中文摘要：

以Fe_（50-x/2）Al_（50-x/2）Cr_x（x=4,8,12,16）体系粉末为基体,掺杂1%（质量分数）的钨精矿粉末,压制成坯。利用激光引燃自蔓延烧结制备原位自生颗粒增强复合材料。采用OLYMPUS4000、XRD等微观组织结构表征手段及合金硬度、磨损性能等宏观力学性能及腐蚀性能测试方法,研究不同Cr粉含量对烧结合金组织及性能的影响。结果表明：烧结合金物相主要为Fe_3Al,Al_2O_3,AlCrFe_2,Cr_2O_3及硬质颗粒相W。当Cr含量为8%时,烧结合金内部针状组织细小致密,物相有较好的分散性;磨损率相对较低,为0.38 mg/mm-2。当Cr含量为12%时,烧结合金硬度最高,为11 450 MPa;自腐蚀电位最大,为327.643 mV;腐蚀电流密度最小,为1.044 m A·cm-（-2）,腐蚀速率最低。

英文摘要：

In situ tungsten particle reinforced Fe-Al-Cr composites were synthesized by laser induced sintering using Fe_（50-x/2）Al_（50-x/2）Cr_x（x=4, 8, 12, 16）＋1wt%W concentrate. By OLYMPUS4000, XRD, hardness test, abrasion test and corrosion resistance, the influence of different Cr contents on microstructure and properties of the sintered alloy was investigated. The results show that the sintered alloys are mainly consisted of Fe_3 Al, Al_2O_3, AlCrFe_2, Cr_2O_3 and W phases. The needle-like microstructure is fine and well dispersed, while the abrasion rate is the lowest, about 0.38 mg·mm（-2）, when Cr content is 8%. The hardness and correction resistance of the alloy is the best, when the content of Cr is 12%. The value of hardness, corrosion potential and passivation current density is 11 450 MPa（HV）, 327.643 m V and 1.044 m A·cm（-2）, respectively.