摘要
采用理论计算方法分析了Nb、Ti碳化物在低C微合金钢(%:0.09C、1.42Mn、0.035Nb、0.012Ti)奥氏体中的溶解与析出,测试了不同加热温度下奥氏体晶粒尺寸以及固溶-时效后实验钢的硬度。结果表明,Nb、Ti碳化物在1060℃全部溶解,800℃时效时,奥氏体中的Nb、Ti基本以NbC、TiC形式析出。700℃时效时,Nb、Ti碳化物在铁素体内析出,随温度降低,碳化物析出减慢。600℃时效,钢的硬度达到最大值。
The dissolution and precipitation of Nb-Ti carbides in austenite of a low carbon microalloying steel （0. 09C, 1.42Mn, 0. 035Nb, 0. 012Ti ） have been analyzed by theoretical calculation method, and the austenite grain size with different heating temperature and the hardness of steel after solid solution treatment -aging were examined. The results showed that Nb-Ti carbide completely dissolved at 1 060 ℃ and almost Nb and Ti in austenite precipitated in the form of NbC and TiC at 800 ℃ aging. At 700 ℃ aging the Nb-Ti carbides precipitated in ferrite, and with decreasing temperature the carbides precipitation decreased. The hardness of steel was up to maximum value as aged at 600 ℃.
出处
《特殊钢》
北大核心
2006年第6期4-6,共3页
Special Steel
关键词
Nb—Ti微合金钢
碳化物
溶解
析出
Nb-Ti Microalloying Steel, Carbide, Dissolution, Precipitation
