| 摘要 |
The invention relates to rolling engineering, namely to the methods of production of the rolled wire on the high-speed continuous wire mills. A method includes heating billets in a continuous heating furnace to the temperature of 1050… 1150 °C, subsequent rolling with alternation of the direction of reduction for 90° in roughing, run-down and finishing groups of block type stands, water cooling of the surface of breakdown before and behind of the finishing group of stands of block type with obtaining before subsequent air cooling on the roller conveyor of a rolled wire with surface temperature, which makes 750… 1050 °C. In the finishing group of block type stands additional stepped water cooling of the surface of breakdown is carried out in the lines of water cooling, which length is proportional to the maximum speed of rolling on the mill and makes at the first and second stage 0.08·Vmax and 0.07· Vmax respectively, under the pressure of cooling water 10… 12 bars. The temperature of the surface of breakdown after additional stepped water cooling at the first stage is maintained at the level of 670… 680 °C, and at the second stage - 520… 530 °C. The invention provides possibility of organizing thermomechanical treatment of the rolled wire in the production line of mill due to rolling in the range of temperatures of 750… 1050 °C with a gradient of temperature over the section of breakdown at the outlet from the mill of 50… 70 °C, which ensures increase of consumer properties of the finished products. |
