鞠江,符寒光,程美洁,符定梅,雷永平

• 1:北京工业大学材料科学与工程学院
• 2:中冶建筑研究总院有限公司

摘要(Abstract)：

用真空感应炉熔炼含0-8.0%Al的Fe-12Cr-1.5B-Al合金。采用光学显微镜、扫描电镜、XRD、洛氏、维氏硬度计,研究了铝含量对Fe-12Cr-1.5B-Al合金凝固组织和硬度的变化规律。结果表明:无铝Fe-Cr-B合金凝固组织由基体和硬质相组成。基体主要是马氏体和少量奥氏体组织。硬质相有M2(B,C)、M7(C,B)3和M23(C,B)6。铝的加入使Fe-12Cr-1.5B-Al合金基体转变为珠光体和铁素体组织,而对硬质相类型无明显影响。当铝含量超过6.0%时,部分铝元素与铁结合形成铁铝金属间化合物。Cr元素主要存在于硬质相中,基体中也含有一定量的Cr元素。Al元素主要存在于基体和铁铝金属间化合物中。B元素主要存在于M2(B,C)相中。无铝Fe-Cr-B合金洛氏硬度达到61.1 HRC,随着铝含量的增加,Fe-12Cr-1.5B-Al合金的洛氏硬度以及维氏硬度呈现先急剧下降后缓慢升高的趋势。

关键词(KeyWords)： 铝合金化;Fe-12Cr-1.5B-Al合金;凝固组织;硬度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51274016);; 北京市自然科学基金(2142009)

作者(Author): 鞠江,符寒光,程美洁,符定梅,雷永平

DOI: 10.13289/j.issn.1009-6264.2016.09.024

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