Effect of Sub-Temperature Quenching Temperature on Microstructure and Property of 35CrMo Steel

Abstract:

Influence of sub-temperature quenching temperature on the tensile strength, hardness and toughness of 35CrMo steel was studied. The microstructure characteristics of this steel after sub-temperature quenching were analyzed. The results showed in the range of 780~810°C the strength and hardness of the 35CrMo steel sub-temperature quenched increased with quenching temperature increasing, reached the highest strength and hardness at 800°C quenching and then began to decrease, while its elongation decreased with the quenching temperature increasing. The duplex microstructure of martensite and ferrite was obtained by sub-temperature quenching of 35CrMo steel. With the quenching temperature increasing, the ferrite content decreased and the distribution of ferrite morphology was changed. A small amount of strip ferrite existed in lath martensite lamellar when quenching temperature was 800°C and the impact toughness of 35CrMo steel was better than that of conventional samples 850°C completely quenched.

• Periodical: Advanced Materials Research (Volumes 490-495)
• Pages: 3257-3261
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.490-495.3257
• Online since: March 2012
• Authors: An Ming Li, Meng Juan Hu
• Keywords: 35CrMo Steel, Hardness, Microstructure, Sub-Temperature Quenching, Tensile Strength

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