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通过对开裂铜管宏观形貌及裂纹走向、断口的分析;以及对金相组织及化学成分进行了测试分析,特别是对铜制品存在残余应力进行了综合分析表明,导致铜管短期开裂的机理主要是由腐蚀介质和残余内应力引起,属应力腐蚀开裂所致。
Through the macro-morphology of the cracked copper tube and fracture trend analysis, as well as the microstructure and chemical composition of the test analysis, in particular the residual stress of copper products conducted a comprehensive analysis shows that lead to copper short-term cracking mechanism Mainly caused by the corrosive medium and residual stress, which is caused by stress corrosion cracking.