中碳低合金高强钢转变组织对其耐磨性能的影响Effect of transformation microstructure on wear resistance of medium carbon low alloy high strength steel
李秉宸,安胜利,成永久,付学义,贾礼,高占勇
摘要(Abstract):
设计了一种中碳低合金马氏体/低温贝氏体复相高强钢,并研究了不同热处理工艺下转变组织对其力学性能和耐磨性能的影响,测试了试验钢不同转变组织在磨粒磨损和冲击磨损条件下的耐磨性能,并使用场发射扫描电镜观察磨损后试验钢表面和亚表层的形貌,以研究其磨损机制。结果表明:二体平面磨损的耐磨性与硬度成正比,三体冲击磨损性能受硬度与冲击韧性的综合影响;等温淬火温度为260℃时,试验钢的组织为回火马氏体/低温贝氏体的复相组织,综合力学性能良好,其耐磨性是马氏体组织耐磨性的1.5倍。等温淬火组织比淬火回火组织耐磨性高的原因在于,具有较高冲击吸收能量的等温淬火组织经冲击磨损后,其表面硬度大约提高12%以上,产生加工硬化现象,接近于马氏体组织硬度。
关键词(KeyWords): 等温淬火;马氏体/低温贝氏体;磨粒磨损;冲击磨损;耐磨机理
基金项目(Foundation): 内蒙古自治区应用技术研究与开发计划项目(201802022);; 包钢钢联股份有限公司技术开发项目;; 鄂尔多斯市科技计划项目
作者(Author): 李秉宸,安胜利,成永久,付学义,贾礼,高占勇
DOI: 10.13289/j.issn.1009-6264.2021-0407
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