Laser Combining Of Ni-Al Alloy And The Influence Doped B And Tungsten Concentrates Power

A experiment was launched for nice Ni-Al alloy. The Ni₆₅Al₃₅and Ni₇₅Al₂₅power werepressed in a molds. The compacts were synthesized by different powers of laser. B powder andtungsten concentrates powder were appended to improve the performance of Ni-Al alloy. Themicrostructure characterization and performance were tested by OM、XRD、TEM、EDS、SEM.The sintered alloy is investigated by study on hardness testing, wearing resistance etc. It is showsthat the Ni₆₅Al₃₅and Ni₇₅Al₂₅alloy is mainly made up Ni3Al、NiAl. Microcosmic shape of thesintered Ni₆₅Al₃₅is acicular crystal.And the the sintered Ni₇₅Al₂₅is meshy. Hardness andcorrosion of Ni₆₅Al₃₅is better than Ni₇₅Al₂₅.After append B powder and tungsten concentratespowder, the alloy have a increase in density, hardness, wearing resistance and have a littleimpact in corrosion resistance.