JPH0653911B2 - High-strength hot-rolled steel sheet suitable for upset butt welding - Google Patents
High-strength hot-rolled steel sheet suitable for upset butt weldingInfo
- Publication number
- JPH0653911B2 JPH0653911B2 JP16116889A JP16116889A JPH0653911B2 JP H0653911 B2 JPH0653911 B2 JP H0653911B2 JP 16116889 A JP16116889 A JP 16116889A JP 16116889 A JP16116889 A JP 16116889A JP H0653911 B2 JPH0653911 B2 JP H0653911B2
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- JP
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- Prior art keywords
- less
- butt welding
- steel sheet
- upset butt
- rolled steel
- 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.)
- Expired - Lifetime
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Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、自動車のホイールリム用鋼板等に適する、フ
ラッシュバット溶接および直流バット溶接等のアップセ
ットバット溶接性の良好な引張強さ50kgf/mm２以上を有
する高張力熱延鋼板に関するものである。DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is suitable for steel plates for wheel rims of automobiles and the like, and has a good tensile strength of 50 kgf / upset butt weldability such as flash butt welding and DC bat welding. The present invention relates to a high-strength hot-rolled steel sheet having a mm 2 or more.
（従来の技術） 近年、自動車の燃費向上を目的として車体の軽量化が積
極的に推進されるようになり、これに伴い車体部品につ
いて素材鋼板を高張力化し、その分ゲージダウンを図る
方向に検討が進められている。(Prior art) In recent years, the weight reduction of the vehicle body has been actively promoted for the purpose of improving the fuel efficiency of automobiles, and along with this, the tensile strength of the material steel sheet for the vehicle body parts has been increased, and the gauge down has been made correspondingly. Consideration is in progress.
ホイールリムもかかる部品の一つであるが、これは一般
に第１図(イ) 、(ロ) に示すようにアップセットバット溶
接によって鋼板10を同(イ) に示すリング状に接合した後
成形加工し、次いで、冷間加工により同(ロ) の形状のホ
ィールリム20となす手順にて製造されるが、この部品の
ゲージダウンを実現するにはアップセットバット溶接性
に優れしかも高張力を備える鋼板が必要になる。The wheel rim is also one of such parts, but it is generally formed by joining the steel plates 10 to the ring shape shown in (a) by upset butt welding as shown in Fig. 1 (a) and (b). It is processed and then cold-worked to make the wheel rim 20 of the same shape (b), but in order to realize gauge down of this part, it has excellent upset butt weldability and high tension. Steel plate is required.
ここに、アップセットバット溶接性はいわゆる溶接性の
他に溶接部の冷間加工性が優れていることが要求され
る。In addition to the so-called weldability, the upset butt weldability is required to have excellent cold workability in the welded portion.
したがって、特にホイールリム用としては次のような特
性が要望される。Therefore, the following characteristics are required especially for wheel rims.
(1) 高強度、好ましくは50kgf/mm２以上 (2) アップセットバット溶接性 (3) 熱延まゝでの冷間加工性 しかしながらこれらの諸特性を同時に満足させることは
きわめて困難である。例えば、強度確保のため、一般の
高張力鋼板に見られるように強化元素としてＣ、Si、Mn
を添加すると熱延まゝの冷間加工性が阻害されるばかり
でなく、アップセットバット溶接時に著しくHAZ 部を硬
化させその部分の冷間加工性も大きく阻害される。また
従来から強化元素としてよく用いられるNb、Ｖの添加の
みでは母材強度の飽和が早く、引張強さ50kgf/mm２以上
を確保するためにはその多量の添加を必要とし、結果と
してHAZ 部の硬化が大きくなり加工性が大きく阻害され
る。(1) High strength, preferably 50 kgf / mm 2 or more (2) Upset butt weldability (3) Cold workability in hot rolling "However, it is extremely difficult to satisfy these characteristics at the same time. For example, in order to secure strength, C, Si, Mn are used as strengthening elements as seen in general high-strength steel sheets.
Addition of not only hinders the cold workability of hot rolled steel, but also significantly hardens the HAZ part during upset butt welding and significantly hinders the cold workability of that part. In addition, the addition of Nb and V, which have been often used as a strengthening element, causes the saturation of the strength of the base metal quickly and requires a large amount of addition to secure a tensile strength of 50 kgf / mm 2 or more. The hardening of the steel becomes large and the workability is greatly impaired.
特開昭50-24116 号公報および特開昭50-133920号公報に
開示されているTi添加高張力熱延鋼板は、Tiの有効性を
確保するためsol.Alを0.005 〜0.15％含有している。Ｎ
についてはＳと同様に可及的に少ないのが良いとして50
〜60ppm 以下が好ましいとしている。しかも、これらは
いずれも板厚 4.5mm以上の厚鋼板を対称としており、特
に低温靭性の改善を意図している。The Ti-added high-strength hot-rolled steel sheets disclosed in JP-A-50-24116 and JP-A-50-133920 contain 0.005-0.15% of sol.Al in order to secure the effectiveness of Ti. There is. N
As for S, it is good that it is as small as possible and 50
It is said that the content is preferably -60 ppm or less. Moreover, all of these are symmetrical with thick steel plates with a thickness of 4.5 mm or more, and are particularly intended to improve low temperature toughness.
一方、ホィールリム用としては特開昭58-199845号公報
にＳ≦0.005 ％としたTi含有高張力熱延鋼板が開示され
ている。しかしながら、この公報開示の鋼材組成ではso
l.AlおよびＮについては何ら言及することがない。冷間
成形時にフラッシュバット溶接部が破断、ミクロ割れあ
るいはネッキングなどの形状不良が起こるのを防止する
ために、炭素当量を調整することで防止しようとしてい
る。On the other hand, for wheel rims, JP-A-58-199845 discloses a Ti-containing high-strength hot-rolled steel sheet having S ≦ 0.005%. However, in the steel material composition disclosed in this publication,
No mention is made of l.Al and N. In order to prevent shape defects such as fracture, micro-cracking, or necking of the flash butt weld during cold forming, the carbon equivalent is adjusted to prevent it.
また、特開昭61-264159号公報および特開昭61-264160号
公報にあっては前述の特開昭58-199845号と同様の目的
をもって炭素当量を規制することを開示しているが、こ
の例では脱酸のためAl添加量を0.01〜0.05％とするが、
Ｎについては何ら言及することがない。Further, JP-A-61-264159 and JP-A-61-264160 disclose that the carbon equivalent is regulated for the same purpose as in JP-A-58-199845 described above. In this example, the amount of Al added is 0.01 to 0.05% for deoxidation,
There is no mention of N.
（課題を解決するための手段） 上記に鑑み、本発明者らは、良好なアップセットバット
溶接性と高張力性が得られる鋼組成について鋭意実験の
結果、強化元素をTiとし、一方Tiの有効化を図るために
鋼中のＮ、Alを極く微量に抑えることにより上述の所望
の特性をいずれも備えた熱延鋼板が得られることを知っ
た。(Means for Solving the Problems) In view of the above, the inventors of the present invention have conducted an earnest experiment on a steel composition with which good upset butt weldability and high tensile strength are obtained. It has been found that a hot-rolled steel sheet having any of the above-described desired characteristics can be obtained by suppressing N and Al in steel to an extremely small amount for the purpose of effectiveness.
これは、添加に伴う強度の飽和が起こりにくいTiにより
引張強さ50kgf/mm２以上を確保するとともに母材の強度
には働かずHAZ 部のみを強化するTiN の析出を極低Ｎと
することで抑え、さらにアップセットバット溶接時のTi
酸化物による清浄度の悪化を極低Alにすることで抑えた
ものである。This is because the tensile strength of 50 kgf / mm 2 or more is secured by Ti, which does not easily cause strength saturation with addition, and the precipitation of TiN, which does not affect the strength of the base metal and strengthens only the HAZ part, is extremely low N. And Ti during upset butt welding
Deterioration of cleanliness due to oxides is suppressed by setting extremely low Al.
本発明は、このような知見を基になされたものであっ
て、その要旨は、重量％で C : 0.03〜0.20％、Si: 1.0 ％以下、 Mn: 2.0 ％以下、P : 0.05％以下、 S : 0.05％以下、sol.Al: 0.005％未満、 N : 20ppm 以下、 Ti: 0.01〜0.10％、 残部は鉄および不可避不純物 から成る、引張強さ50kgf/mm２以上を有するアップセッ
トバット溶接に適した高張力熱延鋼板である。The present invention is based on such findings, the gist thereof is C: 0.03 to 0.20% by weight, Si: 1.0% or less, Mn: 2.0% or less, P: 0.05% or less, S: 0.05% or less, sol.Al: less than 0.005%, N: 20ppm or less, Ti: 0.01 to 0.10%, the balance consisting of iron and unavoidable impurities, for upset butt welding with a tensile strength of 50 kgf / mm 2 or more. It is a suitable high-strength hot-rolled steel sheet.
前記鋼組成には、さらに、Nb: 0.05〜0.10％およびＶ:
0.005〜0.20％の少なくとも１種以上から成る第１群、 ならびにCa: 0.002 〜0.01％、Zr:0.01 〜0.10％および
希土類元素:0.002〜0.10％の少なくとも１種以上からな
る第２群のうち少なくとも１群以上を含んでもよい。The steel composition further includes Nb: 0.05 to 0.10% and V:
At least one of the first group consisting of at least one of 0.005 to 0.20%, and the second group consisting of at least one of Ca: 0.002 to 0.01%, Zr: 0.01 to 0.10% and rare earth elements: 0.002 to 0.10% It may include one or more groups.
（作用） 次に、本発明において鋼組成を上述のように限定した理
由および作用について詳述する。(Action) Next, the reason and action for limiting the steel composition as described above in the present invention will be described in detail.
Ｃ: Ｃは鋼板の強度を向上させる作用があるが、その含
有量が0.03％未満では所望の高強度を有することができ
ず、また0.20％を越えて含有させると溶接性を劣化させ
る。従ってＣの含有量を0.03〜0.20％と定めた。C: C has the effect of improving the strength of the steel sheet, but if its content is less than 0.03% it cannot have the desired high strength, and if it exceeds 0.20% it deteriorates the weldability. Therefore, the content of C is set to 0.03 to 0.20%.
Si、Mn: SiおよびMnは固溶強化を通して強度と延性を向
上させる好ましい元素である。しかし、必要以上に添加
するとアップセットバット溶接性が劣化するのでその含
有量をSi:1.0％以下、Mn: 2.0 ％以下と定めた。Si, Mn: Si and Mn are preferred elements that improve strength and ductility through solid solution strengthening. However, if added more than necessary, the upset butt weldability deteriorates, so the contents were determined to be Si: 1.0% or less and Mn: 2.0% or less.
Ｐ: Ｐは溶接性に悪影響を及ぼす不純物元素であり所望
のアップセットバット溶接性を確保するためには含有量
を0.05％以下に抑える必要がある。P: P is an impurity element that adversely affects the weldability, and its content must be suppressed to 0.05% or less in order to secure the desired upset butt weldability.
Ｓ: ＳはMnS 系介在物を形成して熱間加工性を低下させ
る不純物元素である。従ってＳ含有量を0.05％以下とす
る必要がある。S: S is an impurity element that forms MnS-based inclusions and deteriorates hot workability. Therefore, the S content needs to be 0.05% or less.
Ti: 第２図は、Ｃ 0.005％、Si 0.1％、Mn 1.1％、Ｐ
0.012％、Ｓ 0.003％、sol.Al 0.004％、Ｎ 0.0005 ％
を含む鋼を基本成分としてTi、Nb、Ｖを添加した場合の
引張強さの変化を示す図であるが、第２図から明らかな
如く、TiはNb、Ｖと比べ鋼を著しく強化するが、その含
有量が0.005 ％未満では所望の効果が得られず、また0.
10％を越えて含有させてもその効果が飽和したり、逆に
その作用効果が低下したりするようになることからTiの
含有量を0.01〜0.10％と定めた。好ましくは0.01〜0.05
％である。Ti: Fig. 2 shows C 0.005%, Si 0.1%, Mn 1.1%, P
0.012%, S 0.003%, sol.Al 0.004%, N 0.0005%
FIG. 2 is a diagram showing changes in tensile strength when Ti, Nb, and V are added to a steel containing Ti as a basic component. As is clear from FIG. 2, Ti significantly strengthens steel as compared with Nb and V. , If the content is less than 0.005%, the desired effect cannot be obtained, and
Even if the content exceeds 10%, the effect will be saturated, and conversely the action and effect will decrease, so the Ti content was set to 0.01 to 0.10%. Preferably 0.01-0.05
%.
Ｎ: ＮはTiと結合してTiN として析出しTiの鋼の強化作
用を著しく阻害するとともにアップセットバット溶接時
にこのTiN が固溶しTiの強化作用によってNAZ 部が著し
く硬化するため加工性が大きく低下する。従ってＮの含
有量を20ppm 以下、好ましくは10ppm 以下と定めた。従
来にあってもTiの有効化を図るためにＮ含有量を少なく
するとの考えはあったが、その場合も50ppm 程度で効果
が飽和すると考えられていた。第３図はＣ 0.09％、Si
0.15 ％、Mn 1.5％、Ｐ 0.015％、Ｓ 0.002％、sol.Al
0.004％、Ti 0.05 ％を基本成分とする2.5 mm厚の熱延
鋼板からアップセットバット溶接後、80個のホイールリ
ムを作成した時の溶接部の割れ発生個数とＮ含有量との
関係を示す図である。本発明にあっては第３図に示すよ
うに20ppm以下とすることにより従来の予想に反しアッ
プセットバット溶接後のホイールリム成形時の不良に対
し顕著な改善がみられるのである。N: N combines with Ti and precipitates as TiN, which significantly impairs the strengthening effect of Ti on steel, and during upset butt welding, this TiN forms a solid solution and the strengthening effect of Ti causes the NAZ portion to harden significantly, resulting in workability. Greatly reduced. Therefore, the content of N is set to 20 ppm or less, preferably 10 ppm or less. In the past, it was thought that the N content should be reduced in order to make Ti effective, but even in that case, it was thought that the effect would be saturated at about 50 ppm. Fig. 3 shows C 0.09%, Si
0.15%, Mn 1.5%, P 0.015%, S 0.002%, sol.Al
The relationship between the number of cracks generated in the weld and the N content when 80 wheel rims were made after upset butt welding from a hot rolled steel sheet of 2.5 mm thickness containing 0.004% and Ti 0.05% as basic components is shown. It is a figure. In the present invention, as shown in FIG. 3, by setting the content to 20 ppm or less, contrary to the conventional expectation, a remarkable improvement in defects during wheel rim molding after upset butt welding is observed.
sol.Al: Alはアップセットバット溶接時に酸化され介在
物として鋼中に残存し鋼の冷間加工性を低下させる。特
にTiの酸化物による冷間加工性の低下を抑えるためには
sol.Al含有量で0.005 ％未満に抑える必要がある。sol.
Alに関しては従来はむしろ鋼の強化のため積極的に添加
していた。第４図はＣ 0.09 ％、Si 0.15 ％、Mn 1.5
％、Ｐ0.015 ％、Ｓ 0.002％、Ti 0.05 ％、Ｎ 0.0005
％を基本成分とする2.5 mm厚の熱延鋼板からアップセッ
トバット溶接後、80個のホイールリムを作成した時の溶
接部の割れ発生個数とsol.Al含有量との関係を示す図で
ある。同図より明らかなごとくsol.Alを0.005 ％未満に
押さえると顕著な改善が見られる。sol.Al: Al is oxidized during upset butt welding and remains in the steel as inclusions to reduce the cold workability of the steel. In particular, in order to suppress deterioration of cold workability due to Ti oxide
The sol.Al content should be kept below 0.005%. sol.
In the past, Al was more positively added to strengthen the steel. Fig. 4 shows C 0.09%, Si 0.15%, Mn 1.5
%, P 0.015%, S 0.002%, Ti 0.05%, N 0.0005
FIG. 3 is a diagram showing the relationship between the number of cracks generated in the weld and the sol.Al content when 80 wheel rims were made after upset butt welding from a hot rolled steel sheet having a thickness of 2.5% and containing 100% as a basic component. . As is clear from the figure, when sol.Al is kept below 0.005%, a remarkable improvement is seen.
Nb、Ｖ: NbおよびＶはＣと結合し炭化物として析出する
ことにより鋼板を強化する。従って、本発明にあって必
要に応じて添加されるが所望の効果を確保するためには
それぞれの含有量の下限値はNb:0.005％、Ｖ:0.005％で
ある。しかし、それぞれNb:0.10 ％、Ｖ:0.20 ％を越え
て含有させてもその効果が飽和したり、逆にその作用効
果が低下したりするようになることからそれぞれの含有
量をNb:0.005〜0.10％、Ｖ:0.005〜0.20％と定めた。Nb, V: Nb and V strengthen the steel sheet by combining with C and precipitating as carbide. Therefore, in the present invention, although added as necessary, the lower limits of the respective contents are Nb: 0.005% and V: 0.005% in order to ensure the desired effect. However, even if the contents of Nb: 0.10% and V: 0.20% are exceeded, the effects will be saturated, and conversely the effects will be reduced. Therefore, the respective contents of Nb: 0.005- 0.10%, V: 0.005 to 0.20%.
Ca、Zrおよび希土類元素: これらの成分は何れも介在物
の形状を調整して冷間加工性を改善する作用を有する。
しかしその含有量がそれぞれCa: 0.002 ％未満、Zr:0.0
1 ％未満および希土類元素0.002 ％未満では前記作用に
よる所望の効果が得られず、一方、それぞれCa:0.01
％、Zr:0.10 ％および希土類元素: 0.10％を越えて含有
させると、逆に鋼中の介在物が多くなりすぎて冷間加工
性が劣化するようになることから、それぞれの含有量
を、Ca:0.002〜0.01％、Zr: 0.01〜0.10％、希土類元
素:0.002〜0.10％と定めた。Ca, Zr and rare earth elements: All of these components have the effect of adjusting the shape of inclusions and improving cold workability.
However, their contents are Ca: less than 0.002% and Zr: 0.0, respectively.
If it is less than 1% and less than 0.002% of the rare earth element, the desired effect due to the above-mentioned action cannot be obtained.
%, Zr: 0.10% and rare earth elements: 0.10%, the amount of inclusions in the steel becomes too large and the cold workability deteriorates. It was determined that Ca: 0.002 to 0.01%, Zr: 0.01 to 0.10%, and rare earth element: 0.002 to 0.10%.
次に、実施例によって本発明をさらに具体的に説明す
る。Next, the present invention will be described more specifically by way of examples.
実施例 第１表に示す化学組成の供試鋼を150 kg真空溶解炉で溶
製し、熱間鍛造するかまたは鋳型で60mm厚のスラブを製
造し、次いで熱間圧延により2.5 mm厚の熱延鋼板とし
た。熱間圧延は、スラブを溶製後直接あるいは1100〜12
50℃に再加熱後、仕上げ温度Ar３点以上で行った。この
各鋼板からJIS5号引張試験片を採取し、引張試験を行っ
た。結果を第２表に示す。Example A sample steel having the chemical composition shown in Table 1 was melted in a vacuum melting furnace of 150 kg and hot forged or a 60 mm thick slab was manufactured by a mold, and then hot rolled to a thickness of 2.5 mm. It was a rolled steel sheet. Hot rolling can be done directly after melting the slab or 1100-12
After reheating to 50 ° C., the finishing temperature Ar was 3 points or more. A JIS No. 5 tensile test piece was sampled from each of the steel plates and subjected to a tensile test. The results are shown in Table 2.
さらに、このようにして得た熱延板を第１図に示すよう
にアップセットバット溶接(イ)→成形(ロ)の工程を経てホ
イールリムを80個ずつ作成した。アップセットバット溶
接の種類と成形後の溶接部の割れ発生個数を第２表にあ
わせて示す。Further, as shown in FIG. 1, the hot-rolled sheet thus obtained was subjected to the steps of upset butt welding (a) → forming (b) to prepare 80 wheel rims each. Table 2 shows the types of upset butt welding and the number of cracks in the weld after forming.
本発明にかかる鋼板は50kgf/mm２以上の高強度を有する
とともにアップセットバット溶接後の成形性に優れてい
る。試験No.1 〜9 参照。他方、50kgf/mm２の高強度をT
i以外の元素により実現した試験No.10〜12、およびＣ、
Si、Mnのいずれかが本発明範囲を越えた試験No.13〜15
は、母材強度に比べHAZ 強度が上昇することにより、ま
たsol.Al含有量が本発明範囲を越えた試験No.16は介在
物の増加により、アップセットバット溶接後の成形性で
も劣っている。また、Ｎ含有量が本発明の範囲を超えた
試験No.17はTi添加量に対し強度が低く、アップセット
バット溶接後の成形性でも劣っている。The steel sheet according to the present invention has a high strength of 50 kgf / mm 2 or more and is excellent in formability after upset butt welding. See Test Nos. 1-9. On the other hand, a high strength of 50 kgf / mm 2
Test Nos. 10 to 12 and C realized by elements other than i
Test No. 13 to 15 in which either Si or Mn exceeds the range of the present invention
The HAZ strength is higher than the base metal strength, and the test No. 16 in which the sol.Al content exceeds the range of the present invention is also inferior in formability after upset butt welding due to an increase in inclusions. There is. Further, Test No. 17 in which the N content exceeds the range of the present invention has low strength with respect to the Ti addition amount, and the formability after upset butt welding is also inferior.
（発明の効果） 以上の説明から明らかなように、本発明にかかる熱延鋼
板は、50kgf/mm２以上の引張り強さを有し、しかもアッ
プセットバット溶接性にも優れ、ホイールリム用として
用いると重量低減、燃費向上に大いに寄与するものであ
る。 (Effects of the Invention) As is clear from the above description, the hot-rolled steel sheet according to the present invention has a tensile strength of 50 kgf / mm 2 or more and is also excellent in upset butt weldability and is suitable for wheel rims. When used, it greatly contributes to weight reduction and fuel efficiency improvement.
第１図（イ）は、ホイールリム素材円筒体の略式斜視
図； 第１図（ロ）は、成形後のホイールリムの略式側面図；
および 第２図〜第４図は、本発明における各添加元素の影響を
示すグラフである。FIG. 1 (a) is a schematic perspective view of a wheel rim material cylinder; FIG. 1 (b) is a schematic side view of a wheel rim after molding;
And FIGS. 2 to 4 are graphs showing the influence of each additive element in the present invention.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭58−199845（ＪＰ，Ａ) 特開 昭58−141365（ＪＰ，Ａ) 特開 昭57−155348（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-58-199845 (JP, A) JP-A-58-141365 (JP, A) JP-A-57-155348 (JP, A)
Claims (2)
バット溶接に適した高張力熱延鋼板。[Claim 1] C: 0.03 to 0.20% by weight, Si: 1.0% or less, Mn: 2.0% or less, P: 0.05% or less, S: 0.05% or less, sol.Al: less than 0.005%, N: 20ppm Below, Ti: 0.01 to 0.10%, and the balance is iron and inevitable impurities. A high-strength hot-rolled steel sheet suitable for upset butt welding with a tensile strength of 50 kgf / mm 2 or more.
なくとも１種以上から成る第１群、ならびにCa: 0.002
〜0.01％、Zr:0.01 〜0.10％および希土類元素:0.002〜
0.10％の少なくとも１種以上からなる第２群のうち少な
くとも１群以上を含み、 残部鉄および不可避不純物 からなる引張強さ50kgf/mm２以上を有するアップセット
バット溶接に適した高張力熱延鋼板。[Claim 2] C: 0.03 to 0.20% by weight, Si: 1.0% or less, Mn: 2.0% or less, P: 0.05% or less, S: 0.05% or less, sol.Al: 0.005% or less, N: 20ppm Hereinafter, a first group containing at least one of Ti: 0.01 to 0.10% and Nb: 0.005 to 0.10% and V: 0.005 to 0.20%, and Ca: 0.002
〜0.01%, Zr: 0.01〜0.10% and rare earth element: 0.002〜
A high-strength hot-rolled steel sheet suitable for upset butt welding having a tensile strength of 50 kgf / mm 2 or more containing at least one or more second group consisting of 0.10% or more of at least one type and having a balance of iron and unavoidable impurities. .
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16116889A JPH0653911B2 (en) | 1989-06-23 | 1989-06-23 | High-strength hot-rolled steel sheet suitable for upset butt welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16116889A JPH0653911B2 (en) | 1989-06-23 | 1989-06-23 | High-strength hot-rolled steel sheet suitable for upset butt welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0328346A JPH0328346A (en) | 1991-02-06 |
| JPH0653911B2 true JPH0653911B2 (en) | 1994-07-20 |
Family
ID=15729889
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16116889A Expired - Lifetime JPH0653911B2 (en) | 1989-06-23 | 1989-06-23 | High-strength hot-rolled steel sheet suitable for upset butt welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0653911B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007138238A (en) * | 2005-11-17 | 2007-06-07 | Jfe Steel Kk | High strength steel sheet and its manufacturing method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20020094721A (en) * | 2001-06-13 | 2002-12-18 | 현대자동차주식회사 | Panel material having ultra-high strength for Road Wheel Disc |
-
1989
- 1989-06-23 JP JP16116889A patent/JPH0653911B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007138238A (en) * | 2005-11-17 | 2007-06-07 | Jfe Steel Kk | High strength steel sheet and its manufacturing method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0328346A (en) | 1991-02-06 |
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