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为了探讨碳在铁素体氮碳共修中的作用，采用相同温度和时间进行铁素体氮碳共渗和短时渗氮试验。然后进行金相观察和显微硬度测定、耐磨试验、弯曲试验和扭转试验。试验结果与传统的观点相反。铁素体氮碳共渗的一系列优点并非是碳和氮的同时渗入而是由于形成厚度恰当的化合物层。碳并未表现出“加速渗氮”作用，反而明显降低渗层韧性。对于中碳以上的碳钢和合金钢，在渗氮的同时渗入碳并未进一步提高渗层硬度和耐磨性，因此，除了低碳钢经铁素体氮碳共渗后提高化合物层耐磨性外，短时渗氮可广泛替代铁素体氮碳共渗工艺，从根本上解决铁素体氮碳共渗的环境污染。
In order to investigate the role of carbon in the co-cultivation of ferrite and nitrogen, ferritic nitrocarburizing and short-time nitriding tests were carried out at the same temperature and time. Then metallographic observation and microhardness test, wear test, bending test and torsion test. The test result is contrary to the traditional view. A series of advantages of ferritic nitrocarburizing are not simultaneous infiltration of carbon and nitrogen but due to the formation of the appropriate thickness of the compound layer. Carbon did not show the “accelerated nitriding” effect, but significantly reduce the toughness of the infiltration layer. For medium carbon and carbon steel and alloy steel, infiltration of carbon while nitriding did not further improve the hardness and wear resistance of the infiltration layer, therefore, in addition to low carbon steel after ferritic nitrocarburizing to improve the compound layer wear In addition, short-time nitriding can replace ferritic nitrocarburizing process extensively, fundamentally solving the environmental pollution caused by ferrite nitrocarburizing.