High-speed wire rod, large-coil composite wire and production method

Abstract

The invention relates to a high-speed wire rod and large-coil composite wire and a production method, and belongs to the technical field of long material production in the ferrous metallurgical industry, the high-speed wire rod and large-coil composite wire comprises a common section, and a high-speed wire rod section and a large-coil section which are connected with the common section; the common section comprises a blank heating device, a roughing rolling unit, a roughing rolling unit rear flying shear, an intermediate rolling unit, an intermediate rolling rear water cooling device and an intermediate rolling unit rear flying shear which are sequentially arranged in the rolling direction; the high-speed wire rod section comprises a pre-finish rolling unit, a pre-finish rolling post-water-cooling device, a finish rolling unit I, a finish rolling unit II, a finish rolling post-water-cooling device, a reducing and sizing unit, a reducing and sizing post-water-cooling device, a high-speed flying shear, a silking machine front pinch roll, a silking machine, an air cooling line and a coil collecting and collecting system which are sequentially arranged in the rolling direction; and the large coiling section comprises a finishing mill group, a water cooling device after finish rolling, a flying shear, a reducing and sizing mill group, a water cooling device after reducing and sizing and a collecting system which are sequentially arranged in the rolling direction. According to the invention, collinear production of the high-speed wire rod and the large coil is realized, and the investment and operation cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of long product production in the iron and steel metallurgy industry, and relates to a high-speed wire rod and a large coil composite wire and a production method. Background technique [0002] As one of the important products in the steel industry, wire rods are widely used in the automobile, machinery and metal products industries. Production has continued to increase in recent years. [0003] 1) High-speed wire rod production line [0004] The main rolling line rolling unit of the high-speed wire rod production line mainly includes: rough rolling unit, intermediate rolling unit, pre-finishing rolling unit, finishing rolling unit and reducing and sizing unit. At present, the number of high-speed wire rod roughing mills, intermediate rolling mills, pre-finishing mills, finishing mills and reducing and sizing mills is generally 6+6+6+8+4 frames respectively. The number of rolling mills in the diameter rol...

AI Technical Summary

Problems solved by technology

[0007] With the improvement of customers' performance requirements for steel products and the demand for cost control of steel plants, in order to obtain better mechanical properties, it is necessary to use a full line of low-temperature rolling. However, at present, the high-speed wire rod finishing mill and the reducing and °Top-crossing cantilever rolling mill, the rolling mill is unstable when rolling large-scale products, and low-temperature rolling cannot be realized, and all rolling is carried out at a temperature above 850°C

[0008] Some large coil production lines are equipped with three-roll reducing and sizing units. However, the current large coil production lines equipped with three-roll reducing and sizing units have a low production line speed of no more than 18m / s, resulting in low hourly output of the rolling line.

[0009] In addition, the high-speed wire production line and the large-coil production line are arranged in separate lines, which cannot realize the production of the two on the same line, and the flexibility of the production line is insufficient, which makes the investment and operation costs higher.

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