一、前言近二十年来, 感应加热的工业应用日益广泛, 除感应熔炼、感应焊接及一些场合的特殊应用三个方面外,着重有感应热处理和棒、管、线、板的整体加热、半固态成形中料坯加热等两个方面,其中在感应热处理中主要有淬火、回火、去应力处理、退火、正火、球化和烧结等。在材料 I. Introduction In the past 20 years, the industrial application of induction heating has become more and more widespread. In addition to induction melting, induction welding and special application in some occasions, there are three aspects: inductive heat treatment, integral heating of rods, tubes, wires and plates, half Solid forming in the blank material heating and other two aspects, of which the induction heat treatment are quenching, tempering, stress treatment, annealing, normalizing, spheroidization and sintering. In the material