been subjected to pickling at a HCl concentration of 3% and a bath temperature of 70 ° C for 3 seconds. It is possible to pass the strip at a speed of 5 seconds at a temperature of 480 ° C of 90 m / min, and it is possible to reliably improve the alloying rate.
勿論、焼鈍は連続焼鈍だけでなく、箱型焼鈍でもよく、
酸洗は単独のラインでもよく、その方法は問わない。ま
たは、溶融亜鉛めっき鋼板をライン外で、合金化処理を
行うとき、鉄‐亜鉛合金電気亜鉛めっき鋼板を合金化す
るとき、蒸着亜鉛めっき鋼板を合金化するときにも適用
できる。Of course, the annealing may be not only continuous annealing but also box annealing,
The pickling may be performed in a single line, and the method is not limited. Alternatively, it can be applied also when performing an alloying treatment on a hot-dip galvanized steel sheet outside the line, when alloying an iron-zinc alloy electrogalvanized steel sheet, and when alloying a vapor-deposited galvanized steel sheet.
（実施例） 本発明の実施例を比較的とともに第１表に挙げる。Examples Examples of the present invention are given in Table 1 along with comparative examples.
注1:鋼種 ・Nb-Ti-SULC:超極低炭素鋼でNb-Tiを添加したもの。 Note 1: Steel type ・ Nb-Ti-SULC: Ultra-low carbon steel with Nb-Ti added.
・T-SULC:超極低炭素鋼でTiを添加したもの。・ T-SULC: Ultra-low carbon steel with Ti added.
・Al-k:アルミキルド低炭素鋼。・ Al-k: Aluminum killed low carbon steel.
注2:焼鈍 ・A:連続焼鈍（750℃） ・B:箱型焼鈍（690℃） 注3:めっき鋼板の種類 ・両面AS:両面の合金化溶融亜鉛めっき鋼板。（60g/m2/
60g/m2） ・片面AS:片面の合金化溶融亜鉛めっき鋼板。（45g/m2/
0） ・電気AS:電気亜鉛めっき鋼板を合金化処理したもの。
（30g/m2/30g/m2） ・蒸着AS:蒸着亜鉛めっき鋼板を合金化処理したもの。
（30g/m2/30g/m2） 注4:合金化処理温度 ・合金化処理を行うときの板温。Note 2: Annealing ・ A: Continuous annealing (750 ℃) ・ B: Box-type annealing (690 ℃) Note 3: Type of coated steel sheet ・ Double-sided AS: Double-sided galvannealed steel sheet. (60g / m 2 /
60g / m 2 ) ・ One side AS: One side alloy galvanized steel sheet. (45g / m 2 /
0) ・ Electricity AS: Electrogalvanized steel sheet alloyed.
(30g / m 2 / 30g / m 2 ) ・ Vapor-deposited AS: An alloyed galvanized steel sheet.
(30g / m 2 / 30g / m 2 ) Note 4: Alloying temperature ・ Sheet temperature during alloying.
注5:合金化処理時間 ・合金化処理を行うときの合金化処理温度に保持される
時間。Note 5: Alloying treatment time ・ Time during which the alloying treatment temperature is maintained during alloying treatment.
注6:亜鉛めっき鋼板ラインの通板速度 ・合金化処理を行う亜鉛めっき鋼板ラインの通板速度で
合金化可能な限界速度。Note 6: Speed of galvanized steel sheet line-The limit speed that can be alloyed at the speed of galvanized steel sheet line for alloying treatment.
注7:合金化溶融亜鉛めっきにおいては、鋼板を酸洗後60
0℃で加熱し、表面の付着不純物を除去し、次いでめっ
きに好適な温度に調整してめっき浴へ導いた。Note 7: In galvannealing, 60% after pickling the steel sheet
It was heated at 0 ° C. to remove adhered impurities on the surface, then adjusted to a temperature suitable for plating, and introduced into a plating bath.
電気亜鉛めっき、蒸着亜鉛めっきにおいては、鋼板を酸
洗後水洗し表面の付着不純物を除去し清浄化して、めっ
きを施した。In electrogalvanizing and vapor deposition galvanizing, a steel sheet was pickled and then washed with water to remove impurities adhering to the surface and cleaned, and then plated.
（発明の効果） 本発明により、合金化亜鉛めっき鋼板の製造において、
Ｐ添加の合金化速度つまり、合金化亜鉛めっき鋼板の製
造時の通板速度を向上することができ、かつ合金化亜鉛
めっき鋼板に要求される諸特性、めっき密着生、パウダ
リング性、加工性、耐蝕性等の効果が得られる。(Effect of the invention) According to the present invention, in the production of an alloyed galvanized steel sheet,
It is possible to improve the alloying rate of P addition, that is, the stripping speed during the production of galvannealed steel sheet, and various characteristics required for galvannealed steel sheet, plating adhesion, powdering property, and workability. The effects such as corrosion resistance can be obtained.
【図面の簡単な説明】 第１図は焼鈍した鋼板の酸洗条件と合金化溶融亜鉛めっ
き鋼板の合金化速度（合金化溶融亜鉛めっき鋼板製造時
の合金化限界通板速度）の関係を示す図表である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows the relationship between the pickling conditions of annealed steel sheets and the alloying rate of alloyed hot-dip galvanized steel sheets (alloying limit threading speed at the time of producing alloyed hot-dip galvanized steel sheets). It is a chart.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｃ２５Ｄ 5/50 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI technical display location C25D 5/50
Claims (2)
鈍し、酸洗処理後、表面清浄化し、次いで亜鉛めっきを
施し、めっき後、加熱合金化処理することを特徴とする
合金化亜鉛めっき鋼板の製造方法。1. An alloying characterized in that a P-added steel sheet containing 0.025 to 0.2% of P is annealed, pickled, surface-cleaned, galvanized, and then heat-alloyed. Manufacturing method of galvanized steel sheet.
酸洗処理することを特徴とする請求項１記載の合金化亜
鉛めっき鋼板の製造方法。2. A method for producing an alloyed galvanized steel sheet according to claim 1, wherein the acid pickling treatment is carried out at a bath temperature of 60 to 90 ° C. for 1 to 10% HCl: 1 to 5%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2038176A JPH079055B2 (en) | 1990-02-21 | 1990-02-21 | Method for producing galvannealed steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2038176A JPH079055B2 (en) | 1990-02-21 | 1990-02-21 | Method for producing galvannealed steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH03243751A JPH03243751A (en) | 1991-10-30 |
| JPH079055B2 true JPH079055B2 (en) | 1995-02-01 |
Family
ID=12518082
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2038176A Expired - Fee Related JPH079055B2 (en) | 1990-02-21 | 1990-02-21 | Method for producing galvannealed steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH079055B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000018976A1 (en) | 1998-09-29 | 2000-04-06 | Kawasaki Steel Corporation | High strength thin steel sheet, high strength alloyed hot-dip zinc-coated steel sheet, and method for producing them |
| JP2006322028A (en) * | 2005-05-18 | 2006-11-30 | Nippon Steel Corp | Hot dip galvanizing method for p-added steel sheet |
| US10023931B2 (en) | 2006-04-07 | 2018-07-17 | Nippon Steel & Sumitomo Metal Corporation | Method of production of hot dip galvannealed steel sheet with excellent workability, powderability, and slidability |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5677005A (en) * | 1993-06-25 | 1997-10-14 | Kawasaki Steel Corporation | Method for hot dip galvanizing high tensile steel strip with minimal bare spots |
| JP3435255B2 (en) * | 1995-05-30 | 2003-08-11 | 新日本製鐵株式会社 | Manufacturing equipment for electro-galvanized steel sheet with excellent lubricity |
| JPH08325790A (en) * | 1995-05-31 | 1996-12-10 | Nippon Steel Corp | Equipment for production of electrogalvanized hot rolled sheet having excellent lubricity |
| ATE188260T1 (en) * | 1996-08-30 | 2000-01-15 | Balcke Duerr Gmbh | HOT DIP GALVANIZING PROCESS |
| US8303739B2 (en) | 2005-04-20 | 2012-11-06 | Nippon Steel Corporation | Method for producing high-strength hot-dip galvannealed steel sheet |
| JP4757622B2 (en) * | 2005-12-20 | 2011-08-24 | 新日本製鐵株式会社 | Method for producing alloyed hot-dip galvanized steel with excellent appearance quality |
| DE102008005605A1 (en) * | 2008-01-22 | 2009-07-23 | Thyssenkrupp Steel Ag | Process for coating a 6-30% by weight Mn-containing hot or cold rolled flat steel product with a metallic protective layer |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5858264A (en) * | 1981-10-03 | 1983-04-06 | Nisshin Steel Co Ltd | Production of low yield ratio and high tensile hot dipped steel plate with zinc |
-
1990
- 1990-02-21 JP JP2038176A patent/JPH079055B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2000018976A1 (en) | 1998-09-29 | 2000-04-06 | Kawasaki Steel Corporation | High strength thin steel sheet, high strength alloyed hot-dip zinc-coated steel sheet, and method for producing them |
| JP2006322028A (en) * | 2005-05-18 | 2006-11-30 | Nippon Steel Corp | Hot dip galvanizing method for p-added steel sheet |
| JP4510697B2 (en) * | 2005-05-18 | 2010-07-28 | 新日本製鐵株式会社 | P-added steel sheet galvannealed alloying method |
| US10023931B2 (en) | 2006-04-07 | 2018-07-17 | Nippon Steel & Sumitomo Metal Corporation | Method of production of hot dip galvannealed steel sheet with excellent workability, powderability, and slidability |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH03243751A (en) | 1991-10-30 |
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