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为了克服气体渗碳炉的固有缺点,研发了一种高性能气体渗碳炉(N-BBH)。通过在密封的加热室里面使用少量载气体并精确控制渗碳过程中的气氛,该渗碳炉可以减少90%以上的CO2排放量。开炉时空气不会进入加热室和前室,因此不需要额外的调节时间。由于有高的碳传递系数(β)和高的碳势(Cp),渗碳速度比低压渗碳的渗碳速度更高。与常规气体渗碳相比,通过减少如CO2、O2和H2O等氧化物含量,并采用氮气或者高碳势气氛,至少可以减少50%的晶界氧化。
In order to overcome the inherent disadvantages of gas carburizing furnaces, a high performance gas carburizing furnace (N-BBH) has been developed. The carburizing furnace can reduce CO2 emissions by more than 90% by using a small amount of carrier gas in a sealed heating chamber and precisely controlling the atmosphere during carburization. Air does not enter the heating chamber and the front chamber when it is turned on, so no additional conditioning time is required. Due to the high carbon transfer coefficient (β) and high carbon potential (Cp), the carburization rate is higher than the carburization rate of low pressure carburizing. By reducing the oxide content such as CO2, O2 and H2O, and using nitrogen or high-carbon atmosphere, the grain boundary oxidation can be reduced by at least 50% compared with conventional carburizing.