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采用不同温度对用于数控机床的W6Mo5Cr4V8In新型高钒高速钢进行热处理,并进行显微组织、冲击性能和耐磨损性能的测试与分析。结果表明,随热处理温度从1 050℃提高至1 150℃,高钒高速钢的晶粒先细化后粗化,冲击性能和耐磨损性能均先提高后下降。热处理温度升高至1 080~1 150℃时,M2C型碳化物发生分解。热处理温度优选为1 080℃。与1 150℃热处理相比,热处理温度为1 080℃时高钒高速钢的冲击吸收功增大46%、磨损体积减小48%。
The new W6Mo5Cr4V8In high-vanadium high-speed steel used for CNC machine tools was heat-treated at different temperatures, and the microstructure, impact properties and wear resistance were tested and analyzed. The results show that with the increase of heat treatment temperature from 1 050 ℃ to 1 150 ℃, the grains of high vanadium high speed steel are refined first and then roughened, the impact and wear resistance firstly increase and then decrease. When the heat treatment temperature is raised to 1 080-1 150 ℃, the M2C carbides decompose. The heat treatment temperature is preferably 1 080 ° C. Compared with the heat treatment at 1 150 ℃, the impact absorption energy of high vanadium high speed steel increases 46% and the wear volume decreases 48% when the heat treatment temperature is 1 080 ℃.