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Improved method for producing steel cords

A production method and technology of steel cords, applied in the field of steel cords, to achieve the effects of reducing volatilization, improving pickling effect, and ensuring thorough cleaning

Active Publication Date: 2017-12-08
SHANDONG DAYE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although domestic radial tire production continues to increase, the growth in demand for its steel cord is not unlimited, and fluctuations in the export market, the increase in the proportion of retreaded tires, and the application of new process materials will have a potential impact on the market. Domestic steel cord Enterprise expansion should be cautious

Method used

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Experimental program
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Embodiment Construction

[0014] An improved steel cord production method, comprising the following steps:

[0015] Step 1. Raw material wire rod: use high-strength grade steel cord wire rod, with carbon content of 0.85%, manganese content of 0.4%, sulfur content of 0.01%, phosphorus content of 0.01%, steel cord wire rod Φ5.5mm; Step 2. Wire rod pretreatment: The qualified steel cord wire rod is mechanically descaled and rinsed, and then alternately electrolytic pickling, rinsing, hot water washing, boron coating, drying, and coating after drying. Uniform borax coating, and then put it on the large I-shaped wheel of Φ1000mm, the take-up speed is 2m / s; Step 3, rough wire drawing: the surface-treated steel cord wire rod is pulled by the pay-off frame of the large I-shaped wheel On the multi-head linear wire drawing machine, it is drawn to Φ2.05mm~3.60mm after different passes, of which Φ2.05mm steel wire is directly used for high-strength semi-finished steel wire before electroplating, and the rest of Φ2...

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PUM

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Abstract

The invention discloses an improved method for producing steel cords. The improved method for producing the steel cords comprises the following steps that step 1, a high-strength steel cord coil rod serves as a raw material coil rod, the carbon content is 0.85%, the manganese content is 0.4%, the sulfur content is 0.01%, the phosphorus content is 0.01%, and the diameter phi of the steel cord coil rod is 5.5mm; step 2, the coil rod is pre-treated, specifically, descaling, washing, electrolytic pickling, washing, hot water washing, boron coating and drying are conducted; step 3, coarse wire drawing is conducted; step 4, middle wire is heat-treated; step 5, middle drawing is conducted; step 6, a finished product is subjected to heat treatment and heat-diffusion brass plating; step 7, detecting is conducted, mechanical performance which comprises tensile strength, extension, bending, torsion and the strength declining rate after diffusion is detected; step 8, fine drawing is conducted; step 9, single twisting forming and double twisting forming and outer winding are conducted; and step 10, packaging and encasing are conducted. According to the improved method for producing the steel cords, improving of the adhesion and the gumming rate of the steel wire and rubber after vulcanization are facilitated, and the quality of a tire is improved.

Description

technical field [0001] The invention relates to a steel cord, in particular to an improved steel cord production method. Background technique [0002] Steel cord is the main skeleton material of the tire. It is composed of two or more steel wires, or a structure formed by a combination of strands or strands, and is mainly used in all-steel radial tires. The carcass and belt layer of the carcass and the belt layer of the light-duty radial tire and the car radial tire are the most extensively developed products in the rubber skeleton material, and are also the most difficult products to produce in metal products. [0003] Steel cords are developed with the development of radial tires, which in turn are companions of the automobile industry and highways. With the development and changes of the global economy and the strong drive of my country's economic development, in recent years, the application and extensive metal wire products in my country's key fields of national econom...

Claims

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Application Information

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IPC IPC(8): B21C37/04C22C38/04C25D3/38C21D1/46C25F1/04C25D3/22C25D5/50
CPCB21C37/042B21C37/047C21D1/46C22C38/04C25D3/22C25D3/38C25D5/50C25F1/04
Inventor 李文军
Owner SHANDONG DAYE
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