王磊,路昊青,张宝燕,刘杨,宋秀,李永胜

• 1:东北大学材料各向异性与织构教育部重点实验室
• 2:山东天瑞重工有限公司

摘要(Abstract)：

针对大尺寸液压破碎锤活塞用9CrV钢,研究分析了热处理工艺对其显微组织及力学性能的影响。结果表明,经840℃淬火和300℃回火后,9CrV钢的组织为回火马氏体、粒状碳化物和残留奥氏体,其硬度为56.7 HRC,冲击吸收能量为4.66 J。随淬火温度降低至800℃,回火温度提高至400℃,9CrV钢的硬度降低至49.8 HRC,降幅近12.2%,而冲击吸收能量提高至8.98 J,增幅达92.7%。这是由于降低淬火温度后未溶碳化物数量增多,一方面细化了组织,另一方面形成淬火后马氏体的含碳量降低,两者均为提高淬火组织的强韧性提供了基础。适当提高回火温度,组织由回火马氏体转变为回火屈氏体。通过淬火与回火工艺的综合调控,可有效提高9CrV钢的抗冲击能力。

关键词(KeyWords)： 9CrV钢;热处理调控;显微组织;冲击吸收能量;硬度

Abstract:

Keywords:

基金项目(Foundation): 泰山领军人才(战略性新兴产业创新类)计划项目(tscy20170318)

作者(Author): 王磊,路昊青,张宝燕,刘杨,宋秀,李永胜

DOI: 10.13289/j.issn.1009-6264.2021-0234

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