Diffusion of metal carbide coating technology is placed in special media piece, by the diffusion layer formed on the surface a few microns to tens of microns of metal carbide layer. The carbide layer has a very high hardness, HV up to 1600 ~ 3000 (decided by the carbide types), in addition, the carbide layer and the substrate carry out metallurgical bond, without affecting the surface finish, with a high wear resistance occlusion (bond), corrosion and other properties, can greatly improve the work life of molds and machine parts.
2, compared with the related technologies
Through the formation of super-hard compound in the surface layers of the method is significantly increase their wear resistance occlusion (anti-bonding), corrosion and other properties, thereby greatly improving the service life of efficient and economical method. Currently, ultra-hardened surface treatment methods include physical vapor deposition (PVD), chemical vapor deposition (CVD), physical and chemical vapor deposition (PCVD), diffusion of metal carbide layer technology to fulfill them, PVD method with the deposition temperature is low, the advantages of deformation on the workpiece, but the combination of film and substrate were less, around the plating process is bad, it is often difficult to play a super-hard compound coatings performance advantages. CVD method has a good interfacial adhesion, and good plating process around the outstanding advantages, but a lot of iron and steel materials, the matrix hardening its follow-up is too much trouble, slight mistake, the film would easily damage. Therefore, its application mainly in carbide and other materials. PCVD deposition temperature is low, membrane-based adhesion and technology around the plating of a greater improvement than those of PVD method, but compared with the diffusion method, membrane-based adhesion is still a wide gap, in addition to plasma membrane as PCVD method is still , although the law around the plating of an improvement over PVD, but not eliminate.
By the diffusion of metal carbide coating techniques to form metal carbide coating, the formation of metallurgical bonding with the substrate with PVD, PCVD can not match the film bonding strength, so the technology can really play a super-hard coating performance advantage, in addition to The technology does not exist around the issue of plating, hardening the matrix to facilitate follow-up, and can repeat the treatment several times, so that the applicability of the technology more widely.
Diffusion of metal carbide coating technology in Japan, European countries, Australia, Korea and other countries are widely used. According to the survey, many of the supporting mold on imported equipment heavily used the technology during the localization of these molds, the lack of the corresponding mature technology, low life often die, and some even can not be made domestically.
The technology of domestic seventies some people studied, the various aspects of Tiao Jian Dan De You Yu Xian Zhi, Gong Yi and Shebeiwangwang Nanyi Jingguopiliang and long-term production test makes this technology in some of the practical problems Buyibaolu or difficult to resolve, often give up halfway . We are in the 10 years of research and application process, there is the process of the technology on the device's practical problem-depth study and carried out effective improvements that the improved process and equipment ? to meet Zhangqiwending production requirements, the level of life to deal with mold mold imports of similar level of life, to obtain a wealth of practical application of various types of mold production experience, promote the use of the technology for large-scale lay a solid technical foundation.
Diffusion of metal carbide coating technology can be widely used in various types of wear, caused by occlusion or mechanical failure of the tool and mold parts. Which, by wear and tear caused by the failure (such as blanking, cold heading, powder molding, mold) can increase the life span several times to several times; occlusion caused by products or strain of mold problems (such as the extension mode, flanging mold, etc.), can be fundamentally resolved.
Applicable materials: die steel, carbon is higher than 0.3% of structural steel, cast iron, carbide. I am a professional writer from China Print Net, which contains a great deal of information about mercedes c 220 cdi , aston martin used cars, welcome to visit!
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