2015•Rejiagong gongyiRequires access

Influence of Heat Treatment on Microstructures and Hardness of 25CrMo4 Steel

MA Yan-fe

Abstract

Using optical microscope and hardness test method, the influence of tempering and quenching temperatures on the microstructures and hardness of 25 Cr Mo4 steel was studied. The results show that, when quenched at 850~950 ℃, the hardness and microstructure of the steel is no obvious change observed; when tempering temperatures between 600~700 ℃,tempering temperatures has a sever influence on steel hardness. Therefore, the tempering temperatures should be between620 and 660 ℃.

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Key concepts: Tempering, Microstructure, Materials science, Metallurgy, Quenching (fluorescence), Vickers hardness test, Optical microscope, Indentation hardness