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author:

常雨曦 (常雨曦.) [1]

Abstract:

采用CO_2气体保护焊工艺和ER50-6焊丝焊接Q390A钢,并对其进行焊接接头腐蚀疲劳性能测试。通过分析S-N曲线及疲劳断口SEM可知,腐蚀时间的增加会降低焊接接头疲劳极限值,60天加速腐蚀下焊接接头腐蚀坑面积和深度均较大;在承载相同动态应力下,加速腐蚀时间越长、断口裂纹越多,裂纹方向越趋于多样化,腐蚀疲劳裂纹形成速度越快;高腐蚀介质浓度和低pH值也会使腐蚀疲劳强度降低,但在相同测试时间中pH值对疲劳程度影响较小。

Keyword:

CO_2气体保护焊 Q390A钢 性能测试 焊接接头 腐蚀疲劳 金属材料

Community:

  • [ 1 ] 福州大学至诚学院

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Source :

焊接技术

ISSN: 1002-025X

CN: 12-1070/TG

Year: 2023

Issue: 07

Volume: 52

Page: 13-17,129

Cited Count:

WoS CC Cited Count:

SCOPUS Cited Count:

ESI Highly Cited Papers on the List: 0 Unfold All

WanFang Cited Count:

Chinese Cited Count:

30 Days PV: 4

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