采用宏观观察、化学成分分析、扫描电镜和能谱分析、金相检验等方法对金属软管断裂原因进行分析,结果表明:环境中的腐蚀性介质渗入到金属软管内层,内层在腐蚀性介质与外力的共同作用下发生了沿晶应力腐蚀开裂,导致金属编织网断裂和波纹管减薄,最终在外力的作用下软管发生断裂。

The reasons for the fracture of the metal hose were analyzed by means of macroscopic observation, chemical composition analysis, scanning electron microscopy and energy spectrum analysis, metallographic examination. The results show that the corrosive medium in the environment infiltrated into the inner layer of the metal hose. Under the combined action of corrosive medium and external force, intergranular stress corrosion cracking occurred in the inner layer, resulting in the fracture of the metal woven mesh and the thinning of the bellows, and finally fracture occured under the action of external force.