AQUEOUS CUTTING FLUID, AQUEOUS CUTTING AGENT AND CUTTING OF HARD AND BRITTLE MATERIAL USING THE SAME

摘要

PROBLEM TO BE SOLVED: To obtain an aqueous cutting fluid excellent in disperse stability and viscosity stability of abrasive grains and especially effective for wire saws and an aqueous cutting fluid usable therefor and provide a method for cutting hard and brittle materials excellent in processing accuracy, washing property, etc., of material to be cut. SOLUTION: This cutting fluid comprises a cationic water-soluble resin having 20-200 mg KOH/g amine value and at least one or more kinds of viscosity adjusters selected from inorganic and organic bentonite and aqueous silica sol and has nonvolatile substance content of the viscosity adjuster in an amount of 0.1-30 wt.% based on nonvolatile substance content of the cationic water-soluble resin. This method for cutting crustaceous materials comprises cutting hard and brittle materials with a cutter by using an aqueous cutting fluid obtained by adding abrasive grains to the above aqueous cutting fluid so that the content of the abrasive grains becomes 100-1,000 wt.% based on the nonvolatile substance content of the aqueous cutting fluid.