尤景田,黎志英,王劼,黄胜,曾泽芸,黎世旺,杨光凯,李长荣

• 1:贵州大学材料与冶金学院
• 2:贵州省冶金工程与过程节能重点实验室
• 3:首钢水城钢铁(集团)有限责任公司

摘要(Abstract)：

分析了HRB500E微合金化高强度钢筋中钒的氮化物、碳化物和碳氮化物分别在液相、凝固过程、奥氏体以及铁素体相中的析出热力学条件，并研究了它们在实验钢连铸或热处理过程中的析出规律。结果表明：实验钢中，钒的碳化物和氮化物在钢液中不析出。碳氮化钒(VC_xN_(1-x))中的x值随温度降低而增大，即在高温平衡条件下析出富氮的碳氮化物，在全固溶温度1450 K下析出物为VC_(0.03)N_(0.97)。VN在1176～1448 K温度区间内在奥氏体相中析出，温度低于1176 K时，主要析出物为碳化钒或碳氮化钒。实验钢铁素体相中也观察到有钒的化合物析出，呈椭圆形，析出规律与热力学分析结果基本吻合。

关键词(KeyWords)： 高强度钢筋;热力学;碳化钒;氮化钒;碳氮化钒

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52074095);; 贵州省科技厅科技支撑项目[2022]053

作者(Author): 尤景田,黎志英,王劼,黄胜,曾泽芸,黎世旺,杨光凯,李长荣

DOI: 10.13289/j.issn.1009-6264.2022-0391

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