To provide a heat treatment method and a heat treating facility for a steel pipe, which control the occurrence of material difference or outer diameter deformation in the steel pipe, can perform uniform heat treatment, and secure high strength and high workability.
The heat treatment method for a steel pipe performs heat treatment to the steel pipe by heating and cooling the steel pipe. The heat treatment method for the steel pipe includes: a heating step of heating the steel pipe to the Ac3 temperature or more; a soaking step of maintaining the heated steel pipe at the Ac3 temperature or more so as to soak the steel pipe; an air-cooling step of air-cooling the soaked steel pipe to an Ac1-3 temperature range; and a quenching step of quenching the air-cooled steel pipe by water-cooling.
NAKAMURA HIDEYUKI
YAMAMOTO RYUJI
| JPH0387317A | 1991-04-12 | |||
| JPH06192740A | 1994-07-12 | |||
| JPS6251164U | 1987-03-30 | |||
| JPS54118316A | 1979-09-13 |
| WO2008123025A1 | 2008-10-16 |
Tetsuo Kanamoto
Miaki Kametani
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