Microstructure and properties of Fe-Al alloy blended with tungsten concentrate powder prepared by laser ignition induced SHS

When the mass fraction of the tungsten concentrate powder is 1%, changing the atom fraction of Al with 50%, 60%, 70%, 80%, Fe-Al alloy was prepared by laser ignition induced SHS. By means of the XRD, SEM, hardness test and abrasion test, the effect of the content of Al on the microstructure and macroscopic properties of the sintering alloy was studied. The results show that through the sintering process, the self-propagating combustion synthesis of the blank is achieved. The product phases of the sintering alloy are AlFe, AlFe₃, WO₃, AlCrFe₂ and with the increase of the content of Al, the Al-rich phases are formed.The structures of the sintering alloy appear small crackle, which grow up with the increase of the content of Al. When the atom fraction of the aluminum is 60%, the micro hardness of the sintering alloy is the biggest, which is HK1053,and the relative wear rate of the sintering alloy is the lowest, which is 0.04 mg穖m^-2.