Cracking Reason Analysis of SWRCH22A Self-tapping Screws
The chemical composition and comprehensive performance of raw materials for hexagon flange self-tapping screws-SWRCH 22A steel was measured,and microstructure of fracture self-screws was studied by SEM and OM.The results show that the screw breakage is due to quenching crack from improper heat treatment.The effective improvement measures to solve the problem of screw breakage are provided.