轨道车辆用不锈钢等离子-MAG复合焊接头疲劳试验

田洪雷; 刘龙玺; 孙维光; 姚宇新; 朱平; 史春元

重点关注 | 浏览量 : 0 下载量: 83 CSCD: 2

导出
分享
收藏
专辑

轨道车辆用不锈钢等离子-MAG复合焊接头疲劳试验
Fatigue test of plasma-MAG hybrid welded joint of stainless steel for railway vehicle
2018年48卷第1期页码：9-14
DOI：

扫描看全文

田洪雷, 刘龙玺, 孙维光, 等. 轨道车辆用不锈钢等离子-MAG复合焊接头疲劳试验[J]. 电焊机, 2018,48(1):9-14.

TIAN Honglei, LIU Longxi, SUN Weiguang, et al. Fatigue test of plasma-MAG hybrid welded joint of stainless steel for railway vehicle[J]. 2018,48(1):9-14.
田洪雷, 刘龙玺, 孙维光, 等. 轨道车辆用不锈钢等离子-MAG复合焊接头疲劳试验[J]. 电焊机, 2018,48(1):9-14. DOI：

TIAN Honglei, LIU Longxi, SUN Weiguang, et al. Fatigue test of plasma-MAG hybrid welded joint of stainless steel for railway vehicle[J]. 2018,48(1):9-14. DOI：

摘要

在选用ER308LSi焊丝和φ（Ar）98%+φ（CO,2,）2%保护气体的条件下,分别采用等离子-MAG复合焊接方法和普通MAG焊接方法焊接轨道车辆用中等厚度SUS301L-MT不锈钢板,并对等离子-MAG复合焊和MAG焊的对接接头和十字接头进行脉动拉伸疲劳试验和疲劳强度估算。结果表明:等离子-MAG复合焊对接接头和十字接头在循环寿命为2×10,6,条件下的中值疲劳强度分别为279 MPa和160 MPa;与普通MAG焊相比,等离子-MAG复合焊接头的疲劳强度均有所提高,其中对接接头疲劳强度的增幅高于十字接头。

Abstract

Plasma-MAG hybrid welding method and ordinary MAG welding method were used respectively to carry out the welding tests of SUS301L-MT stainless steel middle heavy plates for railway vehicles under the condition of ER308 LSi welding wire and φ（Ar）98%+φ（CO2）2% shield gas selected. The pulsating tensile fatigue test and the fatigue strength estimation were conducted on the butt welded joints and the cruciform joints of plasma-MAG hybrid welding and ordinary MAG welding respectively. The results indicate that the median fatigue strength in fatigue life of 2×106cycle is 279 MPa and 160 MPa for the butt joint and the cruciform joint of plasma-MAG hybrid welding respectively. Compared with ordinary MAG welding, the fatigue strength of plasma-MAG hybrid welded joints increases, in which the fatigue strength of butt joint is higher than that of cruciform joint.