Abstract
It is a well-known fact that to manufacture an automobile tire more than 200 different materials are used, including high-carbon steel wire. In order to withstand the affecting forces, the tire tread is reinforced with steel wire or other products such as ropes or strands. These ropes are called steel cord. Steel cord can be of different constructions. To ensure a good adhesive bond between the rubber of the tire and the steel cord, the cord is either brass-plated or bronzed. The reason brass or bronze is used is because copper, which is a part of these alloys, makes a high-strength chemical composition with sulfur in rubber. For steel cord, the high carbon steel is usually used at 0.70–0.95% C. This amount of carbon ensures the high strength of the steel cord. This kind of high-quality, unalloyed steel has a pearlitic structure which is designed for multi-pass drawing. To ensure the specified technical characteristics, modern metal reinforcing materials for automobile tires, metal cord and bead wire, must withstand, first of all, a high breaking load with a minimum running meter weight. At present, reinforcing materials of the strength range 2800–3200 MPa are increasingly used, the manufacture of which requires high-strength wire. The production of such wire requires the use of a workpiece with high carbon content, changing the drawing regimes, patenting, and other operations. At the same time, it is necessary to achieve a reduction in the cost of wire manufacturing. In this context, the development and implementation of competitive processes for the manufacture of high-quality, high-strength wire as a reinforcing material for automobile tires is an urgent task.
Highlights
Accepted: 20 August 2021Over the past, relatively short, time, the range of reinforcing materials for car tires has undergone significant change
The aim of this paper is to describe the peculiarities of the manufacturing process of the high-carbon steel wire which is used as the reinforcing material for automobile tires
Products made of modern materials can be processed technologically in a number of different ways
Summary
Relatively short, time, the range of reinforcing materials for car tires has undergone significant change. At the input stage of the technological process of manufacturing wire for reinforcing materials for automobile tires, there are main and auxiliary materials (high-carbon steel wire rod, copper and zinc anodes, etc.), and at the output of the process there is the cold-deformed (brass plated, bronzed) wire. Patenting can be a transitory operation used for the formation of the final properties of the wire; brass plating to ensure the adhesion of the metal cord to rubber; finishing drawing; laying of the metal cord; annealing, processing in alternative deformation (if necessary for bead rings of tires). The technological scheme for brass-plated, high-carbon steel wire with high strength for steel cord is presented, as are the range of diameters of the processed wire. The implementation of these technological schemes (see Figures 5 and 6) at the industrial scale makes it possible to improve the competitiveness of the manufactured high-strength steel wire for cord [12]
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