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在被广泛用于机械金属零件表面改性的渗碳处理中,真空渗碳由于能缩短处理时间和降低运行成本而受到重视。真空渗碳是在真空加热炉内加入碳氢化合物系的渗碳气体,使它在钢表面热分解时产生的碳原子渗入钢中并扩散而进行渗碳处理的一种表面改性方法,但迄今所用的渗碳气体主要是乙炔、乙烯等高价的不饱和碳氢化合物。为降低成本开发了直接用天然气(城市煤气13A)作为渗碳气体的技术。
In carburizing, which is widely used for the surface modification of mechanical metal parts, vacuum carburization has drawn attention due to its shortening of processing time and reduction of running costs. Vacuum carburizing is a surface modification method in which a carburizing gas of hydrocarbon system is added in a vacuum heating furnace so that carbon atoms generated during the thermal decomposition of the steel surface permeate the steel and diffuse to carburize the carburizing gas, The carburizing gases used so far are mainly acetylene, ethylene and other expensive unsaturated hydrocarbons. In order to reduce the cost of direct use of natural gas (city gas 13A) as a carburizing gas technology.