Heat Resistant Water-based Nano Tungsten Disulfide Isothermal Forging Lubricant

Tungsten disulfide (WS₂) is a kind of layered solid lubricant with structure similar to graphite. It has excellent high temperature resistance, extreme pressure resistance, good adsorption capacity on metal surface and low thermal conductivity. WS₂ was first applied to the lubrication of the key parts of the American mariner spacecraft, and it was used to prepare high temperature extreme pressure grease and energy-saving engine lubricating oil, with good application results.

As a technical improvement project, the researchers proposed a preparation method of heat resistant water-based nano tungsten disulfide isothermal die forging lubricant, which includes the following steps:

(1)Dissolve the silane coupling agent KH560 in water, stir evenly, add the nano-W₂S and nano-W₃O₃, stir uniformly by ultrasonic, then add the nano carbon ball, stir uniformly by ultrasonic, and get the mixed material;

(2)Pan-80, nano montmorillonite and polystyrene quaternary ammonium salt were added into the mixture of pan-80 and nano bentonite to obtain the mixture;

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

Lubricating fluid improves the suspension of lubricating fluid by using nano bentonite and acrylate. It has no agglomeration and turbid precipitation in 72 hours, improves the adhesion with metal, reduces pores, prevents crushing of workpieces, and reduces the use of nano carbon spheres. The reaction of tungsten disulfide with metal improves the durability of lubrication; by using nano montmorillonite, polyalkylene glycol, nano tungsten trioxide, polystyrene quaternary ammonium salt, the dispersion stability of lubricating fluid is improved, and the metal has good physical adsorption, can quickly adsorb on the metal surface to form a uniform protective film, improve lubricity, and maintain good lubrication performance at high temperatures.

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