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异种金属焊接构件腐蚀疲劳性能研究

Hao Xuelong,Lu Lu,Zhang Donghui,Wu Lei

Heavy Casting and Forging（2022）

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Abstract
选用SUS304不锈钢材料,采用MAG(135)焊接方法将其与低合金钢Q345B进行焊接,结合腐蚀疲劳环境加载装置研究了焊接件的腐蚀疲劳性能,并对断口进行电镜观察.研究发现腐蚀疲劳裂纹扩展源于表面腐蚀缺陷,且断口的腐蚀疲劳裂纹扩展区域、条带特征明显,为典型的腐蚀疲劳断裂.
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Key words
dissimilar metals welding,SUS304 stainless steel,Q345B,corrosion fatigue
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