艾云龙,龙青,陈卫华,谢耀辉,何文

• 1:南昌航空大学材料科学与工程学院

摘要(Abstract)：

研究了分级保温热处理对高铬白口铸铁组织转变、硬度、冲击韧性及耐磨性的影响。结果表明:高铬白口铸铁分级保温处理中,基体中过饱和的碳和合金元素会以二次碳化物的形式析出,残留奥氏体发生马氏体转变。在1150℃×2 h+890℃×5 h分级保温过程中,随着保温时间的延长有大量二次碳化物析出,首先析出颗粒状的(Cr,Fe)23C6,然后基体和(Cr,Fe)23C6发生原位转变生成片状的(Cr,V)2C和长条状的(Cr,Fe)7C3,有效地提高了合金的硬度、冲击韧性及抗磨损能力。

关键词(KeyWords)： 高铬白口铸铁;热处理;硬度;冲击韧性;耐磨性;二次碳化物

Abstract:

Keywords:

基金项目(Foundation): 江西省教育厅科技项目(GJJ11498);; 南昌市科技支撑计划项目(2010-95)

作者(Author): 艾云龙,龙青,陈卫华,谢耀辉,何文

DOI: 10.13289/j.issn.1009-6264.2014.07.021

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