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.
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