通过宏观、微观观察、金相分析和化学成分检测等对铜阀在使用中出现的多条裂纹件进行分析。结果表明:铜阀开裂属多源沿晶脆性断裂,为应力腐蚀所致。由于铜阀材质为应力腐蚀敏感性较高的黄铜ZHPb59-1,加之受到加工残余拉应力和安装应力的共同作用,在潮湿环境中短期会发生应力腐蚀开裂。 Through the macroscopic and microscopic observation, the metallographic analysis and the chemical composition testing, the cracking of the copper valve in use was analyzed. The results show that the copper valve cracking is a multi-source along the crystal brittle fracture, due to stress corrosion. As the copper valve material for the high sensitivity of stress corrosion brass ZHPb59-1, coupled with processing by the residual tensile stress and the combined effect of installation stress, short-term stress corrosion cracking occurs in humid environments.