JPH01177348A - Manufacture of thickness differential alloying hot dip galvanized steel sheet - Google Patents
Manufacture of thickness differential alloying hot dip galvanized steel sheetInfo
- Publication number
- JPH01177348A JPH01177348A JP10088A JP10088A JPH01177348A JP H01177348 A JPH01177348 A JP H01177348A JP 10088 A JP10088 A JP 10088A JP 10088 A JP10088 A JP 10088A JP H01177348 A JPH01177348 A JP H01177348A
- Authority
- JP
- Japan
- Prior art keywords
- steel sheet
- dip galvanized
- galvanized steel
- hot dip
- alloying
- 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.)
- Granted
Links
- 229910001335 Galvanized steel Inorganic materials 0.000 title claims abstract description 24
- 239000008397 galvanized steel Substances 0.000 title claims abstract description 24
- 238000005275 alloying Methods 0.000 title claims abstract description 19
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 13
- 238000007747 plating Methods 0.000 claims abstract description 32
- 239000011248 coating agent Substances 0.000 claims abstract description 22
- 238000000576 coating method Methods 0.000 claims abstract description 22
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 21
- 239000010959 steel Substances 0.000 claims abstract description 21
- 238000000137 annealing Methods 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000010438 heat treatment Methods 0.000 claims abstract description 9
- 238000005246 galvanizing Methods 0.000 claims abstract description 8
- 239000011701 zinc Substances 0.000 claims abstract description 8
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 8
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 7
- 229910001096 P alloy Inorganic materials 0.000 claims abstract description 4
- 230000001376 precipitating effect Effects 0.000 claims abstract description 4
- 238000000227 grinding Methods 0.000 abstract description 10
- 238000009713 electroplating Methods 0.000 abstract description 2
- 230000001105 regulatory effect Effects 0.000 abstract description 2
- PXHVJJICTQNCMI-UHFFFAOYSA-N nickel Substances [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 11
- 238000004070 electrodeposition Methods 0.000 description 6
- 125000002091 cationic group Chemical group 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- KRKNYBCHXYNGOX-UHFFFAOYSA-N citric acid Chemical compound OC(=O)CC(O)(C(O)=O)CC(O)=O KRKNYBCHXYNGOX-UHFFFAOYSA-N 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000000243 solution Substances 0.000 description 3
- 238000002845 discoloration Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000001737 promoting effect Effects 0.000 description 2
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 description 1
- 229910021586 Nickel(II) chloride Inorganic materials 0.000 description 1
- 229910019142 PO4 Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- -1 and after degreasing Substances 0.000 description 1
- KGBXLFKZBHKPEV-UHFFFAOYSA-N boric acid Chemical compound OB(O)O KGBXLFKZBHKPEV-UHFFFAOYSA-N 0.000 description 1
- 239000004327 boric acid Substances 0.000 description 1
- 239000010960 cold rolled steel Substances 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000005238 degreasing Methods 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 238000007654 immersion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- QMMRZOWCJAIUJA-UHFFFAOYSA-L nickel dichloride Chemical compound Cl[Ni]Cl QMMRZOWCJAIUJA-UHFFFAOYSA-L 0.000 description 1
- LGQLOGILCSXPEA-UHFFFAOYSA-L nickel sulfate Chemical compound [Ni+2].[O-]S([O-])(=O)=O LGQLOGILCSXPEA-UHFFFAOYSA-L 0.000 description 1
- 229910000363 nickel(II) sulfate Inorganic materials 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
- 239000002987 primer (paints) Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Landscapes
- Coating With Molten Metal (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
この発明は自動車用鋼板として優れた特性を有する差厚
合金化溶融亜鉛めっき鋼板の製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to a method for producing a differential thickness alloyed hot-dip galvanized steel sheet having excellent properties as a steel sheet for automobiles.
（従来の技術）
自動車用鋼板として、従来より合金化溶融亜鉛めっき鋼
板が用いられている。この場合の問題として、プレス加
工を行う場合に、パウダリングと呼ばれるめっきはく離
が起こりやすい。パウダリングはめっき層中のＦｅ濃度
に依存する特性であり、良好なパウダリング性を得るに
はＦｅ濃度を適正範囲に制御しなければならない。この
ためたとえば特開昭６１−２２３１７４号公報にみられ
るように一般には合金化加熱条件を規制している。(Prior Art) Alloyed hot-dip galvanized steel sheets have been used as steel sheets for automobiles. A problem in this case is that when press working is performed, plating peeling called powdering tends to occur. Powdering is a characteristic that depends on the Fe concentration in the plating layer, and in order to obtain good powdering properties, the Fe concentration must be controlled within an appropriate range. For this reason, alloying heating conditions are generally regulated, as seen in, for example, Japanese Unexamined Patent Publication No. 61-223174.
しかし加熱条件は鋼板の表裏に等しく作用するため、等
厚めっきでは適正なＦｅ濃度となっても、差厚めつきで
はどちらか一方の面が適正範囲を外れ、その結果耐パウ
ダリング性が劣化したり、合金化不足となりヤケムラと
称する外観不良が生じる。However, since the heating conditions act equally on both the front and back sides of the steel sheet, even if the Fe concentration is appropriate with equal thickness plating, one side will be out of the appropriate range with differential thickness plating, resulting in deterioration of powdering resistance. Otherwise, alloying becomes insufficient, resulting in a defective appearance called discoloration.
また、合金化溶融亜鉛めっき鋼板は、自動車に多用され
るプライマー塗装としてのカチオン電着塗装時に、クレ
ータリングといわれるピンホール状の塗膜欠陥が発生し
やすい。In addition, alloyed hot-dip galvanized steel sheets are susceptible to pinhole-like coating defects called cratering during cationic electrodeposition coating as a primer coating often used in automobiles.
（発明が解決しようとする問題点）
鋼板の両面ともにめっき層中Ｆｅ？ａ度を適正範囲に制
御することにより、耐パウダリング性に優れ、またさら
には電着塗装時にクレータリングを起こさない、差厚合
金化溶融亜鉛めっき鋼板の製造方法を提供することがこ
の発明の目的である。(Problem to be solved by the invention) Is there Fe in the plating layer on both sides of the steel plate? It is an object of the present invention to provide a method for manufacturing a differential thickness alloyed hot-dip galvanized steel sheet that has excellent powdering resistance and does not cause cratering during electrodeposition coating by controlling the degree of a to an appropriate range. It is a purpose.
（問題点を解決するための手段）
発明者らは上記の目的を達成するためには、厚目付側と
なる面におけるＺｎ−Ｆｅ間の合金化反応を促進させ、
Ｆｅの拡散量を薄目付側よりも多くすることに着想し、
Ｚｎ−Ｆｅ合金化反応の促進手段について検討した結果
、溶融亜鉛めっき前の還元焼鈍に先立って、表面に一定
量以上のＮｉを析出させることが有効であることを見出
した。(Means for solving the problem) In order to achieve the above object, the inventors promoted the alloying reaction between Zn and Fe on the thick side,
The idea was to increase the amount of diffusion of Fe than on the lighter basis weight side,
As a result of examining means for accelerating the Zn-Fe alloying reaction, it was found that it is effective to precipitate a certain amount or more of Ni on the surface prior to reduction annealing before hot-dip galvanizing.
さらにまた、差厚合金化溶融亜鉛めっき鋼板の少なくと
も一方の表面にＦｅ−Ｐ合金めっき層を３ｇ／ｍ”以上
施すことにより電着塗装時のクレータリング防止に対し
て有効であることを見出した。Furthermore, we have found that applying an Fe-P alloy plating layer of 3 g/m or more to at least one surface of a differential thickness alloyed hot-dip galvanized steel sheet is effective in preventing cratering during electrodeposition coating. .
このような知見に基づきこの発明は鋼板を還元焼鈍して
表面の酸化皮膜を除去した後、溶融亜鉛めっき浴に浸漬
してめっきを行い、表裏のめっき付着量が異なるように
付着量を調整し、続いて合金化加熱処理を施す差厚合金
化溶融亜鉛めっき鋼板の製造方法において、
還元焼鈍に先立って、亜鉛付着量が厚目付となる片面に
のみ予め０．１ｇ／ｍ”以上のＮｉを析出させること
を特徴とする差厚合金化溶融亜鉛めっき鋼板の製造方法
（第１発明）、
鋼板を還元焼鈍して表面の酸化皮膜を除去した後、溶融
亜鉛めっき浴に浸漬してめっきを行い、表裏のめっき付
着量が異なるように付着量を調整し、続いて合金化加熱
処理を施す差厚合金化溶融亜鉛めっき鋼板の製造方法に
おいて、
還元焼鈍に先立って、亜鉛付着量が厚目付となる片面に
のみ予め０．１ｇ／ｍ”以上のＮｉを析出させること、
上記還元焼鈍に引続く亜鉛めっきのあとの合金化処理に
て得られる合金化溶融亜鉛めっき鋼板表面の少なくとも
一方の面に、Ｆｅ −Ｐ合金めっき層を３ｇ／ｍ２以上
施すこと、
を特徴とする差厚合金化溶融亜鉛めっき鋼板の製造方法
である。Based on this knowledge, the present invention involves reduction annealing a steel sheet to remove the oxide film on the surface, and then plating it by immersing it in a hot-dip galvanizing bath, and adjusting the amount of plating so that the amount of plating on the front and back sides is different. , in a method for manufacturing a differential thickness alloyed hot-dip galvanized steel sheet that is subsequently subjected to alloying heat treatment, prior to reduction annealing, Ni of 0.1 g/m or more is applied in advance only to one side where the zinc coating is thick. A method for manufacturing a differential thickness alloyed hot-dip galvanized steel sheet (first invention), characterized in that a steel sheet is reduced annealed to remove an oxide film on the surface, and then immersed in a hot-dip galvanizing bath to perform plating. , in a method for producing differentially-thickness alloyed hot-dip galvanized steel sheets, in which the coating weight is adjusted so that the coating weight on the front and back sides is different, and then alloying heat treatment is performed. 0.1 g/m" or more of Ni is precipitated only on one side of the alloyed galvanized steel sheet obtained by the alloying treatment after the galvanizing following the reduction annealing. , applying a Fe-P alloy plating layer of 3 g/m2 or more.
（作 用）
この発明において、還元焼鈍前のＮｉ付着量を０．１
ｇ ７ｍ”以上に限定した理由は、これに満たない量で
は合金化反応の促進効果が得られないためである。この
促進効果はＮｉ付着量に対して単調に増大するが、約５
ｇ／ｍ２で飽和する。Ｎｉ付着量をこれ以上増加させて
も弊害はないので、これを上限とする必要はないが、コ
ストの点で実用上５ｇ／ｍ２以下が望ましい。(Function) In this invention, the amount of Ni deposited before reduction annealing is reduced to 0.1
The reason for limiting the amount to 7 m" or more is that the effect of promoting the alloying reaction cannot be obtained with an amount less than this. This promoting effect monotonically increases with the amount of Ni deposited, but
It saturates at g/m2. There is no harm in increasing the amount of Ni deposited more than this, so it is not necessary to set this as an upper limit, but from the viewpoint of cost, it is practically desirable to set it to 5 g/m2 or less.
Ｎｉを鋼板片面に析出させる方法は、特に限定するもの
ではなく、一般に知られている硫酸塩浴、塩化物浴、ア
ルカリ浴などによる、電気めっき法によっても良いし、
Ｎｉ塩水溶液また懸濁液を鋼帯の片面に塗布する方法に
よってもかまわない。また置換反応を利用した無電解Ｎ
ｉめっき液に片面のみが接触するようにして、片面Ｎｉ
めっき処理を施す方法なども採用できる。The method for depositing Ni on one side of the steel sheet is not particularly limited, and may be electroplating using a generally known sulfate bath, chloride bath, alkaline bath, etc.
A method may also be used in which an aqueous Ni salt solution or suspension is applied to one side of the steel strip. In addition, electroless N using substitution reaction
i Make sure that only one side is in contact with the plating solution.
A method of applying plating treatment can also be adopted.
次に電着塗装時のクレータリングを防止するためには、
Ｆｅ−Ｐめっき量は３ｇ／ｍ”未満では、合金化溶融亜
鉛めっき鋼板表面の凹凸が大きいために、表面を完全に
被覆することができない。クレータリングは鋼板表面の
電位むらにより発生するとされており、合金化溶融亜鉛
めっき鋼板はこの電位むらを起こしやすい。したがって
表面を完全にＦｅ−Ｐめっき層で被覆することが必要と
なるのであり、その限りにおいて厚くすることに支障は
ないが実用上、１０ｇ７ｍ”以上は得策でない。Next, to prevent cratering during electrodeposition coating,
If the amount of Fe-P plating is less than 3 g/m'', the surface of the alloyed hot-dip galvanized steel sheet has large irregularities, making it impossible to completely cover the surface. Cratering is said to occur due to potential unevenness on the surface of the steel sheet. However, alloyed hot-dip galvanized steel sheets are prone to this potential unevenness. Therefore, it is necessary to completely cover the surface with a Fe-P plating layer, and as long as it is thick, there is no problem in making it thicker, but it is not practical. , 10g7m" or more is not a good idea.
（実施例）
例Ｉ、Ａｌキルド冷延鋼板（０，８ｍｍ厚み）をめっき
素材とし、脱脂後下記条件で片面にＮｉめっきを行った
。(Example) Example I: An Al-killed cold-rolled steel sheet (0.8 mm thick) was used as a plating material, and after degreasing, Ni plating was performed on one side under the following conditions.
Ｎｉめっき条件
めっき液組成 硫酸ニッケル １．１Ｍ塩化ニッケル
０．２Ｍ
ホウ酸 ０．釘
ｐ Ｈ３，５
液温 ５０°Ｃ
陰極電流密度 ２０Ａ／ｄｍ”
次に還元焼鈍を施した後、０．１５％のＡ１を含有する
溶融亜鉛浴に浸漬してめっきを行い、ワイピング装置で
所定の付着量（差厚めつき）に調整した。Ni plating conditions Plating solution composition Nickel sulfate 1.1M nickel chloride
0.2M boric acid 0. Nail pH: 3.5 Liquid temperature: 50°C Cathode current density: 20A/dm Next, after reduction annealing, plating is performed by immersion in a molten zinc bath containing 0.15% A1, and a wiping device is used to perform plating. The adhesion amount (differential thickness) was adjusted to .
続いて合金化加熱処理を行い差厚合金化溶融亜鉛めっき
鋼板を作成した。Subsequently, alloying heat treatment was performed to create differential thickness alloyed hot-dip galvanized steel sheets.
得られためっき鋼板について、付着量、めっき層中Ｆｅ
濃度、耐パウダリング性を調べた。結果を表１に示す。Regarding the obtained plated steel sheet, coating amount, Fe in the plating layer
The concentration and powdering resistance were examined. The results are shown in Table 1.
表からあきらかなように、Ｎｉを０．１ｇ／ｍ２以上析
出させることにより、厚目付側および薄日付側ともに優
れた耐パウダリング性を示し、ヤケムラのない差）￥合
金化溶融亜鉛めっき鋼板が製造できることがわかる。As is clear from the table, by precipitating Ni of 0.1 g/m2 or more, both the thick side and thin side have excellent powdering resistance, and there is no uneven discoloration. It turns out that it can be manufactured.
例■１表１に示した実施例２のめっき鋼板に以下の条件
でＰｅ−Ｐめっきを施した。Example ■1 The plated steel sheet of Example 2 shown in Table 1 was subjected to Pe-P plating under the following conditions.
めっき液組成 ＦｅＣＩｚ １５０ ｇ ／ １−Ｍ
Ｃｌ ２００ ｇ ／ １
クエン酸１０ｇ／ｆｆ１
ＮａＨｚＰＯｚ ０．００１〜Ｌｏｇ ／ｌ！。Plating solution composition FeCIz 150 g/1-M
Cl 200 g/1 Citric acid 10 g/ff1 NaHzPOz 0.001~Log/l! .
ｐ Ｈ３，０
液温 ５０°Ｃ
陰極電流密度 １０〜１５０ Ａ ／ ｄ ｍ
２得られたＦｅ−Ｐめっきを施した差厚合金化溶融亜鉛
めっき鋼板に、デイツプタイプのリン酸塩処理を施し、
次いでカチオン電着塗装を行い、耐クレータリング性を
評価した。pH 3.0 Liquid temperature 50°C Cathode current density 10-150 A/dm
2 The obtained Fe-P plated differential thickness alloyed hot-dip galvanized steel sheet was subjected to dip-type phosphate treatment,
Next, cationic electrodeposition coating was performed and cratering resistance was evaluated.
結果を表２に示す
表 ２
注二評価基準
Ｆｅ−Ｐめっき量を３ｇ／ＩＩＩｚ以上とした場合にク
レータリング防止効果が著しいことがわかる。The results are shown in Table 2. Note 2 Evaluation Criteria It can be seen that the effect of preventing cratering is remarkable when the amount of Fe-P plating is 3 g/IIIz or more.
（発明の効果）
本発明により、還元焼鈍に先立って厚目付となる鋼板の
片面にＮｔを析出させることにより、厚目付側および薄
目付側とも合金化処理においてめっき層内のＦｅ濃度を
適正にすることができ、優れた耐パウダリング性を有す
る差厚合金化溶融亜鉛めっき鋼板が得られる。さらにま
た、この鋼板の表面にＦｅ−Ｐめっきを施すことにより
カチオン電着塗装時のクレータリングを防止することが
でき、自動車外板用鋼板として極めて優れた特性を有す
る鋼板が製造可能となる。(Effects of the Invention) According to the present invention, by precipitating Nt on one side of the steel plate to be thickened prior to reduction annealing, the Fe concentration in the plating layer can be adjusted appropriately in the alloying treatment on both the thicker and thinner sides. A differential thickness alloyed hot-dip galvanized steel sheet having excellent powdering resistance can be obtained. Furthermore, by applying Fe--P plating to the surface of this steel sheet, cratering during cationic electrodeposition coating can be prevented, making it possible to manufacture a steel sheet with extremely excellent properties as a steel sheet for automobile exterior panels.
Claims (1)
溶融亜鉛めっき浴に浸漬してめっきを行い、表裏のめっ
き付着量が異なるように付着量を調整し、続いて合金化
加熱処理を施す差厚合金化溶融亜鉛めっき鋼板の製造方
法において、 還元焼鈍に先立って、亜鉛付着量が厚目付 となる片面にのみ予め０．１ｇ／ｍ＾２以上のＮｉを析
出させること を特徴とする差厚合金化溶融亜鉛めっき鋼板の製造方法
。 ２、鋼板を還元焼鈍して表面の酸化皮膜を除去した後、
溶融亜鉛めっき浴に浸漬してめっきを行い、表裏のめっ
き付着量が異なるように付着量を調整し、続いて合金化
加熱処理を施す差厚合金化溶融亜鉛めっき鋼板の製造方
法において、 還元焼鈍に先立って、亜鉛付着量が厚目付 となる片面にのみ予め０．１ｇ／ｍ＾２以上のＮｉを析
出させること、 上記還元焼鈍に引続く、亜鉛めっきのあと の合金化処理にて得られる合金化溶融亜鉛めっき鋼板表
面の少なくとも一方の面に、Ｆｅ−Ｐ合金めっき層を３
ｇ／ｍ＾２以上施すこと、を特徴とする差厚合金化溶融
亜鉛めっき鋼板の製造方法。[Claims] 1. After reducing the steel plate and removing the oxide film on the surface,
In the manufacturing method of differential thickness alloyed hot-dip galvanized steel sheets, which involves plating by immersing in a hot-dip galvanizing bath, adjusting the amount of coating so that the amount of coating on the front and back sides is different, and then performing alloying heat treatment, reduction annealing is used. 1. A method for producing a differential thickness alloyed hot-dip galvanized steel sheet, which comprises precipitating Ni in an amount of 0.1 g/m^2 or more only on one side where the zinc coating becomes thick. 2. After reducing the steel plate and removing the oxide film on the surface,
In the manufacturing method of differential thickness alloyed hot-dip galvanized steel sheets, which involves plating by immersing in a hot-dip galvanizing bath, adjusting the amount of coating so that the amount of coating on the front and back sides is different, and then performing alloying heat treatment, reduction annealing is used. Prior to this, 0.1 g/m^2 or more of Ni is precipitated only on one side where the zinc coating becomes thick, and Ni is obtained by alloying treatment after zinc plating following the reduction annealing described above. Three Fe-P alloy plating layers are applied to at least one surface of the alloyed hot-dip galvanized steel sheet surface.
A method for producing a differentially-thickness alloyed hot-dip galvanized steel sheet, the method comprising: g/m^2 or more.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10088A JP2616945B2 (en) | 1988-01-05 | 1988-01-05 | Manufacturing method of hot-dip galvanized steel sheet with differential thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10088A JP2616945B2 (en) | 1988-01-05 | 1988-01-05 | Manufacturing method of hot-dip galvanized steel sheet with differential thickness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01177348A true JPH01177348A (en) | 1989-07-13 |
| JP2616945B2 JP2616945B2 (en) | 1997-06-04 |
Family
ID=11464680
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10088A Expired - Fee Related JP2616945B2 (en) | 1988-01-05 | 1988-01-05 | Manufacturing method of hot-dip galvanized steel sheet with differential thickness |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2616945B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04276055A (en) * | 1991-02-28 | 1992-10-01 | Nisshin Steel Co Ltd | Manufacture of differential galvannealed steel |
| JPH04301058A (en) * | 1991-03-28 | 1992-10-23 | Nisshin Steel Co Ltd | Alloyed galvanized steel |
| WO2022091480A1 (en) * | 2020-10-28 | 2022-05-05 | Ｊｆｅスチール株式会社 | Hot-pressed member and steel sheet for hot-pressing, and manufacturing method for hot-pressed member |
-
1988
- 1988-01-05 JP JP10088A patent/JP2616945B2/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04276055A (en) * | 1991-02-28 | 1992-10-01 | Nisshin Steel Co Ltd | Manufacture of differential galvannealed steel |
| JPH04301058A (en) * | 1991-03-28 | 1992-10-23 | Nisshin Steel Co Ltd | Alloyed galvanized steel |
| WO2022091480A1 (en) * | 2020-10-28 | 2022-05-05 | Ｊｆｅスチール株式会社 | Hot-pressed member and steel sheet for hot-pressing, and manufacturing method for hot-pressed member |
| JPWO2022091480A1 (en) * | 2020-10-28 | 2022-05-05 | ||
| KR20230069170A (en) * | 2020-10-28 | 2023-05-18 | 제이에프이 스틸 가부시키가이샤 | Hot-pressed member, steel sheet for hot pressing, and manufacturing method of hot-pressed member |
| CN116507760A (en) * | 2020-10-28 | 2023-07-28 | 杰富意钢铁株式会社 | Hot-pressed member, steel plate for hot-pressing, and manufacturing method of hot-pressed member |
| EP4206363A4 (en) * | 2020-10-28 | 2024-03-06 | JFE Steel Corporation | HOT-PRESSED ELEMENT AND STEEL SHEET FOR HOT-PRESSING AND PRODUCTION METHOD FOR A HOT-PRESSED ELEMENT |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2616945B2 (en) | 1997-06-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP2783452B2 (en) | Manufacturing method of galvannealed steel sheet | |
| JPS61223197A (en) | Surface-treated steel plate | |
| JPH01177348A (en) | Manufacture of thickness differential alloying hot dip galvanized steel sheet | |
| JPH0645853B2 (en) | Method for producing galvannealed steel sheet | |
| JPS58189363A (en) | Manufacture of steel plate coated with alloyed zinc by galvanization | |
| JPS63312960A (en) | Manufacture of zinc alloy hot dip galvanized steel sheet having superior workability | |
| JPH07331403A (en) | Method for producing high strength alloyed hot dip galvanized steel sheet | |
| JPH02258962A (en) | Equipment for producing galvanizing steel sheet having excellent weldability | |
| JP2800285B2 (en) | Manufacturing method of galvannealed steel sheet | |
| JP2013136825A (en) | Method for producing chemical conversion-treated electrolytic galvanized steel sheet with excellent appearance | |
| JPS6167793A (en) | Manufacturing method of lead-tin plated steel sheet | |
| JP4166412B2 (en) | Method for producing hot-dip galvanized steel sheet | |
| JPH0730433B2 (en) | Aluminum plated steel sheet manufacturing method | |
| JPH07243012A (en) | Method for producing alloyed hot-dip galvanized steel sheet with excellent surface appearance | |
| JPH04268078A (en) | Treatment before coating of al series sheet for automobile body | |
| JPS6056790B2 (en) | Method for producing hot-dip galvanized steel sheet alloyed on only one side | |
| JP2792809B2 (en) | Hot-dip galvanized steel sheet | |
| JP2000248347A (en) | Method for producing hot-dip galvanized steel sheet and alloyed hot-dip galvanized steel sheet | |
| JP2940288B2 (en) | Zinc electroplated steel sheet excellent in blackening resistance and method for producing the same | |
| JPH0726360A (en) | Method for producing low surface roughness alloyed hot dip galvanized steel sheet | |
| JPS6366399B2 (en) | ||
| JP2933815B2 (en) | Manufacturing method of steel plate for welding can with excellent paint appearance | |
| JPH05140793A (en) | Production of tin-electroplated steel sheet excellent in surface luster | |
| JPH042758A (en) | Production of hot-dip zinc alloy coated steel sheet excellent in press formability and corrosion resistance after coating | |
| JP2754590B2 (en) | Alloyed hot-dip galvanized steel sheet excellent in workability and paintability and method for producing the same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |