断线钳钳头开裂分析

Fracture Analysis on Wire Clipper Jaw

对已开裂断线钳钳头的显微组织、化学成分和硬度进行了检测和分析。结果表明 ,开裂原因是由于高频淬火前粗大的显微组织和淬火时淬硬层过深 。

The microstructure, chemical composition and hardness of cracked jaws of wire clippers were detected and analyzed. The result shows that the coarse-grain microstructure before high frequency quenching and over-deep hardened case during hardening lead to too high tensile stress and cause the samples cracked.