To enter a new industry, we need to start with the most basic knowledge, and gradually study it in depth. In the PVD vacuum coating equipment industry is the same, need from the PVD vacuum coating machine basic knowledge from shallow to upgrade. For example, the structure, principle, technology of the coating equipment, the later maintenance of the machine, and the completion of the overall effect of the final product coating all need to be done step by step. Then Huicheng vacuum editor will introduce the five basic knowledge of PVD vacuum coater coating industry in detail. If you want to enter or prepare to enter the vacuum industry partner, you can refer to:
1、 PVD (physical vapor deposition) technology is mainly divided into three categories: vacuum evaporation coating, vacuum sputtering coating and vacuum ion coating. Compared with the three categories of PVD technology, the corresponding vacuum coating equipment includes vacuum evaporation coating machine, vacuum sputtering coating machine and vacuum ion coating machine. In recent ten years, the development of vacuum ion plating technology is the fastest, it has become one of the most advanced surface treatment methods. What we usually call PVD coating is vacuum ion coating; Generally speaking, the PVD coater refers to the vacuum ion coater
2、 The principle of ion plating (PVD) technology is to use low voltage and high current arc discharge technology under vacuum conditions. The target is evaporated and the evaporated material is ionized by gas discharge. Under the action of electric field, the evaporated material or its reaction product is deposited on the workpiece. The similarities between PVD coating and traditional electroless plating are that both of them belong to the category of surface treatment, and both of them make one material cover the surface of another material in a certain way. The differences between them are: the adhesion between PVD coating and workpiece surface is greater, the hardness of the coating is higher, the wear resistance and corrosion resistance are better, and the performance of the coating is more stable; PVD coating can be plated on a wider range of film types, can be plated on a variety of film colors are more beautiful; PVD coating will not produce toxic or polluting substances.
3、 At present, PVD coating can not replace chemical plating, and in addition to direct PVD coating on the surface of stainless steel, chemical plating Cr (chromium) is needed before PVD coating on many other materials (such as zinc alloy, copper, iron, etc.). PVD coating is mainly used in some high-end hardware products. For those hardware products with low price, it is usually only chemical plating instead of PVD coating. The PVD coating has the characteristics of high hardness, high wear resistance (low friction coefficient), good corrosion resistance and chemical stability; At the same time, the film can greatly improve the decorative performance of the workpiece.
4、 PVD film can be directly plated on stainless steel and cemented carbide. For zinc alloy, copper, iron and other die castings, chemical chromium plating should be carried out before PVD coating. PVD coating technology is a kind of environmental protection surface treatment method which can truly obtain micron scale coating without pollution. It can prepare various single metal films (such as aluminum, titanium, zirconium, chromium, etc.), nitride films (tin [titanium], ZrN [zirconium], CrN, TiAlN), carbide films (tic, TiCN), and oxide films (such as TiO, etc.). The thickness of PVD coating is micron level, which is generally 0.1 μ m～5 μ m. The thickness of decorative coating is generally 0.1 μ m~1 μ m. Therefore, the physical and chemical properties of the surface of the workpiece can be improved without affecting the original size of the workpiece, and the size of the workpiece can be maintained basically unchanged without further processing.
5、 The application of PVD coating technology is mainly divided into two categories: decorative coating and tool coating. The main purpose of decorative plating is to improve the decorative performance and color of the workpiece, make the workpiece more wear-resistant and corrosion-resistant, and extend its service life; This is mainly used in various fields of hardware industry, such as door and window hardware, lock, bathroom hardware and other industries. The main purpose of tool plating is to improve the surface hardness and wear resistance of the workpiece, reduce the friction coefficient of the surface and improve the service life of the workpiece; This aspect is mainly used in a variety of cutting tools, turning tools (such as turning tools, planers, milling cutters, drill bits, etc.) and other products
The basic knowledge of PVD vacuum coating machine is not only the above five items, such as optics, decoration, winding, hard coating, etc. according to the type, there are differences between the types and the related equipment