JPS5693821A - Production of steel pipe having excellent crushing strength - Google Patents
Production of steel pipe having excellent crushing strengthInfo
- Publication number
- JPS5693821A JPS5693821A JP17026679A JP17026679A JPS5693821A JP S5693821 A JPS5693821 A JP S5693821A JP 17026679 A JP17026679 A JP 17026679A JP 17026679 A JP17026679 A JP 17026679A JP S5693821 A JPS5693821 A JP S5693821A
- Authority
- JP
- Japan
- Prior art keywords
- steel pipe
- crushing strength
- production
- conditions
- annealing
- 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
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)
Abstract
PURPOSE:To efficiently enhance the crushing strength of a steel pipe by specifying the conditions for making fine austenite crystal grains and for removing the residual stress generated at cold correction process. CONSTITUTION:A rolled steel pipe is heat-treated with an induction heating process to adjust its austenite grains to more than ASTM No.8. After cold correction, the residual stress is removed by annealing in inductive heating process at 500 deg.C or more, maintained for 10sec to 5min, under the conditions of 15X10<3=M<=17X 10<3> and M=T(16.5+logt) where T is heating temperature ( deg.K), t is maintained time (s), and M is parameter for stress removing annealing. By this process, the crushing strength can be enhanced to more than API Bul5C2 without deteriorating the resistance to sulfide corrosion cracking.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17026679A JPS5693821A (en) | 1979-12-28 | 1979-12-28 | Production of steel pipe having excellent crushing strength |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP17026679A JPS5693821A (en) | 1979-12-28 | 1979-12-28 | Production of steel pipe having excellent crushing strength |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5693821A true JPS5693821A (en) | 1981-07-29 |
Family
ID=15901743
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP17026679A Pending JPS5693821A (en) | 1979-12-28 | 1979-12-28 | Production of steel pipe having excellent crushing strength |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5693821A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103459618A (en) * | 2011-02-18 | 2013-12-18 | 悬挂***股份有限公司 | Method for manufacturing high-strength steel sheet parts subject in use to fatigue stresses |
-
1979
- 1979-12-28 JP JP17026679A patent/JPS5693821A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103459618A (en) * | 2011-02-18 | 2013-12-18 | 悬挂***股份有限公司 | Method for manufacturing high-strength steel sheet parts subject in use to fatigue stresses |
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