电焊机2018，Vol.48Issue(1)：101-105,5.DOI:10.7512/j.issn.1001-2303.2018.01.23
保护气体对06Cr19Ni10钢焊接接头疲劳性能的影响
Effect of different protective atmospheres on fatigue performance of 06Cr19Ni10 stainless steel welded joints
宗桓旭 1许鸿吉 1耿涛 1祁艺洋1
作者信息
- 1. 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 commonly applied in MAG welding,the amount of their addition has definite influence on the fatigue performance of austenitic stainless steel.Through pulsating tensile fatigue test and metallographic structure analysis,the fatigue performance of MAG welding butt joint of 06Cr1gNi10 steel with two different kinds of protective atmospheres is studied.The results show that the median fatigue strength of ψ(Ar)95％+ψ(CO2)5％ is 300 MPa,the median fatigue strength of ψ(Ar)97％+ψ(O2)3％ is 302.5 MPa.The fracture locationof specimen mainly concentrates in the heat affected zone.The crack starter location is obvious in the crack initiation zone;the fatigue striations on the extending zone are clear;the final broken zone is the toughness dimple type of fracture;the matrixes of the microstructures of two types of welded joints are both austenitic,and there are δ ferrites distribute on the matrix.关键词
06Cr19Ni10不锈钢/MAG焊接头/金相组织/疲劳性能Key words
06Cr19Ni10 stainless steel/MAG welded joint/microstructure/fatigue performance分类
矿业与冶金引用本文复制引用
宗桓旭,许鸿吉,耿涛,祁艺洋..保护气体对06Cr19Ni10钢焊接接头疲劳性能的影响[J].电焊机,2018,48(1):101-105,5.
