grey-tin
1.Iron matrix graphite composite was prepared by mixing different proportion of grey iron wafer and graphite(1%,2%,3% and 4%),compacting and sintering. The best graphite content is 2% though the analysis on the microstructure,hardness and wear resistance. The feasibility and developing prospect of the application of the material on colliery vertical shaft tin guiding bush are discussed.
2.Two kinds of cermets (cermet A and B) and their cutters (Tool A and B), were sintered by TiC micronpowders with TiN nanoparticles and TiC0. 7 N0.3 solution nanopowders under pressureless conditioa The study of microstructures and cutting tests showed that ceramic phases of A had black cores surrounded by grey rims, while B exhibited black and white cores with grey rims.
