周宏伟,程和法,韦杰,程文,魏家强

• 1:合肥工业大学材料科学与工程学院
• 2:合肥东凌铸件工业有限公司

摘要(Abstract)：

制备了含硅量达到4.0%以上的高硅铁素体球墨铸铁,采用光学显微镜及电子万能拉伸试验机研究了其显微组织及力学性能,并通过X射线衍射仪(XRD)半宽高法测定了其铁素体基体的晶格常数。结果表明:含硅量为4.0%～4.1%时,高硅铁素体球铁的基体组织为全铁素体,石墨数量多、石墨球细小圆整;球铁的抗拉强度达到608～626 MPa,屈服强度为498～519 MPa,屈强比为0.81%～0.83%,伸长率为18%～21%。硅对球铁中铁素体具有显著的固溶强化作用,使铁素体基体的晶格发生畸变,含硅量为4.0%的球铁中铁素体的晶格常数比含硅量为2.6%时的晶格常数减小0.067%。

关键词(KeyWords)： 铁素体球墨铸铁;力学性能;微观组织;固溶强化

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 周宏伟,程和法,韦杰,程文,魏家强

DOI: 10.13289/j.issn.1009-6264.2020-0487

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