JPS62142755A - Alloyed hot dip galvanized steel sheet and its manufacture - Google Patents
Alloyed hot dip galvanized steel sheet and its manufactureInfo
- Publication number
- JPS62142755A JPS62142755A JP28330085A JP28330085A JPS62142755A JP S62142755 A JPS62142755 A JP S62142755A JP 28330085 A JP28330085 A JP 28330085A JP 28330085 A JP28330085 A JP 28330085A JP S62142755 A JPS62142755 A JP S62142755A
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Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、合金化溶融亜鉛めっき鋼板およびその製造方
法に関し、特に、プレス成形性、めつきｊｌ′ｉ密竹性
および表面外観の潰れためつき鋼板およびその製造方法
を提供するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial Application Field) The present invention relates to an alloyed hot-dip galvanized steel sheet and a method for manufacturing the same, particularly for improving press formability, plating quality, and crushing of surface appearance. The present invention provides a steel plate and a method for manufacturing the same.
（従来の技術）
自動車メーカー等においては耐食性鋼板として弓虫亜鉛
めつき′Ａ板が多用されており、最近では。(Prior Art) Automobile manufacturers and others have frequently used galvanized 'A' plates as corrosion-resistant steel plates, and recently.
消費者の車体ｉ！！ｊ、を久性に対する認識の高揚と共
に益益防錆鋼板の重要性が高まりつつある。また、自動
車の品質の著しい向上に伴い、製品品質に四する管理が
益々厳しさを増しており、亜鉛めっき鋼板にも冷延鋼板
と同様の厳格な材質レベル、表面品質の要求が高まりつ
つある。Consumer car body i! ! J. The importance of anti-corrosion steel sheets is increasing as awareness of durability increases. In addition, with the remarkable improvement in the quality of automobiles, product quality control is becoming increasingly strict, and the same strict material level and surface quality requirements for galvanized steel sheets as for cold-rolled steel sheets are increasing. .
これら自動車産業界の要求に応え得る高品質の溶融徨鉛
めつき鋼板を供給するには、■加工性（プレス成形性、
めっきｊＷｉｒ ｍ層性）、■衣面外蒙等の品質レイル
と従来よりも一段と良好なものにする必要がある。In order to supply high-quality hot-dip lead-plated steel sheets that can meet the demands of the automobile industry, we must: ■Workability (press formability,
It is necessary to improve the quality of the plating, such as the layer quality of the plating layer, and the outer surface of the coating.
従来の溶融亜鉛めっき鋼板およびその製造技術は、まず
プレス成形性に関しては、ＴＩやＮｂ寺を添加した極低
炭素鋼板を用いることによりほぼ満足できるものができ
つつあった。 しかしながら、最近のめっき層厚さの増
加傾向の中で顕在化してきたプレス時の連続成形性が劣
る問題は、該鋼板を使用しても解決できないものである
。Conventional hot-dip galvanized steel sheets and their manufacturing techniques have almost achieved satisfactory press formability by using ultra-low carbon steel sheets to which TI and Nb are added. However, the problem of poor continuous formability during pressing, which has become apparent due to the recent tendency to increase the thickness of the plating layer, cannot be solved even with the use of this steel sheet.
また、従来の溶融亜鉛めっき鋼板はめっき層密着性を高
める観点から、亜鉛浴中のＡ！級度ｆ：高くして製造し
ていた。かかる製造方法においては密着性は向上するも
のの、浴中のＡｔは浴Ｚｎおよび鋼板から一部浴中へ溶
は出すｐｅと７．ｎ −Ａｔ −ｐｃ 化合物、いわ
ゆるドロスを生成する乏めに、Ａｔ含有ｈ１が高いこと
によってドロスに起因する表面外観の劣化する問題を内
在してい友。In addition, conventional hot-dip galvanized steel sheets have A! It was manufactured with a high grade f: Although adhesion is improved in this manufacturing method, At in the bath is partially dissolved into the bath from the Zn and steel plates and 7. Although the n -At -pc compound produces so-called dross, it has a problem of deterioration of the surface appearance due to the dross due to the high At content h1.
以上の四朗をｌｌｆ、決するための技術として、例えば
、特開昭６０−２６６５２号公報の技術が開示されてい
る。該公報においては、めっき層の一部を合金化せしめ
ることにより、プレス時に金型へのめつき金属の付層が
減少Ｌ ｂ プレス疵の発生を抑１ム１］できることが
開示さｆＬでいる。しかしながら。As a technique for determining the above-mentioned Shirou, for example, a technique is disclosed in Japanese Patent Application Laid-Open No. 60-26652. This publication discloses that by alloying a part of the plating layer, the adhesion of the plated metal to the mold during pressing can be reduced and the occurrence of press flaws can be suppressed. . however.
かかる方法を詳細に検討してみると、必ずしも表面外（
’Ｊｔは６４足できるものではないことを知見した。If we examine such methods in detail, we will find that they are not always beyond the surface (
I found out that 64 pairs of Jt cannot be made.
これは、上記の如く、ドロスに起因する問題である。か
かる技術においても浴中のＡｔα関？低めて製造すれば
表面外貌の問題ｔよ解決されるものの。As mentioned above, this is a problem caused by dross. Even with this technique, Atα in the bath? Although the problem of surface appearance can be solved by manufacturing at a lower temperature.
この場合ＶＣは、めっき層重有性の著しい低下が起こり
、自動車寺の厳しい成形を受ける用途には適用できない
冴の欠点がある。In this case, VC has the drawback that the plating layer overlap is significantly reduced and it cannot be applied to applications that undergo severe molding such as automobile parts.
本発明は、前記の１課題を解決することを計ってなされ
たもので、合金化溶融亜鉛めっき鋼板およびその製造方
法、特に、ｆレス成形性、めっき層密着性および表面外
観の優れためつき鋼板およびその製造方法を提供する。The present invention has been made with the aim of solving the above-mentioned problem, and includes an alloyed hot-dip galvanized steel sheet and a method for producing the same, particularly a galvanized steel sheet with excellent f-less formability, coating layer adhesion, and surface appearance. and a manufacturing method thereof.
（問題点を解決するための手段）
本発明は、Ｏａ ０−００７ Ｘ以下％ ｓｉ：ｏ、ｔ
％以下ｈ Ｍ ｎ： ０．４％以下、Ｐ：Ｕ、０３％以
下、Ｓ：０−０３ Ｘ以下、Ａｔ：０．１％以下、Ｎ：
０．００７％以下、 ｒｉ ： ０．００３％以上０
゜０４％以下、Ｎｂ：０、００３％以上０．０４％以下
、残部）Ｍ ｅおよび不可避的不純物からなる一孜表面
に全めっき層厚（亜鉛層と合金層の合計Ｎ）を片面当り
４〜３０μｍする合金化浴融亜鉛めっき鋼板、および、
Ｃ：０、００７％以下、ｓｉ：ｏ、ｔ％以下、 Ｍｎ
： ０．４％以下、Ｐ：０．０３％以下、Ｓ：０．０３
％以下、Ａｔ：０．１％以下、Ｎ：０．００７％以下ｂ
’ｒ ’ ＊ ０．００３％以上０．０４％以下、Ｎ
ｂ ： ０−００３ ／ｇ以以上０註０鋼板を、ｈｔ
： ０．０２〜０．２０％、Ｐｂ：０．１％以下、残
部不純物および７．ｎからなる４３０〜５００ ℃のめ
つき俗へ導き、全めっき層厚４〜３０μｍのめつきを施
し、次いで板温４２０〜６００℃に加熱し、鋼板と亜鉛
層の間に存在する合金層厚を全めっき層厚の１／４〜３
／４生成せしめることを特徴とする合金化溶融亜鉛めっ
き鋼板の製造方法である。Ｔｉ ： ／４８／１４）（
Ｎ（至）−０，００２％〕超（４，００（％）＋３．４
３Ｎ＜％）〕未満、Ｎｂ：２．０％超０．０２５％未満
とし、更に（Ｔｉ （％） ＋Ｎｂ（％）〕≦０．０４
％とするのが好ましい。(Means for Solving the Problems) The present invention provides Oa 0-007X or less% si:o, t
% or less h M n: 0.4% or less, P: U, 03% or less, S: 0-03 X or less, At: 0.1% or less, N:
0.007% or less, ri: 0.003% or more 0
0.04% or less, Nb: 0, 0.003% or more and 0.04% or less, remainder) Me and inevitable impurities.The total plating layer thickness (total N of zinc layer and alloy layer) on the surface is 4% per side. ~30μm alloying bath dip galvanized steel sheet, and
C: 0,007% or less, si: o, t% or less, Mn
: 0.4% or less, P: 0.03% or less, S: 0.03
% or less, At: 0.1% or less, N: 0.007% or less b
'r' * 0.003% or more and 0.04% or less, N
b: 0-003/g or more 0 Note 0 steel plate, h
: 0.02 to 0.20%, Pb: 0.1% or less, remaining impurities and 7. The plate is then heated to a plate temperature of 420 to 600°C to reduce the thickness of the alloy layer existing between the steel sheet and the zinc layer. 1/4 to 3 of the total plating layer thickness
This is a method for manufacturing an alloyed hot-dip galvanized steel sheet, characterized in that it produces a galvannealed steel sheet with a galvanized steel sheet of 0.4%. Ti: /48/14)(
N(to) -0,002%]>(4,00(%)+3.4
3N<%)], Nb: more than 2.0% and less than 0.025%, and furthermore, (Ti (%) + Nb (%)) ≦0.04
% is preferable.
（作 用）
次に、本発明による合金化溶融亜鉛めっき鋼板およびそ
の製造方法の詳純を述べる。(Function) Next, the details of the alloyed hot-dip galvanized steel sheet and the manufacturing method thereof according to the present invention will be described.
第１図は本発明による合金化溶融亜鉛めっき鋼板の１ｏ
ｔ面説明図を示す。本発明の合金化溶融亜鉛めっき鋼板
り図示の如く鋼板１上に合金層２と亜鉛層３を順次形成
したもので、合金層２の厚さは全めっき層厚さく合金層
２および亜鉛層３の合訃層厚さ）の１／４〜３／４に構
成するものであり。Figure 1 shows 1o of the alloyed hot-dip galvanized steel sheet according to the present invention.
A t-plane explanatory diagram is shown. The alloyed hot-dip galvanized steel sheet of the present invention is one in which an alloy layer 2 and a zinc layer 3 are sequentially formed on a steel sheet 1 as shown in the figure, and the thickness of the alloy layer 2 is the thickness of all the plating layers. 1/4 to 3/4 of the thickness of the joint layer.
かかるめっき層を鋼板の片面または両面に形成するもの
である。併せて、鋼板１の化学成分をＣ：０、００７％
以下％Ｓ１：０．１＋Ｘμ下、 Ｍｎ ： ０．４％以
下ｍＰ：ｏ、０３％以下、Ｓ：（Ｊ、０３夕ぎ以下、Ａ
ｔ：０．１％以下、Ｎ： ０．００７Ｘ以下、 カッ’
ｆ ＋ ４！：Ｎｂを０．００３％≦Ｊｆ ｒ （％）
≦ｏ、 ０４ Ｘ 、 ０．００３％≦Ｎ ｂ （Ｘ）
≦０−０４ Ｘとし、ＩＡ部がＦｅおよび四の不可避
的不純物からなる如くした。Such a plating layer is formed on one or both sides of the steel plate. In addition, the chemical composition of steel plate 1 is C: 0.007%.
Below % S1: below 0.1+Xμ, Mn: below 0.4% mP: o, below 03%, S: (J, below 03 evening, A
T: 0.1% or less, N: 0.007X or less, Ka'
f+4! :Nb 0.003%≦Jf r (%)
≦o, 04 X, 0.003%≦N b (X)
≦0-04X, so that the IA portion consisted of Fe and four unavoidable impurities.
鋼板１の化学成分を ＩＩＩ ｉ含有量：（４８／１４
）（Ｎ（ヌの−０，００２％）＜％’ｉ（％）〈 〔４
，０，６（至）＋ ３．４３ Ｎ （Ｘ））とし、Ｎｂ
含有量をＮｂ（％））２．００（％）で、かつ０．０２
５％未満とし、さらに［％’ｉ（％）＋Ｎｂ（％）〕≦
０．０４メＣとすることはより望ましい。The chemical composition of steel plate 1 is III i content: (48/14
)(N(-0,002% of Nu)<%'i(%)< [4
, 0,6 (to) + 3.43 N (X)), and Nb
The content is Nb (%)) 2.00 (%) and 0.02
It should be less than 5%, and [%'i (%) + Nb (%)] ≦
It is more desirable to set it to 0.04 meC.
上記の如き本発明８Ｍ４？ｉは、第一に表面外ｍｌが４
伊めて良好である。この理由は、めっき鋼板の素地鋼板
化学成分を上記の如き構成とすること、およびかかる素
地鋼板成分の構成により浴中Ａｔを低下して溶融亜鉛め
っき可能とすることに依る。素地鋼板の化学成分限定に
よる効果は、かかる成分とすることにより、結晶粒界と
結晶粒内の合金化反応の相違が小さくなり均一化される
ことに依る。The present invention 8M4 as described above? i is firstly 4 ml outside the surface
It is in good condition for the first time. The reason for this is that the chemical composition of the base steel sheet of the plated steel sheet is as described above, and that the composition of the base steel sheet components lowers At in the bath to enable hot-dip galvanizing. The effect of limiting the chemical composition of the base steel sheet is due to the fact that by using such a composition, the difference between the alloying reactions at the grain boundaries and within the grains becomes smaller and more uniform.
更に、かかる成分とすることで、めつき／＊ 密着性が
向上するので低Ａｔ化してもｅｉＭ性が良好であり、ド
ロスの発生だけが抑制さＩＬるためである。Furthermore, by using such a component, the plating/*adhesion is improved, so even if the At is reduced, the eiM property is good, and only the generation of dross is suppressed.
第二に２本発明鋼板はプレス成形時の連続成形性が良好
となる。この理由は、全めっき層厚さの１／４〜３／４
と合金層とすることにより句滑性能が向上して連続成
形時にプレス金型へのメタルピックアップが抑制される
こと、加えて、素地鋼板成分系の限定により過合金増の
生成が抑１打すされるために連続成形時のめっき層剥離
が抑制されることによる。Secondly, the steel sheet of the present invention has good continuous formability during press forming. The reason for this is 1/4 to 3/4 of the total plating layer thickness.
By forming an alloy layer, smoothing performance is improved and metal pickup into the press mold is suppressed during continuous forming.In addition, the formation of overalloying is suppressed by limiting the composition of the base steel sheet. This is because peeling of the plating layer during continuous molding is suppressed.
第三の荷重は、上記の如く、めっき層密着性が良好な点
である。The third load, as mentioned above, is that the plating layer has good adhesion.
めつきｊ！１の全厚さく合金層と亜鉛層の合計厚さ）が
４μｍ未満とすることは高い耐食８：能を付与するとい
う観点から避ける必資があり、３０μｍを越えるとめつ
き層の加工性低下が犬きぐなる。Metsuki j! It is necessary to avoid making the total thickness (total thickness of the alloy layer and zinc layer) less than 4 μm from the viewpoint of imparting high corrosion resistance, and if it exceeds 30 μm, the workability of the plated layer decreases. Inu Kigunaru.
素地鋼板と亜鉛層の間に生成せしめる合金層の厚さはめ
っき層全厚の１／４〜３／４ が良い。１７′４未満で
は、良好な連続成形性が得られない。３Ａを越えると、
めっき順の着着性が劣化する。合金層の生成は全く均一
ではないので、ここに言う合金層厚さとは、板面の平均
としての板厚方向合金層厚さである。The thickness of the alloy layer formed between the base steel sheet and the zinc layer is preferably 1/4 to 3/4 of the total thickness of the plating layer. If it is less than 17'4, good continuous moldability cannot be obtained. If it exceeds 3A,
Adhesion of plating order deteriorates. Since the formation of the alloy layer is not uniform at all, the alloy layer thickness referred to herein is the thickness of the alloy layer in the thickness direction of the plate as an average of the plate surface.
素地鋼板の化学成分の限定理由は次の通りである。The reason for limiting the chemical composition of the base steel sheet is as follows.
０は０．００７％を越えると′ｓ４＆自体の加工性低下
が著しいので０．００７％以下とする。If 0 exceeds 0.007%, the workability of 's4& itself will deteriorate significantly, so it should be set to 0.007% or less.
ＳＬは０．１％を越えると溶融亜鉛のぬれ注が低下する
ので０．１％以下とする。If SL exceeds 0.1%, the wetting of molten zinc will decrease, so it is set to 0.1% or less.
Ｍｎは０．４％を越えると鋼天のｒ値が低下するので０
．４％以下とする。If Mn exceeds 0.4%, the r value of the steel sheet will decrease, so it should be 0.
．． 4% or less.
Ｐは０．０３％を越えると強匪の上昇が大きく加工性の
低下につながるため、０．０３％以下とする。If P exceeds 0.03%, the toughness increases significantly, leading to a decrease in workability, so P is set to 0.03% or less.
Ｓは含有量が多いと介在物の」１１加を招き好手しくな
く、０．０３％以下とする。If the content of S is too high, it may cause the addition of inclusions, which is undesirable, so it should be kept at 0.03% or less.
Ａｔは脱飯のために用いるが、含有量が高いと加工性の
低下が大きいため０．１％以下とする。At is used for rice removal, but if the content is high, the processability will be greatly reduced, so the content should be 0.1% or less.
Ｎは、０． ＯＯ７％を越えるとに４’ｊ加すべき′ｒ
ｉ情が多くなるのでｏ、 ｏ Ｏ７Ｘ以下とする。N is 0. 4'j should be added when OO exceeds 7%'r
Since there will be a lot of information, o, o O7X or below should be used.
以上に加え、素地鋼板の化学成分としてＴＩとＮｂを同
時に複合して含有することが必要である。In addition to the above, it is necessary to simultaneously contain TI and Nb as chemical components in the base steel sheet.
・■−にＴ１．Ｎｂは主として谷々Ｎ、ｃを析出せしめ
て鋼板の加工性、特に深絞り性を高める。Ｔｒ単独ある
いはＮｂ単独では、各々、めっき密着性の劣化および連
続成形性の低下ａ １ｉｌｉ板の加工性の低下が起こり
好ましくない。両者を同時に複合して含有する場合のみ
、良好な加工性、優れためっき密着性％良好なプレス時
の連続成形性が得られる。・■-T1. Nb mainly precipitates N and c to improve the workability of the steel sheet, especially the deep drawability. Tr alone or Nb alone is undesirable because it causes deterioration in plating adhesion, deterioration in continuous formability, and deterioration in workability of the a 1ili plate. Only when both are contained in combination at the same time, good workability, excellent plating adhesion, and good continuous formability during pressing can be obtained.
Ｔ’ｂｉ：ｉハ ０． ＯＯ３％未満では加工性が劣化
し、０、０４％を紹えると過合金増が成長し易くなって
めっき層密着性および連続成形性が劣るので、ｏ、 ｏ
Ｏ３Ｘ≦Ｔｉ（％）≦０．０４％とする。T'bi:iha 0. If OO is less than 3%, the workability will deteriorate, and if it is introduced to 0 or 04%, overalloying will tend to grow and the plating layer adhesion and continuous formability will be poor, so o, o
O3X≦Ti (%)≦0.04%.
Ｎｂ ｆｆ１ｌ−１，０−００３Ｘ未ｉｉｆＭ テ（４
、Ｔｉ＆が多く含４１゛さｒＬる際は過合金）ｊが成長
し易くなってめっき層゛腎着性および連続成形性が劣り
、′Ｌ′ｉ量が少ない場合は加工性が劣る。また、 Ｎ
ｂ量が０．０４Ｘを越えると加工性が低下する。従って
、０．００３％≦Ｎｂ（％）≦０゜０４ Ｘ （１）範
囲とする。Nb ff1l-1,0-003XuniifM te(4
When the content of Ti and Ti is large, the overalloy ()j tends to grow, resulting in poor adhesion and continuous formability of the plating layer, and when the amount of Ti is small, the workability is poor. Also, N
When the amount b exceeds 0.04X, workability decreases. Therefore, the range is 0.003%≦Nb(%)≦0°04× (1).
′Ｊ″ｉ、 Ｎｂ含有ｔｆｆ：（４ｓ／１４）〔Ｎ（％
） −（ＬＯＯ２％） ＜ ｉ’ ＋ （％）＜［、Ｏ
，Ｃ（先）＋３．４３Ｎ（％）〕 とし、 Ｎｂ含有量
とＮｂ（％）＞２．００（％）で、かつ０．０２５％未
満とし、さらに（Ｔｉ（％）＋Ｎｂ（％）〕≦０．０４
％とすることによって、以上の傾向は更に顕著になるの
で、最も宅ましい。'J''i, Nb containing tff: (4s/14) [N (%
) −(LOO2%) <i' + (%) <[, O
, C (first) + 3.43N (%)], Nb content and Nb (%) > 2.00 (%) and less than 0.025%, and (Ti (%) + Nb (%)) ≦0.04
%, the above tendency becomes even more remarkable, which is the most dangerous.
これらの成分に加えて、たとえばＢなどを必要に応じ添
加することは可Ｈ目である。In addition to these components, it is possible to add, for example, B or the like, if necessary.
次に製造法としては、めっき浴中のＡｔを０．０２〜０
．２０％にするのであるが、０．０２Ｘ未（＋Ｎでは合
金１の生成が迅速になり、後述の如き加熱温間。Next, as a manufacturing method, At in the plating bath is 0.02 to 0.
．． 20%, but if it is less than 0.02
時間では合金／＃厚の調型が工業的に難しくなる。In terms of time, it becomes industrially difficult to shape the alloy/# thickness.
０．２０％を越えると合金層の生成がｄれ、後述り）如
き加熱温度１時間では工業的に合金層厚の調埜が難しく
なり、さらにドロスの発生が顕著になって表面外蜆が劣
る。最も好ましい範囲は０．０２〜０．１８Ｘの範囲で
ある。If it exceeds 0.20%, the formation of the alloy layer will be delayed, and it will be difficult to adjust the thickness of the alloy layer industrially at the heating temperature of 1 hour (described later), and furthermore, the generation of dross will become noticeable and the outer surface will be damaged. Inferior. The most preferred range is 0.02-0.18X.
めっき浴中のｐｂは、０．ＩＸを越えるとス、ｅングル
模様が発生し、美麗な表面が得られず、また密台注が経
時劣化するので、０．１％以下とする。PB in the plating bath is 0. If it exceeds IX, a grungy pattern will occur, making it impossible to obtain a beautiful surface, and the adhesive will deteriorate over time, so the content should be 0.1% or less.
めっき浴ｆｌＡ ＩＪＪｆはｉ：３ｏ 〜５００ｃＴあ
るが、前記のごとくめっき層Ｊ！＃ ４〜３０μｍに調
整するために、めっき金属のｔＡｆ、動性からこの範囲
の浴温か好−チしい。The plating bath flA IJJf has i:3o~500cT, but as mentioned above, the plating layer J! # In order to adjust the thickness to 4 to 30 μm, a bath temperature within this range is preferred due to the tAf and kinetics of the plating metal.
次に上記のごとくめつきしためっき鋼板を加熱してめっ
き層の下ＲｆＪｔ＠Ｉ ｋ合金化するのであるが、その
加熱Ｗｉ髪は飯温４２０〜６００℃である。この中性に
おいて、０１ｆ記のととくｔめっき層（亜鉛層及び合金
層の合計４ ）！？−）中の合金ＨＪ）早を全めっき層
厚の１７′４〜３／４ （以後合金層厚比１／４〜３／
４と、＋＋３す）になる様好ましく処理することができ
る。この工うな飯温であれは、例えば連続処理の場合は
加熱時１１■は１０〜６０秒である。又、ここでいう合
金層とはｐｅ址として６嵐遺％以上含有されているもの
で必る。Next, the plated steel plate plated as described above is heated to form an RfJt@Ik alloy under the plating layer, and the heating temperature is 420 to 600°C. In this neutral state, the special T plating layer (total of 4 layers of zinc layer and alloy layer) described in 01f! ? -) alloy HJ) early is 17'4 to 3/4 of the total plating layer thickness (hereinafter alloy layer thickness ratio 1/4 to 3/
4, ++3). For example, in the case of continuous processing, the heating time is 10 to 60 seconds at this temperature. Furthermore, the alloy layer referred to herein must be one containing 6% or more of PE.
本発明めっき鋼板ンよ廿爺増ノ早比１／４〜３／４にす
るものであるが１合金／ｄ厚比１ ／’ ４禾掬となる
休なめっき後の加熱処理では、Ｉ’１４１１＃特性の向
上は顕著でなく、連続成形性は劣る。又１合金ノー厚比
が３／４を越えるまでめっき後加熱処理を行うと、プレ
ス成形時にめっき層の剥離が発生しやすくなる。％９Ｅ
って、本発明めっき鋼板はｒｊｉＪ記の如く＃惚亜メ１
めつきを施し、加熱して下ノーを合金化したものでない
と、連続成形性ｅよ向上しない。In the present invention, the plated steel sheet is made to have an early thickness ratio of 1/4 to 3/4, but in the heat treatment after rest, which results in an alloy/d thickness ratio of 1/'4, I' The improvement in 1411# properties was not remarkable, and the continuous moldability was poor. Furthermore, if heat treatment is performed after plating until the no-thickness ratio of 1 alloy exceeds 3/4, peeling of the plating layer is likely to occur during press molding. %9E
So, the plated steel sheet of the present invention is as described in RjiJ #LoveAme1
Unless the lower layer is alloyed by plating and heating, the continuous formability will not improve as much as e.
この際に、素地ｍ板の化学成分が前記のごとき条ＰＦを
満足しないと、優れた表面外咲と径ルためつきノー密着
性と同時に満足することｅよできない。In this case, unless the chemical composition of the base plate satisfies the above-mentioned PF, it will not be possible to simultaneously satisfy the excellent outer surface bloom and the no-flooding adhesion property.
即ち、本発明の目的とする高品賀ｋｊ融亜珀めっき鋼板
ｔ−得るには、めっき増の一部と合金化せしめることに
力０えて、メく地−敗の化学成分ｔ Ｍｉｄ連の如く限
定すること、それによって低い浴中のｋｌ濃度でも密＃
性を確保することが可曲となり、ドロス発生のない東鹿
な衣面外１睨を付与することができる。換ｇすれば、め
っき増の一部合金化処理。That is, in order to obtain the high-quality aluminium-plated steel sheet that is the object of the present invention, it is necessary to alloy it with a part of the plating, and the chemical composition of the base is limited as in the Mid series. , so that even low Kl concentrations in the bath can be
It is flexible to ensure the flexibility, and it is possible to give a single glance outside the costume surface without generating dross. In other words, it is a partial alloying treatment with increased plating.
素地＠仮の化学成分の限定、低い浴中λを良曲の３栄１
％”を同時にｒ４足することが必須条注であり。Base material @ Temporary chemical composition limitation, low bath λ, good song 3 Sakae 1
It is essential to add r4 to ``%'' at the same time.
これによってはじめて目的とする潰れた亜鉛めっき鋼板
が可能となるのである。従来、これら３条件を満足した
合金化溶融亜鉛めっき鋼板およびその製造法は開示され
ておらず、本発明は他めて優位なものである。Only through this process can we achieve the desired flattened galvanized steel sheet. Conventionally, an alloyed hot-dip galvanized steel sheet that satisfies these three conditions and a method for producing the same have not been disclosed, and the present invention is superior to the others.
（実施例）
第１表に示す成分で板厚０．８ｍｍの冷延鋼板を常法に
よって製造し、第２表に示すめっき条件によってゼンジ
マー型連続亜鉛めっきラインにより。(Example) A cold-rolled steel plate with a thickness of 0.8 mm was produced using the ingredients shown in Table 1 using a conventional method, and was coated on a Sendzimer type continuous galvanizing line under the plating conditions shown in Table 2.
溶融亜鉛めっき鋼板を製造した。めっき鋼板の加工性、
連続成形性、めっき層密着性、ドロス発生の有無を評価
した結果を第２表に示す。A hot-dip galvanized steel sheet was manufactured. Processability of plated steel sheets,
Table 2 shows the results of evaluation of continuous moldability, plating layer adhesion, and presence or absence of dross generation.
第２表に示す結果から明らかな如く、本発明レリのもの
はいずれも各特性において優れた結果が得られており％
従来法に対して発明の目的通りの優位性を有するもので
ある。As is clear from the results shown in Table 2, all of the products of the present invention have excellent results in each characteristic.
This method has advantages over the conventional method according to the purpose of the invention.
（発明の効果ン
かくすることにより、プレス成形往時金型への亜鉛付宥
を防止して１品′Ｊｔｌ！ｉｌ−向上することができる
。父、めっき密着性の向上ができ、この点からの品買を
向上することができる等の優れた効果が得られる。(By doing so, it is possible to prevent zinc from being attached to the mold during press molding and improve the quality of each product.) The adhesion of the plating can be improved, and from this point of view Excellent effects such as improved product purchasing can be obtained.
第１図は１本発明のめつき′Ａ４仮の断面説明図である
。
１・・・鋼板、２・・・合金層、３・・・ｄ［鉛層、４
・・・合金層厚さ。
代理人 弁理士 秋 火 政 光
他２名
’７ｉｒ図
自発手続補正書
昭和６１年１月λＯ日FIG. 1 is a temporary cross-sectional view of plating 'A4' according to the present invention. DESCRIPTION OF SYMBOLS 1... Steel plate, 2... Alloy layer, 3... d [lead layer, 4
...Alloy layer thickness. Agent Patent Attorney Aki Tue Masamitsu and 2 others '7ir Figure Voluntary Procedure Amendment January 19861 λO date
Claims (4)
つき層厚を片面当り４〜３０μｍ被覆し、鋼板と亜鉛層
の間に存在する合金層厚を全めつき層厚の１／４〜３／
４にしたことを特徴とする合金化溶融亜鉛めつき鋼板。(1) C: 0.007% or less, Si: 0.1% or less, Mn: 0.4% or less, P: 0.03% or less, S: 0.03% or less, Al: 0.1% or less , N: 0.007% or less, Ti: 0.003% or more and 0.04% or less, Nb: 0.003% or more and 0.04% or less, the balance being Fe and unavoidable impurities. The thickness is 4 to 30 μm per side, and the thickness of the alloy layer between the steel sheet and the zinc layer is completely plated to 1/4 to 3/3 of the layer thickness.
4. An alloyed hot-dip galvanized steel sheet.
〕超〔４．０Ｃ（％）＋３．４３Ｎ（％）〕未満、Ｎｂ
：２．０％超０．０２５％未満とし、更に 〔Ｔｉ（％）＋Ｎｂ（％）〕≦０．０４％ とした特許請求の範囲第１項記載の合金化溶融亜鉛めつ
き鋼板。(2) Ti: (48/14) [N (%) - 0.002%
]Super [less than 4.0C (%) + 3.43N (%)], Nb
: more than 2.0% and less than 0.025%, and [Ti (%) + Nb (%)]≦0.04%.
０．０２〜０．２０％、 Ｐｂ：０．１％以下、 残部不純物およびＺｎからなる４３０〜５００℃のめつ
き浴へ導き、全めつき層厚４〜３０μｍのめつきを施し
、次いで板温４２０〜６００℃に加熱し、鋼板と亜鉛層
の間に存在する合金層厚を全めつき層厚の１／４〜３／
４生成せしめることを特徴とする合金化溶融亜鉛めつき
鋼板の製造方法。(3) C: 0.007% or less, Si: 0.1% or less, Mn: 0.4% or less, P: 0.03% or less, S: 0.03% or less, Al: 0.1% or less , N: 0.007% or less, Ti: 0.003% or more and 0.04% or less, Nb: 0.003% or more and 0.04% or less, the balance being Fe and inevitable impurities, and Al:
0.02-0.20%, Pb: 0.1% or less, and the remainder impurities and Zn. Heating to a temperature of 420 to 600℃, the thickness of the alloy layer existing between the steel plate and the zinc layer is completely plated to 1/4 to 3/ of the layer thickness.
4. A method for producing an alloyed hot-dip galvanized steel sheet.
〕超〔４．０Ｃ（％）＋３．４３Ｎ（％）〕未満、Ｎｂ
：２．０％超０．０２５％未満とし、更に 〔Ｔｉ（％）＋Ｎｂ（％）〕≦０．０４％ とした特許請求の範囲第３項記載の合金化溶融亜鉛めつ
き鋼板の製造方法。(4) Ti: (48/14) [N (%) -0.002%
]Super [less than 4.0C (%) + 3.43N (%)], Nb
: more than 2.0% and less than 0.025%, and furthermore, [Ti (%) + Nb (%)]≦0.04% The method for producing an alloyed hot-dip galvanized steel sheet according to claim 3 .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28330085A JPS62142755A (en) | 1985-12-17 | 1985-12-17 | Alloyed hot dip galvanized steel sheet and its manufacture |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28330085A JPS62142755A (en) | 1985-12-17 | 1985-12-17 | Alloyed hot dip galvanized steel sheet and its manufacture |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS62142755A true JPS62142755A (en) | 1987-06-26 |
Family
ID=17663664
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28330085A Pending JPS62142755A (en) | 1985-12-17 | 1985-12-17 | Alloyed hot dip galvanized steel sheet and its manufacture |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS62142755A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0613961A1 (en) * | 1993-03-04 | 1994-09-07 | Kawasaki Steel Corporation | Alloyed hot dip galvanized steel sheet |
| JP2007500285A (en) * | 2003-07-29 | 2007-01-11 | フェストアルピネ シュタール ゲーエムベーハー | Method for manufacturing hardened steel parts |
| US20110006491A1 (en) * | 2008-01-15 | 2011-01-13 | Arcelormittal France | Process for manufacturing stamped products, and stamped products prepared from the same |
-
1985
- 1985-12-17 JP JP28330085A patent/JPS62142755A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0613961A1 (en) * | 1993-03-04 | 1994-09-07 | Kawasaki Steel Corporation | Alloyed hot dip galvanized steel sheet |
| JP2007500285A (en) * | 2003-07-29 | 2007-01-11 | フェストアルピネ シュタール ゲーエムベーハー | Method for manufacturing hardened steel parts |
| US20110006491A1 (en) * | 2008-01-15 | 2011-01-13 | Arcelormittal France | Process for manufacturing stamped products, and stamped products prepared from the same |
| US8733142B2 (en) * | 2008-01-15 | 2014-05-27 | Arcelormittal France | Process for manufacturing stamped products, and stamped products prepared from the same |
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