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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%。
By means of laser ignition self-propagating sintering (SHS) of Fe-Al powders with different content of tungsten concentrate powder, XRD, SEM, hardness test and wear test were used to characterize the effect of tungsten powder content on sintering Effect of Microstructure and Macro Properties of Alloy. The experimental results show that self-propagating combustion is realized in the compact during the sintering process. The microstructure of the alloy is acicular tissue, and acicular tissue grows with the increase of the content of tungsten concentrate. The product phase is mainly AlFe, AlFe3, WO3 and Fe7W6. When the content of tungsten concentrate powder is 1%, the microhardness of the sintered alloy is the largest, reaching HK956, the density of the sintered alloy is the largest, 4.27g / cm3, the porosity is the smallest, 12.2%, the relative wear rate of the sintered alloy is the lowest, Reached 0.05%.