JPS5629627A - Manufacture of high strength steel pipe having good weldability for use at ordinary and medium temperature zone - Google Patents
Manufacture of high strength steel pipe having good weldability for use at ordinary and medium temperature zoneInfo
- Publication number
- JPS5629627A JPS5629627A JP10575979A JP10575979A JPS5629627A JP S5629627 A JPS5629627 A JP S5629627A JP 10575979 A JP10575979 A JP 10575979A JP 10575979 A JP10575979 A JP 10575979A JP S5629627 A JPS5629627 A JP S5629627A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- high strength
- ordinary
- manufacture
- 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.)
- Granted
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Mechanical Engineering (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
- Arc Welding In General (AREA)
Abstract
PURPOSE:To manufacture the steel pipe having high strength at ordinary and medium temperatues and good weldability by a method in which the steel pipe containing given proportions of C, Si, Mn, Mo, V, and Al is heated at a temperature higher than the point Ac3, hardened, and then tempered at a temperature lower than the point Ac1. CONSTITUTION:The steel pipe, consisting of 0.03-0.15wt% C, 0.01-0.80wt% Si, 0.50-2.00wt% Mn, 0.01-0.30wt% Mo, 0.005-0.10wt% V, 0.001-0.10wt% Al, and the balance Fe, is heat-treated in the following; that is, the steel pipe is heated at a temperature higher than the point Ac3, hardened to form an uniform austenite structure, and then tempered at a temperature higher than 600 deg.C but below the point Ac1. Thus, the steel pipe, although its C content is reduced, can keep a sufficiently high strength in a temperature range from ordinary temperature to 450 deg.C and also its coupling portion can keep a sufficiently high strength in the said temperature range even when undergone reheating at the welding time.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10575979A JPS6027731B2 (en) | 1979-08-20 | 1979-08-20 | Method for manufacturing steel pipes for steam transport that exhibit high strength in the medium temperature range of 200 to 450°C |
CA358,149A CA1131105A (en) | 1979-08-20 | 1980-08-13 | Method of producing high-strength steel pipes having a good weldability and adapted to be used in a steam distribution pipeline in the oil sands development |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10575979A JPS6027731B2 (en) | 1979-08-20 | 1979-08-20 | Method for manufacturing steel pipes for steam transport that exhibit high strength in the medium temperature range of 200 to 450°C |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5629627A true JPS5629627A (en) | 1981-03-25 |
JPS6027731B2 JPS6027731B2 (en) | 1985-07-01 |
Family
ID=14416141
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP10575979A Expired JPS6027731B2 (en) | 1979-08-20 | 1979-08-20 | Method for manufacturing steel pipes for steam transport that exhibit high strength in the medium temperature range of 200 to 450°C |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS6027731B2 (en) |
CA (1) | CA1131105A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6210212A (en) * | 1985-07-08 | 1987-01-19 | Nippon Kokan Kk <Nkk> | Production of bend pipe |
JPH05263193A (en) * | 1992-03-18 | 1993-10-12 | Nippon Steel Corp | High strength electrically welded steel tube for boiler excellent in softening resistance at the time of stress relieving annealing |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011021396A1 (en) * | 2009-08-21 | 2011-02-24 | 住友金属工業株式会社 | Method for manufacturing thick-walled seamless steel pipe |
CN106048442B (en) * | 2016-05-31 | 2018-05-01 | 攀钢集团攀枝花钢铁研究院有限公司 | Pipe line steel containing vanadium and its production method |
-
1979
- 1979-08-20 JP JP10575979A patent/JPS6027731B2/en not_active Expired
-
1980
- 1980-08-13 CA CA358,149A patent/CA1131105A/en not_active Expired
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS6210212A (en) * | 1985-07-08 | 1987-01-19 | Nippon Kokan Kk <Nkk> | Production of bend pipe |
JPH0138851B2 (en) * | 1985-07-08 | 1989-08-16 | Nippon Kokan Kk | |
JPH05263193A (en) * | 1992-03-18 | 1993-10-12 | Nippon Steel Corp | High strength electrically welded steel tube for boiler excellent in softening resistance at the time of stress relieving annealing |
Also Published As
Publication number | Publication date |
---|---|
JPS6027731B2 (en) | 1985-07-01 |
CA1131105A (en) | 1982-09-07 |
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