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THE METHOD FOR MULTI-STEP HEAT TREATMENT OF ELECTRIC RESISTANCE WELDED PIPE WITH A FUNCTION OF IMPROVED IMPACT TOUGHNESS AND REDUCED HARDNESS DEVIATION AND THE MANUFACTURING METHOD OF THE PIPE
THE METHOD FOR MULTI-STEP HEAT TREATMENT OF ELECTRIC RESISTANCE WELDED PIPE WITH A FUNCTION OF IMPROVED IMPACT TOUGHNESS AND REDUCED HARDNESS DEVIATION AND THE MANUFACTURING METHOD OF THE PIPE
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机译：具有改善的冲击韧性和减小的硬度偏差的功能的电阻焊管的多步热处理方法及该管的制造方法
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摘要
PURPOSE: The multi-staged heat-treating method of an electric-resistance welded steel pipe and a method for manufacturing the steel pipe are provided to micronize the welding structure of the electric-resistance welded steel pipe by implementing a quenching operation and subsequently a tempering process. CONSTITUTION: The multi-staged heat-treating method of an electric-resistance welded steel pipe includes the following: the welding part of an electric-resistance welded steel pipe is heated at a temperature between 900 and 1000 degrees Celsius to an austenite transformation point, and the heated steel pipe is rapidly cooled to the room temperature to be quenched(S100); and the cooled steel pipe is slowly cooled to be tempered at a temperature between 650 and 950 degrees Celsius(S200).
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