电焊机2017，Vol.47Issue(10)：67-70,4.DOI:10.7512/j.issn.1001-2303.2017.10.14
保护气体对1.4003不锈钢焊接接头组织和疲劳性能的影响
Effect of protective atmosphere on microstructure and fatigue performance of 1.4003 stainless steel welded joints
于岩 1宗桓旭 2鲁二敬 1桂洪利 1张艳辉1
作者信息
- 1. 中国中车唐山机车车辆有限公司,河北唐山063035
- 2. 大连交通大学材料科学与工程学院,辽宁大连116028
- 折叠
摘要
Abstract
The oxygen and carbon dioxide are available active gas and both are applied to MAG,and have different influence on the mechanical properties and microstructure of stainless steel.Through pulsating tensile fatigue test and microstructure analysis,studied that the microstructure and fatigue performance of MAG welding butt joint of 1.4003 steel under two kind of protective atmospheres.The results show that,the microstructure of base metal of two welds are both austenitic,and the δ ferrite are on the matrix;the median fatigue strength of φ(Ar)95％+φ(CO2)5％ is 312.5 MPa,the median fatigue strength of φ(Ar)97％+φ(O2)3％ is 302.5 MPa.The fracture location of specimen is mainly concentrated in the heat affected zone.The crack starter location is obvious on the crack initiation zone,the fatigue beach on the extending zone is vivid,the final broken zone is the toughness fracture of dimple type.关键词
1.4003不锈钢/MAG焊接头/金相组织/疲劳性能Key words
1.4003 stainless steel/MAG welded joint/microstructure/fatigue performance分类
矿业与冶金引用本文复制引用
于岩,宗桓旭,鲁二敬,桂洪利,张艳辉..保护气体对1.4003不锈钢焊接接头组织和疲劳性能的影响[J].电焊机,2017,47(10):67-70,4.
