We developed a new type of hard alloy which was prepared by sintering of the powder mixture of pure W, TiB2, and ternary complex boride Mo2NiB2 powders with composition of W(bal.)-10vol%Mo₂NiB₂-(0-13)vol%TiB₂ under the pressure of 0.98MPa Ar gass at 1973K for 1.8ks. Mechanical properties such as hardness, fracture toughness, transverse rupture strength, thermal shock resistance and sliding wear resistance were in-vestigated on this hard alloy. Moreover, corrosion resistance of the hard alloy in a molten Al alloy (JIS ADC10) at 1023K was examined.
The result indicate that the hard alloy has better sliding wear resistance against FCD45 than SKD61 and excellent corrosion resistance in the molten Al alloy. We expect that the hard alloy will be used as many machine parts for aluminium diecasting.