Class 82 cord steel with rough drawing broken wire rate lower than 3 times per thousand tons and production method thereof
A production method and broken wire rate technology, applied in temperature control and other directions, can solve problems such as insufficient compensation for surface defects and low plasticity of wire rods
Active Publication Date: 2022-05-03
武汉钢铁有限公司
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- Abstract
- Description
- Claims
- Application Information
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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
Method used
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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 grade 82 cord steel with a rough drawing broken wire rate of less than 3 times per thousand tons and a production method thereof, which belongs to the technical field of steel preparation. The method includes: molten iron desulfurization → converter smelting → argon blowing → LF furnace treatment → square Billet continuous casting → billet heating → high-speed wire rolling → Stelmore controlled cooling → coil collection; rapid cooling treatment above 650 °C can ensure sufficient supercooling and avoid abnormal cementite precipitation; at 650 °C Post-slow cooling can prolong the growth time of pearlite, making the pearlite lamellar spacing larger, and the oxide scale thicker and denser. The large distance between pearlite sheets can ensure the strong plasticity of the wire rod, and the thick and dense oxide scale can improve the peeling integrity of the oxide scale during the rough drawing process, and avoid the surface of the wire rod caused by the adhesion of fine oxide scale on the rough pulley. Scratch to ensure the surface quality of the wire rod.
Description
technical field [0001] The invention belongs to the technical field of steel preparation, and in particular relates to 82-grade cord steel with a rough drawing broken wire rate lower than 3 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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IPC IPC(8): C22C33/04C22C38/02C22C38/04C22C38/06C22C38/18C22C38/20C22C38/24C22C38/26C22C38/28C22C38/40C22C38/42C22C38/46C22C38/48C22C38/50B21B37/74C21C7/064
CPCC22C33/04C22C38/02C22C38/04C22C38/18C22C38/06C22C38/20C22C38/26C22C38/24C22C38/28C22C38/40C22C38/42C22C38/48C22C38/46C22C38/50C21C7/0645B21B37/74
Inventor 鲁修宇仇东丽张贤忠朱冬梅张向亮
Owner 武汉钢铁有限公司