孙世清

• 1:河北科技大学材料科学与工程学院

摘要(Abstract)：

采用SLX-80深冷处理系统对T15M粉末高速钢进行深冷处理,采用综合物理测试系统的振动样品磁强计选件(PPMS-VSM)测试样品的室温磁性和热磁性。结果表明:T15M钢在843 K×1 h的回火过程中,在保温和降温阶段出现残留奥氏体向马氏体的转变。在300～10 K之间深冷处理过程中,降温时在110～10 K温度段磁性随温度下降而下降,升温时在40～230 K温度段磁性随温度上升而上升,分别对应于马氏体中碳化物的析出和残留奥氏体向马氏体的转变。深冷处理提前了残留奥氏体向马氏体的转变,抑制了残留奥氏体中碳化物的析出,促进了马氏体中细小碳化物的析出。在第1次回火前或后增加1次深冷处理,可使第3次回火后钢的硬度分别提高2.0 HRC和1.4 HRC。

关键词(KeyWords)： 粉末高速钢;深冷处理;热磁性;硬度;碳化物

Abstract:

Keywords:

基金项目(Foundation):

作者(Author): 孙世清

DOI: 10.13289/j.issn.1009-6264.2013.01.017

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