Improvement measures study on the cooling of postweld heat treatment of large diameter and thick wall 9% Cr steel pipe

Abstract

Abstract:

This paper introduced the common problems in the cooling process of postweld heat treatment of large diameter and thick wall 9% Cr steel pipe, analyzed its reasons, proposed some improvement measures, and conducted a contrast test. Through changing cladding method of thermal insulating cotton, the problems of lower cooling rate and curve bifurcation at the later cooling period of postweld heat treatment of large diameter and thick wall 9% Cr steel pipe are effectively solved, which improves the quality and efficiency of postweld heat treatment.

Key words:

thermal power, 9% Cr steel, postweld heat treatment, high temperature tempering brittleness

LIU Baoshuang, CHEN Chunhui.

Improvement measures study on the cooling of postweld heat treatment of large diameter and thick wall 9% Cr steel pipe

[J]. Huadian Technology, 2017, 39(2): 60-61.

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Improvement measures study on the cooling of postweld heat treatment of large diameter and thick wall 9% Cr steel pipe

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