| 摘要 |
PURPOSE:To descale from the surfaces of hot rolled steel plates easily at a low cost by removing said scale by the use of fibrous elastic grind stone. CONSTITUTION:In the stage of cold rolling iron, steel or special steel after hot rolling, the surface scale formed during hot rolling is removed in one stage by using grind stone. To manufacture the grind stone, first abrasive grains such as emery, corundum, fused alumina or the like having #24-#400 grain sizes are mixed at 30-90% with a melt of polyolefin, cellulose acetate, etc., and the mixture is spun to short fibers having about 1-50mm. lengths. A resin such as epoxy or polyurethane as curing type resin and the above-mentioned abrasive grains are mixed with such abrasive grain-contg. resin fibers at ratios of 20-50wt% the former and 50-250wt% the latter basing on the weight of the abrasive grain-contg. resin fibers. The mixture is put in molds and is cured in the curing furnace, whereby the fibrous elastic grind stone is made. The scale is removed from the surfaces of the hot rolled steel plate by using such grind stone. |
