... treatment of steel bars Main feature 1.light weight, small size and simple structure2.simple to operate, a few minutes is enough ... speed is less than one second, and heating speed can be adjusted.5.different shape and size of induction coil can be changed ... the high-frequency welding.3, metal quenching, annealing, quenching, tempering and heat treatment.4, metal forging, hot forming.5, powder metallurgy ...