17-4PH钢螺钉的断裂失效分析及除氢工艺改进

Failure analysis and improvement of hydrogen removal process for 17-4PH steel screw

针对17-4PH不锈钢螺钉在使用过程中发生断裂的情况,对17-4PH钢断裂螺钉进行了宏观、微观组织观察,能谱成分分析以及氢含量比对分析。结合断裂螺钉的断口硬度、强度、显微组织等方面检测结果,分析并确定螺钉断裂主要原因为氢致断裂。优化改进了除氢工艺并应用于生产,效果良好。

In response to the fracture of 17-4PH stainless steel screws during using,macroscopic and microscopic microstructure observation,energy spectrum composition analysis and hydrogen content comparison analysis were conducted on the 17-4PH steel fractured screws.Based on the testing results of the fracture hardness,strength,microstructure and other aspects of the fractured screw,it is analyzed and determined that the main cause of screw failure is hydrogen induced fracture.The hydrogen removal process is optimized,and applied to production with which good results have been obtained.