Microstructure and mechanical properties of low-carbon martensite steel under different processes

The effects of the quenching temperature and holding time on the microstructure, tensile strength and yield strength of the low-carbon martensite steel were investigated. The research results showed that the quenching temperature and holding time had an obvious influence on the microstructure and mechanical properties of the samples. The microstructures of the samples quenched at 890 °C for 70 s and 210 s mainly consisted of lath martensite and massive ferrite. The whole lath martensite microstructure was observed while quenched at 920 °C and 950 °C holding for 210 s. The sample quenched at 920 °C holding for 70~210 s had good mechanical properties.