韩文政,麻衡,李振伟,王中学,王家荣,满成,崔洪芝

• 1:中国海洋大学材料科学与工程学院
• 2:山东钢铁股份有限公司

摘要(Abstract)：

首先利用Gleeble 3800热模拟机获得了高强度低合金NM500耐磨钢在不同冷却速率下的静态CCT曲线，随后研究了不同温度奥氏体化保温不同时间后淬火及低温回火对其显微组织、力学性能及耐磨性能的影响。结果表明：随着冷却速率的增大(0.1～120℃/s),NM500耐磨钢先后发生珠光体、铁素体、贝氏体和马氏体转变，当冷却速率大于30℃/s时，只发生马氏体转变，其组织全为马氏体；当保温时间为10 min时，随着奥氏体化温度升高，回火后实验钢的硬度和-40℃冲击吸收能量呈逐步上升趋势；当保温时间为20和30 min时，随着奥氏体化温度升高，回火后的硬度呈先升高后下降的趋势，-40℃冲击吸收能量呈逐渐下降的趋势；当奥氏体化温度为880℃时，随着保温时间的延长，实验钢的磨损率与磨损体积均逐渐降低，耐磨性能逐渐增强；当奥氏体化温度为900和920℃时，随着保温时间的延长，实验钢的耐磨性能逐渐下降；经880℃保温30 min水淬及220℃回火30 min后，NM500耐磨钢的组织为细小的回火马氏体组织，具有较好的强韧性匹配以及良好的综合力学性能，其硬度、-40℃冲击吸收能量、磨损体积和磨损率分别为503 HV0.2、38.6 J、0.2952×10~6μm~3和0.5467×10~(-6) mm~3/(N·m)。

关键词(KeyWords)： NM500耐磨钢;冷却速率;淬火+回火;耐磨性

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金重点项目(52331004,U2106216);; 山东省自然科学基金(ZR2022ZD12,ZR2024ZD14)

作者(Author): 韩文政,麻衡,李振伟,王中学,王家荣,满成,崔洪芝

DOI: 10.13289/j.issn.1009-6264.2025-0326

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