工程科学学报2017，Vol.39Issue(8)：1174-1181,8.DOI:10.13374/j.issn2095-9389.2017.08.006
基于原位观察的H13钢中液析碳化物高温行为研究
In-situ research of high-temperature behavior of primary carbide in H13 steel
摘要
Abstract
In-situ research was conducted to illuminate the high-temperature behavior of primary carbide in H13 steel that had been cast in different ways. Experimental observations indicate the obvious segregation of Cr, Mo, V, and C in the interdendrite zone of continuously cast and electroslag remelting (ESR) samples. In the interdendrite zone, primary carbide is composed of Cr, Mo, V, and Ti. A liquid phase was observed to occur around the primary carbide of two as-cast samples cast by continuous casting and ESR processes when heated to 1200 ℃ and 1250 ℃ , respectively. The temperature at which the liquid phase appears agrees well with theo-retical calculations. The liquid-phase region expands as the heating temperature increases and the continuous casting sample shows a larger liquid zone. The emergence of a partial liquid phase accelerates the diffusion of the segregated elements and is an important fac-tor in the high-temperature behavior of primary carbide.关键词
液析碳化物/显微偏析/原位观察/局部液相Key words
primary carbide/microsegregation/in-situ observation/partial liquid phase分类
矿业与冶金引用本文复制引用
毛明涛,郭汉杰,孙晓林,王飞,陈希春,郭靖..基于原位观察的H13钢中液析碳化物高温行为研究[J].工程科学学报,2017,39(8):1174-1181,8.基金项目
国家自然科学基金资助项目(51541402,51274031) （51541402,51274031）
