JPS6466078A - Heat treatment of weld joint part excellent in strength and stiffness - Google Patents
Heat treatment of weld joint part excellent in strength and stiffnessInfo
- Publication number
- JPS6466078A JPS6466078A JP22142787A JP22142787A JPS6466078A JP S6466078 A JPS6466078 A JP S6466078A JP 22142787 A JP22142787 A JP 22142787A JP 22142787 A JP22142787 A JP 22142787A JP S6466078 A JPS6466078 A JP S6466078A
- Authority
- JP
- Japan
- Prior art keywords
- steel
- joint part
- weld joint
- stiffness
- transformation point
- 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.)
- Pending
Links
Landscapes
- Heat Treatment Of Articles (AREA)
Abstract
PURPOSE:To improve strength and stiffness by subjecting a steel to butt resistance welding, holding a weld joint part by heating it more than the AC3 transformation point of the steel rapidly cooling the weld joint part at the specified cooling speed and annealing to the temp. of >= the specified temp. and <= the AC1 transformation point of the steel. CONSTITUTION:Steel tubes 10, 12 are supported so that the end faces are mutually faced, the tube 10 is fixed on the tube 12 is movable. Electrodes 14, 16 are fitted to the steel tubes 10, 12 and a current is fed by a transformer 18 and control device 20. The specified flashing current is passed in the gap of the tubes 10, 12, the mutual end faces are heated and after electrifying them as they are a large current is passed for several second with upsetting the pipe 12 on the pipe 10 and the electrification is stopped. The weld joint part is thereafter held by heating at >= the AC3 transformation point of the steel by a gas flame, etc., in succession rapidly cooled at the cooling speed of >=5 deg.C/min and by annealing it to the temp. of >=00 deg.C and <= the AC1 transformation point of the steel the weld joint part excellent in the strength and stiffness is obtd.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22142787A JPS6466078A (en) | 1987-09-04 | 1987-09-04 | Heat treatment of weld joint part excellent in strength and stiffness |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP22142787A JPS6466078A (en) | 1987-09-04 | 1987-09-04 | Heat treatment of weld joint part excellent in strength and stiffness |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS6466078A true JPS6466078A (en) | 1989-03-13 |
Family
ID=16766572
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP22142787A Pending JPS6466078A (en) | 1987-09-04 | 1987-09-04 | Heat treatment of weld joint part excellent in strength and stiffness |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6466078A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5422710A (en) * | 1992-02-14 | 1995-06-06 | Mita Industrial Co., Ltd. | Sheet discharging device for use in an image forming apparatus |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5143985A (en) * | 1974-10-12 | 1976-04-15 | Kec Kk | |
JPS5819438A (en) * | 1981-07-28 | 1983-02-04 | Sumitomo Metal Ind Ltd | Production of steel pipe having high strength and high toughness |
JPS5943826A (en) * | 1982-09-04 | 1984-03-12 | Sumitomo Metal Ind Ltd | Manufacture of high toughness electric welded steel pipe |
-
1987
- 1987-09-04 JP JP22142787A patent/JPS6466078A/en active Pending
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5143985A (en) * | 1974-10-12 | 1976-04-15 | Kec Kk | |
JPS5819438A (en) * | 1981-07-28 | 1983-02-04 | Sumitomo Metal Ind Ltd | Production of steel pipe having high strength and high toughness |
JPS5943826A (en) * | 1982-09-04 | 1984-03-12 | Sumitomo Metal Ind Ltd | Manufacture of high toughness electric welded steel pipe |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US5422710A (en) * | 1992-02-14 | 1995-06-06 | Mita Industrial Co., Ltd. | Sheet discharging device for use in an image forming apparatus |
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