Study on Microstructure and Properties of Heat-resistant and Wear-resistant Steel
The microstructure and mechanical properties of heat-resistant and wear-resistant cast steel with different composition were studied under the same heat treatment condition by series of experiments. The results show that, under the experimental conditions, the as-cast microstructure of two kinds of heat-resistant and wear-resistant cast steels is composed of martensite and the ministry of pearlite. After the quenching and tempering, their microstructure is the tempered martensite and continuous network, the distribution of herringbone carbide alloy. The testing results also show that the hardness of two kinds of experimental steels, before and after the heat treatment achieves 51.8 HRC, 43.7 HRC and 58.3 HRC, 58.4 HRC,respectively. The impact toughness of two kinds of heat-resistant and wear-resistant cast steels after heat treatment achieves 2.6 J/cm2 and 4.1 J/cm2, respectively.