胡宇航,田方铖,高雪云,王海燕,袁晓鸣

• 1:内蒙古科技大学材料科学与工程学院
• 2:内蒙古自治区新金属材料重点实验室
• 3:广东广青金属科技有限公司
• 4:内蒙古包钢联股份有限公司

摘要(Abstract)：

为研究稀土Ce对马氏体耐磨钢高温相变及连续冷却过程的影响，制备了有、无Ce的两组NM400耐磨钢。采用淬火热膨胀仪、扫描电镜、显微硬度仪和X射线衍射仪等分析了Ce对实验钢过冷奥氏体连续冷却转变动力学、高温相变、硬度及显微组织的影响。绘制了实验钢的连续冷却转变(CCT)曲线和原位X射线衍射图谱，对比Ce加入后曲线和衍射图谱的变化。结果表明：微量的Ce对NM400耐磨钢在不同冷速下的组织演变规律影响不大，但是添加Ce使珠光体组织细化并且减小了马氏体板条间距，改善了碳化物析出，细化了实验钢的组织，提高了其硬度；Ce提高了NM400耐磨钢的奥氏体转变温度，使CCT曲线中的奥氏体相区扩大，并且使CCT曲线出现两个新的稳定区域，在升温过程中，Ce减缓了实验钢的奥氏体转变进程，使实验钢在相同温度下的奥氏体转变程度减弱。

关键词(KeyWords)： 马氏体耐磨钢;稀土Ce;原位X射线衍射;连续冷却转变

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(52161008,52361012);; 中央引导地方科技发展资金项目(2022ZY0035);; 内蒙古自治区直属高校基本科研业务费项目(2023RCTD007);; 内蒙古自治区高等学校青年科技英才支持计划资助(NJYT23003);; 阳江市合金材料与五金刀剪重点产业人才振兴计划专项基金(RCZX2022020)

作者(Author): 胡宇航,田方铖,高雪云,王海燕,袁晓鸣

DOI: 10.13289/j.issn.1009-6264.2024-0516

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