汽车变速器齿轮轴的强韧化热处理

发布时间：2018-06-08 06:05

  本文选题：强韧化热处理 + 变速器齿轮轴　； 参考：《热加工工艺》2017年04期

【摘要】：为了使20CrMnTi汽车变速器齿轮轴强韧化,通过改进正火和淬火工艺,对其热处理工艺、力学性能和耐磨损性能进行了研究。结果表明:与改进前热处理工艺相比,采用改进工艺热处理后的20CrMnTi汽车变速器齿轮轴的25℃抗拉强度、屈服强度和断后伸长率分别提高8.6%、7.8%和30.2%;350℃抗拉强度、屈服强度和断后伸长率分别提高43.0%、64.8%和57.9%;25℃和350℃磨损体积分别减小62.2%、71.2%。优化的20CrMnTi汽车变速器齿轮轴强韧化热处理的正火工艺为:875℃×1.5h+650℃×0.5h后空冷的等温正火处理,优化的淬火工艺为:870℃×3.5h碳氮共渗后先560℃×0.5h分级淬火后油冷。
[Abstract]:In order to strengthen and toughen the gear shaft of 20CrMnTi automobile transmission, the heat treatment process, mechanical properties and wear resistance of 20CrMnTi transmission gear shaft were studied by improving normalizing and quenching technology. The results show that the tensile strength of 20CrMnTi transmission gear shaft after heat treatment is increased by 8.6% and 30.2 鈩，

本文编号：1994845