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电子束局部热处理是一种重要的改性方法。采用电子束局部热处理技术对H13钢模具进行了热处理,并测试与分析了模具耐磨损性能和热疲劳性能。结果表明:随加速电压从40 kV增加至70 kV或束流从30 mA增加至45 mA,模具的耐磨损性能和热疲劳性能均先提高后下降。H13钢模具电子束局部热处理的加速电压优选为55 kV、束流优选为42 mA。与40 kV加速电压相比,采用55 kV加速电压的电子束局部热处理H13钢模具的磨损体积减小62%、热疲劳裂纹级别从8级变为2级;与30 mA束流相比,采用42 mA束流的电子束局部热处理H13钢模具的磨损体积减小63%,热疲劳裂纹级别从7级变为2级。
E-beam local heat treatment is an important modification method. H13 steel molds were heat-treated by electron beam local heat treatment, and their wear resistance and thermal fatigue properties were tested and analyzed. The results show that with the increase of accelerating voltage from 40 kV to 70 kV or the increase of beam current from 30 mA to 45 mA, the wear resistance and thermal fatigue properties of the mold firstly increase and then decrease. The acceleration voltage of H13 steel mold electron beam local heat treatment is preferably 55 kV and the beam current is preferably 42 mA. Compared with 40 kV accelerating voltage, the wear volume of H13 steel with electron-beam local heat treatment with 55 kV accelerating voltage is reduced by 62%, and the thermal fatigue crack level is changed from 8 grades to 2 grades. Compared with 30 mA beam, Electron Beam Local Heat Treatment at 42 mA Beam The wear volume of the H13 steel die is reduced by 63% and the thermal fatigue crack level is changed from 7th grade to 2th grade.