电焊机2018，Vol.48Issue(3)：76-79,4.DOI:10.7512/j.issn.1001-2303.2018.03.13
P355NL1低合金钢焊补后力学性能研究
Research on mechanical properties of P355NL1 low alloy steel after welding repair
孙佳 1董洪达 1倪宝成1
作者信息
- 1. 中车南京浦镇车辆有限公司,江苏南京210031
- 折叠
摘要
Abstract
P355NL1 low alloy steel is a commonly used material for bogie frame.In this paper,the tensile,impact,flexural and fatigue tests of the welded parts of P355NL1 low alloy steel and its repairing part are carried out.The result shows that it's not bad for microstructure of welding repair and the grain size of the retained lower welding layer can be refined.There is no obvious decrease in the welding hardness after single pass welding.The tensile failures of the two parts happened on the base metal,the welding repairs have no effect on the static load strength.Comparing with original welding part,due to the welding of the last remaining welding joints parts played a role in heat treatment,grain refined,improved tissue distribution,the impact toughness and fatigue strength of repairing part is improved.关键词
转向架构架/P355NL1/焊补/力学性能Key words
bogie frame/P355NL1/welding repair/mechanical properties分类
交通工程引用本文复制引用
孙佳,董洪达,倪宝成..P355NL1低合金钢焊补后力学性能研究[J].电焊机,2018,48(3):76-79,4.
