JP3229921B2 - Steel sheet for deep drawing and surface-treated steel sheet with excellent perforation resistance - Google Patents
Steel sheet for deep drawing and surface-treated steel sheet with excellent perforation resistanceInfo
- Publication number
- JP3229921B2 JP3229921B2 JP28378995A JP28378995A JP3229921B2 JP 3229921 B2 JP3229921 B2 JP 3229921B2 JP 28378995 A JP28378995 A JP 28378995A JP 28378995 A JP28378995 A JP 28378995A JP 3229921 B2 JP3229921 B2 JP 3229921B2
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- steel sheet
- deep drawing
- less
- resistance
- steel
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Description
【０００１】[0001]
【発明の属する技術分野】この発明は、自動車の外板パ
ネル等の使途に適した深絞り用材料に関し、特にプレス
加工性のほか、耐孔あき性に優れる冷延鋼板（以下、単
に「鋼板」と略記する。）に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deep drawing material suitable for use as an outer panel of an automobile and the like, and particularly to a cold rolled steel sheet (hereinafter simply referred to as "steel sheet") having excellent press workability and excellent perforation resistance. abbreviated as ".) to it relates.
【０００２】[0002]
【従来の技術】従来、自動車外板などのように良好な成
形性が要求される部位に用いられる鋼板としては、鋼中
Ｃ量を0.005 wt％程度の微少量に低減し、かつTi, Nbお
よびＢなどの炭化物成形元素を添加して鋼中Ｃを固定
し、これによって、プレス加工性を向上させた極低炭素
鋼板が一般に使用されることが多くなってきている。こ
のように極低炭素鋼板の使用量が増大した理由は、鋼板
自身が優れた成形特性を有していることのほか、特に最
近の極低炭素鋼の溶製技術の進歩と相まって、材質上の
制約から極低炭素鋼板を使用せざるを得ない連続焼鈍法
が普及したことなどの製造技術の進歩が挙げられる。一
方、耐食性が要求される部位に用いられる鋼板として
は、Cu, Ni, Ｐを添加した耐候性鋼板が一般的であり、
例えば、特公平５−30899 号公報には極低炭素鋼にCu,
Ｐを添加してリン酸塩化成処理性を向上させた鋼板が開
示されている。また、特公平１−53344 号公報には成形
性の優れた高耐食性鋼板が開示されている。2. Description of the Related Art Conventionally, as a steel sheet used for a part where good formability is required, such as an automobile outer panel, the C content in steel is reduced to a very small amount of about 0.005 wt%, and Ti, Nb Ultra-low carbon steel sheets which add C and B and other carbide forming elements to fix C in the steel and thereby improve the press workability have been increasingly used in general. The reason for the increase in the use of ultra-low carbon steel sheets in this way is that, in addition to the excellent forming properties of the steel sheets themselves, especially in conjunction with recent advances in smelting technology for ultra-low carbon steels, Due to the restrictions on the use of ultra-low carbon steel sheets, the continuous annealing method has become widespread. On the other hand, as a steel sheet used for a part where corrosion resistance is required, a weather-resistant steel sheet to which Cu, Ni, and P are added is generally used.
For example, Japanese Patent Publication No. 5-30899 discloses that extremely low carbon steel is made of Cu,
A steel sheet in which P is added to improve the phosphatization treatment property is disclosed. Japanese Patent Publication No. 1-53344 discloses a high corrosion-resistant steel sheet having excellent formability.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上記従
来技術のうち、特公平５−30899 号公報に開示のもの
は、リン酸塩処理性は改善されているものの、耐孔あき
性は満足できる状態にはない。特にＳ含有量の高い組成
例ではこの傾向が顕著である。また、上記従来技術の特
公平１−53344 号公報は、Cr含有量が高いため、リン酸
塩化成処理性が悪く、塗装を施して使用される自動車用
鋼板としては不適当である。さらに、これらの従来技術
はいずれも、CuやCrなど高価な元素を多量に添加する必
要があるため、鋼板自体が高価である。また、CuやCrを
含有するとスクラップから除去することが困難となりリ
サイクル時に不利である。However, among the above-mentioned prior arts, the one disclosed in Japanese Patent Publication No. 5-30899 has improved phosphatability but satisfactory pitting resistance. Not in This tendency is particularly remarkable in a composition example having a high S content. Further, Japanese Patent Publication No. 1-53344 of the above-mentioned prior art has a high Cr content and therefore has poor phosphate chemical treatment properties, and is unsuitable as a coated steel sheet for automobiles. Further, in each of these conventional techniques, since a large amount of expensive elements such as Cu and Cr must be added, the steel sheet itself is expensive. Further, if Cu or Cr is contained, it is difficult to remove it from scrap, which is disadvantageous at the time of recycling.
【０００４】本発明の目的は、従来技術が抱えているこ
のような問題点に鑑み、プレス加工性やリサイクル性を
害することなく、耐孔あき性を改善した深絞り用鋼板を
提供することにある。本発明の他の目的は、従来技術が
抱えているこのような問題点に鑑み、プレス加工性やリ
サイクル性を害することなく、耐孔あき性とともにリン
酸塩化成処理性にも優れた深絞り用鋼板を提供すること
にある。An object of the present invention is to provide a deep-drawing steel sheet having improved perforation resistance without impairing press workability and recyclability, in view of the above-mentioned problems of the prior art. is there. Another object of the present invention, prior art view of the problems are having, without prejudice to the press workability and recyclability, excellent deep drawing in the phosphate chemical conversion treatability with anti apertured resistance It is to provide a steel sheet for use.
【０００５】[0005]
【課題を解決するための手段】本発明者らは、上掲の目
的を実現すべく実験, 検討を重ねた結果、極低炭素鋼板
のＳ含有量を一定量以下に下げると共に、ＰをＳ含有量
の５倍以上添加すること、また、さらにSbを添加するこ
とによって、加工性を損なわずに耐孔あき性とリン酸塩
化成処理性を、従来の極低炭素鋼板よりも格段に向上さ
せ得ることを見い出し、この発明を完成するに至った。
その要旨構成は下記のとおりである。The inventors of the present invention have conducted experiments and studies to achieve the above object, and as a result, have reduced the S content of the ultra-low carbon steel sheet to a certain level or less, and reduced P to S. By adding more than 5 times the content, and further adding Sb, the perforation resistance and the phosphatization are significantly improved without impairing the workability compared to conventional ultra-low carbon steel sheets. They have found that they can do this, and have completed this invention.
The summary structure is as follows.
【０００６】(1) Ｃ≦0.005 wt％、Si≦0.05wt％、Mn≦
0.3 wt％、Ｐ：0.01〜0.05wt％、Ｓ：0.001 〜0.01wt
％、Al≦0.05wt％を含有し、かつTi, NbおよびＢのうち
から選ばれる１種または２種以上を0.005 〜0.15wt％の
範囲内で含有し、しかもＰとＳとはその比Ｐ(wt%)/Ｓ(w
t%) が５以上を満足するように含有し、残部がFeおよび
不可避的不純物よりなる耐孔あき性に優れる深絞り用鋼
板。(1) C ≦ 0.005 wt%, Si ≦ 0.05 wt%, Mn ≦
0.3 wt%, P: 0.01-0.05 wt%, S: 0.001-0.01 wt
%, Al ≦ 0.05 wt%, and one or more selected from Ti, Nb and B in the range of 0.005 to 0.15 wt%, and P and S have a ratio P (wt%) / S (w
(t%) satisfying 5 or more, and the balance is Fe and unavoidable impurities.
【０００７】(2) Ｃ≦0.005 wt％、Si≦0.05wt％、Mn≦
0.3 wt％、Ｐ：0.01〜0.05wt％、Ｓ：0.001 〜0.01wt
％、Al≦0.05wt％、Sb：0.001 〜0.06wt％を含有し、か
つTi, NbおよびＢのうちから選ばれる１種または２種以
上を0.005 〜0.15wt％の範囲内で含有し、しかもＰとＳ
とはその比Ｐ(wt%)/Ｓ(wt%) が５以上を満足するように
含有し、残部がFeおよび不可避的不純物よりなる耐孔あ
き性に優れる深絞り用鋼板。(2) C ≦ 0.005 wt%, Si ≦ 0.05 wt%, Mn ≦
0.3 wt%, P: 0.01-0.05 wt%, S: 0.001-0.01 wt
%, Al ≦ 0.05 wt%, Sb: 0.001 to 0.06 wt%, and one or more selected from Ti, Nb and B in the range of 0.005 to 0.15 wt%, and P and S
Is a steel sheet for deep drawing which is contained in such a ratio that P (wt%) / S (wt%) satisfies 5 or more, and whose balance is Fe and unavoidable impurities and has excellent puncture resistance.
【０００８】[0008]
【０００９】[0009]
【発明の実施の形態】本発明は、自動車外板などに供す
る深絞り用鋼板および深絞り用表面処理鋼板は、鋼板自
身のプレス加工性, すなわち深絞り性を確保した上で、
耐孔あき性とリン酸塩化成処理性の両方の特性を付与す
るすることが必要であるという考え方に基づいて開発し
たものであ。発明者らは、このような考え方に基づき、
特にＳの量およびＳとＰの量的な関係（Ｐ(wt%)/Ｓ(wt
%) ) に着目した。すなわち、これらの関係を適正範囲
内に制御すれば、高価な添加元素を使うまでもなく、優
れた深絞り性（プレス加工性）のほか、耐孔あき性およ
びリン酸塩化成処理性のバランスが実現されることを知
見した。BEST MODE FOR CARRYING OUT THE INVENTION The present invention provides a steel sheet for deep drawing and a surface-treated steel sheet for deep drawing to be used for automobile outer panels, etc.
It was developed based on the idea that it is necessary to impart both porosity resistance and phosphate chemical conversion properties. The inventors based on such a concept,
In particular, the amount of S and the quantitative relationship between S and P (P (wt%) / S (wt
%)). In other words, if these relationships are controlled within an appropriate range, it is not necessary to use expensive additional elements, and in addition to excellent deep drawability (press workability), balance between perforation resistance and phosphatization treatment. Was realized.
【００１０】以下に、本発明において、Ｐ(wt%)/Ｓ(wt
%) の比に着目した理由について説明する。Ｓは、硫化
物を形成し錆の起点を多くしたり、生成錆を粗雑にして
耐食性を劣化させる元素であり極力少なくする必要があ
るが、脱Ｓ技術にも限界があり費用もかかるので、実用
的には0.001 wt％が下限である。そこで、この条件下で
も耐食性の劣化を抑制するべく鋭意研究した結果、Ｐを
Ｓの５倍以上添加するとＳの悪影響を打ち消すことがで
きることがわかった。この理由は、生成する錆層が非常
に緻密になり、強固に鋼板表面に付着するため、錆層が
バリヤーとなり腐食促進物質（水, 酸素, 塩など）の侵
入を防ぐものと考えられる。Hereinafter, in the present invention, P (wt%) / S (wt
The reason for focusing on the ratio of (%) will be described. S is an element that forms sulfides to increase the starting point of rust or to coarsen the generated rust to deteriorate the corrosion resistance, and it is necessary to reduce it as much as possible. Practically, the lower limit is 0.001 wt%. Therefore, as a result of intensive studies to suppress the deterioration of corrosion resistance even under these conditions, it was found that the adverse effect of S can be counteracted by adding P five times or more of S. It is considered that the reason for this is that the rust layer formed becomes very dense and adheres firmly to the steel sheet surface, so that the rust layer acts as a barrier and prevents the penetration of corrosion promoting substances (water, oxygen, salts, etc.).
【００１１】次に、各成分の組成を限定した理由を以下
に説明する。 Ｃ：0.005 wt％以下 Ｃは、優れたプレス加工性（絞り加工性）を得るために
は、できるだけ少なくする必要があり、0.005 wt％以下
に規制するが、0.003 wt％以下にすることが好ましい。Next, the reasons for limiting the composition of each component will be described below. C: 0.005 wt% or less C must be reduced as much as possible in order to obtain excellent press workability (drawing workability), and is regulated to 0.005 wt% or less, but is preferably 0.003 wt% or less. .
【００１２】Si：0.05wt％以下、Mn：0.3 wt％以下 SiおよびMnは、製鋼上必要な成分であるが、あまり多量
に含まれると加工性の劣化を招くので、Siは0.05wt％以
下、好ましくは0.03wt％以下とし、一方、Mnは0.3 wt％
以下、好ましくは 0.2wt％以下に規制する。Si: 0.05 wt% or less, Mn: 0.3 wt% or less Si and Mn are necessary components for steelmaking. However, if contained in a large amount, the workability is deteriorated. Therefore, Si is 0.05 wt% or less. , Preferably 0.03 wt% or less, while Mn is 0.3 wt%
Or less, preferably 0.2 wt% or less.
【００１３】Ｐ：0.01〜0.05wt％ Ｐは、耐孔あき性を向上させる元素であって、上述した
ように、ＰとＳとの重量比Ｐ(wt%)/Ｓ(wt%) は５以上に
なるように成分調整をすることが必要である。このこと
に加えて、本発明では、このＰの含有量が0.05wt％を超
えると、リン酸塩化成処理性や脆性が劣化する。一方、
0.01wt％未満では耐孔あき性の向上に効果が認められな
い。なお、好ましい範囲は0.02〜0.05wt％である。P: 0.01 to 0.05 wt% P is an element for improving the puncture resistance. As described above, the weight ratio of P to S, P (wt%) / S (wt%), is 5%. It is necessary to adjust the components as described above. In addition to this, in the present invention, if the content of P exceeds 0.05 wt%, the phosphatization and the brittleness deteriorate. on the other hand,
If it is less than 0.01 wt%, no effect is observed in improving the puncture resistance. The preferred range is 0.02 to 0.05 wt%.
【００１４】Ｓ：0.001 〜0.01wt％ Ｓは、耐孔あき性を劣化させるため、少ない方が好まし
い。すなわち、このＳが0.01wt％を超えると、Ｐの必要
添加量が増し、偏析等の問題が生じると共に、その改善
のためには高価なCuやNiなどの添加が必要となるので、
上限を0.01wt％とした。しかしながら、このＳを下げす
ぎても効果の向上にはつながらないばかりでなく、脱Ｓ
に要する費用が嵩み経済的に不利になるので、下限を0.
001 wt％とした。S: 0.001 to 0.01 wt% Since S deteriorates the perforation resistance, it is preferable that S is small. That is, if this S exceeds 0.01 wt%, the required amount of P increases, causing problems such as segregation and the like. In order to improve the problem, it is necessary to add expensive Cu or Ni.
The upper limit was made 0.01 wt%. However, lowering this S too much does not only lead to an improvement in the effect, but also reduces the S
Cost is high and economically disadvantageous, so the lower limit is 0.
001 wt%.
【００１５】Al：0.05wt％以下 Alは、脱酸剤として鋼の清浄化に必要な元素であるが、
一方で鋼の耐食性を劣化させるので、上限を0.05wt％に
規制した。Al: 0.05 wt% or less Al is an element necessary for cleaning steel as a deoxidizing agent.
On the other hand, the corrosion resistance of steel deteriorates, so the upper limit was restricted to 0.05 wt%.
【００１６】Ti, Nb, Ｂ：合計で0.005 〜0.15wt％ これらの成分はいずれも炭化物形成元素であって、鋼中
のＣを炭化物として固定し、これによって優れた絞り性
を得るために必要な元素である。これらの成分が合計で
0.005 wt％未満では上述の効果が得られず、一方、0.15
wt％を超えて添加してもそれ以上効果は向上せず、逆に
絞り成形性を劣化させてしまう。したがって、Ti, Nb,
Ｂの添加は合計で0.005 〜0.15wt％の範囲内とした。な
お、これらはいずれか１種のみを単独で添加しても良
い。好ましい範囲は0.01〜0.1 wt％である。Ti, Nb, B: 0.005 to 0.15 wt% in total These components are all carbide forming elements and are necessary for fixing C in steel as carbide and thereby obtaining excellent drawability. Element. These components in total
At less than 0.005 wt%, the above effects cannot be obtained.
Even if it is added in excess of wt%, the effect is not further improved, and conversely, the drawability is deteriorated. Therefore, Ti, Nb,
B was added in a total range of 0.005 to 0.15 wt%. In addition, only one of these may be added alone. The preferred range is 0.01-0.1 wt%.
【００１７】Sb：0.001 〜0.06wt％ Sbは、焼鈍時にSiやMnが鋼板表面に濃化するのを抑制す
る効果を有する。その効果は、添加量が0.001 wt％未満
ではあらわれず、また0.06wt％を超えてもさらなる効果
が発揮されず、経済的に不利となる。したがって、Sbの
添加は0.001 〜0.06wt％とする。なお、好ましい範囲は
0.002 〜0.02wt％である。Sb: 0.001 to 0.06 wt% Sb has the effect of suppressing the concentration of Si and Mn on the steel sheet surface during annealing. The effect does not appear if the added amount is less than 0.001 wt%, and if it exceeds 0.06 wt%, no further effect is exhibited, which is economically disadvantageous. Therefore, the addition of Sb is made 0.001 to 0.06 wt%. The preferred range is
0.002 to 0.02 wt%.
【００１８】上述した成分組成の鋼板は、転炉等で溶製
したスラブを直接又は加熱後、熱間圧延し、酸洗、冷間
圧延および焼鈍の各工程を経る一般的な工程により製造
される。各工程の製造条件はとくに定める必要はなく、
常法に従って行えばよい。また、このようにして製造し
た鋼板への亜鉛系めっき層の形成は、鋼板の少なくとも
一方の面に、電気めっき（１０〜６０ｇ／ｍ2 程度）ま
たは溶融めっき（３０〜９０ｇ／ｍ2 程度）することに
よって得られ、それらの製造条件もとくに定める必要は
なく、常法にしたがって行えばよい。The steel sheet having the above-mentioned composition is manufactured by a general process including hot rolling, directly pickling, cold rolling and annealing a slab produced by a converter or the like, followed by heating. You. The manufacturing conditions for each process do not need to be specified,
What is necessary is just to carry out according to a usual method. The formation of the thus galvanized layer to manufacture the steel sheet, on at least one surface of the steel sheet, electroplating (10 to 60 g / m 2 or so) or hot dipping (30~90g / m 2 approximately) The production conditions do not need to be specified, and may be determined according to a conventional method.
【００１９】[0019]
【実施例】表１および表２に示す成分組成の鋼を、真空
溶解により溶製してスラブとし、1250℃に加熱して仕上
温度 910℃となるように熱間圧延して板厚3.5 mmの熱延
板としたのち空冷した。次に、この熱延板を80℃の10％
塩酸中で酸洗して鋼板表面のスケールを除去した後、0.
7 mmの板厚にまで冷間圧延した。引き続き、電解脱脂に
より表面に付着した圧延油を除去した後、5 ％水素の窒
素雰囲気( 露点−30℃) 中にて800 ℃に加熱して１分間
保持し、その後窒素ガス雰囲気にて30℃／sec.で冷却す
る焼鈍を行い、供試鋼板を作製した。 EXAMPLE A steel having the composition shown in Tables 1 and 2 was melted by vacuum melting to form a slab, which was heated to 1250 ° C. and hot-rolled to a finishing temperature of 910 ° C. to a thickness of 3.5 mm. And then air-cooled. Next, this hot rolled sheet is 10% of 80 ℃
After removing the scale on the surface of the steel sheet by pickling in hydrochloric acid, 0.1%
It was cold rolled to a thickness of 7 mm. Subsequently, the rolling oil adhering to the surface was removed by electrolytic degreasing, heated to 800 ° C in a 5% hydrogen nitrogen atmosphere (dew point −30 ° C) and held for 1 minute, and then 30 ° C in a nitrogen gas atmosphere. / Sec. Was performed to produce a test steel sheet .
【００２０】[0020]
【表１】 [Table 1]
【００２１】[0021]
【表２】 [Table 2]
【００２２】上記の各鋼板について、次の試験を行っ
て、本発明の作用効果を確認した。 ａ．耐孔あき性については、各供試材を裸（無処理）の
状態で沖縄の海岸に18ケ月曝露し、錆を除去した後の板
厚減少値（ｍｍ）を測定して評価した。 ｂ．プレス加工性については、エリクセン社の深絞り試
験機を用いて限界絞り比（ＬＤＲ＝絞り抜け可の最大ブ
ランク径／ポンチ径）を測定して評価した。その評価基
準は次のとおりである。 ＬＤＲ 1.8 未満 ＝ × 1.8 〜2.0 未満 ＝ △ 2.0 〜2.2 未満 ＝ ○ 2.2 以上 ＝ ◎ 測定条件は、ポンチ径：33mmφとし、しわ押さえ力：50
0 kgとし、通常の防錆油を塗油した状態で試験した。 ｃ．リン酸塩化成処理については、処理液としては日本
パーカライジング社製パルボンドＰＢ−3020を用い、浸
漬法にてリン酸塩化成処理した。そして、処理後の各供
試鋼板のリン酸塩化成処理皮膜について、単位面積当た
りの析出リン酸塩結晶数、結晶サイズ、結晶形状を調
べ、リン酸塩化成処理性を総合的に評価した。なお、こ
のときの評価基準は次のとおりである。 ◎印：優 ○印：良 △印：やや劣る ×印：劣るEach of the above steelsOn a boardThe following test was conducted
The effect of the present invention was confirmed.. a. Regarding the puncture resistance, each test material was bare (untreated).
After exposure to the coast of Okinawa for 18 months and removing rust
The thickness reduction value (mm) was measured and evaluated.. b. For press workability, Erichsen's deep drawing test
Limiting ratio (LDR = maximum aperture that can be pulled out)
(Rank diameter / punch diameter) was measured and evaluated. The evaluation base
The criteria are as follows. LDR less than 1.8 = × less than 1.8 to less than 2.0 = △ less than 2.0 to less than 2.2 = ○ 2.2 or more = ◎ Measurement conditions: punch diameter: 33 mmφ, wrinkle holding force: 50
The test was performed in a state where the weight was set to 0 kg and a normal rust preventive oil was applied. c. Regarding the phosphate conversion treatment, the treatment liquid is Japan
Using Palbond PB-3020 manufactured by Parkerizing Co., Ltd.
Phosphate conversion treatment was carried out by the pickling method. And after each treatment
The unit area of the phosphate conversion coating on the test steel sheet
The number of precipitated phosphate crystals, crystal size and crystal shape.
In addition, phosphate chemical conversion treatment was comprehensively evaluated. In addition, this
The evaluation criteria at the time of are as follows. ◎: Excellent ○: Good △: Slightly poor ×: Poor
【００２３】得られた試験結果を表１および表２に合わ
せて示す。上掲の表１、表２に示す結果から明らかなよ
うに、本発明に従う鋼板（No.1〜18）は、耐孔あき性に
優れるとともに、その鋼板のリン酸塩化成処理性および
プレス加工性のいずれも良好な特性を示した。また、N
o. ９〜No. １８は、特に良好なリン酸塩化成処理性を
有していた。これに対し、比較例の場合は、これらの特
性のいずれか少なくとも１つが悪く、いずれも改善の必
要性があった。The obtained test results are shown in Tables 1 and 2. Table 1 above, as is clear from the results shown in Table 2, the steel plate according to the present invention (No.1~18) has excellent pitting corrosion resistance properties, the phosphate chemical conversion treatability of the steel sheet and the press Good workability was exhibited. Also, N
o. 9 to No. 18 had particularly good phosphate conversion treatment properties. On the other hand, in the case of the comparative example, at least one of these characteristics was bad, and there was a need for improvement in all of them.
【００２４】[0024]
【発明の効果】以上説明したように、この発明の鋼板
は、プレス加工性のほか、耐孔あき性に優れており、し
かもその鋼板はリン酸塩化成処理性にも優れている。従
って、自動車用の鋼板のように絞り加工が施され、かつ
塗装下地処理としてリン酸塩化成処理が施されて用いら
れる用途材として特に有利である。また、CuやCrを含有
していないため、リサイクルに有利となる。As described above, according to the present invention, the steel plate of the present invention
Is excellent not only in press workability but also in puncture resistance, and its steel sheet is also excellent in phosphate chemical conversion treatment. Therefore, it is particularly advantageous as an application material which is used after being subjected to drawing and subjected to a phosphate chemical conversion treatment as a coating base treatment like a steel plate for automobiles. Also , since it does not contain Cu or Cr, it is advantageous for recycling.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.7 識別記号 ＦＩ Ｃ２５Ｄ 5/26 Ｃ２５Ｄ 5/26 Ｃ (72)発明者 加藤 俊之 千葉県千葉市中央区川崎町１番地 川崎 製鉄株式会社 技術研究所内 (72)発明者 薄田 茂 東京都港区芝５丁目33番８号 三菱自動 車工業株式会社内 (72)発明者 佐野 哲 東京都港区芝５丁目33番８号 三菱自動 車工業株式会社内 (56)参考文献 特開 平４−254551（ＪＰ，Ａ) 特開 平５−65595（ＪＰ，Ａ) 特開 平５−132740（ＪＰ，Ａ) 特開 平６−41683（ＪＰ，Ａ) (58)調査した分野(Int.Cl.7，ＤＢ名) C22C 38/00 301 C22C 38/14 C22C 38/60 C23C 2/06 C25D 5/26 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 7 Identification code FI C25D 5/26 C25D 5/26 C (72) Inventor Toshiyuki Kato 1 Kawasaki-cho, Chuo-ku, Chiba City, Chiba Prefecture (72) Inventor Shigeru Usada 5-33-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation (72) Inventor Tetsu Sano 5-33-8 Shiba, Minato-ku, Tokyo Mitsubishi Motors Corporation (56) References JP-A-4-254551 (JP, A) JP-A-5-65595 (JP, A) JP-A-5-132740 (JP, A) JP-A-6-41683 (JP, A) (58) Field surveyed (Int. Cl. 7 , DB name) C22C 38/00 301 C22C 38/14 C22C 38/60 C23C 2/06 C25D 5/26
Claims (2)
以上を0.005 〜0.15wt％の範囲内で含有し、しかもＰと
Ｓとはその比Ｐ(wt%)/Ｓ(wt%) が５以上を満足するよう
に含有し、残部がFeおよび不可避的不純物よりなる耐孔
あき性に優れる深絞り用の鋼板。1. The composition contains C ≦ 0.005 wt%, Si ≦ 0.05 wt%, Mn ≦ 0.3 wt%, P: 0.01 to 0.05 wt%, S: 0.001 to 0.01 wt%, Al ≦ 0.05 wt%, and Ti , Nb and B are contained in the range of 0.005 to 0.15 wt% in a range of 0.005 to 0.15 wt%, and P and S have a ratio P (wt%) / S (wt%) of 5 or more. And a balance of Fe and unavoidable impurities.
以上を0.005 〜0.15wt％の範囲内で含有し、しかもＰと
Ｓとはその比Ｐ(wt%)/Ｓ(wt%) が５以上を満足するよう
に含有し、残部がFeおよび不可避的不純物よりなる耐孔
あき性に優れる深絞り用の鋼板。2. C ≦ 0.005 wt%, Si ≦ 0.05 wt%, Mn ≦ 0.3 wt%, P: 0.01 to 0.05 wt%, S: 0.001 to 0.01 wt%, Al ≦ 0.05 wt%, Sb: 0.001 to 0.06 wt.%, and one or more selected from Ti, Nb and B in the range of 0.005 to 0.15 wt%, and P and S have a ratio P (wt%) / A steel sheet for deep drawing that contains S (wt%) so as to satisfy 5 or more and the balance is Fe and unavoidable impurities and has excellent puncture resistance.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28378995A JP3229921B2 (en) | 1994-11-21 | 1995-10-31 | Steel sheet for deep drawing and surface-treated steel sheet with excellent perforation resistance |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP6-286491 | 1994-11-21 | ||
| JP28649194 | 1994-11-21 | ||
| JP28378995A JP3229921B2 (en) | 1994-11-21 | 1995-10-31 | Steel sheet for deep drawing and surface-treated steel sheet with excellent perforation resistance |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2000391107A Division JP3440079B2 (en) | 1994-11-21 | 2000-12-22 | Surface-treated steel sheet for deep drawing with excellent perforation resistance |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH08209301A JPH08209301A (en) | 1996-08-13 |
| JP3229921B2 true JP3229921B2 (en) | 2001-11-19 |
Family
ID=26555189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28378995A Expired - Fee Related JP3229921B2 (en) | 1994-11-21 | 1995-10-31 | Steel sheet for deep drawing and surface-treated steel sheet with excellent perforation resistance |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3229921B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2002194493A (en) * | 2000-12-21 | 2002-07-10 | Ferro Enamels Japan Ltd | Porcelain-enameling steel sheet and its manufacturing method, and enameled product and its manufacturing method |
| KR100711356B1 (en) * | 2005-08-25 | 2007-04-27 | 주식회사 포스코 | Steel Sheet for Galvanizing with Superior Formability and Method for Manufacturing the Steel Sheet |
-
1995
- 1995-10-31 JP JP28378995A patent/JP3229921B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH08209301A (en) | 1996-08-13 |
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