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Tungsten disulfide (WS2) low friction and mold coating material

Time : 2021-10-26 Hits : 38


Tungsten disulfide (WS2) is a low-friction dry lubricant material. By reducing friction and noise, improving mold release and solving the problems of excessive wear, seizure, wear and fretting, it is more than other dry lubricants. Greatly improved performance and service life. The repair process of the tungsten disulfide coating is done by pressurized air, which hits the dry metal coating without heat, adhesive or adhesive. The lubricant coating can be immediately bonded to any metal or resin substrate with a thickness of 0.00002 inches (1/2 micron).

For more than 20 years, Huajing Materials has focused on the production of high-purity tungsten disulfide, and has conducted in-depth research on the crystal structure of tungsten disulfide materials.

Advantages and capabilities of tungsten disulfide
WS2 low-friction coating can overcome or reduce mechanical lubrication problems, thereby improving performance and extending service life.
When applied to a given power level, less fuel is used on engine components such as piston rings, cams, and holes, which reduces friction and thus reduces emissions.
Through wear, fretting and friction caused by dissimilar metals and their different hardness coefficients, it reduces the costly maintenance problems that cause failures and costly downtime.
Keep the dimensional integrity of the substrate within 1/2 micron without accumulation. Tungsten disulfide (WS2) particles do not adhere to themselves, so the coating thickness is limited to 1/2 micron.
It can withstand a load of 100,000 psi (or equal to the load capacity of the substrate) and work in a temperature range of -460°F to 1200°F (-273°C to 650°C).
Provides 100% lubricity in its entire texture.
It is inert, inorganic, non-toxic, non-distorting, non-corrosive, and resistant to most fuel solvents. It is compatible with all greases and enhances its performance.
Due to its extremely low coefficient of friction, it can resist carbon deposits, and its coefficient of friction is less than half that of graphite, molybdenum (MoS2) and Teflon.
Bonding with all materials and coating molecules can only be achieved by removing the bonded substrate.
The use of tungsten disulfide (WS2) does not require baking or thermal curing.
Tungsten disulfide can be lubricated under vacuum conditions;
After tungsten disulfide is oxidized, the friction coefficient is still low, which is the biggest advantage different from molybdenum disulfide.


Fig. 1 Friction coefficient of WS2 and MoS2 under different pressures


Fig.2 Friction coefficient of WS2 and MoS2 at different temperatures