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对石墨烯改性模具材料进行了不同退火、淬火和相同回火工艺的热处理,并进行了显微组织、硬度、冲击性能和耐磨损性能的测试与分析。结果表明,分步退火和分步淬火均能细化该材料的组织,提高其硬度、冲击性能和耐磨损性能。与常规退火相比,分步退火使硬度增加24%,冲击韧度增加21%,磨损体积减小41%;与常规淬火相比,分步淬火能使硬度增加17%,冲击韧度增加11%,磨损体积减小20%。退火工艺优选为760℃×1 h+550℃×1 h分步退火,淬火工艺优选为950℃×10 min+900℃×10 min分步淬火。
The graphene modified mold materials were annealed, quenched and the same tempering process of heat treatment, and the microstructure, hardness, impact resistance and wear resistance of the test and analysis. The results show that both the stepwise annealing and the stepwise quenching can refine the microstructure of the material and improve its hardness, impact resistance and wear resistance. Compared with the conventional annealing, the stepwise annealing increased the hardness by 24%, the impact toughness by 21% and the wear volume by 41%. Compared with the conventional quenching, the fractional quenching increased the hardness by 17% and the impact toughness by 11% %, Wear volume reduced by 20%. Annealing process is preferably 760 ℃ × 1 h + 550 ℃ × 1 h step annealing, quenching process is preferably 950 ℃ × 10 min + 900 ℃ × 10 min step quenching.