本文叙述了用回收制氧站排空的氮气进行轴承钢淬火加热的试验室试验和控制气氛淬火炉中间试验;介绍了客车轴承零件的氮基气氛加热所用设备、加热工艺、经济性和质量。结果表明,未经净化的制氧机排空氮气可直接用于客车轴承的氮基气氛加热,取代吸热型控制气氛,产品质量符合要求,并节约了能源。 This paper describes the laboratory test of quenching the bearing steel with nitrogen evacuated from the oxygen station and the pilot test of the control atmosphere quenching furnace. The equipment, heating process, economy and quality of nitrogen bearing atmosphere heating for passenger car bearing components are introduced. The results showed that purifying nitrogen without purifying oxygen could be directly used for nitrogen-based atmosphere heating of passenger car bearings, replacing the endothermic control atmosphere, product quality meets the requirements and energy saving.