LUBRICANT COMPOSITION FOR BLANKS IN THE PROCESS OF HOT PRESSURE METALWORKING Russian patent published in 2000 - IPC

FIELD: metalworking. SUBSTANCE: composition contains, wt %: (i) glass powder 0-80 and glass frits 0-50, given that content of at least one of the two components is not zero, (ii) natural or synthetic graphite 10-25, (iii) one or several alkali metal silicates of general formula M₂O_nSiO₂, in which M is lithium, potassium, or sodium and n=0-3, (iv) water-soluble sodium polymetaphosphate 1-3, (v) thickener 0.5-4, and (vi) borax 0-1. Aqueous dispersion advantageously contains 20-50% of components i-vi. EFFECT: enabled formation of uniform high adhesive, mechanically strong, and waterproof film for lubricating parts with surface temperature 800 to 1300 C. 10 cl