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1080℃.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-typed W6Mo5Cr4V8In high vanadium high speed steel used for numerical control machine were heat treated at various temperatures to test and analyze the microstructure,impact property and wear resistance.The results show that with heat treatment temperature increasing from 1 050 ℃ to 1 150 ℃ the grain size of the steel first decreases then increases,and both the impact property and wear resistance of the steel first enhance then decline.M2C carbide is decomposed when the heat treatment temperature is between 1 080 ℃ and 1 150 ℃.The optimized heat treatment temperature is 1 080 ℃.Compared with those of the steel heat treated at 1 150 ℃,the impact absorption energy and wear volume of the steel with heat treatment at 1 080 ℃ increases by 46％ and decreases by 48％,respectively.
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