Aqueous lubricant used for plastic working of metallic...

C - Chemistry – Metallurgy – 10 – M

Patent

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Details

C10M 159/06 (2006.01) B21C 9/00 (2006.01) B21C 9/02 (2006.01) B21J 3/00 (2006.01) C10M 111/00 (2006.01) C10M 125/00 (2006.01) C10M 125/10 (2006.01) C10M 173/00 (2006.01) C10M 173/02 (2006.01)

Patent

CA 2418942

An aqueous lubricant used for plastic working of metallic material which comprises (A) a water soluble inorganic salt, (B) lubricative agent selected from molybdenum disulfide and graphite and (C) wax, wherein the components are dissolved or dispersed in water, and wherein a concentration ratio (weight ratio) of (B)/(A) is in the range of 1.0-5.0 and (C)/(A)is 0.1-1Ø And a method of lubricative film processing on a metallic material, in that the lubricative film formed by applying the aqueous lubricant is in a dried weight of 0.5-40g/m2. A water soluble inorganic salt (A) is preferably selected from the group consisting of a sulfate, a silicate, a borate, a molybdete and a tungstate. The wax (C) is preferably a natural wax or a synthetic wax which is dispersed in water and has a melting point of 70-150°C. The aqueous lubricant can be used for imparting excellent lubricity with ease to the surface of a metal having no chemical conversion layer formed thereon.

L'invention concerne un lubrifiant aqueux qui est utilisé dans le travail au plastique d'un matériau métallique et qui contient (A) un sel inorganique soluble dans l'eau, (B) un agent lubrifiant sélectionné parmi un bisulfure de molybdène et un graphite, et (C) une cire, les composés étant dissous ou dispersés dans l'eau, et un rapport de concentration solide (rapport pondéral) (B)/(A) étant compris entre 0,3 et 1,5 et (C)/(A) entre 0,1 et 1,0. Ladite invention concerne aussi un procédé de traitement d'un matériau métallique au moyen d'un film lubrifiant, caractérisé en ce qu'on forme un film lubrifiant en appliquant ledit lubrifiant aqueux, de préférence doté d'un poids sec compris entre 0,5 et 40g/m?2¿, sur un matériau métallique clarifié, puis on le sèche. Le sel inorganique soluble dans l'eau (A) est, de préférence, sélectionné parmi un sulfate, un silicate, un borate, un molybdate et un tungstate. La cire (C) est, de préférence, une cire naturelle ou une cire synthétique dispersée dans l'eau et dont le point de fusion est compris entre 70 et 150·. On peut utiliser le lubrifiant aqueux pour facilement donner à la surface d'un métal ne possédant pas de film chimique, un excellent aspect lubrifié.

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