Inner hole induction quenching precautions

Precautions for high-frequency quenching of inner holes: During scanning heating, the inner diameter surface of the workpiece should form an eddy current in real time with the movement of the coil, so as to quickly heat the surface to above the austenite transformation temperature.

1) The gap between the workpiece and the coil should be appropriate to avoid the phenomenon of rubbing between the coil and the workpiece;

2) There is a problem with the inductor. The three turns of coils should be wrapped with insulating tape respectively, and then finally wrapped with insulating tape as a whole。