摘要
借助微处理机系统控制大功率感应脉冲发生器及检测振荡管阳/栅流动态变化值,系列功率密度条件下,对铁磁性材料和顺磁性材料实施脉冲加热试验。从电磁相互作用理论、热传导及物理冶金学理论出发,分别对感应脉冲加热物理过程和热透层深度与电、热参数之间的关系进行了深入的研究。根据涡流集中区物理性态,作者提出了铁磁材料感应加热周期内划分铁磁态、铁磁性向顺磁性转化态及顺磁态三个阶段的理论模型。由振荡管反射电阻与被加热材料物理性能参量之间的关系发现,产生三个阶段的根本压因是铁磁材料的自发磁感应强度和电阻率温度系数的热温特性,并在热传导理论分析和数据处理结果基础上建立了热透层(淬硬层)深度与感应加热电热参数之间的关系式。
A micro-computer system can perform the controlling of a high frequencygenerator, the sampling, displaying and printing of the instanteneous value ofthe electrothermal parameters of heating processes. pulse hardening experimentsof ferromagnetic and paramagnetic materials have been carried out with a highpower density.The physical process of the induction heating and the relationshipof hardened depth versus the electrothermal parameters have been fully studied,based on electromagnetic interaction theories, heat transfer theorits and thephysical metallurgy.
关键词
感应淬火
表面硬化
脉冲加热
微机
induction hardening
surface hardening
pulse heating
