JPH07122091B2 - Method for producing hot-rolled steel sheet excellent in press formability and affinity with resin - Google Patents
Method for producing hot-rolled steel sheet excellent in press formability and affinity with resinInfo
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- JPH07122091B2 JPH07122091B2 JP4057579A JP5757992A JPH07122091B2 JP H07122091 B2 JPH07122091 B2 JP H07122091B2 JP 4057579 A JP4057579 A JP 4057579A JP 5757992 A JP5757992 A JP 5757992A JP H07122091 B2 JPH07122091 B2 JP H07122091B2
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- hot
- surface roughness
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- rolled
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Description
【０００１】[0001]
【産業上の利用分野】本発明は熱延鋼板の製造に関し、
より詳細には、自動車部材等に使用される鋼板に適し、
プレス成形性と樹脂との親和性に優れた熱延高張力鋼板
とその製造方法に関する。The present invention relates to the production of hot rolled steel sheet,
More specifically, it is suitable for steel plates used for automobile parts,
The present invention relates to a hot-rolled high-strength steel sheet excellent in press formability and affinity with a resin, and a manufacturing method thereof.
【０００２】[0002]
【従来の技術及び発明が解決しようとする課題】近年、
自動車用部材の形状の複雑化は、ボディ外板等の冷延鋼
板使用部材に止まらず、シャーシ等、熱延鋼板を使用す
る部材にまで及んでいる。また、自動車の燃費向上のた
めの車体重量軽減は、地球的課題である。このため、使
用される鋼板の強度レベルを増加させて、使用板厚を減
少させる要求が強くなっている。2. Description of the Related Art In recent years,
The complexity of the shape of the members for automobiles is not limited to members using cold-rolled steel plates such as body outer plates, but extends to members such as chassis that use hot-rolled steel plates. In addition, reducing the vehicle body weight to improve the fuel efficiency of automobiles is a global issue. For this reason, there is an increasing demand for increasing the strength level of the steel plate used and reducing the plate thickness used.
【０００３】しかし、このような熱延高張力鋼板の成形
性は、軟鋼板のそれに比して低下するため、プレス成形
すると、プレス金型と鋼板との間で焼付き(ゴーリング)
現象が発生し易くなる。その結果、プレス成形時に鋼板
に割れが発生し、部品の生産性を阻害するという欠点が
あった。また、プレス金型の焼付部の手入頻度が高くな
り、生産性を阻害するという問題もあった。However, since the formability of such a hot-rolled high-tensile steel sheet is lower than that of a mild steel sheet, when press-formed, seizure (goring) occurs between the press die and the steel sheet.
The phenomenon is likely to occur. As a result, the steel sheet is cracked during press forming, which impairs the productivity of parts. In addition, there is a problem that the frequency of maintenance of the baking portion of the press die becomes high and the productivity is impaired.
【０００４】また、従来の熱延高張力鋼板は、多層のサ
ンドイッチ構造からなる振動吸収複合鋼板に使用した場
合、粘弾性均質との親和力が小さく、その性能が劣ると
い欠点があった。Further, the conventional hot-rolled high-strength steel sheet has a drawback that when used in a vibration-absorbing composite steel sheet having a multilayer sandwich structure, it has a low affinity with viscoelastic homogeneity and its performance is inferior.
【０００５】本発明は、上記従来技術の欠点を解消し
て、プレス成形性に優れると共に粘弾性均質との親和性
に優れる熱延高張力鋼板とその製造方法を提供すること
を目的とするものである。SUMMARY OF THE INVENTION It is an object of the present invention to provide a hot-rolled high-strength steel sheet excellent in press formability and affinity for viscoelastic homogeneity, and a method for producing the same, by eliminating the above-mentioned drawbacks of the prior art. Is.
【０００６】[0006]
【課題を解決しようとする手段】前述のとおり、自動車
の軽量化のため熱延高張力鋼板が要求されているが、そ
のプレス成形性を向上させ、プレス金型との焼付を改善
する必要がある。このためには、熱延高張力鋼板の成形
性そのものを改善させる手段もあるが、そのような手段
では、所定の高張力を有する熱延高張力鋼板の降伏点を
下げ、伸びを増大させることは、極めて困難である。As described above, hot-rolled high-tensile steel sheets are required to reduce the weight of automobiles, but it is necessary to improve their press formability and to improve seizure with a press die. is there. For this purpose, there is also a means for improving the formability of the hot-rolled high-tensile steel sheet itself, but with such means, the yield point of the hot-rolled high-tensile steel sheet having a predetermined high tension is lowered to increase the elongation. Is extremely difficult.
【０００７】このような状況のもとで、本発明者は、こ
の問題を解決するために鋭意研究を重ねた結果、プレス
成形時の熱延鋼板の表面粗さに着目するに至った。すな
わち、従来の熱延鋼板の酸洗後の表面粗さは、図１に示
す如くＲa０.７〜１.５μmと小さい。しかし、表面粗さ
が大きいと、金型と鋼板の間の潤滑油の保持量が大きく
なり、プレス金型の焼付の発生を防止し得ることを知見
した。また、多層のサンドイッチ構造からなる振動吸収
複合鋼板に使用した場合、表面粗さが大きいと、粘弾性
均質との親和力が大きくなる。これらの知見に基づいて
更に詳細に実験研究を重ねて、ここに本発明を完成した
ものである。Under these circumstances, the present inventor has conducted intensive studies to solve this problem, and as a result, has focused on the surface roughness of the hot-rolled steel sheet during press forming. That is, the surface roughness of the conventional hot-rolled steel sheet after pickling is as small as Ra 0.7 to 1.5 μm as shown in FIG. However, it has been found that when the surface roughness is large, the amount of lubricating oil held between the die and the steel sheet is large, and the occurrence of seizure in the press die can be prevented. Further, when used in a vibration-absorbing composite steel sheet having a multilayer sandwich structure, if the surface roughness is large, the affinity with viscoelastic homogeneity becomes large. Based on these findings, more detailed experimental studies have been carried out to complete the present invention.
【０００８】すなわち、本発明は、Ｃ:０.００１〜０.
３０％、Ｓi:０.３０〜２.５０％、Ｍn:０.２０〜２.５
０％を含有する鋼であって、熱間圧延後に行う酸洗後の
表面粗度がＲa１.７〜３.０μmであることを特徴とする
抗張力４９０Ｎ／mm2以上でプレス成形性及び樹脂との
親和性に優れた熱延鋼板を要旨とするものである。That is, according to the present invention, C: 0.001 to 0.
30%, Si: 0.30 to 2.50%, Mn: 0.20 to 2.5
A steel containing 0%, characterized in that the surface roughness after pickling carried out after hot rolling is Ra 1.7 to 3.0 μm, with a tensile strength of 490 N / mm 2 or more and a press formability and resin. The subject is a hot-rolled steel sheet having excellent affinity.
【０００９】また、その製造方法は、 C:0.001〜0.30
％、 Si:0.30〜2.50％、 Mn:0.20〜2.50％を含有する鋼
につき、該スラブを1100〜1270℃に加熱してスラブ表面
にファイアライトを生成させて熱間圧延を行い、次いで
酸洗して前記ファイアライトを溶解し、酸洗後の表面粗
度 Ra1.7〜3.0 μm を得ることを特徴とする抗張力490N
/mm2以上でプレス成形性及び樹脂との親和性に優れた熱
延鋼板の製造方法を要旨とするものである。The manufacturing method is as follows: C: 0.001 to 0.30
%, Si: 0.30 to 2.50%, Mn: 0.20 to 2.50%, the slab surface is heated to 1100 to 1270 ° C.
To produce a fire light, hot-rolled, then pickled to dissolve the fire light, to obtain a surface roughness Ra1.7 ~ 3.0 μm after pickling tensile strength 490N
The gist is a method for producing a hot-rolled steel sheet having a press formability of not less than / mm 2 and excellent affinity with a resin.
【００１０】以下に本発明を更に詳細に説明する。The present invention will be described in more detail below.
【００１１】[0011]
【００１２】Ｓiを０.３０％以上含む鋼のスラブを熱延
加熱炉で１１００〜１２７０℃に加熱すると、ファイア
ライト(２ＦeＯ・ＳiＯ2)が生成する。このスケールは、
加熱中にスラブの地金に食い込み、アンカー効果と呼ば
れる如く、スラブから除去することは困難である。この
ため、しばしば、赤スケールと呼ばれる表面不良を発生
させる。したがって、従来はこのファイアライトを除去
する方法が問題であつた。When a steel slab containing 0.30% or more of Si is heated to 1100 to 1270 ° C. in a hot rolling furnace, firelite (2FeO.SiO 2 ) is produced. This scale is
It bites into the slab's metal during heating and is difficult to remove from the slab, as is called the anchor effect. Therefore, a surface defect called red scale is often generated. Therefore, conventionally, the method of removing the firelight has been a problem.
【００１３】一方、本発明では、Siを0.30％以上含む鋼
のスラブの加熱温度を1100〜1270℃としてファイアライ
トを生成させ、かつ、デスケラーを弱噴射する等によ
り、板面全面にファイアライトを残存させ、これを酸洗
して酸洗後の熱延鋼板の表面粗さを図２に示す如く Ra
1.7〜3.0 μm にするのである。On the other hand, according to the present invention, a firelight is generated at a heating temperature of a steel slab containing 0.30% or more of Si of 1100 to 1270 ° C., and a descaler is weakly jetted to form a firelight on the entire plate surface. Let it remain and pickle it
As shown in Fig. 2, the surface roughness of the hot rolled steel sheet after pickling was
It should be 1.7 to 3.0 μm.
【００１４】まず、本発明における鋼の化学成分の限定
理由について説明する。First, the reasons for limiting the chemical composition of steel in the present invention will be explained.
【００１５】Ｃ：Ｃは高張力鋼板を製造するために必要
な成分であり、そのためには最低０.００１％が必要で
ある。しかし、０.３０％を超えると熱延高張力鋼板の
延性が極端に低下するため好ましくない。よって、Ｃ量
は０.００１〜０.３０％の範囲とする。C: C is a component necessary for producing a high-strength steel sheet, and for this purpose, a minimum of 0.001% is required. However, if it exceeds 0.30%, the ductility of the hot-rolled high-tensile steel sheet is extremely lowered, which is not preferable. Therefore, the amount of C is set to the range of 0.001 to 0.30%.
【００１６】Ｓi：Ｓiはスラブ加熱中に適度なファイア
ライトを発生させるために必要な成分であり、そのため
には、Ｓi量は０.３０％以上にする必要がある。しか
し、高張力鋼板を製造するためには２.５％までで充分
である。よって、Ｓi量は０.３０〜２.５０％の範囲と
する。Si: Si is a component necessary for generating an appropriate fire light during heating of the slab, and for this purpose, the amount of Si must be 0.30% or more. However, up to 2.5% is sufficient to produce high strength steel sheets. Therefore, the amount of Si is set in the range of 0.30 to 2.50%.
【００１７】Ｍn：Ｍnは高張力鋼板を製造するために最
低０.２０％が必要である。しかし、２.５０％を超える
と熱延高張力鋼板の延性が極端に低下するため好ましく
ない。よって、Ｍn量は０.２０〜２.５０％の範囲とす
る。Mn: Mn is required to be at least 0.20% in order to manufacture a high strength steel plate. However, if it exceeds 2.50%, the ductility of the hot-rolled high-tensile steel sheet is extremely lowered, which is not preferable. Therefore, the amount of Mn is set in the range of 0.20 to 2.50%.
【００１８】なお、本発明においては、上記の各成分を
所定量含む限り、他の合金元素、例えば、Ｔi、Ｎb、
Ｖ、Ｃr等を必要に応じて添加することができる。In the present invention, other alloying elements such as Ti, Nb,
V, Cr and the like can be added if necessary.
【００１９】次に本発明の製造条件について説明する。Next, the manufacturing conditions of the present invention will be described.
【００２０】スラブ加熱温度：上記化学成分の鋼は常法
により溶製、鋳造しスラブを得る。スラブを加熱する場
合、１１００℃未満ではファイアライトの発生が抑制さ
れる。また、１２７０℃を超えると生成したファイアラ
イトが半溶融状態となっており、熱間圧延前の水圧デス
ケラーで容易に除去されてしまう。このため、熱間圧延
後、酸洗した時の熱延鋼板の表面粗さは、図１に示す如
く、通常の熱延鋼板のものと同様にＲa０.７〜１.５μm
と小さい。一方、スラブ加熱温度を１１００〜１２７０
℃とした場合には、生成したファイアライトは容易に除
去できず、熱間圧延後、酸洗した時の熱延鋼板の表面粗
さはＲa１.７〜３.０μmが得られる。よって、スラブ加
熱温度は１１００〜１２７０℃の範囲とする。Slab heating temperature: Steel having the above chemical composition is melted and cast by a conventional method to obtain a slab. When heating the slab, generation of firelight is suppressed at temperatures lower than 1100 ° C. Further, when the temperature exceeds 1270 ° C., the generated firelite is in a semi-molten state and is easily removed by the hydraulic descaler before hot rolling. Therefore, the surface roughness of the hot-rolled steel sheet after pickling after hot rolling is Ra 0.7 to 1.5 μm as shown in FIG.
And small. On the other hand, the slab heating temperature is 1100 to 1270.
When the temperature is set to ° C, the generated firelite cannot be easily removed, and the surface roughness of the hot-rolled steel sheet after hot rolling and pickling is Ra 1.7 to 3.0 µm. Therefore, the slab heating temperature is set in the range of 1100 to 1270 ° C.
【００２１】スラブを上記温度に加熱した後、熱間圧延
し、酸洗を行うが、熱間圧延及び酸洗条件は特に制限さ
れるものではない。After heating the slab to the above temperature, it is hot-rolled and pickled, but the hot-rolling and pickling conditions are not particularly limited.
【００２２】但し、酸洗後の熱延鋼板の表面粗さはＲa
１.７〜３.０μmの範囲である必要がある。表面粗さが
Ｒa１.７μmより小さいと、熱延鋼板とダイスの間で焼
付きが発生し易く、プレス成形性向上の効果が小さい。
また、サンドイッチ型の制振鋼板に使用した場合に粘弾
性物質との親和力が小さく、制振性能が劣る。一方、表
面粗さがＲa３.０μmより大きくなると、プレス成形し
た製品を塗装した際に、鋼板の表面粗度の凹凸が浮き出
て、商品価値を損うので好ましくない。なお、平均表面
粗さではＲa１.９〜２.６μmの範囲が好ましい。However, the surface roughness of the hot rolled steel sheet after pickling is Ra
It must be in the range of 1.7 to 3.0 μm. If the surface roughness is less than Ra 1.7 μm, seizure easily occurs between the hot-rolled steel sheet and the die, and the effect of improving press formability is small.
Further, when it is used for a sandwich type vibration damping steel plate, it has a low affinity with a viscoelastic substance, resulting in poor vibration damping performance. On the other hand, if the surface roughness is more than Ra 3.0 μm, the unevenness of the surface roughness of the steel sheet is exposed when the press-molded product is coated, which is unfavorable for the commercial value. The average surface roughness Ra is preferably in the range of 1.9 to 2.6 μm.
【００２３】[0023]
【００２４】本発明により得られる熱延鋼板は、４９０
Ｎ／mm2以上の高抗張力の高張力鋼板である必要があ
る。これより強度が低いと、自動車用部材等に使用した
場合に板厚減少による重量軽減効果が得られない。The hot-rolled steel sheet obtained by the present invention is 490
It must be a high-strength steel plate with a high tensile strength of N / mm 2 or more. If the strength is lower than this, the effect of reducing the weight due to the reduction of the plate thickness cannot be obtained when it is used as a member for automobiles.
【００２５】以下に本発明の実施例を示す。Examples of the present invention will be shown below.
【００２６】[0026]
【実施例】供試鋼として、[Example] As a sample steel,
【表１】 に示す化学成分の鋼を常法により溶製、鋳造し、スラブ
とした。次いで[Table 1] A steel having the chemical composition shown in 1 was melted and cast by a conventional method to form a slab. Then
【表２】 に示す条件で、スラブを加熱した後、熱間圧延、酸洗を
行った。得られた熱延鋼板(板厚２.３mm)について、表
面粗さを測定すると共に、プレス成形性並びに制振性能
を調べた。それらの結果を[Table 2] After heating the slab under the conditions shown in (1), hot rolling and pickling were performed. The surface roughness of the obtained hot-rolled steel sheet (thickness: 2.3 mm) was measured, and the press formability and damping performance were examined. Those results
【表３】に示す。表面粗さを図１〜図４に示す。It shows in [Table 3]. The surface roughness is shown in FIGS.
【００２７】プレス成形試験は、図５に示す要領にてプ
レス成形して図６に示す形状の部品を作製し、焼付きま
でのプレス回数にて評価した。プレス成形試験では防錆
油としてメタルガード８１６を２０００mg／m2塗油し
た。In the press molding test, the parts having the shape shown in FIG. 6 were manufactured by press molding according to the procedure shown in FIG. 5, and evaluated by the number of presses until seizure. In the press molding test, 2000 mg / m 2 of metal guard 816 was applied as rust preventive oil.
【００２８】制振性能試験では、２枚の熱延鋼板(板厚
１.２mm)の間に粘弾性物質としてポリエステル系樹脂を
挾み込んで圧着し、Ｔ剥離試験及び剪断引張試験に供し
た。In the vibration-damping performance test, a polyester resin as a viscoelastic substance was sandwiched between two hot-rolled steel sheets (sheet thickness: 1.2 mm) and pressure-bonded, and subjected to a T peel test and a shear tensile test. .
【００２９】表３及び図１、図３に示すように、従来鋼
では、平均表面粗さがＲa１.１μmと小さいため、潤滑
剤の保持量やプレス成形時の潤滑剤の持ち込み量が少な
いため、熱延鋼板とダイスの間で焼付が発生し易く、焼
付きまでのプレス回数が少ない。As shown in Table 3 and FIGS. 1 and 3, since the conventional steel has a small average surface roughness Ra of 1.1 μm, the amount of lubricant retained and the amount of lubricant carried in during press forming are small. The seizure easily occurs between the hot-rolled steel sheet and the die, and the number of presses before the seizure is small.
【００３０】これに対し、本発明鋼では、表３及び図
２、図４に示すように平均表面粗さがＲa２.３μmと大
きいため、潤滑剤の保持量やプレス成形時の潤滑剤の持
ち込み量が大きくなり、焼付きまでのプレス回数が大き
く、焼付に対して大幅に改善されている。On the other hand, in the steel of the present invention, the average surface roughness Ra is as large as 2.3 μm as shown in Table 3 and FIGS. 2 and 4, so that the amount of lubricant retained and the amount of lubricant carried in during press forming are large. The amount is large, the number of presses until seizure is large, and it is greatly improved against seizure.
【００３１】また、制振性能については、Regarding the vibration damping performance,
【表４】に示すように、本発明鋼は前述の如く表面粗さ
が粗く、凹凸が大きいため、サンドイツチ型の制振鋼板
に使用した場合に粘弾性物質との親和力が大きくなり、
剥離強度、剪断引張強度が高く、制振鋼板の性能が大幅
に向上している。一方、従来鋼は、表面粗さが小さいた
め、剥離強度、剪断引張強度が低く、制振性能が劣って
いる。As shown in Table 4, the steel of the present invention has a large surface roughness and large irregularities as described above, and therefore has a large affinity with a viscoelastic substance when used in a Sangertian type vibration damping steel plate.
Peel strength and shear tensile strength are high, and the performance of the vibration-damping steel plate is greatly improved. On the other hand, the conventional steel has a low surface roughness, and thus has a low peel strength and a low shear tensile strength, and is inferior in vibration damping performance.
【００３２】[0032]
【発明の効果】以上詳述したように、本発明によれば、
熱延鋼板の表面粗さが粗く、凹凸が大きく、凹凸の密度
が高いため、プレス時の潤滑油保持力が大きくなり、プ
レス成形等において金型との焼付が改善されると共に、
サンドイッチ型の制振鋼板に使用した場合、粘弾性物質
（樹脂）との親和性が大きくなり、制振性能が大幅に向
上する。As described in detail above, according to the present invention,
Surface roughness of the hot rolled steel sheet is rough, uneven rather large, the density of irregularities
Since the holding power is high, the lubricating oil holding power at the time of pressing becomes large , and the seizure with the mold is improved in press molding and the like.
Viscoelastic substance when used for sandwich type damping steel plate
The compatibility with (resin) is increased, and the vibration damping performance is greatly improved.
【図１】熱延鋼板の酸洗後の表面粗さ分布を示す図で、
従来鋼の場合である。FIG. 1 is a diagram showing a surface roughness distribution of a hot rolled steel sheet after pickling,
This is the case with conventional steel.
【図２】熱延鋼板の酸洗後の表面粗さ分布を示す図で、
本発明鋼の場合である。FIG. 2 is a diagram showing a surface roughness distribution of a hot rolled steel sheet after pickling,
This is the case for the steel of the present invention.
【図３】熱延鋼板の酸洗後の表面粗さを示す図で、従来
鋼の場合である。FIG. 3 is a diagram showing the surface roughness of a hot rolled steel sheet after pickling, which is the case of conventional steel.
【図４】熱延鋼板の酸洗後の表面粗さを示す図で、本発
明鋼の場合である。FIG. 4 is a diagram showing the surface roughness of a hot rolled steel sheet after pickling, which is the case of the steel of the present invention.
【図５】プレス成形試験の要領並びにプレス成形時の焼
付現象の発生状況を示す図である。FIG. 5 is a diagram showing the procedure of a press molding test and the occurrence of a seizure phenomenon during press molding.
【図６】プレス成形試験で得られたプレス成形部品並び
に焼付現象が発生する部位を説明する図である。FIG. 6 is a diagram illustrating a press-molded part obtained in a press-molding test and a site where a seizure phenomenon occurs.
【表３】 [Table 3]
【表３】 [Table 3]
───────────────────────────────────────────────────── 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 38/04 ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 6 Identification code Internal reference number FI Technical indication C22C 38/04
Claims (1)
〜2.50％、 Mn:0.20〜2.50％を含有する鋼につき、該ス
ラブを1100〜1270℃に加熱してスラブ表面にファイアラ
イトを生成させて熱間圧延を行い、次いで酸洗して前記
ファイアライトを溶解し、酸洗後の表面粗度 Ra1.7〜3.
0 μm を得ることを特徴とする抗張力490N/mm 2 以上でプ
レス成形性及び樹脂との親和性に優れた熱延鋼板の製造
方法。 1. By weight%, C: 0.001 to 0.30%, Si: 0.30
~ 2.50%, Mn: 0.20-2.50% for steel containing
The slab surface is fired by heating the slab to 1100-1270 ℃.
And then hot-rolled, followed by pickling
Surface roughness Ra1.7 ~ 3 after dissolving the fire light and pickling.
A tensile strength of 490 N / mm 2 or more
Manufacturing of hot-rolled steel sheet with excellent moldability and compatibility with resin
Method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4057579A JPH07122091B2 (en) | 1992-02-10 | 1992-02-10 | Method for producing hot-rolled steel sheet excellent in press formability and affinity with resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4057579A JPH07122091B2 (en) | 1992-02-10 | 1992-02-10 | Method for producing hot-rolled steel sheet excellent in press formability and affinity with resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH05222485A JPH05222485A (en) | 1993-08-31 |
| JPH07122091B2 true JPH07122091B2 (en) | 1995-12-25 |
Family
ID=13059766
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4057579A Expired - Fee Related JPH07122091B2 (en) | 1992-02-10 | 1992-02-10 | Method for producing hot-rolled steel sheet excellent in press formability and affinity with resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH07122091B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663078A (en) * | 2020-06-09 | 2020-09-15 | 首钢集团有限公司 | Hot-rolled pickled plate and method for eliminating pit defect of hot-rolled pickled plate |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS58100622A (en) * | 1981-12-08 | 1983-06-15 | Nippon Steel Corp | Production of silicon-manganese high strength steel plate having excellent suitability to chemical conversion |
| JPS62196336A (en) * | 1986-02-20 | 1987-08-29 | Nippon Steel Corp | Manufacture of super 100kgf/mm2 class hot-rolled steel plate with superior workability |
| JPH07109022B2 (en) * | 1986-03-31 | 1995-11-22 | 川崎製鉄株式会社 | Cold rolled metal sheet with excellent galling resistance and sharpness after painting |
| JPH01294875A (en) * | 1988-05-20 | 1989-11-28 | Hitake Seiko Kk | Surface treatment for resin film and the like |
| JPH02163345A (en) * | 1988-12-15 | 1990-06-22 | Kawasaki Steel Corp | Cold rolled steel sheet for deep drawing excellent in die galling resistance |
| JPH03191083A (en) * | 1989-12-20 | 1991-08-21 | Mitsubishi Electric Corp | Method for black-plating roughened surface |
-
1992
- 1992-02-10 JP JP4057579A patent/JPH07122091B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111663078A (en) * | 2020-06-09 | 2020-09-15 | 首钢集团有限公司 | Hot-rolled pickled plate and method for eliminating pit defect of hot-rolled pickled plate |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH05222485A (en) | 1993-08-31 |
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