2011•Research on Iron and SteelRequires access
Effects of heat treatment on microstructure and properties of wear-resistant steel K400
Wu Di
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Abstract
According to the property requirement to low-alloy wear-resistant steels,the effects of heat treatment process on microstructures and properties of Sumihard-K400 from Sumitomo Metal were analyzed,and heat treatment process parameters were determined to obtain a higher hardness and adequate toughness.The results indicate that the lath martensite microstructure of experimental steel after quenching and tempering is similar with the original K400.The hardness and grain size increase with increasing quenching temperature.The embrittling temperature range is from 300 ℃ to 400 ℃.After quenching at 950 ℃ and tempering at 250 ℃,the experimental steels have good properties that the hardness is 459 HV and the toughness is 80 J.