Pressureless infiltration fabricated steel matrix composites reinforced with WC by the local electromagnetism induction heating

摘要

A pressure-less infiltration technique was introduced to fabricate WC particles reinforced steel matrix composites through rapidly melting matrix by local electromagnetism induction heating. The four specimens were attained by adjusting the moving speed of sand mould and comparatively investigated. The results showed that the thickness of composite layer was about 4.0 mm. While the moving speed of sand mould was 3.0 cm/min, the reinforced particles had the better homogeneous distribution into the matrix and the metallurgical bonding with the matrix. The wear amount of composites firstly decreased up to a lower value and then increased. Except the sample produced under the speed 1.0 cm/min, the wear-resistant behavior of other three samples were superior to that of high chromium cast iron.