Jewelry PVD vaccum coating equipment
Compared with the traditional plating process, the jewelry vacuum plating process is more expensive, but the performance of adhesion, corrosion and wear resistance has been greatly improved, If you want to plating imitation gold, for stainless steel substrates we recommended to choose vacuum coating , For plastic material we suggest using evaporation coating machine.
PVD means "physical vapor deposition", which refers to a thin film preparation technology that uses physical methods to deposit materials on the workpiece to be plated under vacuum conditions.
PVD coating and PVD coating machine
PVD (physical vapor deposition) coating technology is mainly divided into three categories, vacuum evaporation coating, vacuum sputtering and vacuum ion coating. Corresponding to the three categories of PVD technology, the corresponding vacuum coating equipment also has three types: vacuum evaporation coating machine, vacuum sputtering coating machine and vacuum ion coating machine. In the past ten years, the development of vacuum ion plating technology is the fastest, and it has become one of the most advanced surface treatment methods today. What we usually call PVD coating refers to the vacuum ion coating; the PVD coating machine usually refers to the vacuum ion coating machine.
The specific principle of PVD coating (ion coating) technology is to use low-voltage, high-current arc discharge technology under vacuum conditions, use gas discharge to evaporate the target material and ionize the vaporized substance and gas, and use electric field acceleration Function to deposit the evaporated substance and its reaction products on the workpiece.
The characteristics of PVD coating film layer, the film layer plated by PVD coating technology has the characteristics of high hardness, high wear resistance (low friction coefficient), good corrosion resistance and chemical stability, and the film has a longer life ; At the same time, the film can greatly improve the appearance and decoration performance of the workpiece.
The types of films that can be plated by PVD coating. PVD coating technology is an environmentally friendly surface treatment method that can truly obtain micron-level coatings without pollution. It can prepare various single metal films (such as aluminum, titanium, zirconium, chromium, etc.) ), nitride film (TiN, ZrN, CrN, TiAlN) and carbide film (TiC, TiCN), and oxide film (such as TiO, etc.). The thickness of the PVD coating film layer—The thickness of the PVD coating film layer is on the micron level, and the thickness is relatively thin, generally 0.3μm～5μm. The thickness of the decorative coating film layer is generally 0.3μm～1μm, so it can hardly affect the original workpiece In the case of size, various physical and chemical properties of the surface of the workpiece are improved, and no further processing is required after plating.
The type of color of the film that can be plated by PVD coating—The color of the film that can be made by PVD coating at present is dark golden yellow, light golden yellow, brown, bronze, gray, black, gray black, seven colors, etc. By controlling the relevant parameters in the coating process, the plated color can be controlled; after the coating is finished, the color can be measured with related instruments to quantify the color to determine whether the plated color meets the requirements.
The similarities and differences between PVD coating and traditional chemical electroplating (water electroplating) PVD coating and traditional electroless electroplating are similar in that both belong to the category of surface treatment, and one material is covered by another in a certain way surface. The difference between the two is: PVD coating has greater bonding force with the surface of the workpiece, the hardness of the coating is higher, wear resistance and corrosion resistance are better, and the performance of the coating is more stable; PVD coating will not produce Toxic or polluting substances.
PVD coating technology is currently the main application industry, the application of PVD coating technology is mainly divided into two categories: decorative coating and tool coating. The purpose of decorative plating is mainly to improve the appearance and decoration performance and color of the workpiece while making the workpiece more wear-resistant and corrosion-resistant to extend its service life; this aspect is mainly used in various fields of the hardware industry, such as door and window hardware, locks, bathroom hardware and other industries. The purpose of tool plating is to improve the surface hardness and wear resistance of the workpiece, reduce the friction coefficient of the surface, and increase the service life of the workpiece; this aspect is mainly used in various cutting tools, turning tools (such as turning tools, planers, milling cutters) , Drill bits, etc.), various hardware tools (such as screwdrivers, pliers, etc.), various molds and other products. :
The main features and advantages of PVD coating (ion coating) technology—compared with vacuum evaporation coating and vacuum sputtering coating, PVD ion coating has the following advantages:
A. The film layer and the surface of the workpiece have strong bonding force, which is more durable and wear-resistant
B. The diffraction performance of ions is good, and it can coat workpieces with complex shapes 0v+R0S4
C. Fast film deposition rate and high production efficiency
D. Wide variety of coatable layers
E. The film has stable performance and high safety (obtained FDA certification and can be implanted in the human body).
The development of PVD technology
PVD technology appeared in the late 1970s, and the prepared film has the advantages of high hardness, low friction coefficient, good wear resistance and chemical stability. The initial successful application in the field of high-speed steel cutting tools attracted great attention from the manufacturing industries around the world. While developing high-performance and high-reliability coating equipment, they also carried out more in-depth coating in cemented carbide and ceramic cutting tools. Layer application research. Compared with the CVD process, the PVD process has a low processing temperature and has no effect on the bending strength of the tool material when it is below 600 ℃; the internal stress state of the film is compressive stress, which is more suitable for the coating of carbide precision and complex tools; PVD The process has no adverse effects on the environment, and is in line with the development direction of modern green manufacturing. At present, PVD coating technology has been widely used in the coating treatment of cemented carbide end mills, drills, step drills, oil hole drills, reamers, taps, indexable milling inserts, special-shaped tools, welding tools, etc.
PVD vaccum coating equipment/PVD Vacuum coating machine/PVD vaccum coating equipment/PVD Vacuum coating machine
PVD technology not only improves the bonding strength between the film and the tool matrix material, but the coating composition has also evolved from the first generation of TiN to TiC, TiCN, ZrN, CrN, MoS2, TiAlN, TiAlCN, TiN-AlN, cnx, DLC and ta- C and other multiple composite coatings.
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