摘要
淬火过程中,控制搅拌的方向和程度可减少钢淬火时的变形、开裂及获得高的硬度和均匀性.理想的情况,是在淬火开始阶段增大淬火烈度以获得高硬度,当钢件温度接近Ms点时,降低淬火烈度以减小工件的变形和开裂倾向.在整个淬火过程中,影响淬火烈度且最易改变的工艺参数是搅拌.如果搅拌速率可根据要求连续变化是最理想的.本文阐述了计算机控制的“控时侵淬系统(ITQS)”原理以及ITQS目前在热处理中的应用.并探讨ITQS就水溶性聚合物淬火剂代油的应用和原理.
Cracking and distortion reduction and maximum and uniform hardness during the quenching of steel can be enhanced by control of the direction and degree of agitation throughout the quenching process. It is generally desirable to increase quench severity during the initial stage of the quench in order to obrain maximum hardness. As the steel core temperature approaches the Ms temperature, it is then desirable to minimize quench severity in order to minimize the potential for cracking and distortion of the part. The only process variable impacting on quench severity that can be readily changed throughout the quench is agitation and it would be most ideal if the agitation rate could be continuously varied ,as required. This is now readily accomplished by the use of a computer controlled ITQS-'immersion time quenching system'. ITQS are currently in use at a number of heat treating companies in Korea. This paper will discuss the principles and application of ITQS to replace oil with aqueous polymer quenchants.
出处
《金属热处理》
EI
CAS
CSCD
北大核心
1995年第11期19-23,42,共6页
Heat Treatment of Metals
