铸造2012，Vol.61Issue(12)：1393-1396,4.
含碳量对过共晶高铬铸铁显微组织与耐磨性的影响
Effects of Carbon Contents on Microstructure and Wear Resistance of the Hypereutectic High Chromium Cast Iron
摘要
Abstract
The effects of carbon contents on microstructure and wear resistance of the 33.5% Cr hypereutectic high chromium cast iron were investigated by optical microscope, quantitative metallographic determination on image analyzer, mechanical properties tester, low-stress wet-abrasive wear.Experimental results show that the mainly microstructure characteristic was hexagon and rod-shaped coarse primary M7C3 carbides.With the increase of carbon content, the primary carbides grew larger, the volume of primary carbides and total volume of carbides became larger, but the impact toughness declined and the wear resistance increased gradually.Under 40 N, 70 N, 100 N loads, the wear resistance of specimens with 4.80% C were improved 26.1%, 24.5%, and 24.1% than that of specimens with 3.86% C.With the increase of load, the wear resistance of high chromium cast irons with the same carbon contents decreased, and the advantage of wear resistance decreased too.Compared with 23% Cr hypereutectic high chromium cast iron, the wear resistance of the 33.5% Cr hypereutectic high chromium cast irons with 3.86% C, 4.13% C, 4.65% C, 4.80% C were improved 42.9%, 52.0%, 54.6% and 56.6%, respectively.关键词
碳/过共晶/高铬铸铁/显微组织/耐磨性Key words
carbon/ hypereutectic/ high chromium cast iron/ microstructure/ wear resistance分类
矿业与冶金引用本文复制引用
杨诚凯,李卫..含碳量对过共晶高铬铸铁显微组织与耐磨性的影响[J].铸造,2012,61(12):1393-1396,4.基金项目
广东省科技计划重大专项(2009A080304010,2010A080407002,2011A080802003) （2009A080304010,2010A080407002,2011A080802003）
中央高校基本科研业务费专项资金(21612105). （21612105）
