用自制的循环除氧装置对循环法制备无氧化热加工气氛进行研究,制得了以氮气为主的无氧化热加工气氛,并对工业纯铁、45钢和T10钢进行了保护加热试验。结果表明:当系统的压强降低率不大于300 Pa/h,工业纯铁和45钢试样可做到无氧化和脱碳加热,若再采用高温长时间烘炉再加热试样工艺能实现T10钢的完全无氧化无脱碳加热。 The self-made cycle deaerator was used to study the non-oxidative hot working atmosphere prepared by the recirculation method. The nitrogen-free hot working atmosphere was obtained, and the protective heating tests were conducted on the industrial pure iron, 45 steel and T10 steel. The results show that when the pressure drop rate of the system is not more than 300 Pa / h, the industrial pure iron and 45 steel samples can be heated without oxidation and decarburization. If the high temperature and long time oven reheat the sample process, the T10 Complete oxidation-free steel without decarburization heating.