A high-speed wire rod compact non-porous rolling production line and production method

Abstract

The invention relates to a high-speed wire rod compact type non-porous rolling production line and a production method. The high-speed wire rod compact type non-porous rolling production line comprises a heating unit, a rough rolling unit, a medium rolling unit, a pre-finish rolling unit and a finish rolling unit, wherein the heating unit, the rough rolling unit, the medium rolling unit, the pre-finish rolling unit and the finish rolling unit are arranged in sequence. A plurality of plain-barreled roll rolling mills or a rolling mill which plain-barreled rolls and vertical rolls are alternately arranged on is used for rolling several times, wherein the coefficient of elongation in each time of rolling in the rolling process is controlled to range from 1.15 to 1.45, the broadsiding coefficient in each time of rolling ranges from 0.1 to 0.45, and the running speed of a billet in the rolling process ranges from 0.1 m / s to 20.0 m / s. According to the high-speed wire rod compact type non-porous rolling production line and the production method, the number of the rolling mills is lowered, the failure rate of the rolls and energy consumption are lowered, production efficiency is improved, floor space is reduced for a plant, investment is lowered, and the problems that a roll line is quite long, the number of the rolling mills is large, the failure rate of the rolls is high, the energy consumption is high, and products easily have quality detects are solved.

Description

technical field [0001] The invention relates to the field of iron and steel metallurgy, in particular to a high-speed wire rod compact non-porous rolling production line and a production method. Background technique [0002] As one of the important products in the iron and steel industry, wire rod is widely used in construction, machinery and metal products industries. In recent years, production has continued to increase, reaching 25% of China's total steel output in 2012. [0003] As we all know, the rolling mills of the high-speed wire rod main rolling line mainly include: roughing mills, intermediate rolling mills, pre-finishing mills, finishing mills and reducing and sizing mills. At present, the number of high-speed wire rod roughing mills, intermediate rolling mills, pre-finishing mills, finishing mills and sizing mills is 6+6+6+8+4 respectively, and the number of rolling mills has reached 30 frame, or more. With the improvement of customers' performance requiremen...

AI Technical Summary

Problems solved by technology

[0005] 1. Pass rolling is adopted, and the production must be carried out after grooves are made on new rolls. The utilization rate of the rolls is low. At the same time, the uneven wear of the rolling grooves and the influence of the side walls of the pass reduce the number of roll reruns and increase the consumption of the rolls. Production higher cost

[0006] 2. During the rolling process, due to the limitation of the width of the rolled piece by the side wall of the pass, if the pass and regulation are not set properly or the reduction is not adjusted properly or the rolling temperature and rolling speed fluctuate, problems such as overfilling and underfilling are prone to occur , resulting in defects such as ears and folds, affecting the dimensional accuracy and surface quality of high-speed wire products;

[0008] 3. After the roll is worn out, the hole needs to be replaced and the machine stopped, which affects the productivity of the rolling mill;

[0009] 4. Due to the grooving of the roll, the strength and rigidity of the roll are reduced, and the diameter of the roll becomes smaller after grooving, the maximum bite angle will also be smaller, and the blank adaptability range is narrower

[0010] 5. Since high-speed rolling requires the pass to participate in the deformation, the overall adaptability and versatility are poor, the requirements for the rolled piece are high, the utilization rate of the roll is poor, the power consumption of rolling with a pass is high, the production cost is increased, and the production efficiency is reduced.

[0011] However, the high-speed wire rod is produced by the non-porous rolling production method, which still has a long rolling line, a large number of rolling mills, and zigzag folding defects that appear after several passes of non-porous rolling, which affects the quality of the final product.

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