摘要
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。
To discuss the effect of carbon in ferrite nitro-carburizing,we engaged in lests of mitro- carburizing and short-term nitriding at the same temperature and time,carried on tests of metallograph observation. microhardness,wear,bend and twisting. The results were contrary to the trabitional viewpoint:a series of abvantages of ferrite nitrocarburizing are not the results from the seeping of carbon and nitrogen at the same time, but from appropriate control of compound layer's depth.Carbon doesn't have an effect on accelerating nitriding,but lowers the layer's toughness.In medium-carbon,high-carbon and alloy steel,the seeping of carbon in the process of nitriding doesn't raise the layer's hardness and wear behaviour furtherly.So except to raise compound layer's wear behaviour in lowcarbon steel,the short-term nitriding can be widely used to replace ferrite nitro-carburizing to solve the environmental problem of nitro-carburizing basically.
出处
《热加工工艺》
CSCD
北大核心
1996年第2期13-16,共4页
Hot Working Technology
关键词
铁素体氮碳共渗
短时渗氮
环境
ferrite nitro-carburizing
short-term nitriding
environment
