摘要
为获得高性能Fe／Al合金复合材料，用激光引燃自蔓延高温合成技术掺杂0～5．0％钨精矿粉末制备了Fe／A1合金，采用XRD、SEM、孔隙率、硬度、耐磨性等表征和测试手段，分析了钨精矿粉含量对烧结合金微观组织结构及性能的影响。结果显示：随钨精矿粉含量增加，Fe／Al合金试样中生成的Fe7W6明显增多，氧化物硬化相WO，含量降低，Fe／Al合金试样的烧结密度先增大后减小，孔隙率先降低后升高，致密性先显著提高后下降。当钨精矿含量为1．0％时，生成了WO3、Fe7W6等物相，烧结合金内呈现出大量针状组织，烧结合金的烧结密度最大，为4．2765g／cm3，孔隙率最小，为12．2％，烧结合金显微硬度最高，为956HK，合金耐磨性最好，磨损率为0．05mg／mm2。
Fe/Al alloy with0~5.0%tungsten concentrate powder was prepared by laser ignition induced self- propagating high- temperature synthesis(SHS).The characterization and testing methods such as XRD,SEM as well as porosity,hardness and wear resistance tests were used to study the influences of tungsten concentrate powder contents on the microstructure and properties of sintered alloy.The results showed that with the increase of tungsten concentrate powder content,the Fe_7 W_6 phases in Fe/Al alloy dramatically increased.Moreover,porosity first reduced and then ascended,and the compactness first significantly increased and then decreased.When the tungsten concentrate powder content was1.0%,the WO_3 and Fe_7 W_6 phases were formed,and a large number of acicular structure appeared in sintered alloy,which had the maximum sintered density up to 4.276 5 g/cm^3,the minimum porosity down to 12.2%,the maximum microhardness up to 956 HK and the optimum wearability with the wear rate of0.05 mg/mm^2.
出处
《材料保护》
CAS
CSCD
北大核心
2016年第3期1-3,22,共4页
Materials Protection
关键词
Fe/Al烧结合金
钨精矿粉
激光自蔓延烧结
显微组织
性能
Fe/Al sintered alloy
tungsten concentrate powder
laser ignition induced SHS
microstructure
property
