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兰州农具厂生产的“东风——12型”手扶拖拉机,它的变速箱的齿轮是采用18CrMn Ti低合金钢加工成形后,进行渗碳处理。使用井式气体渗碳炉进行渗碳,这在国内已是一种普及的渗碳方法。但是,由于采用煤油作为渗碳剂,一旦操作不当就会产生大量碳黑,延长生产周期,质量得不到保证。在开门办学过程中,我们就原渗碳工艺进行了分析和研究,并参考兄弟厂先进经验,对煤油气体渗碳工艺进行了一些实验和改进,初
Lanzhou farm tools factory production “Dongfeng - 12” walking tractor, gearbox gear is 18CrMn Ti low alloy steel forming, carburizing. The use of pit-type gas carburizing carburizing furnace, which is already a popular carburizing method in China. However, due to the use of kerosene as a carburizing agent, large quantities of carbon black can be produced in the event of improper handling, prolonging the production cycle, and the quality can not be guaranteed. In the process of open door, we conducted the analysis and research on the original carburizing process, and with reference to the advanced experience of brother factory, some experiments and improvements were made on the carburizing process of kerosene and gas.