奥氏体化温度和合金成分对典型磨矿介质相变动力学的影响

Effects of the Austenitizing Temperature and Alloy Composition on Phase Transformation Kinetics of Typical Grinding Media

本文利用J Mat Pro软件对典型磨矿介质ZQCr12高铬铸球的相变动力学行为进行研究,主要分析了奥氏体化温度及合金元素成分含量对铸球等温转变和连续冷却转变的影响。结果表明:ZQCr12高铬铸球适宜的奥氏体化温度为850~1000℃,随着奥氏体化温度的升高和合金成分含量的增加,ZQCr12高铬铸球的TTT和CCT曲线均向右移动,珠光体转变和贝氏体转变被推迟,铸件的淬透性增加,可在更低的冷速范围内获得马氏体组织。

This paper uses J Mat Pro software to study the kinetic behavior of phase transformation of typical grinding media,ZQCr12 high-chromium cast balls,and analyzes the effects of the austenitizing temperature and alloy composition on the isothermal transformation and continuous cooling transformation of the cast balls.The results show that the suitable austenitizing temperature of ZQCr12 high-chromium cast balls is 850-1000℃.With the increase of the austenitizing temperature and alloy composition,the TTT and CCT curves of ZQCr12 high-chromium cast balls are shifted to the right,the pearlite transformation and bainite transformation are delayed,and the hardenability of castings is increased,thus martensite can be obtained in a lower range of cooling rate.