| 摘要 |
PROBLEM TO BE SOLVED: To provide a method of wire drawing for brass-plated steel wire where, even in the case a lubrication liquid heated at≤30°C is used, the increase in the temperature of brass-plated steel wire upon wire drawing treatment causing reduction in ductility can be suppressed, further, reduction in extreme pressure film formation reaction at each surface of the brass plated steel wire and dies can be suppressed, and the brass-plated steel wire having excellent wire drawability and ductility can be produced. SOLUTION: In the method of wire drawing for brass-plated steel wire where brass-plated steel wire 17 is wire-drawn using a lubrication liquid comprising an oil component and an extreme pressure component, a wire drawing device 1 provided with a downstream lubrication liquid tank 10B set with a final die 21Z and an upstream lubrication liquid tank 10A set with a plurality of dies 21 is used, and, as the lubrication liquid in the downstream lubrication liquid tank 10B, a downstream lubrication liquid 16 comprising ZnDTP (Zinc-Dialkyl-Dithiophosphate) as a component for suppressing reduction in extreme pressure film formation reaction and whose temperature is 15 to 30°C is used. COPYRIGHT: (C)2008,JPO&INPIT |
