Induction Hardening Saw Blades
Induction Hardening Saw Blades With High Frequency Heater
Objective Utilizing induction heating to draw back steel saw blades to aย Rockwell hardness of between 50 and 52. The hardnessย should be within 1/2 to 1 point between the teeth and the backย of the blade. Processing must be performed at a rate of 60ย inches per minute
Material Steel band saw blade measuring 2.125″ wide, 0.042″ thick
Temperature 700 ยบF
Frequency 100ย kHz
Equipment DW-UHF-10kW output solid-state induction power supplyย with a step down transformer and a remote heat stationย containing three (3) busses and eight (8) capacitors with a totalย capacitance of 0.66F. A water-cooled coil was designed andย developed specifically for this application utilizing single and
double turns
Process :The Ameritherm equipment was used to achieve the followingย goals:
ยท The necessary heat pattern was accomplished through theย use of a uniquely designed channel coil and a step downย transformer to reduce the voltage
ยท A feed rate of 60 inches per minute was also met throughย the use of the unique channel coil and specifically designedย fixture.
Results Resulting: mean hardness of 50.3 Rc was measured for fifteenย saw teeth on a Wilson Superficial Hardness Tester, fulfilling theย ultimate goal established by the customer.
