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A production method and technology of steel cords, applied in the field of steel cords, to achieve the effects of reducing harm to human body, improving tire quality and improving pickling effect
Active Publication Date: 2019-05-28
SHANDONG DAYE
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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
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[0023] A method for producing steel cords, comprising the steps of:
[0024] Step 1. Raw material wire rod: use high-strength steel cord wire rod with a carbon content of 0.85%, a manganese content of 0.4%, a sulfur content of 0.01%, and a phosphorus content of 0.01%. The steel cord wire rod is Φ5.5mm;
[0025] Step 2. Wire rod pretreatment: The qualified steel cord wire rod is subjected to mechanical descaling and washing on the surface, followed by alternating electrolytic pickling, washing, and hot water washing, then boron coating, drying, and then closed at Φ1000mm On the large I-shaped wheel, the take-up speed is 2m / s;
[0026] Step 3. Rough wire drawing: The surface-treated steel cord wire rod is drawn to the multi-head linear wire drawing machine by the pay-off frame of the large I-shaped wheel, and drawn to Φ2.05mm~3.60mm through different passes, of which Φ2. 05mm steel wire is directly used for high-strength semi-finished steel wire before electroplating, and the r...
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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 a production method of the steel cord. 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 economy s...
Claims
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Application Information
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