Effects of Cr content on microstructure and properties of low alloy corrosion resistant pipeline steel weld joints

被引：0

作者：

Hu, Li-Hua ^{[1
]}

Zhang, Lei ^{[1
]}

Xu, Li-Ning ^{[1
]}

Lu, Min-Xu ^{[1
]}

机构：

[1] School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China

来源：

Cailiao Rechuli Xuebao/Transactions of Materials and Heat Treatment | 2010年 / 31卷 / 03期

关键词：

Chromium alloys - Heat affected zone - Hardness - Pipeline corrosion - Pipelines - Corrosion resistance - Corrosion resistant alloys - Steel corrosion - Steel pipe - Inert gases - Weld decay;

D O I：

暂无

中图分类号：

学科分类号：

摘要：

Low alloy corrosion resistant pipeline steels containing 1wt%~5wt% Cr were welded by tungsten inert gas welding (TIG), and the effect of Cr content on microstructure and mechanical properties of the weld joints were investigated. The results show that, with Cr content increasing, grain size of heat-affected zone with coarse grain increases, inhomogeneous microstructure is observed in fusion zone, and hardened phases tend to be present in the weld joint. With Cr content increasing, hardness of the weld joint increases and its impact toughness decreases, especially when Cr content is up to 5 wt%. The weld joints with proper hardness and higher toughness can be obtained when the Cr content of low alloy corrosion resistant pipeline steel is no more than 3 wt%.

引用

页码：92 / 96