孙冬,张凌峰,熊毅,任凤章,刘治军,高广东,秦小才

• 1:河南科技大学材料科学与工程学院
• 2:有色金属共性技术河南省协同创新中心
• 3:中原内配集团股份有限公司

摘要(Abstract)：

采用光学显微镜(OM)、扫描电镜(SEM)、拉伸试验、切削力测试等研究了SiBa-SiBa、RE-RE、SiBa-RE、SiBa-SiSr四种孕育剂对灰铸铁微观组织、力学性能以及切削加工性能的影响。结果表明:4组试样的组织主要为珠光体和A型石墨,其中RE-RE、SiBa-RE试样局部分别存有少量E型和D型石墨。对比单一孕育剂,复合孕育剂更能细化珠光体与石墨,其中SiBa-SiSr试样的石墨片最为细小弯曲,珠光体层片间距为0.166μm,抗拉强度与硬度分别为468 MPa和357 HBW;SiBa-SiBa试样的石墨片最为宽大平直,其珠光体层片间距为0.3μm,抗拉强度与硬度分别为423 MPa和275 HBW。在相同切削条件下,SiBa-SiSr试样的硬度涨幅最大,切削力变化量最小。从综合性能上考虑,SiBa-SiSr是灰铸铁的首选孕育剂。

关键词(KeyWords)： 灰铸铁;孕育剂;微观组织;力学性能;切削性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(U1804146,51801054);; 河南省高校科技创新人才支持计划项目(17HASTIT026);; 河南省高等学校重点科研项目(16A430005);; 河南科技大学科技创新团队资助项目(2015XTD006)

作者(Author): 孙冬,张凌峰,熊毅,任凤章,刘治军,高广东,秦小才

DOI: 10.13289/j.issn.1009-6264.2019-0519

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