JP2642283B2 - High strength and high ductility hot-dip galvanized steel sheet - Google Patents
High strength and high ductility hot-dip galvanized steel sheetInfo
- Publication number
- JP2642283B2 JP2642283B2 JP21902192A JP21902192A JP2642283B2 JP 2642283 B2 JP2642283 B2 JP 2642283B2 JP 21902192 A JP21902192 A JP 21902192A JP 21902192 A JP21902192 A JP 21902192A JP 2642283 B2 JP2642283 B2 JP 2642283B2
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- layer
- plating
- steel sheet
- hot
- corrosion resistance
- Prior art date
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- Coating With Molten Metal (AREA)
- Other Surface Treatments For Metallic Materials (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、高強度高延性溶融Ｚｎ
めっき鋼板に関するものである。The present invention relates to a high-strength, high-ductility molten Zn.
It relates to a plated steel sheet.
【０００２】[0002]
【従来の技術】最近、自動車の軽量化対策の一環とし
て、ボディーあるいは、下回り部品、足回り部品等への
４０〜８０キロクラスの高張力鋼板適用への期待が高ま
りつつある。これらの鋼板には、耐食性の観点から溶融
Ｚｎめっきを施すかあるいは溶融Ｚｎめっき後合金化処
理した合金化溶融Ｚｎめっきを施して使用することが有
効であるが、これらの高張力鋼板のうち高延性にするた
めにＳｉ含有量が高い鋼板の場合には鋼板表面が酸化膜
を有しやすいため、通常の無酸化炉方式の溶融Ｚｎめっ
き法においては、溶融Ｚｎめっきの際に微小不めっき部
が生じたり、めっき密着性が劣るなどの問題がある。こ
れらを解決すべく例えば特開昭５５−１３１１６５のプ
レＮｉめっき後にフラックス処理を行って、溶融Ｚｎめ
っきする方法は、めっき剥離はないが、界面にクラック
を生じる程度までめっき密着性が改善されることが開示
されているが、地鉄界面にＦｅ−Ｚｎ合金層が成長しや
すく、車体部品等の厳しい加工を受ける場合にはめっき
密着性がなお不十分であり、耐食性についてもなお不十
分であり、さらに改良が望まれていた。2. Description of the Related Art In recent years, as a part of measures to reduce the weight of automobiles, expectations for the application of high-strength steel sheets of 40 to 80 kg class to bodies, lower parts, underbody parts and the like are increasing. From the viewpoint of corrosion resistance, it is effective to apply hot-dip Zn plating or to apply alloyed hot-dip Zn plating after alloying after hot-dip Zn plating. In the case of a steel sheet having a high Si content in order to make it ductile, the steel sheet surface tends to have an oxide film. And the adhesion of the plating is poor. In order to solve these problems, for example, a method of performing a flux treatment after pre-Ni plating in JP-A-55-131165 and performing hot-dip Zn plating does not cause plating peeling, but improves plating adhesion to the extent that cracks occur at the interface. However, it is disclosed that the Fe-Zn alloy layer easily grows at the ground iron interface, and when subjected to severe processing such as body parts, the plating adhesion is still insufficient, and the corrosion resistance is still insufficient. Yes, and further improvements were desired.
【０００３】[0003]
【発明が解決しようとする課題】これに対して、本発明
者らは特願平０３−１４６５４１において高Ｓｉ系高強
度鋼板のめっき密着性を大幅に改善する溶融めっき方法
としてプレＮｉめっき後急速低温加熱する方法を提案中
である。本方法は優れた方法であり、高Ｓｉを含有する
高張力高延性鋼板に適用した場合に溶融Ｚｎめっき性が
大幅に改善される。その後、本方法により得られた溶融
Ｚｎめっき層の構造を詳細に解析し、プレＮｉめっき後
にフラックス処理を行う方法で得られた溶融Ｚｎめっき
層との構造の相違などを検討し、種々の実験を重ね、上
記課題である、めっき密着性および耐食性に優れた高強
度高延性溶融Ｚｎめっき鋼板を開発すべく検討した。On the other hand, the inventors of the present invention disclosed in Japanese Patent Application No. 03-146541 as a hot-dip plating method for greatly improving the plating adhesion of a high-Si based high-strength steel sheet after pre-Ni plating. A low-temperature heating method is being proposed. This method is an excellent method, and when applied to a high-tensile and high-ductility steel sheet containing high Si, hot-dip Zn plating is greatly improved. After that, the structure of the hot-dip Zn plating layer obtained by this method was analyzed in detail, and the difference in the structure with the hot-dip Zn plating layer obtained by the method of performing flux treatment after pre-Ni plating was examined. We studied to develop a high-strength, high-ductility hot-dip galvanized steel sheet with excellent plating adhesion and corrosion resistance.
【０００４】[0004]
【課題を解決するための手段】本発明者らはまず、特願
平０３−１４６５４１で提案中の方法で得られた溶融Ｚ
ｎめっき層の構造を詳細に検討したところ、プレＮｉめ
っき後にフラックス処理を行う方法で得られた溶融Ｚｎ
めっき層とは地鉄界面の構造が明確に異なっていること
を確認した。さらに、各種の鋼板組成、めっき層組成、
構造よりなるめっき層を作成して検討をつづけたとこ
ろ、高Ｓｉ鋼に対して最もめっき密着性が優れ、耐食性
も良好となるめっき層組成、構造が明らかになり、本発
明の下地鋼板組成、めっき層構造、組成を有する溶融Ｚ
ｎめっき層よりなるめっき密着性の優れた高延性高張力
溶融Ｚｎめっき鋼板を見いだすに至り、下記の本発明を
完成したものである。Means for Solving the Problems The present inventors have firstly obtained a molten Z obtained by the method proposed in Japanese Patent Application No. 03-146541.
When the structure of the n-plated layer was examined in detail, the molten Zn obtained by a method of performing flux treatment after pre-Ni plating was used.
It was confirmed that the structure of the ground iron interface was clearly different from that of the plating layer. Furthermore, various steel sheet compositions, plating layer compositions,
When the plating layer having the structure was prepared and the examination was continued, the plating layer composition and the structure having the best plating adhesion to the high Si steel and the good corrosion resistance were clarified, and the composition of the base steel sheet of the present invention, Molten Z having plating layer structure and composition
The present inventors have found a high ductility, high tensile strength hot-dip galvanized steel sheet having excellent plating adhesion consisting of an n-plated layer, and have completed the present invention described below.
【０００５】即ち、Ｃ ０．０２〜０．２％、Ｓｉ
０．２〜２．０％、Ｍｎ ０．１５〜２．５％、Ｓｏ
ｌ．Ａｌ ０．０８％以下を含有し、残りは不可避成分
よりなる鋼板上に、第１層としてＮｉ−Ａｌ−Ｓｉ−Ｆ
ｅ−Ｚｎ系化合物層を有し、第２層としてＮｉ−Ａｌ−
Ｚｎ系化合物層、第３層としてＮｉ ０．０１〜２％、
Ａｌ １％以下と不可避成分よりなるＺｎ合金層を有し
てなることを特徴とするめっき密着性及び耐赤錆性に優
れた高強度高延性溶融Ｚｎめっき鋼板、および第３層に
さらに合金成分としてＦｅ，Ｓｂ，Ｐｂ，Ｍｇを単独あ
るいは複合で１％以内含有することを特徴とする耐食性
およびめっき密着性の優れた高強度高延性溶融Ｚｎめっ
き鋼板。[0005] That is, C 0.02-0.2%, Si
0.2-2.0%, Mn 0.15-2.5%, So
l. A containing an Al 0.08% or less, on the steel sheet remainder consisting unavoidable component, Ni-Al-Si-F as the first layer
an e-Zn-based compound layer, and Ni-Al-
Zn-based compound layer, Ni 0.01 to 2% as a third layer,
A high-strength, high-ductility hot-dip galvanized steel sheet having excellent plating adhesion and red rust resistance, characterized by having a Zn alloy layer composed of Al 1% or less and an unavoidable component, and further as an alloy component in the third layer A high-strength, high-ductility hot-dip galvanized steel sheet having excellent corrosion resistance and plating adhesion, characterized by containing Fe, Sb, Pb, and Mg alone or in a combination of 1% or less.
【０００６】以下、図面を用いて本発明について詳細に
説明する。Hereinafter, the present invention will be described in detail with reference to the drawings.
【０００７】図１、図２は、それぞれ本発明の溶融Ｚｎ
めっき鋼板のめっき層構造および従来のプレＮｉめっき
後にフラックス処理を行う方法で得られためっき層を模
式的に示した図である。FIGS. 1 and 2 show the molten Zn of the present invention, respectively.
It is the figure which showed typically the plating layer structure of the plating steel plate, and the plating layer obtained by the method of performing a flux process after the conventional pre-Ni plating.
【０００８】下地鋼板には共にＳｉ １．２％含有鋼板
を用いた。本発明は地鉄の界面側から、第１層がＮｉ−
Ａｌ−Ｓｉ−Ｆｅ−Ｚｎ系化合物層、第２層がＮｉ−Ａ
ｌ−Ｚｎ系化合物層、第３層がＮｉ ０．０１〜２％、
Ａｌ １％以下と不可避成分よりなるＺｎ合金層であ
る。これに対して、Ｎｉめっき後にフラックス処理を行
う方法で得られためっき層は本発明の第１層および第２
層に相当する層は存在せず、地鉄界面にはＦｅ−Ｚｎ−
Ｎｉ合金層が存在するのみである。また、表１に両者の
めっき密着性の結果を示す。As the base steel sheet, a steel sheet containing 1.2% of Si was used. In the present invention, the first layer is Ni-
Al-Si-Fe-Zn based compound layer, the second layer is Ni-A
the l-Zn-based compound layer, the third layer is Ni 0.01 to 2%,
This is a Zn alloy layer composed of Al at 1% or less and an unavoidable component. On the other hand, the plating layer obtained by performing the flux treatment after the Ni plating is the first layer and the second layer of the present invention.
No layer corresponding to the layer exists, and Fe-Zn-
Only the Ni alloy layer is present. Table 1 shows the results of the plating adhesion between the two.
【０００９】めっき密着性は、ボールインパクト試験を
実施し、次の評価基準により評価した。The plating adhesion was evaluated by performing a ball impact test according to the following evaluation criteria.
【００１０】評価 ５…剥離皆無 ４…剥離なし、微小薄めっき程度 ３…剥離殆どなし ２…微小剥離 １…剥離大Evaluation 5: No peeling 4: No peeling, fine thin plating 3: Little peeling 2: Fine peeling 1: Large peeling
【００１１】[0011]
【表１】 [Table 1]
【００１２】本発明においては、めっき密着性が非常に
良好である。地鉄界面近傍に第１層および第２層が存在
することが本発明の重要なポイントであり、そのために
めっき密着性が大幅に改善される。In the present invention, plating adhesion is very good. It is an important point of the present invention that the first layer and the second layer are present in the vicinity of the base iron interface, and therefore, the plating adhesion is greatly improved.
【００１３】また、図３は第３層中のＮｉ％（重量％）
と裸耐食性の関係を示した図である。併せてプレＮｉめ
っき後にフラックス処理を行う方法の場合もプロットし
た。表面層の厚みは本発明と同様である。３層合計のめ
っき層厚は１３５ｇ／ｍ2 とした。耐食性は平板および
端面打ち抜き材を未塗装状態で塩水噴霧試験（ＳＳＴ２
５０ｈｒ）における赤錆の発生状況により５段階評価し
た。FIG. 3 shows Ni% (% by weight) in the third layer.
It is a figure which showed the relationship between and bare corrosion resistance. In addition, a plot is also plotted for the method of performing flux treatment after pre-Ni plating. The thickness of the surface layer is the same as in the present invention. The total plating layer thickness of the three layers was 135 g / m 2 . Corrosion resistance was measured with salt spray test (SST2)
The evaluation was made on a five-point scale according to the occurrence of red rust at 50 hr).
【００１４】 平板耐食性（ＳＳＴ２５０ｈｒ） 打ち抜き端面耐食性（ＳＳＴ２５０ｈｒ） 評点 評点 ５ 赤錆なし ５ 赤錆なし ４ 微量 点錆 ４ 微量 点錆 ３ 点錆少し ３ 点錆少し ２ 赤錆多い ２ 赤錆多い １ 全面赤錆 １ 全面赤錆 （３以上が合格） （３以上が合格） 本発明はＮｉめっき後フラックス処理する方法よりも耐
食性が良好である。また、めっき層中Ｎｉが０．０１％
以上で裸耐食性が向上する。Flat plate corrosion resistance (SST250hr) Punched end face corrosion resistance (SST250hr) (3 or more passed) (3 or more passed) The present invention has better corrosion resistance than the method of flux treatment after Ni plating. The Ni content in the plating layer is 0.01%.
As described above, bare corrosion resistance is improved.
【００１５】また、めっき層中Ｎｉ含有率が２％を越え
ると端面の耐食性が劣化する。Ｚｎの腐食が進んだ時に
電位が貴になりすぎ端面、傷部等の局部腐食が生じやす
くなるためと思われる。Further, when the Ni content in the plating layer exceeds 2%, the corrosion resistance of the end face deteriorates. This is presumably because when the corrosion of Zn progresses, the potential becomes too noble and local corrosion such as end faces and scratches is likely to occur.
【００１６】これらの結果は、めっき層中にＦｅ，Ｓ
ｂ，Ｐｂ，Ｍｇを単独あるいは複合で３％以内含有する
場合にも同様であった。These results indicate that Fe, S
The same applies to cases where b, Pb, and Mg are contained alone or in a composite within 3%.
【００１７】また、めっき層中Ａｌを１％以下としたの
は、浴中Ａｌが１％を超えるとめっき層中に偏析したＡ
ｌが局部電池を構成し、耐食性が劣化するためである。The reason why the content of Al in the plating layer is set to 1% or less is that when the content of Al in the bath exceeds 1%, A segregated in the plating layer.
This is because 1 constitutes a local battery and the corrosion resistance is deteriorated.
【００１８】下層にＮｉめっき層を設ける場合における
プレＮｉめっき量については２ｇ／ｍ2 以下が好まし
い。２ｇ／ｍ2 を越えるとめっき密着性が劣化するため
である。When a Ni plating layer is provided as a lower layer, the amount of pre-Ni plating is preferably 2 g / m 2 or less. If it exceeds 2 g / m 2 , the adhesion of the plating deteriorates.
【００１９】第１層から第３層までの厚みについては特
に制約は設けないが、耐食性の観点から１μｍ以上、加
工性の観点からすると５０μｍ以下であることが望まし
い。図１、図３及び表１の結果は、下地の高張力鋼板成
分として、鋼中のＣ ０．０２〜０．２％、Ｓｉ ０．
２〜２．０％、Ｍｎ ０．１５〜２．５％、Ｓｏｌ．Ａ
ｌ ０．０８％以下を含有し、残りは不可避成分よりな
る鋼板において同様の結果であった。鋼中Ｃ、Ｓｉ、Ｍ
ｎ量の下限は、強度を確保するため、上限はそれ以上含
有すると加工性が悪くなることを考慮した。また、鋼中
Ｓｏｌ．Ａｌの添加目的は脱酸元素としての役割であ
る。また、上限を０．０８％としたのは、過剰に添加し
すぎると鋼板を製造する際にわれを生じやすいためであ
る。高張力鋼板としては、熱延鋼板、冷延鋼板共に使用
できる。材質としても引張強度４０〜８０ｋｇ／ｍ2 、
伸び２０〜３５％程度の高強度高延性の溶融Ｚｎめっき
鋼板が可能である。The thickness of the first to third layers is not particularly limited, but is preferably 1 μm or more from the viewpoint of corrosion resistance and 50 μm or less from the viewpoint of workability. The results in FIGS. 1 and 3 and Table 1 show that, as components of the high-strength steel plate of the base, C 0.02 to 0.2% in steel, Si 0.
2 to 2.0%, Mn 0.15 to 2.5%, Sol. A
a containing a l 0.08% or less, the balance being similar results in a steel sheet consisting of an unavoidable component. C, Si, M in steel
The lower limit of the amount of n was taken into consideration that if the upper limit is more than that, the workability deteriorates in order to secure the strength. In addition, Sol. The purpose of adding Al is to serve as a deoxidizing element. The reason why the upper limit is set to 0.08% is that if the excessive addition is made, cracks are likely to occur when manufacturing a steel sheet. As a high-tensile steel sheet, both a hot-rolled steel sheet and a cold-rolled steel sheet can be used. The material has a tensile strength of 40 to 80 kg / m 2 ,
A high-strength, high-ductility hot-dip Zn-coated steel sheet having an elongation of about 20 to 35% is possible.
【００２０】本発明のめっき鋼板の製造方法については
特に限定されない。望ましくは本発明者らが提案した鋼
板にプレＮｉめっきを０．２〜２ｇ／ｍ2 施したのち無
酸化あるいは還元雰囲気中で急速低温加熱を行ったの
ち、Ｎｉ ０．０１〜２％、Ａｌ １％以下含有し、残
部Ｚｎおよび不可避的不純物よりなる溶融Ｚｎ浴、ある
いはＮｉ ０．０１〜２％、Ａｌ １％以下、Ｆｅ、Ｓ
ｂ、Ｐｂ、Ｍｇを単独あるいは複合で３％以下含有し、
残部Ｚｎおよび不可避的不純物よりなる溶融Ｚｎ浴中に
浸漬し溶融めっきを行う方法が最適である。The method for producing the plated steel sheet of the present invention is not particularly limited. After desirably subjected to rapid low temperature heating in a non-oxidizing or reducing atmosphere after the present inventors pre-Ni plating was applied 0.2 to 2 g / m 2 with the proposed steel, Ni 0.01 to 2%, Al Contains less than 1%, remaining
There is a molten Zn bath consisting of part Zn and unavoidable impurities
Or Ni 0.01-2%, Al 1% or less, Fe, S
b, Pb, Mg alone or in a compound containing 3% or less,
In a molten Zn bath consisting of the balance of Zn and unavoidable impurities
The method of immersion and hot- dip plating is optimal.
【００２１】[0021]
【作用】めっき層の地鉄界面に、第１層のＮｉ−Ａｌ−
Ｓｉ−Ｆｅ−Ｚｎ系化合物層、第２層のＮｉ−Ａｌ−Ｚ
ｎ系化合物層が存在することによりめっき密着性が良好
となる理由は未だ明確ではないが、これらの層がＺｎめ
っき層と地鉄との界面で一種のバインダーの役割を果し
ているものと考えられる。また、めっき層中にＮｉが微
量含有することにより、裸耐食性が向上するのは、よく
知られている通り、Ｚｎの耐食生成物のうち塩基性水酸
化亜鉛が安定化するためと考えられる。The first layer of Ni-Al-
Si—Fe—Zn based compound layer, Ni—Al—Z of second layer
Although the reason why the plating adhesion is improved by the presence of the n-type compound layer is not yet clear, it is considered that these layers play a role of a kind of binder at the interface between the Zn plating layer and the base iron. . It is considered that the reason why the bare corrosion resistance is improved by containing a trace amount of Ni in the plating layer is that, as is well known, basic zinc hydroxide among the corrosion-resistant products of Zn is stabilized.
【００２２】[0022]
【実施例】表２に本発明めっき鋼板の実施例を示す。＊
印は本発明以外の比較材である。下地としては表３に示
す熱延高張力鋼板を用いた。地鉄界面の第１層および第
２層の構造、第３層のＺｎめっき層中の成分の種々変化
した場合である。めっきの製造法としては、プレＮｉめ
っきの付着量を変化させたプレＮｉめっき法において浴
中にＮｉも含有率を変化させて溶解させる方法を用い
た。Ａｌ量の変化した４５０℃のＺｎめっき浴で３ｓ溶
融めっきを行い、Ｎ2 ワイピングで付着量を１３５ｇ／
ｍ2 に調整した。得られためっき鋼板の耐食性は、前述
の裸耐食性の評価に端面の局部腐食性を加味して評価し
た。また、めっき密着性は前述したボールインパクト試
験を実施した。EXAMPLES Table 2 shows examples of the plated steel sheet of the present invention. *
The marks are comparative materials other than the present invention. As a base, a hot-rolled high-tensile steel sheet shown in Table 3 was used. This is a case where the structures of the first layer and the second layer at the ground iron interface and the components in the third Zn plating layer are variously changed. As a method for producing the plating, a method was used in which the content of Ni was changed in the bath and the content was changed in the pre-Ni plating method in which the amount of the pre-Ni plating applied was changed. Performed 3s hot dipping of Al amount changed 450 ° C. of Zn plating bath, 135 g of coating weight in N 2 wiping /
It was adjusted to m 2. The corrosion resistance of the obtained plated steel sheet was evaluated in consideration of the above-mentioned bare corrosion resistance and the local corrosion of the end face. Further, the plating impact was measured by the ball impact test described above.
【００２３】Ｎｏ．２〜６、８〜２１に示す通り、本発
明のめっき層構造および組成よりなるめっき鋼板は、め
っき密着性および耐食性が優れ、高強度高延性を示す。
これに比較してめっき層構造および組成が本発明範囲を
逸脱する場合（Ｎｏ．１、７、２２）は、本発明鋼板に
比較して裸耐食性およびめっき密着性が劣る。No. As shown in 2 to 6 and 8 to 21, the plated steel sheet having the plated layer structure and composition of the present invention has excellent plating adhesion and corrosion resistance, and exhibits high strength and high ductility.
In contrast, when the plating layer structure and composition deviate from the range of the present invention (Nos. 1, 7, and 22), bare corrosion resistance and plating adhesion are inferior to the steel sheet of the present invention.
【００２４】[0024]
【表２】 [Table 2]
【００２５】[0025]
【表３】 [Table 3]
【００２６】[0026]
【発明の効果】以上のように、本発明は、従来にない耐
食性およびめっき密着性に優れた高強度高延性溶融Ｚｎ
めっき鋼板であり、車体、建材用途などに有用であるこ
とからその工業的意義は極めて大きい。As described above, the present invention provides a high-strength, high-ductility molten Zn having excellent corrosion resistance and excellent plating adhesion.
It is a plated steel sheet, and its industrial significance is extremely large because it is useful for vehicle bodies and building materials.
【図面の簡単な説明】[Brief description of the drawings]
【図１】本発明の溶融Ｚｎめっき鋼板のめっき層構造を
模式的に示した図。FIG. 1 is a diagram schematically showing a plating layer structure of a hot-dip galvanized steel sheet of the present invention.
【図２】従来のプレＮｉめっき後にフラックス処理を行
う方法で得られためっき層を模式的に示した図。FIG. 2 is a diagram schematically showing a plating layer obtained by a conventional method of performing a flux treatment after pre-Ni plating.
【図３】めっき層中のＮｉ％（重量％）と耐食性の関係
を示した図。FIG. 3 is a diagram showing a relationship between Ni% (% by weight) in a plating layer and corrosion resistance.
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 // Ｃ２２Ｃ 38/00 ３０１ Ｃ２２Ｃ 38/00 ３０１Ｔ 38/06 38/06 (72)発明者 織田昌彦 姫路市広畑区富士町１番地 新日本製鐵 株式会社広畑製鐵所内 (72)発明者 村本藤和 姫路市広畑区富士町１番地 新日本製鐵 株式会社広畑製鐵所内 (56)参考文献 特開 平４−333552（ＪＰ，Ａ) 特開 平４−346644（ＪＰ，Ａ) 特開 平５−140711（ＪＰ，Ａ) 特開 平５−331537（ＪＰ，Ａ) 特開 昭55−131165（ＪＰ，Ａ)Continuation of the front page (51) Int.Cl. 6 Identification number Office reference number FI Technical display location // C22C 38/00 301 C22C 38/00 301T 38/06 38/06 (72) Inventor Masahiko Oda Hirohata, Himeji-shi 1 Fujimachi-ku, Nippon Steel Corporation Hirohata Works, Ltd. (72) Inventor Fujiwa Muramoto 1 Fujimachi, Hirohata-ku, Himeji-shi Nippon Steel Corporation Hirohata Works, Ltd. (56) References JP4 JP-A-333552 (JP, A) JP-A-4-346644 (JP, A) JP-A-5-140711 (JP, A) JP-A-5-331537 (JP, A) JP-A-55-131165 (JP, A) )
Claims (2)
−Ａｌ−Ｓｉ−Ｆｅ−Ｚｎ系化合物層を有し、第２層と
してＮｉ−Ａｌ−Ｚｎ系化合物層、第３層としてＮｉ
０．０１〜２％、Ａｌ １％以下と不可避的成分よりな
るＺｎ合金層を有してなることを特徴とするめっき密着
性及び耐赤錆性に優れた高強度高延性溶融Ｚｎめっき鋼
板。1. C 0.02 to 0.2%, Si 0.2 to 2.0%, Mn 0.15 to 2.5%, Sol. A containing an al 0.08% or less, on the steel sheet remainder consisting unavoidable component, Ni as the first layer
-Al-Si-Fe-Zn based compound layer, Ni-Al-Zn based compound layer as the second layer, and Ni as the third layer
A high-strength, high-ductility hot-dip galvanized steel sheet having excellent plating adhesion and red rust resistance, comprising a Zn alloy layer comprising 0.01 to 2% and Al of 1% or less and an unavoidable component.
Ｆｅ，Ｓｂ，Ｐｂ，Ｍｇを単独あるいは複合で３％以内
含有することを特徴とする耐食性およびめっき密着性の
優れた高強度高延性溶融Ｚｎめっき鋼板。2. A high-strength steel with excellent corrosion resistance and plating adhesion, characterized in that the third layer further contains Fe, Sb, Pb, Mg as an alloying component, singly or in combination, within 3%. Ductile hot-dip galvanized steel sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21902192A JP2642283B2 (en) | 1992-08-18 | 1992-08-18 | High strength and high ductility hot-dip galvanized steel sheet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21902192A JP2642283B2 (en) | 1992-08-18 | 1992-08-18 | High strength and high ductility hot-dip galvanized steel sheet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0665700A JPH0665700A (en) | 1994-03-08 |
| JP2642283B2 true JP2642283B2 (en) | 1997-08-20 |
Family
ID=16729014
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21902192A Expired - Fee Related JP2642283B2 (en) | 1992-08-18 | 1992-08-18 | High strength and high ductility hot-dip galvanized steel sheet |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2642283B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100723157B1 (en) * | 2005-12-23 | 2007-05-30 | 주식회사 포스코 | Steel sheet having ultra-high strength and excellent corrosion resistance after hot press forming and the method for manufacturing thereof |
| JP2009102688A (en) * | 2007-10-22 | 2009-05-14 | Nisshin Steel Co Ltd | Chemically-converted steel sheet |
| KR101242859B1 (en) * | 2010-11-05 | 2013-03-12 | 주식회사 포스코 | Galvanized steel sheet containing high manganese with excellent galvanizing properties and coating adhesion and method for manufacturing the same |
| CN107904485B (en) * | 2017-07-24 | 2019-10-15 | 柳州钢铁股份有限公司 | 420MPa grades of cold rolling low-alloy high-strength steels of yield strength and its manufacturing method |
-
1992
- 1992-08-18 JP JP21902192A patent/JP2642283B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0665700A (en) | 1994-03-08 |
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