The macrostructure and microstructure of cracked cast copper alloy tap valve were obseverd by SEM and OM,and the chemical composition and hardness were analyzed.

• 通过扫描电镜和金相检验方法观察铸铜水龙头阀体裂纹宏观及微观形貌,检测其化学成分、硬度等,探讨水龙头阀体开裂原因。