2013•Rejiagong gongyiRequires access

Influences of Quenching and Tempering on Microstructure and Hardness of W6Mo5Cr4V2Si High Speed Steel

Jiadong Li

Abstract

The heat treatment process of W6Mo5Cr4V2Si high-speed steel was tested in conditions of different quenching and tempering temperatures,then,material microstructure and hardness were analysized.The results show that the hardness of W6Mo5Cr4V2Si steel is little when quenching temperature is below 1200 ℃ and at tempering 600 ℃.The tempering hardness of W6Mo5Cr4V2Si steel under the conditions of 1250 ℃ quenching temperature decreases with the increase of tempering temperature.The highest hardness of W6Mo5Cr4V2Si steel is 67.1 HRC around when the material is treated by 1250 ℃quenching and 560 ℃tempering.And the microstructure of W6Mo5Cr4V2Si steel is mainly made up of mesh or half mesh carbides,granular carbides and tempered martensite.

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Key concepts: Tempering, Quenching (fluorescence), Materials science, Microstructure, Martensite, Metallurgy, Carbide, High-speed steel