本规范涵盖了通过气体工艺，自动控制以保持决定氮碳共渗表面性能的渗氮和渗碳电位设定值，从而产生具有可控孔隙率的连续白色层的要求。自动控制旨在确保白层氮和碳含量的可重复性，这会影响耐磨性、耐腐蚀性、延展性和疲劳强度等性能。

This specification covers the requirements for producing a continuous white layer with controlled extent of porosity by means of a gaseous process, automatically controlled to maintain set values of the nitriding and carburizing potentials that determine properties of the nitrocarburized surface. Automatic control is intended to ensure repeatability of nitrogen and carbon content of the white layer which influences properties such as wear and corrosion resistance, ductility and fatigue strength.