In order to shorten the nitriding time and ensure that the steel type is not restricted, two nitriding processes have been developed based on the original nitriding process, namely soft nitriding and ion nitriding.
Soft nitriding is essentially low-temperature nitrocarburzing based on nitriding. While nitrogen atoms of the steel penetrate, a small amount of carbon atoms also penetrate. Compared with general gas nitriding, the treatment results are that the hardness of the nitrided layer is higher than that of nitrogen. It has low brittleness, so it is sauc soft nitriding.
Soft nitriding methods are divided into three categories: gas soft nitriding, liquid soft nitriding and solid soft nitriding. At present, gas soft nitriding is widely used in domestic production. Gas soft nitriding is a low-temperature nitrogen and carbon co-penetrating process in an atmosphere containing active nitrogen and carbon atoms. Commonly used co-penetrating media include urea, formamide, ammonia and triethanolamine, which undergo thermal decomposition at the soft nitriding temperature. Reaction produces active nitrogen and carbon atoms. Active nitrogen and carbon atoms are absorbed by the surface of the workpiece and penetrate into the surface of the workpiece through diffusion, thereby obtaining a nitrocarburizing layer mainly composed of nitrogen. The gas soft nitriding temperature is usually 560-570 degree , because the hardness of the nitrided layer is the highest at this temperature. The nitriding time is usually 2-3 hours, because if it exceeds 2.5 hours, the depth of the nitriding layer will increase very slowly as time goes by.
In papildinājums, the raksturīgais of the soft nitriding technology of the nitriding furnace is that after the steel performes the soft nitriding treatment, a thin white bright layer will be production.
