JPH046219A - Production of high tensile strength resistance welded tube - Google Patents
Production of high tensile strength resistance welded tubeInfo
- Publication number
- JPH046219A JPH046219A JP10963890A JP10963890A JPH046219A JP H046219 A JPH046219 A JP H046219A JP 10963890 A JP10963890 A JP 10963890A JP 10963890 A JP10963890 A JP 10963890A JP H046219 A JPH046219 A JP H046219A
- Authority
- JP
- Japan
- Prior art keywords
- resistance welded
- pipe
- rolling
- steel
- production
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 33
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 37
- 239000010959 steel Substances 0.000 claims abstract description 37
- 238000005096 rolling process Methods 0.000 claims abstract description 11
- 238000010438 heat treatment Methods 0.000 claims abstract description 7
- 239000000463 material Substances 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 13
- 238000003466 welding Methods 0.000 abstract description 12
- 238000001556 precipitation Methods 0.000 abstract description 9
- 238000005097 cold rolling Methods 0.000 abstract 2
- 238000005098 hot rolling Methods 0.000 abstract 2
- 239000012535 impurity Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 description 18
- 230000002950 deficient Effects 0.000 description 5
- 238000005496 tempering Methods 0.000 description 5
- 238000010791 quenching Methods 0.000 description 4
- 230000000171 quenching effect Effects 0.000 description 4
- 238000004804 winding Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000007779 soft material Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229910000655 Killed steel Inorganic materials 0.000 description 1
- 229910000746 Structural steel Inorganic materials 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
Landscapes
- Heat Treatment Of Steel (AREA)
Abstract
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は高張力の電縫鋼管の製造方法に関する。[Detailed description of the invention] [Industrial application field] The present invention relates to a method for manufacturing high-tensile resistance welded steel pipes.
自動車等の構造部材及び駆動伝達部材として使用される
機械構造用鋼管では燃費向上のために軽量化を検討して
おり、その方策の一つとして高張力化することが行なわ
れている。In order to improve fuel efficiency, efforts are being made to reduce the weight of mechanical structural steel pipes used as structural members and drive transmission members for automobiles, etc., and one of the measures is to increase the tensile strength.
高張力電縫鋼管の製造方法は従来２タイプがあり、一つ
は特開昭５２−１１４５１９号公報等に記載されている
ような方法で銅板自体を高張力化し、その後電縫造管す
ることにより製造する方法であり、二つ目は電縫造管後
、調質、即ち焼き入れまたは焼き入れ焼き戻しをするこ
とにより製造する方法である。Conventionally, there are two types of manufacturing methods for high-tensile resistance welded steel pipes. One is to increase the tensile strength of the copper plate itself using the method described in Japanese Patent Application Laid-open No. 52-114519, etc., and then form the electric resistance welded pipe. The second method is to manufacture the pipe by tempering, that is, quenching or quenching and tempering, after forming the electric resistance welded pipe.
従来の技術の項に記載の方法には上記のように２タイプ
がある。第３図は一般的な電縫鋼管の製造工程である。There are two types of methods described in the prior art section, as described above. Figure 3 shows a typical manufacturing process for electric resistance welded steel pipes.
一般には成形・溶接・定型したままか、あるいはその後
熱処理をする。この熱処理の目的は電縫溶接部の均質化
或は延性の確保のためである。しかし、前記の工程で高
張力鋼管を製造しようとすれば、鋼板自体を高張力化し
、その後電縫造管することにより製造することになり、
鋼板自体が高張力であるため電縫造管時のロール成形が
困難であり、そのため電縫溶接時の形状が不良となり、
電縫溶接不良となる。二つ目の電縫造管後、調質、即ち
焼き入れまたは焼き入れ焼き戻しをすることにより製造
する方法では、調質コストが非常に高く、前者等の方法
が採れなく、やむを得ない場合を除いては一般的ではな
い。Generally, it is molded, welded, and shaped as it is, or it is then heat treated. The purpose of this heat treatment is to homogenize or ensure ductility of the electric resistance welded part. However, if you try to manufacture high-tensile steel pipes using the above process, you will have to increase the tensile strength of the steel plate itself, and then manufacture it by making electric resistance welded pipes.
Because the steel plate itself has high tensile strength, it is difficult to roll form it when making ERW pipes, resulting in poor shapes during ERW welding.
ERW welding becomes defective. In the second method, which involves tempering, that is, quenching or quenching and tempering, after forming the ERW pipe, the cost of tempering is very high, and there are cases where the former method cannot be used and is unavoidable. It is not common except for
本発明はこのような高張力電縫鋼管の製造方法での問題
点を解決することを目的とするものである。It is an object of the present invention to solve these problems in the method of manufacturing high-tensile resistance welded steel pipes.
本発明の要旨とするところは下記のとおりである。 The gist of the present invention is as follows.
（１）成分組成が重量でＣ：０．１０〜０．６５％、Ｓ
ｉ： ０．０５〜０．６０％、Ｍｎ： ０．２５〜
２．０％、Ｔｉ：０．０２０〜０．１５０％、Ｃｒ：
０．１〜１．０％を基本成分とし、残部Ｆｅ及び不可避
的元素よりなる電縫鋼管の製造に当り、管用鋼材の熱間
板厚圧延時に４００〜６００℃又は７００〜７５０℃に
て巻取り、造管後６００〜７００℃で熱処理をすること
を特徴とする高張力電縫鋼管の製造方法。(1) Component composition by weight: C: 0.10-0.65%, S
i: 0.05~0.60%, Mn: 0.25~
2.0%, Ti: 0.020-0.150%, Cr:
In the production of ERW steel pipes whose basic component is 0.1 to 1.0% and the balance is Fe and other unavoidable elements, rolling is carried out at 400 to 600°C or 700 to 750°C during hot plate thickness rolling of pipe steel materials. A method for producing a high-tensile resistance welded steel pipe, which comprises: removing the steel pipe from the steel pipe, and heat-treating the pipe at 600 to 700°C after forming the pipe.
（２）前項ｌ記載の電縫鋼管の製造方法において、熱間
板厚圧延後に冷間板厚圧延ないしは造管オンライン冷間
板厚圧延を付加することを特徴とする高張力電縫鋼管の
製造方法。(2) Production of high-strength ERW steel pipes in the method for manufacturing ERW steel pipes as described in the preceding paragraph 1, characterized in that cold plate thickness rolling or online cold plate thickness rolling for pipe production is added after hot plate thickness rolling. Method.
以下に本発明の詳細な説明する。第１図に請求項１記載
の発明に従った製造工程を示す。The present invention will be explained in detail below. FIG. 1 shows a manufacturing process according to the invention as claimed in claim 1.
従来の工程では前記したように高張力鋼管を製造しよう
とすれば、鋼板自体を高張力化し、その後電縫造管する
ので、鋼板自体が高張力であるため電縫造管時のロール
成形が困難であり、そのため電縫溶接時の形状が不良と
なり、電縫溶接不良となる。そこで本発明では鋼板自体
は成形可能な柔らかい材質とし、造管後の熱処理温度を
コントロールすることにより、高強度鋼管を製造しよう
とするものである。In the conventional process, as mentioned above, to manufacture high-tensile steel pipes, the steel plate itself is made to have a high tensile strength and then the ERW pipe is formed. This is difficult, and as a result, the shape during electric resistance welding becomes defective, resulting in defective electric resistance welding. Therefore, in the present invention, the steel plate itself is made of a soft material that can be formed, and a high-strength steel pipe is manufactured by controlling the heat treatment temperature after pipe forming.
まづ本発明に使用する鋼板の成分の限定理由を説明する
。First, the reasons for limiting the components of the steel plate used in the present invention will be explained.
Ｃ量は少なければ延性が良好であり、加工性に優れてい
るが、所要の強度が得られないことから下限を０．１０
％とした。又、０．６５％を超えると造管時の成形性等
の冷間加工性及び靭性が低下する傾向にあり、又、電縫
鋼管の造管溶接時に熱影響部が硬化し、加工性が低下す
ることから、上限を０．６５％とした。If the amount of C is small, the ductility is good and the workability is excellent, but since the required strength cannot be obtained, the lower limit is set to 0.10.
%. Moreover, if it exceeds 0.65%, cold workability such as formability during pipe manufacturing and toughness tend to decrease, and the heat affected zone hardens during pipe manufacturing welding of ERW steel pipes, resulting in poor workability. Therefore, the upper limit was set at 0.65%.
Ｓｉはキルド綱の場合、０．０５％未満におさえること
は製鋼技術上難しく、又、０．６０％を超えると延靭性
に悪影響を及ぼし、又スケール生成による表面性状の悪
化の点から、０．６０％を上限とした。In the case of killed steel, it is difficult to suppress Si to less than 0.05% due to steel manufacturing technology, and if it exceeds 0.60%, it will have a negative effect on ductility and toughness, and the surface quality will deteriorate due to scale formation. The upper limit was set at .60%.
Ｍｎについては、強度面から０，２５％未満では強度不
足となり、又２．０％を超えると造管時の成形加工等の
加工時に延靭性の不足から亀裂が発生することがあるこ
とから、下限を０．２５％、上限を２．０％とした。Regarding Mn, from the viewpoint of strength, if it is less than 0.25%, the strength will be insufficient, and if it exceeds 2.0%, cracks may occur due to insufficient ductility during processing such as forming during pipe making. The lower limit was set to 0.25%, and the upper limit was set to 2.0%.
Ｔｉは高強度化のための重要な元素であるが、０、０２
０％未満では強度不足となり、０．１５０％を趙えて添
加しても効果の向上のないことから、下限を０．０２０
％、上限を０．１５０％とした。Ti is an important element for increasing strength, but 0,02
If it is less than 0%, the strength will be insufficient, and even if 0.150% is added, the effect will not improve, so the lower limit is set to 0.020.
%, with an upper limit of 0.150%.
Ｃｒは管同士の継手溶接時の軟化を防ぐための重要な元
素であるが、０．１％未満では耐軟化性に効果なく、１
．０％を超えて添加する必要もないことから、下限を０
．１％、上限を１．０％とした。Cr is an important element to prevent softening when welding joints between pipes, but if it is less than 0.1%, it has no effect on softening resistance, and 1%
．． There is no need to add more than 0%, so the lower limit is set to 0.
．． 1%, with an upper limit of 1.0%.
次に製造工程について説明する。Next, the manufacturing process will be explained.
本発明に従い、上記成分の綱を熱間板厚圧延時に４００
〜６００℃又は７００〜７５０℃にて巻取る。これはＴ
ｉの析出効果を防いで、なるべく柔らかい材質にするた
めであり、４００℃未満ではＴｉの析出効果は少ないも
のの、却って冷速か速く強度が上昇し、靭性も低下する
。６００℃超〜７００℃未満はＴｉの析出効果が最も存
在するところである。７５０℃超は製造上不可能である
。よって、上記成分の鋼を熱間板厚圧延時に４００〜６
００℃又は７００〜７５０℃にて巻取ることによって、
Ｔｉの析出効果の少ない、比較的柔らかい材質とするこ
とができる。According to the present invention, a steel having the above components is rolled to a thickness of 400
Wind up at ~600°C or 700-750°C. This is T
This is to prevent the precipitation effect of Ti and to make the material as soft as possible. If the temperature is lower than 400°C, the precipitation effect of Ti is small, but the strength increases rather quickly and the toughness decreases. Above 600°C and below 700°C, the precipitation effect of Ti is most present. Temperatures exceeding 750°C are impossible for manufacturing purposes. Therefore, when steel with the above components is hot rolled to a thickness of 400 to 6
By winding at 00℃ or 700-750℃,
It can be made of a relatively soft material with little Ti precipitation effect.
この巻取工程後に造管するが、比較的柔らかい材質とな
っているため、従来問題であった成形・溶接上の問題は
全くなく、高品質の電縫鋼管を造管することができる。After this winding process, the pipe is formed, and since the material is relatively soft, there are no problems with forming or welding, which were conventional problems, and high-quality electric resistance welded steel pipes can be formed.
次に造管後の熱処理であるが、この熱処理によりＴｉの
析出効果を出させる。すなわち、６００〜７００℃で熱
処理を行なう。６００℃未満ではＴｉの析出効果が少な
く、７００℃超でもＴｉが十分析出せず、いずれも十分
な析出効果が得られない。Next is the heat treatment after pipe forming, which produces the effect of Ti precipitation. That is, heat treatment is performed at 600 to 700°C. Below 600°C, the precipitation effect of Ti is small, and even above 700°C, Ti cannot be sufficiently analyzed, and in both cases, a sufficient precipitation effect cannot be obtained.
以上本発明について説明したが、請求項２記載の方法で
もよい。第２図は請求項２記載の方法に従った工程を示
すものであるが、このように造管オンライン冷間板厚圧
延を付加することにより、更により高張力の鋼管を製造
することができる。Although the present invention has been described above, a method according to claim 2 may also be used. FIG. 2 shows the process according to the method according to claim 2, and by adding online cold plate thickness rolling for pipe production in this way, it is possible to manufacture steel pipes with even higher tensile strength. .
本発明を実施例に基づいて説明する。The present invention will be explained based on examples.
サイズφ１０１．６ ｘｔ４．４の電縫鋼管を本発明法
と従来法により造管した結果を第１表に比較して示した
。Table 1 shows a comparison of the results of making electric resistance welded steel pipes of size φ101.6 x t4.4 by the method of the present invention and the conventional method.
第１表に示す通り、本発明によれば、巻取り温度を調整
することにより造管可能な鋼板強度とし、造管後、更に
熱処理することにより高強度の電縫鋼管を得ることがで
きる。As shown in Table 1, according to the present invention, by adjusting the winding temperature, the strength of the steel plate can be achieved so that it can be made into a pipe, and after the pipe production, by further heat-treating, a high-strength electric resistance welded steel pipe can be obtained.
従来の工程で高張力鋼管を製造しようとすれば、綱板自
体を高張力化し、その後電縫造管することにより製造す
ることになり、鋼板自体が高張力であるため電縫造管時
のロール成形が困難であり、そのため電縫溶接時の形状
が不良となり、電縫溶接不良となっていたが、本発明に
よれば、成形・溶接上の問題なしに且つ経済的に高張力
電縫鋼管を製造することが可能となるので、産業上に貢
献するところが極めて大である。If we were to manufacture high-tensile steel pipes using the conventional process, we would have to make the steel plates themselves high-tension and then manufacture them by ERW pipe-making. Roll forming is difficult, and as a result, the shape during ERW welding becomes defective, resulting in defective ERW welding. However, according to the present invention, high-tension ERW welding can be performed economically without any problems in forming or welding. Since it becomes possible to manufacture steel pipes, the contribution to industry is extremely large.
第１図は請求項１記載の方法の製造工程、第２図は請求
項２記載方法の製造工程、第３図は従来の製造工程を夫
々示す図である。FIG. 1 shows the manufacturing process of the method according to claim 1, FIG. 2 shows the manufacturing process of the method according to claim 2, and FIG. 3 shows the conventional manufacturing process.
Claims (2)
ｉ：０．０５〜０．６０％、Ｍｎ：０．２５〜２．０％
、Ｔｉ：０．０２０〜０．１５０％、Ｃｒ：０．１〜１
．０％を基本成分とし、残部Ｆｅ及び不可避的元素より
なる電縫鋼管の製造に当り、管用鋼材の熱間板厚圧延時
に４００〜６００℃又は７００〜７５０℃にて巻取り、
造管後６００〜７００℃で熱処理をすることを特徴とす
る高張力電縫鋼管の製造方法。(1) Component composition by weight: C: 0.10-0.65%, S
i: 0.05-0.60%, Mn: 0.25-2.0%
, Ti: 0.020-0.150%, Cr: 0.1-1
．． 0% as a basic component, and the remainder being Fe and unavoidable elements.In the production of electric resistance welded steel pipes, the steel material for pipes is rolled at 400 to 600°C or 700 to 750°C during hot plate thickness rolling,
A method for producing a high-strength electric resistance welded steel pipe, which comprises performing heat treatment at 600 to 700°C after pipe formation.
間板厚圧延後に冷間板厚圧延ないしは造管オンライン冷
間板厚圧延を付加することを特徴とする高張力電縫鋼管
の製造方法。(2) The method for producing an ERW steel pipe according to claim 1, wherein cold plate thickness rolling or on-line cold plate thickness rolling is added after hot plate thickness rolling. Production method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10963890A JPH0713259B2 (en) | 1990-04-25 | 1990-04-25 | High-strength ERW pipe manufacturing method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP10963890A JPH0713259B2 (en) | 1990-04-25 | 1990-04-25 | High-strength ERW pipe manufacturing method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH046219A true JPH046219A (en) | 1992-01-10 |
| JPH0713259B2 JPH0713259B2 (en) | 1995-02-15 |
Family
ID=14515362
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP10963890A Expired - Fee Related JPH0713259B2 (en) | 1990-04-25 | 1990-04-25 | High-strength ERW pipe manufacturing method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0713259B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2048258A1 (en) | 2002-11-20 | 2009-04-15 | Nippon Steel Corporation | Honeycomb bodies employing high Al stainless steel sheet and process for production thereof |
-
1990
- 1990-04-25 JP JP10963890A patent/JPH0713259B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2048258A1 (en) | 2002-11-20 | 2009-04-15 | Nippon Steel Corporation | Honeycomb bodies employing high Al stainless steel sheet and process for production thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0713259B2 (en) | 1995-02-15 |
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