Tungsten Disulfide Solid Lubrication Material Performance Improvement

Isothermal die forging is a method of achieving die forging at a slower forming speed while maintaining the mold and the workpiece isothermal. Since the workpiece is deformed at a low strain rate at a high temperature, the deformed material can be sufficiently recrystallized. Therefore, the influence of work hardening can be overcome, and therefore, it is very suitable for forming a part with complicated structure and high strength.

Tungsten disulfide is a layered solid lubricant similar in structure to graphite. It has excellent high temperature resistance and extreme pressure resistance, good adsorption capacity to metal surfaces, and low thermal conductivity. WS2 was first applied to the lubrication of key parts of the US Mariner spacecraft. It was used to prepare high temperature extreme pressure grease and energy-saving engine oil, and achieved good application results.

However, the tungsten disulfide lubricant has a poor bonding force to the metal, is easy to expose the metal surface, is easy to crush the aluminum profile, has poor suspension, is prone to precipitation, has a high friction coefficient, a slow film formation rate, and heat resistance. The flatness and antibacterial properties need to be improved, and the surface protection properties of the metal also need to be improved. The improved solution of solid lubrication material can be achieved by the following technical solutions:

(1)Silane coupling agent KH560 was dissolved in water, stirred evenly, added nano-tungsten disulfide, ultrasonic stirred evenly, then added nano-carbon spheres, ultrasonic stirred evenly, and the mixture was obtained.

(2)PAO was mixed with nano-bentonite, Span-80 was added and stirred evenly to obtain the mixture.

(3)Mix the materials obtained in step (1) and step (2) evenly, add butyl acrylate and methyl acrylate, heat them to 67-72 ℃, stir for 30-40 minutes, add other residual ingredients, and continue stirring for 20-30 minutes.

By using nano-bentonite and acrylic ester, the suspension of lubricant is improved, and there is no agglomeration, turbidity and precipitation in 72 hours. The adhesion performance with metal is improved, the porosity is reduced, and the workpiece is prevented from being crushed. The reaction between tungsten disulfide and metal is reduced by using nano-carbon sphere, and the lubrication durability is improved by using nano-carbon sphere. Boric acid and sodium tungstate improve the wettability and lubricity of aluminium profiles, and improve the corrosion resistance of aluminium profiles.

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