铸造2011，Vol.60Issue(12)：1180-1184,5.
冷却速度对高铬铸铁热处理过程中组织转变的影响
Effect of Cooling Rate on Structural Transformation of High Chromium Cast Iron During Heat Treatment
陈闪闪 1赵爱民 1李振 1唐获1
作者信息
- 1. 北京科技大学冶金工程研究院,北京100083
- 折叠
摘要
Abstract
The study was carried out to investigate the effects of cooling rate on structural transformation of high chromium cast iron during the cooling process of heat treatment. The microstructure of high chromium cast iron was researched. The results show that the microstructure is typical hypoeutectic white cast iron at lower cooling rates, which consists of structure transformed by primary austenite at lower temperature and eutectic; at cooling rate of 3 °C/s, martensite begins to appear, and a large number of martensites are formed preferentially in the eutectic austenite; the amount of martensite increases gradually with the increase of cooling rate, and its microstructure is composed of continuous martensite and eutectic carbides at cooling rate of 10 °C/s. A large number of secondary carbides precipitate in the primary austenite region, while no one in the eutectic austenite region. With the increasing of cooling rate, the interlamellar spacing of pearlite located in the primary austenite region and eutectic austenite region decreases gradually.关键词
高铬铸铁/冷却速度/显微组织/二次碳化物/珠光体片层间距Key words
high chromium cast iron/ cooling rate/ microstructure/ secondary carbides/ interlamellar spacing of pearlite分类
矿业与冶金引用本文复制引用
陈闪闪,赵爱民,李振,唐获..冷却速度对高铬铸铁热处理过程中组织转变的影响[J].铸造,2011,60(12):1180-1184,5.
