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在(Fe-Cr)(40)-Al(60)粉末中掺杂0.5%、1%、3%、5%(质量分数)钨精矿粉末,压制成坯,并对压坯进行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OM、XRD等微观组织结构表征手段及合金密度、孔隙率、硬度、磨损性能等宏观力学性能及腐蚀性能测试方法,研究不同钨精矿粉末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Al Fe,Al Fe3,Al2O3,W,WO3及(Al-Fe)4Cr。烧结合金组织均匀细小,以颗粒状弥散分布于基体中。当钨精矿粉含量为1%时,烧结合金密度最大,为3.969 g/cm3,孔隙率最小,为9.01%;合金硬度最高,为13 210 MPa;磨损率最低,为0.47 mg/mm2;自腐蚀电位最大,为325.790 m V,腐蚀电流密度最小,为182.2μA·mm-2,耐蚀性能最好。
0.5%, 1%, 3% and 5% (mass fraction) tungsten concentrate powders were doped into (Fe-Cr) (40) -Al (60) powders and pressed into billets and the green compact was laser-ignited Self-propagating sintering to prepare in situ particle reinforced composites. The effects of powder content of different tungsten concentrates on the microstructures and properties of sintered alloys were investigated by means of OM, XRD and other microstructural characterization methods and macroscopic mechanical properties such as alloy density, porosity, hardness, wear properties and corrosion testing methods. The results show that the main phases of sintered alloy are Al Fe, Al Fe3, Al2O3, W, WO3 and (Al-Fe) 4Cr. Sintered alloy tissue evenly small, distributed in granular matrix dispersed in the matrix. When the content of tungsten concentrate is 1%, the sintered alloy has the highest density of 3.969 g / cm3 and the lowest porosity of 9.01%. The highest hardness of alloy is 13 210 MPa and the lowest wear rate is 0.47 mg / mm2. The corrosion potential is the largest, which is 325.790 mV. The corrosion current density is the smallest, which is 182.2μA · mm-2. The corrosion resistance is the best.