Surface Hardening of Adjusting Screw Tip

By surface hardening experiment on the top of adjusting screw,the structure of rectangle induction coil and induction heating parameters for abtaining a certain depth of hardened layer on the surface of adjusting screw′s cylinder and global side at the same time.The mechanism of forming bowl hardened layer on the top of adjusting screw was illustrated.The special function of induction current was put forward during heating.Thus the theory of induction heating was enriched and the application range of induction heating was expanded.