合成铸铁熔炼工艺及增碳剂吸收率影响因素

介绍了合成铸铁熔炼过程中的增C原理及增C剂粒度、增C剂加入量、温度、铁液搅拌、铁液化学成分对增C剂吸收率的影响。说明了感应电炉熔炼合成铸铁的配料比、加料顺序和炉内加入增C剂、炉外增C的方法。经过增C剂增C处理后的铸铁,石墨形态基本为A型石墨,抗拉强度比非合成铸铁高15～30MPa,硬度提高10HB左右,铸件本体硬度更加均匀。

Melting Process of Synthetic Cast Iron and Factors Influencing Absorptivity of Carburizer

An introduction was given to the principle of recarburation during melting process of synthetic cast iron,as well as the influence of carburizer grain size,recarburizer adding amount,temperature,iron melt stirring and iron melt composition on the absorptivity of carburizer. The charge mixture ratio,charging sequence of induction furnace melted synthetic cast irons and the methods of adding carburizer in furnace and outside furnace was described. After having been carburized with carburizer,the graphite morphology of the cast irons was basically of full A-type,tensile strength was higher than nonsynthetic cast irons by 15～30 MPa,hardness increased by about 10 HB,and the hardness distribution of the casting body was more uniform.