Effects of post-weld heat treatment cycles on microstructure and mechanical properties of electric resistance welded pipe welds

被引：32

作者：

Chung, P. C. ^{[1
]}

Ham, Yoonjin ^{[1
]}

Kim, Sanghoon ^{[1
]}

Lim, Jeongho ^{[2
]}

Lee, Changhee ^{[1
]}

机构：

[1] Hanyang Univ, Div Engn & Mat Sci, Seoul 133791, South Korea

[2] HYUNDAI HYSCO, Ulsan 683711, South Korea

来源：

MATERIALS & DESIGN | 2012年 / 34卷

关键词：

Heat treatments; Welding; Microstructure; IMPACT PROPERTIES; CONTROL-SYSTEM; STEEL; HARDNESS;

D O I：

10.1016/j.matdes.2011.05.027

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Two post-weld heat treatment cycles of one-step normalizing and two-step quenching and tempering have been performed by Gleeble, a thermo-mechanical simulator, to improve the toughness of fine-grained electric resistance welded pipe welds. Comparison was made to API X65 grade steel, which is widely used for pipeline parts. Microstructural evolution was investigated by optical microscopy and transmission electron microscopy. Vickers hardness and Charpy V-notch impact toughness tests were used to evaluate the mechanical properties. While the mechanical properties of one-step normalizing heat treatment satisfied the API specification, the two-step quenching and tempering heat treatments were conditional upon tempering temperature for X65 grade and fine-grained steels. As a result, a one-step normalizing heat treatment was more effective for both steel pipes. (C) 2011 Elsevier Ltd. All rights reserved.

引用

页码：685 / 690

页数：6

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