梁桃云,朱华明,严红革,陈吉华,夏伟军,苏斌,陶富华,郝凯斌

• 1:湖南大学材料科学与工程学院
• 2:广州众山精密科技有限公司

摘要(Abstract)：

为了提高GCr15钢的硬度和强度,对其进行了Nb+V微合金化和不同工艺的热处理,研究了Nb+V微合金化对GCr15钢的奥氏体及珠光体特征和力学性能的影响。结果表明,添加Nb+V元素能够有效地细化GCr15钢的奥氏体晶粒,其原因是固溶态的Nb和V元素对奥氏体晶界有拖曳作用,且(Nb, V)C碳化物对晶界有钉扎作用。在1050℃保温30 min时,GCr15-0.10Nb-0.13V钢的奥氏体晶粒相比GCr15钢细化了37.41%。Nb+V微合金化能够细化珠光体片层间距,促进棒状和粒状珠光体的形成,进而提高钢的抗拉强度和屈服强度。在1200℃保温120 min空冷后,GCr15-0.10Nb-0.13V钢的抗拉强度和屈服强度相比GCr15钢分别提高了132.6和151.5 MPa,伸长率为10.4%。

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

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 梁桃云,朱华明,严红革,陈吉华,夏伟军,苏斌,陶富华,郝凯斌

DOI: 10.13289/j.issn.1009-6264.2024-0106

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