92-grade tire cord steel with coarse tensile fracture rate lower than 5 times per thousand tons and production method of 92-grade tire cord steel
A production method and technology of wire breakage rate, applied in the direction of temperature control, metal rolling, etc., can solve the problems of insufficient compensation for surface defects and low plasticity of wire rods
Active Publication Date: 2021-12-14
武汉钢铁有限公司
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Problems solved by technology
Although the rough breaking of the cord steel wire rod is manifested in various forms, the main reason can be attributed to the low plasticity of the wire rod, which is not enough to make up for its surface defects
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[0037] The present invention will be described in detail below in conjunction with specific embodiments and examples, and the advantages and various effects of the present invention will be presented more clearly. Those skilled in the art should understand that these specific implementations and examples are used to illustrate the present invention, not to limit the present invention.
[0038] Throughout the specification, unless otherwise specified, terms used herein should be understood as commonly used in the art. Therefore, unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. In case of conflict, this specification shall take precedence.
[0039] Unless otherwise specified, various raw materials, reagents, instruments and equipment used in the present invention can be purchased from the market or prepared by existing methods.
[0040] The ...
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Abstract
The invention particularly relates to 92-grade tire cord steel with a rough tensile wire fracture rate lower than 5 times per thousand tons and a production method of the 92-grade tire cord steel, and belongs to the technical field of steel preparation, and the method comprises the steps of molten iron desulfurization, converter smelting, argon blowing, LF furnace treatment, RH vacuum treatment, square billet continuous casting, square billet heating, high-speed wire rolling, stelmor controlled cooling and coil collection. Rapid cooling treatment is carried out at the temperature of 665 DEG C or above, the enough supercooling degree can be guaranteed, and abnormal precipitation of cementite is avoided; and the growth time of the pearlite can be prolonged by slowly cooling at 665 DEG C, so that the interlayer spacing of the pearlite is larger, and the oxide scale is thicker and more compact. The large interval between pearlite lamellas can ensure that the wire rod has high plasticity, the oxide scale is thick and compact, the stripping integrity of the oxide scale in the rough drawing process can be improved, the situation that the surface of the wire rod is scratched due to the fact that the fine oxide scale is adhered to a rough drawing wheel is avoided, and the surface quality of the wire rod is ensured.
Description
technical field [0001] The invention belongs to the technical field of steel preparation, and in particular relates to 92-grade cord steel with a rough drawing broken wire rate lower than 5 times per thousand tons and a production method thereof. Background technique [0002] Cord steel wire rod is the raw material for manufacturing tire meridians. The demand exceeds 2 million tons and is increasing year by year. The downstream deep processing process is lengthy, including a total of more than 20 passes of drawing and heat treatment. The iron scale on the surface of the wire rod needs to be removed before continuous cold drawing. With the increasingly stringent requirements of the society for energy conservation and environmental protection, the iron oxide scale removal process of the cord steel wire rod is changed from the previous pickling to mechanical removal. Scales, which also lead to changes in the user's requirements for the thickness of the oxide scale on the surfac...
Claims
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Patent Timeline
Login to View More IPC IPC(8): C22C33/04C22C38/02C22C38/04C22C38/06C22C38/18C22C38/20C22C38/24C22C38/26C22C38/28C22C38/40C22C38/42C22C38/46C22C38/48C22C38/50B21B1/16B21B1/46B21B37/76C21C7/064
CPCC22C33/04C22C38/02C22C38/04C22C38/20C22C38/06C22C38/26C22C38/24C22C38/28C22C38/18C22C38/40C22C38/42C22C38/48C22C38/46C22C38/50C21C7/0645B21B1/16B21B1/463B21B37/76
Inventor 鲁修宇任安超张帆陶勇叶途明
Owner 武汉钢铁有限公司