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Coil production method and production line thereof

A production method and production line technology, applied in the field of coil production method and production line, can solve the problems of increased energy consumption in workshop production, increased production line length, increased construction engineering quantity, etc., so as to reduce production failure rate, reduce cooling line length, The effect of improving the yield

Active Publication Date: 2016-06-15
CISDI ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, the current method of water cooling before and after sizing to control the temperature of the wire rod has the following problems: to ensure the surface temperature and cross-sectional temperature gradient of the wire rod when it enters the sizing reduction and the entrance of the laying machine, a long "recovery section" is required after the rolled piece is cooled. , will increase the length of the production line, increase the amount of construction work, increase the energy consumption of workshop production, and increase production costs

Method used

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  • Coil production method and production line thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0051] The production process of threaded steel bar is as follows:

[0052] (1) Heating: The billet is heated to 1000±50°C in a walking beam heating furnace.

[0053] (2) Rough rolling and intermediate rolling: The rough rolling temperature of the steel billet is controlled at 1000°C to 1100°C. During rolling, there are guides at the front and back of each rolling mill, and flying shears are installed behind the rough and intermediate rolling units. The billet is cut, and the elongation coefficient of each pass is controlled to be 1.25 to 1.3 during the rough rolling process; the temperature is controlled to ensure the reduction of the rough and medium rolling passes, and rolling within this temperature range can realize repeated recrystallization rolling , is conducive to the refinement of austenite grains, and can also reduce the loss of rolls in the rough and medium rolling units and improve the utilization rate.

[0054] (3) Pre-finishing and finishing rolling: after comp...

Embodiment 2

[0061] The production process of high-quality steel coils is as follows:

[0062] (1) Heating: The billet is heated to 1000°C to 1200°C in a walking beam heating furnace.

[0063] (2) Rough rolling and intermediate rolling: The rough rolling temperature of the steel billet is controlled at 950°C to 1150°C. During rolling, there are guides at the front and back of each rolling mill, and flying shears are installed behind the rough and intermediate rolling units. The billet is cut, and the elongation coefficient of each pass is controlled to be 1.2 to 1.35 during the rough rolling process, and the temperature is controlled to ensure the reduction in the rough and medium rolling passes. Rolling within this temperature range can realize repeated recrystallization rolling , is conducive to the refinement of austenite grains, and can also reduce the loss of rolls in the rough and medium rolling units and improve the utilization rate.

[0064] (3) Pre-finishing and finishing rolling...

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Abstract

The invention discloses a coil production method and a production line thereof. The production line comprises a heating furnace, a rough rolling unit, a medium rolling unit, a pre-finish rolling unit, a finish rolling unit, a reducing and sizing unit, a spinning machine, an air-cooling line, a reel collecting station and other devices. A blank is subjected to the first step of heating, the second step of rough rolling and medium rolling, the third step of pre-finish rolling and finish rolling, the fourth step of reducing and sizing, the fifth step of spinning, the sixth step of fast cooling after spinning, the seventh step of air-cooling line controlled cooling and the eighth step of reel collecting and packaging in sequence on the above devices. Controlled rolling in a critical austenite area is achieved by accurately controlling the rolling temperature, the low-temperature phase change is achieved, a rolled piece directly enters the spinning machine without being subjected to water cooling after reducing and sizing are conducted, the phenomenon of water blocking caused during small-specification water passing is effectively avoided, the production fault rate is reduced, the distance between the reducing and sizing unit and the spinning machine is shortened, and the length of the cooling line is reduced; and due to the combination of two sections of water cooling and air cooling after spinning, the cooling efficiency is improved, transformation of a control structure is achieved, investment is reduced, and the market competitiveness is improved.

Description

technical field [0001] The invention belongs to the technical field of hot-rolled wire rods in the metallurgical industry, and in particular relates to a coil production method and a production line thereof. 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, the output has continued to increase, reaching 154 million tons in 2014, accounting for 18.7% of China's total crude steel. [0003] Steel production consumes a lot of energy and has a huge impact on the environment. Under the current increasingly stringent energy and environmental requirements, the contradiction between reducing production energy consumption and improving the performance of steel products is intensifying. [0004] Continuous casting and rolling, hot charging and hot delivery, controlled rolling and controlled cooling can effectively reduce energy consumption. At...

Claims

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Application Information

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IPC IPC(8): B21B1/22B21B41/00B21B45/02B21B37/74
CPCB21B1/22B21B37/74B21B41/00B21B45/0206
Inventor 周民韩会全马靳江牛强
Owner CISDI ENG CO LTD
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