工程科学学报2015，Vol.37Issue(12)：1564-1569,6.DOI:10.13374/j.issn2095-9389.2015.12.005
稀土处理C-Mn钢显微组织和夹杂物演化
Microstructure and inclusion evolution in rare earth treated C--Mn steel
摘要
Abstract
The microstructure and inclusions in rare earth treated C-Mn steel were studied, the size distribution of the nuclei in-ducing acicular ferrite nucleation was subjected to statistical analysis, and the formation and growth processes of rare earth inclusions were discussed through quenching the treated samples at different temperatures. It is found that after a small amount of rare earth is added into the C-Mn steel, the inclusion composition changes from MnS ﹢ aluminosilicate to La2 O2 S ﹢ LaAlO3 ﹢ MnS ﹢ alumino-silicates, the inclusion size decreases, and the microstructure converts from martensite ﹢ bainite to ferrite side plate ﹢ acicular ferrite﹢ massive ferrite. The size of effective inclusions inducing acicular ferrite nucleation is mainly concentrated in 1-4μm in the rare earth treated C-Mn steel, they primarily form in liquid steel, but little in the cooling and solidification processes. The rare earth inclu-sions are easy to coalesce and grow up at molten temperature and in the cooling and solidification processes, and MnS can precipitate around the residual rare earth inclusion particles.关键词
碳锰钢/稀土添加/显微组织/夹杂物/针状铁素体/氧化物冶金Key words
carbon manganese steel/rare earth addition/microstructure/inclusions/acicular ferrite/oxide metallurgy分类
矿业与冶金引用本文复制引用
宋明明,宋波,杨占兵,张圣华,宋高阳,胡春林..稀土处理C-Mn钢显微组织和夹杂物演化[J].工程科学学报,2015,37(12):1564-1569,6.基金项目
国家自然科学基金资助项目(51274269) （51274269）
中央高校基本科研业务费资助项目(FRF-SD-12-010A) （FRF-SD-12-010A）
