| 摘要 |
<p>PROBLEM TO BE SOLVED: To provide a lubricant composition for high-temperature processing of a metal, which does not cause the workpiece to be carburized even when it is used after a graphitic lubricant composition is used and does not cause scratches and seizure marks and to provide a method for using the same. SOLUTION: This composition comprises 5-30 pts.wt. at least one member selected from group A, 30-90 pts.wt. at least one member selected from group B and 5-40 pts.wt. at least one member selected from group C. Group A: tetrasilicic potassium mica, tetrasilicic sodium mica, natural phlogopite, bentonite, montmorillonite and vermiculite. Group B: boron oxide, boric acid, alkali metal borates, sodium carbonate, potassium carbonate, sodium silicate having a melting point of 1,000 deg.C or below and potassium silicate. Group C: an oxide of titanium, magnesium, silicon, tin, lead, zinc calcium, copper or aluminum and a hydroxide of magnesium, each of which has a mean-particle diameter of 0.01-20μm. This method comprises using a solution obtained by dissolving 20-80 pts.wt. above composition in 100 pts.wt. water.</p> |
