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采用不同的始锻温度、终锻温度和锻比,对含锶数控机床钻头进行了锻压试验,并进行了表面硬度、高温耐磨损性能和高温冲击性能的测试与分析。结果表明,随着始锻温度、终锻温度、锻比的增加,钻头的表面硬度、高温磨损体积和高温冲击吸收功均先增大后减小。钻头的优化工艺为始锻温度1180℃、终锻温度950℃、锻比6。此工艺下,钻头的表面硬度达78 HRC,600℃磨损体积低至21×10~(-3)mm~3,600℃冲击吸收功高达58 J。
Different forging forging temperature, final forging temperature and forging ratio were used to carry out forging tests on the drill bits containing strontium numerically controlled machine tools. The surface hardness, high temperature wear resistance and high temperature impact properties were tested and analyzed. The results show that with the increase of initial forging temperature, final forging temperature and forging ratio, the surface hardness, the high temperature wear volume and the high temperature impact absorption work first increase and then decrease. The optimum process of the drill bit is forging temperature 1180 ℃, final forging temperature 950 ℃, forging ratio 6. Under this process, the surface hardness of the drill bit reaches 78 HRC, the wear volume at 600 ℃ is as low as 21 × 10 -3 mm -3, and the impact absorption power at 600 ℃ is as high as 58%.