Application of PVD coating on metal stamping/forming die

If the surface of the stamping/forming die fails, it usually manifests as abrasion, corrosion, cracking, and deformation. In order to effectively prevent the shortening of the service life of the mold, when the mold is processed, the surface of the relative moving part and the surface of the middle cavity must meet the corresponding requirements, and must have high lubricity and hardness, so as to promote its better performance. To reduce wear, improve wear resistance, and achieve better anti-fatigue and anti-corrosion effects. The application of PVD coating treatment technology can promote the effective solution of the above-mentioned problems in the mold. Some researchers have used low-temperature ion carburizing, unbalanced magnetron sputtering Ti/TiN and PVDTi/TiN to perform compound treatment on the surface of Cr12MoV cold work die steel. The surface wear resistance and load capacity of the die are due to PVD Ti/TiN coating. When the mold surface is subjected to ion carburizing treatment, and then through PVD Ti/TiN compliance treatment, the effective strengthening of its compliance performance is better realized. In the process of composite treatment, first use ion carburizing to perform corresponding treatment on the middle thin layer, which enables Ti/TiN to obtain better supporting force, so as to better realize the improvement of the life of the cold work die. This technology fully demonstrates that when processing molds with relatively poor surface hardness, first ion carburizing treatment can be applied to them, and then corresponding PVD coating treatments can be applied to them. Through this comprehensive intervention method, it can be improved. Good realization of the effective improvement of the service life of the coating.　　 Some researchers used PECVD DLC coating treatment technology and PVD CrTiN coating treatment technology respectively in the production process of ASSAB 635 cold work die steel, and then implemented the imprint test of the chromium plating process on the mold after this treatment. From the surface point of view, the surface of the silver coin imprinted by the CRTiN coating mold, the chrome-plated mold and the surface quality are closer, but after receiving the DLC coating treatment, the surface of the silver coin is very obvious when the mold is embossed The blackening phenomenon is mainly due to the transfer of the coating to the surface of the silver coin, but this also fully confirms that the toughness of the DLC coating is relatively poor and the hardness is relatively high. After embossing the silver coins, the function of the chrome-plating mold also becomes invalid; after the embossing of 1000 silver coins, the CRTiN coating still shows better characteristics without any coating peeling Compared with the chrome-plated mold, the life of the mold can be improved by 2 times or more. In addition, other researchers used ion plating to plate a layer of TiN on the surface of the silver coin when processing the surface of the silver coin, and the comparison of experiments has confirmed that the impression after this technology has a longer life. The uncoated impression is improved by about 3 times. Because the coefficient of friction of DLC coating is very low, and it has good lubricating performance, and has good wear resistance, high hardness and good corrosion resistance, it is widely used in various composite pipe forming molds. , Its service life has also been increased by more than 3 times. In addition, through the application of the semiconductor packaging mold, its life is increased by about 10 times; by using the optical disk mold, its life can be increased by 4 million times; by turning over the punch of the air conditioner Application can increase its life span by at least 3 times, and the number of stamped parts can be increased by at least 8 million times. Some researchers have compared the implementation effects of the two methods of TiN and N composite coating prepared by multi-arc ion plating. The results found that the hardness of the battery shell forming punch after the latter treatment is significantly higher, and its resistance The grindability is also comparable to ZrN. In addition, by studying the life of the convex film, the life of the N composite coating prepared by the multi-arc ion plating method is at least 4 times longer than that of the convex film without coating treatment. When coating the punching and stamping dies, some researchers have adopted a new type of oblique impact sliding test. Through this test, the cyclic impact and the composite state of sliding force of the stamping die materials of automobile stamping parts were simulated. TiN coating Layer molds will show significant wear. During the analysis and blanking process of finite element software for high-strength steel, the simulation process of PVD coating is realized through the anti-wear and anti-friction angle. Graphit-iC-like graphite coating, MoST and CrMoN can promote the life of cold work die steel The impact on the coating will then weaken. According to the research results, the use of anti-friction coatings can promote the equivalent stress of the mold to be weakened to varying degrees, so as to better realize the life of the high-strength steel blanking die. Effective promotion. Fine blanking is a precision plastic forming process with higher quality, higher efficiency and higher added value. It can be said that higher quality parts can be obtained through one punching, and the precision stamping die fails, and at the same time it manifests as the following form , Including mold fracture, excessive wear and plastic deformation. TiAIN and TiN coatings have been widely used in the fine blanking industry due to their high corrosion resistance, thermal stability and good wear resistance. Previous post: The choice of mold materials must adhere to the principle of ensuring low prices under the premise of use