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Steel rolling method for reducing size of inclusions of tire cord steel wire rod

A technology for cord steel and inclusions, which is applied in the field of steel rolling to reduce the size of inclusions in cord steel and wire rods, and can solve the problems of large inclusions that are difficult and small at the same time

Active Publication Date: 2021-11-23
ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defects in the prior art that it is difficult to reduce the size of the inclusions in the cord steel wire rod, and there is no relevant research on controlling the size of the inclusions to become smaller during the rolling process, thereby providing A Steel Rolling Method for Reducing the Size of Inclusions in Cord Steel Wire Rod

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0030] This embodiment provides a steel rolling method for reducing the size of inclusions in cord steel wire rods. The specific steps are as follows:

[0031] The rolling billet is LX82A, the rolling specification is 5.5mm, the temperature of the preheating section of the heating furnace is controlled at 1000-1030°C, the temperature of the heating section is controlled at 1250-1280°C, and the temperature of the soaking section is controlled at 1250-1280°C; control the heating The air-fuel ratio in the soaking stage and the soaking stage is 0.55; the moisture content in the flue gas is ≤ 5%; the temperature difference in the length direction of the billet soaking stage is controlled to about 40°C;

[0032] High-speed twist-free rolling is carried out with a rolling mill layout of 6 rough rolling passes + 6 intermediate passes, 4 passes pre-finish rolling and 10 passes finish rolling. The surface temperature of the piece is controlled at 1150-1200°C, the rolling speed is 105m / s...

Embodiment 2

[0036] This embodiment provides a steel rolling method for reducing the size of inclusions in cord steel wire rods. The specific steps are as follows:

[0037] The rolling billet is LX86A, the rolling specification is 5.5mm, the temperature of the preheating section of the heating furnace is controlled at 1010-1050°C, the temperature of the heating section is controlled at 1260-1290°C, the temperature of the soaking section is controlled at 1260-1290°C, and the heating The air-fuel ratio of the stage and the soaking stage is 0.58, and the moisture content in the flue gas is ≤5%; the temperature difference in the length direction of the billet soaking stage is controlled to be about 35°C;

[0038] High-speed twist-free rolling is carried out with a rolling mill layout of 6 passes rough rolling + 6 passes intermediate rolling, 4 passes pre-finish rolling and 10 passes finish rolling. The surface temperature of the piece is controlled at 1180-1250°C, the rolling speed is 102m / s, ...

Embodiment 3

[0042] This embodiment provides a steel rolling method for reducing the size of inclusions in cord steel wire rods. The specific steps are as follows:

[0043] The rolling billet is LX92A, the rolling specification is 5.5mm, the temperature of the preheating section of the heating furnace is controlled at 1020-1050°C, the temperature of the heating section is controlled at 1270-1300°C, the temperature of the soaking section is controlled at 1270-1300°C, and the heating The air-fuel ratio of the stage and the soaking stage is 0.50, and the moisture content in the flue gas is ≤5%; the temperature difference in the length direction of the billet soaking stage is controlled to be about 30°C;

[0044] High-speed twist-free rolling is carried out with a rolling mill layout of 6 rough rolling passes + 6 intermediate passes, 4 passes pre-finish rolling and 10 passes finish rolling. The surface temperature of the piece is controlled at 1200-1300°C, the rolling speed is 101m / s, and the ...

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PUM

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Abstract

The invention belongs to the technical field of ferrous metallurgy, and particularly relates to a steel rolling method for reducing the size of inclusions of a tire cord steel wire rod. According to the steel rolling method for reducing the size of the inclusions of the tire cord steel wire rod, a new inclusion control thought is provided, the heating temperature, the rolling surface temperature, the spinning temperature and the air cooling speed in the rolling process are optimized, the size of the inclusions in the tire cord steel wire rod can be effectively reduced in the rolling process, the inclusions of the prepared cord steel wire rod have the characteristics of small size, easiness in deformation and the like, so that the drawing wire breakage rate caused by the inclusions of the cord steel is obviously reduced.

Description

technical field [0001] The invention belongs to the technical field of iron and steel metallurgy, and in particular relates to a steel rolling method for reducing the size of inclusions in cord steel wire rods. Background technique [0002] Steel cord is a common rubber skeleton material, widely used in radial tires of various cars, trucks and airplanes. In the production process of steel cord, it is necessary to draw the cord steel wire rod raw material with a diameter of 5.5mm into a filament with a diameter of 0.15-0.38mm, and the elongation rate can reach 1000 times. During the drawing process, the temperature of the steel wire generally does not exceed 300°C. At this temperature, the inclusions in the steel wire are very brittle and do not undergo plastic deformation. The size of the inclusions basically remains unchanged, while the diameter of the steel wire decreases continuously with the drawing process. Therefore, on the cross-section of the steel wire where the in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B21B1/16B21B37/74C21D8/06
CPCB21B1/16B21B37/74C21D8/065Y02P10/20
Inventor 麻晗沈奎
Owner ZHANGJIAGANG RONGSHENG SPECIAL STEEL CO LTD