Wear Resistance of Nano TiN Strengthen High Chromium Cast Iron

摘要

The effects and the mechanisms of namo TiN on the high chromium cast iron are studied, the material has been prepared through infiltration casting and addition of high carbon ferrochrome powder and nano TiN powder. The alloy is formed on the surfaced of guide plate, and the wear resistance of alloy have been studied by means of SEM, XRD micro-analysis and wear-resistant performance. The grain size and the type of carbide in the organization are affected by nano TiN, and the wear resistance of carbon chromium alloy layer is affected by the type of carbide; when the addition of nano TiN is 1%(wt), the grain size is apparently refined, over-eutectic primary M_7C_3 inthe hypereutectic is precipitated uniformly in considerable amounts, therefore the wear resistance of alloy can be improved effectively.