赵丕鹏,王晶,沈正军,黄宝旭,马杰,赵性川,王长征

• 1:聊城大学材料科学与工程学院
• 2:海军飞行学院

摘要(Abstract)：

利用中频感应熔炼炉制备了球墨铸铁,采用X-ray衍射仪、光学显微镜、场发射扫描电镜和电子万能试验机分别研究了配分时间对球墨铸铁的微观结构、组织形貌和力学性能的影响。结果表明:淬火无配分的球墨铸铁由马氏体和残留奥氏体组成。随着配分时间的增加,奥氏体发生回火转变和等温淬火转变两个过程。配分时间较短时,球墨铸铁的奥氏体含量增加,在配分时间为10 min时达到最大值。配分时间进一步增加,奥氏体由于分解为下贝氏体和碳化物含量逐渐降低。同时球墨铸铁的抗拉强度和伸长率随着配分时间的增加也发生非单调的变化。配分时间为120 min时,抗拉强度达到最大值,约为1503 MPa;伸长率在配分时间为60 min时达到最大值,约为2.61%。

关键词(KeyWords)： 球墨铸铁;淬火-配分;配分时间;抗拉强度

Abstract:

Keywords:

基金项目(Foundation): 山东省自然基金(ZR2012EMM007);; 山东省科技发展计划项目(2014GGX102016)

作者(Author): 赵丕鹏,王晶,沈正军,黄宝旭,马杰,赵性川,王长征

DOI: 10.13289/j.issn.1009-6264.2016-X155

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