氮化工艺在模具表面强韧化方面的应用已很久,然而,氮化工艺本身还存在着许多不足之处。针对现行氮化工艺存在的问题,上海华通开关厂工模具车间经过多年的研究实践,搞出了一项新的氮化工艺——真空氮化。 真空氮化是用真空泵把炉内空气抽到10mmHg柱压力以下,然后开始升温,当加热到300℃时通入干燥氨气,炉内气体压力保持在某一真空范围内循环,抽气以脉冲方式进行,达到规定温度后保持一定时间,随后降温到450℃时停止通氨,利用真空泵使炉 Nitride process in the mold surface toughening has been a long time, however, there are still many shortcomings nitriding process itself. In response to the existing problems of nitriding process, Shanghai Huatong switch factory workers mold workshop after years of research and practice, come up with a new nitriding process - vacuum nitriding. Vacuum nitriding is the use of a vacuum pump to the furnace air pumped to 10mmHg column pressure below, and then began to heat up when heated to 300 ℃ dry ammonia gas, the furnace gas pressure is maintained within a certain vacuum cycle, pumping in pulses Way to reach the required temperature for a certain period of time, then cooled to 450 ℃ stop ammonia, the use of vacuum pump to furnace