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Production process of steel wire rod for producing prestress steel strand by utilizing mini-rolling mill

A technology of prestressed steel strands and mini rolling mills, which is applied in metal rolling, metal rolling, workpiece surface treatment equipment, etc., can solve the problems of long aging time and unstable performance of finished products, and achieve shortening of aging time and reduction of fans The effect of using amount and lowering the spinning temperature

Inactive Publication Date: 2019-09-17
ZENITH STEEL GROUP CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, domestic high-end production lines mainly use domestic equipment, and there are many production lines, accounting for about 70%. High temperature rolling process, resulting in unstable performance of finished products, long aging time and other problems

Method used

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  • Production process of steel wire rod for producing prestress steel strand by utilizing mini-rolling mill
  • Production process of steel wire rod for producing prestress steel strand by utilizing mini-rolling mill
  • Production process of steel wire rod for producing prestress steel strand by utilizing mini-rolling mill

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Experimental program
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Embodiment 1

[0013] See figure 1 , a method of utilizing a mini-rolling mill to produce wire rods for prestressed steel strands. The wire rods prepared in this embodiment are Φ12.5mm 82B wire rods, which include heating of the heating furnace blank, 6 passes of rolling by the roughing mill, There are 8 rolling passes in the intermediate rolling mill, 4 rolling passes in the pre-finishing rolling mill, water cooling, rolling in the finishing mill, water cooling, mini mill rolling, water cooling, silk spinning, air-cooled roller table cooling and coil collection processes.

[0014] In the billet heating process, the temperature in the heating section of the heating furnace is 1100-1180°C, the temperature in the soaking section is 1160-1240°C, and the rolling start temperature is controlled to 1080±30°C; in the rolling process of the finishing mill, the temperature at the entrance of the finishing mill is 880- 900°C; in the mini-mill rolling process, the inlet temperature of the mini-rolling ...

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Abstract

The invention discloses a production process of a steel wire rod for producing a prestress steel strand by utilizing a mini-rolling mill. The equipment advantage of the mini-rolling mill is fully utilized, and the material for producing the prestress steel strand is developed and produced. According to the method, the rolling production process of a conventional prestress steel strand is broken through, technological parameter optimization measures such as the key temperature points of the mini-rolling mill and the spinning are groped and adjusted, the tensile strength, the grain size, the surface shrinkage and other comprehensive performances of the produced prestress steel strand material are obviously improved, and meanwhile aging time of the steel type is shortened.

Description

technical field [0001] The invention belongs to the field of metallurgy and relates to a method for producing wire rods for prestressed steel strands with a mini-rolling mill. Background technique [0002] Since the 1980s, major foreign steel-producing countries have generally adopted high-speed wire rod mills and controlled cooling technology as the main process technology for high-speed wire production. Some domestic high-end production lines generally use a continuous rolling mill consisting of 28+4 rolling mills to produce rods. The rolling process is generally divided into five stages: rough rolling, intermediate rolling, pre-finishing rolling, finishing rolling and reducing and sizing unit rolling. Between the pre-finishing mill and the finishing mill, between the finishing unit, the reducing and sizing unit and the laying unit, there are several sections of water-cooled boxes. By controlling the water temperature, water pressure and water volume of the water-cooled bo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/16B21B37/74B21B45/02
CPCB21B1/16B21B37/74B21B45/0224
Inventor 吴亚东张黎明沈艳
Owner ZENITH STEEL GROUP CORP
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