| abstract |
(57) [Summary] [Purpose] Descaling of SUS wire rods without salt bath or pickling, and formation of a lubricating coating without the use of organic solvents for continuous wire drawing. [Configuration] Between the supply stand 1 and the winding device 3, Straightening machine 11, air blasting device 13, brushing device 15, A continuous wire drawing device provided with an inorganic salt adhering tank 17 containing an aqueous solution of a water-soluble inorganic salt in a heat-retaining state, a wire rod starting device 19, a blower 21, a hot air blowing pipe 23, and a wire drawing die device 25 with a die box. It was used to continuously draw SUS304 steel. For air blasting, amorphous Al 2 O 3 powder having a particle size of 0.3 mm or less was used and blasting was performed at 4 atm. For brushing, a nylon brush containing SiC abrasive grains was used. Al 2 O 3 can be descaled almost completely by air blasting, and smoothing and biting into Al 2 O 3 by brushing. The powder could be removed, the lubricating coating of the water-soluble inorganic salt adhered well, and good continuous wire drawing was possible. |