肖伯涛,樊自田,蒋文明,刘鑫旺,向军淮

• 1:江西科技师范大学江西省材料表面工程重点实验室
• 2:华中科技大学材料成形与模具技术国家重点实验室

摘要(Abstract)：

采用振动消失模铸造制备了Y形HT100灰铸铁,研究振幅对消失模铸造灰铸铁组织及性能的影响。结果表明:随着振幅增大,灰铸铁中短而薄的A型片状石墨增多,奥氏体组织由柱状晶向胞状晶转变;当振幅为2 mm时,珠光体中的片状渗碳体发生粗化、片间距变大,即珠光体中的碳化物由片状向粒状转变;灰铸铁的硬度、抗拉强度和伸长率均随振幅增大先增大后减小;当振幅为3 mm时,灰铸铁硬度最大,而在振幅为2 mm时,灰铸铁的抗拉强度和伸长率最高,其最高数值分别为160 HBW、147. 51 MPa和1. 17%;灰铸铁性能的改变主要由灰铸铁中奥氏体形态、分布,以及A型片状石墨所决定。

关键词(KeyWords)： 灰铸铁;消失模铸造;振幅;力学性能

Abstract:

Keywords:

基金项目(Foundation): 国家高技术研究发展计划(863计划)资助项目(2007AA03Z113)

作者(Author): 肖伯涛,樊自田,蒋文明,刘鑫旺,向军淮

DOI: 10.13289/j.issn.1009-6264.2019-0229

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