... heating before forging,wir ultrahigh frequency induction heating machine:frequency:100-500KHZ Application: machine parts quenching, depth of quenching less than 1 ... metalwelding, cemented carbide thermal spraying and so on. Type of machine:XC-08,XC-16,XC-40,XC-70 Example : 1 ... depth of quenching 1-1.2mm deflection little. 2. machine tool guideways dovetail groove quenching 3.Φ3mm drill bit heating 4.Φ3 ...