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高碳钢脱碳倾向大,脱碳后经精加工仍达不到技术要求而报废的零件和工模具是不少的。为了减少切削加工工时及节约钢材,我厂曾对脱碳后的工件进行补充微量碳氮共渗试验,实践表明,T7、T8、T10钢锻冲压模脱碳后进行微量碳氮共渗,具有良好效果,不仅补救了脱碳,而且还提高了抗疲劳性和耐磨性,延长了使用寿命。一付 T7钢50×55×225mm 的标牌钢印模,热处理时严重脱碳,硬度不够,无法修整,被判报废。为了挽救这付急待生产使用的模具,进行了微量碳氮共渗。装箱方法见
High carbon steel decarburization tendency, decarburization after finishing still can not meet the technical requirements and scrap parts and tooling is a lot. In order to reduce the cutting working time and save the steel, our factory has added trace carbonitriding test to the decarburized workpiece. The practice shows that T7, T8 and T10 steel forging stamping die after the micro-carbonitriding, with Good results, not only remedy the decarburization, but also improve the fatigue resistance and wear resistance, extending the service life. A pair of T7 steel 50 × 55 × 225mm plate steel stamping die, heat treatment decarburization, hardness is not enough, can not be trimmed, was sentenced to scrapped. In order to save the molds that are urgently needed for production, a trace amount of carbonitriding was carried out. See the packing method