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激光燃烧合成掺杂钨精矿FeAl复合材料组织及性能

, PP. 138-142

Keywords: 激光,燃烧合成,钨精矿粉,微观组织,力学性能

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Abstract:

通过对掺杂不同含量钨精矿粉末Fe-Al系粉末压坯进行激光点燃自蔓延烧结(SHS),利用XRD、SEM、硬度测试、磨损测试表征手段,分析研究了钨精矿粉含量对烧结合金微观组织结构及宏观性能的影响。实验结果表明:在烧结过程中,压坯实现了自蔓延燃烧。合金组织为针状组织,且随着钨精矿粉含量的增加,针状组织长大。产物物相主要为AlFe、AlFe3、WO3以及Fe7W6。当钨精矿粉添加量为1%时,烧结合金显微硬度最大,达到HK956,烧结合金的密度最大,为4.27g/cm3,孔隙率最小,为12.2%,烧结合金的相对磨损率最低,达到0.05%。

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