charging trays, Pusher skid roller trays, fan wheels used in heat treatment furnaces
Surface quenching and tempering heat treatment
Surface quenching and tempering heat treatment usually adopt induction heating or flame heating. The main technical parameters are surface hardness, partial hardness and effective hardening layer depth. Hardness test can adopt vickers hardness tester, rockwell or surface rockwell hardness tester. The choice of test force (scale) is associated with effective hardening layer depth and hardness of metal parts surface. Here involves three kinds of hardness testers.Firstly, vickers hardness tester is an important means of testing hardness of surface of heat treatment metal parts, it can choose test force in 0.5-100 kg and test surface hardening layer in 0.05 mm for the thinnest thickness.The precision is the highest, which can distinguish the tiny difference of hardness of surface of heat treatment metal parts. In addition, the effective hardening layer depth is tested by vickers hardness tester, therefore, equipped with a vickers hardness tester is necessary for using surface heat treatment metal parts.