苑振涛,蒋业华,冯晶

• 1:昆明理工大学材料科学与工程学院
• 2:昆明理工大学城市学院

摘要(Abstract)：

采用Thermo-Calc热力学软件计算不同Cr含量Fe-xCr-yB含硼高速钢的Fe-B伪二元垂直截面图。采用OM、SEM、EDS和XRD等研究观察了Fe-xCr-yB(x=1.0%、3.0%、5.0%、7%;y=0.5%、1.0%、1.5%、2.0%、2.5%、3.0%)合金钢的铸态微观组织和物相组成,并通过硬度测试和冲击韧性试验研究了Cr和B含量对含硼高速钢的相图、凝固组织及力学性能的影响。结果表明:随着Cr含量的增加,共晶反应温度升高,共晶点的B含量降低,但共晶反应产物未发生变化,铸态含硼高速钢的硬度和冲击韧性增加;B含量的增加,促进了M3(B,C)和M23C6硬质相的生成,有利于高速钢硬度的提高,但冲击韧性值有所降低。

关键词(KeyWords)： 高速钢;相图计算;微观组织;力学性能;铸态

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51261013)

作者(Author): 苑振涛,蒋业华,冯晶

DOI: 10.13289/j.issn.1009-6264.2017-0311

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