韩思莹,赵广迪,于镇铭,杜磊,王茜雯心,于江铖,王楚今,周艳文

• 1:辽宁科技大学材料与冶金学院

摘要(Abstract)：

Fe-Cr-B-C合金是一种低成本的高硼铁基耐磨合金，具有广阔的应用前景。研究了超高温淬火对一种成分优化的(B含量为0.51 mass%)Fe-Cr-B-C合金显微组织、硬度、冲击韧性和耐磨性能的影响。结果表明：当淬火温度为1100℃,合金基体内析出大量二次硼碳化物，降低了马氏体的过饱和度，同时形成了细小的新晶粒，原始网状硼碳化物发生局部断网，这导致其洛氏硬度最低，冲击吸收能量较高，耐磨性能最差；随着淬火温度升高至1160℃,不再析出二次硼碳化物，也不再形成新晶粒，硼碳化物的断网现象更加明显，而马氏体过饱和度不断增大，这导致洛氏硬度增大至(63.2±0.8) HRC,耐磨性能提高；当淬火温度继续升高至1190℃时，重新析出了大量[γ+(Fe, Cr)_2(B, C)]共晶组织并形成网状结构，导致洛氏硬度小幅下降，冲击韧性恶化，耐磨性能明显下降；合金的冲击吸收能量随淬火温度的升高先增大后减小，当淬火温度为1130℃时达到最大，为(4.25±0.25) J;综合来看，经1160℃淬火后Fe-Cr-B-C合金获得了良好的强韧性匹配和优异的耐磨性能，可作为其优选淬火温度。

关键词(KeyWords)： Fe-Cr-B-C合金;超高温淬火;硬度;冲击韧性;耐磨性

Abstract:

Keywords:

基金项目(Foundation): 2025年辽宁科技大学大学生创新创业训练计划项目;; 辽宁省教育厅高校基本科研项目-面上项目(JYTMS20230943);; 国家自然科学基金(51904146)

作者(Author): 韩思莹,赵广迪,于镇铭,杜磊,王茜雯心,于江铖,王楚今,周艳文

DOI: 10.13289/j.issn.1009-6264.2025-0054

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