| abstract |
(57) [Problem] To provide a method of rolling a metal material in which the number of rolling passes is reduced. The surface of a metal material plate is provided with (A) at least one water-soluble inorganic salt selected from the group consisting of sulfate, silicate, borate, molybdate, vanadate and tungstate. And (B) at least one lubricant selected from the group consisting of metal soaps, waxes and solid lubricants of straight-chain saturated fatty acids having 16 to 22 carbon atoms, and (A) a water-soluble inorganic salt; B) Solid content ratio with lubricant (B) / A: apply a water dispersion having (A) in the range of 0.06 to 5 and dry to form a solid film, and then roll the metal material at a temperature of room temperature to 500 ° C. It is a rolling method. The amount of the solid coating is 0.1 to 10 g. / M 2 . |