Specification :

1, workpiece through hot, such as: high strength bolt, nut, auto parts, hardware tools, rigging, the hot upsetting of hot-rolled twist drill and so on, The longer of the workpiece¡¯s frequency.The deeper of the quenching layer.the lower of the frequency. diameter, the lower of the frequency .
2, heat treatment, shaft, gear, quenching and annealing stainless steel products and put quenching as an example, The shallower of the quenching layer.the higher of the
frequency.The deeper of the quenching layer.the lower of the frequency.