Microstructure And Properties Of Fe-Al Composite Material Blended With Tungsten Concentrate Powder Prepared By Laser Ignition Induced SHS

In this paper, Fe-Al alloy blended with tungsten concentrate powder was successfulprepared by laser ignition induced SHS with different sintering power. The reinforcing phase ofthe Fe-Al compound material is WO3. By means of the SEM, sintering density and porosity test,EDS, XRD, hardness test, abrasion test and corrosion resistance test, the effect of the content oftungsten concentrate powder, aluminum and the technological parameters on the sintered alloymicrostructure and macroscopic properties was studied by author.The experimental results show that the best composition admeasurement is Fe40Al60blendedwith1wt%tungsten concentrate powder. The best technological parameters is that the sinteringpower is1100W¹100W, the sintering time is about20s, the beam diameter is15mm. Thestructures of the sintered alloy appear strip, with the increase of the sintering power, theorganizational structure is even and smooth. The product phase of the sintering alloy areAlCrFe₂、AlFe、FeAl₃、Al₈₆Fe₁₄、Al₅Fe₂、WO₃. When the sintering power is1100W, the densityof the sintering alloy is the biggest, which is4.47g/cm3,while the porosity is the lowest, which is0.04%; the micro hardness of the sintering alloy is the biggest, which is1309.7HK; When thesintering power is1000W, the relative wear rate of the sintering alloy is the lowest, which is0.06mg/mm2respectively. The corrosion resistance which in the0.5mol/L H₂SO₄is the best andthe passivation current density and the induced blunt current density are the lowest, which are0.37mA/cm²and79.8mA/cm².