轴、杆类构件在镀铬过程中或在存放、使用一段时间后,镀铬表面产生大量的微裂纹。通过外观和断口宏微观、金相组织、硬度、残余应力和氢含量测试等手段,检测出轴、杆镀铬表面微裂纹属于磨削裂纹或氢脆延迟开裂。通过加强轴杆表面镀铬工艺控制,可有效预防该类缺陷的产生和扩展。 Shaft, rod components in the chrome plating process or in storage, after a period of use, chrome plated surfaces produce a large number of micro-cracks. Through the appearance and fracture macro-micro, microstructure, hardness, residual stress and hydrogen content test and other means to detect shaft, rod chrome surface micro-cracks are grinding cracks or delayed cracking of hydrogen embrittlement. By strengthening the surface chrome plating process control, which can effectively prevent the generation and expansion of such defects.