徐畅,朱华明,严红革,陈吉华,夏伟军,苏斌

• 1:湖南大学材料科学与工程学院
• 2:广州众富技术有限公司

摘要(Abstract)：

对GCr15钢和Nb+V微合金化GCr15钢(GCr15-0.07Nb-0.13V)进行了正火、球化退火和淬火-回火处理，探索了Nb+V微合金化对GCr15钢在3种热处理条件下的力学性能的影响，分析了微合金化对淬回火态GCr15钢摩擦磨损行为的影响机制。结果表明：Nb+V微合金化能够细化GCr15钢的晶粒，提高其硬度和抗拉强度，在淬回火条件下平均晶粒尺寸从3.21μm细化到了2.90μm,硬度和抗拉强度分别提高了57.5 HV和137.9 MPa,这主要归因于Nb+V微合金化后马氏体含碳量较高以及纳米(Nb, V)C相的沉淀强化作用；Nb+V微合金化提高了GCr15轴承钢的耐磨性能，淬回火态GCr15-0.07Nb-0.13V钢的平均摩擦系数和磨损率分别为0.3921和0.81×10~(-5)mm~3·N~(-1)·m~(-1),与GCr15钢相比分别降低了8.8%和56.9%,其原因是Nb+V微合金化对晶粒和碳化物的细化以及起到的固溶强化和沉淀强化的作用。

关键词(KeyWords)： GCr15轴承钢;Nb+V微合金化;热处理;力学性能;摩擦磨损

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 徐畅,朱华明,严红革,陈吉华,夏伟军,苏斌

DOI: 10.13289/j.issn.1009-6264.2025-0069

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