TIN is a general-purpose PVD coating with high cost-performance ratio and stability, enhancing tool hardness and offering high oxidation temperature. This coating, when used on high-speed steel cutting tools or forming tools, yields excellent processing results. The iron nitride coating and its sintered bodies exhibit a pleasing golden yellow color, making them suitable as substitute decorative materials with good gold-like effects, decorative value, and corrosion resistance, extending the lifespan of the工艺品.