The brass coated steel wires for steel cord are fine-gauge steel wires made from high-quality high-carbon steel wire rods as the base material through precise drawing and surface copper (or brass) coating processes. They are key semi-finished products for manufacturing the framework materials of radial tires and other rubber products. Their core function is to enhance the mechanical properties of rubber products and improve the wear resistance, fatigue resistance and safety of tires.
Main Applications
Smelting and Continuous Casting: The processes of hot metal pretreatment → converter refining → vacuum degassing → continuous casting are adopted to ensure the cleanliness of the molten steel.
Rolling and Heat Treatment: After rolling by a high-speed wire rod mill, a uniform sorbite structure is obtained through online heat treatment.
Drawing Process: The φ5.5mm wire rod is drawn into a thin wire with a diameter of φ0.15 to 2.0mm. During the process, the deformation amount and lubrication conditions need to be controlled to reduce surface defects.
Acidic Copper Plating: A copper sulfate plating solution is used to complete the deposition of the coating layer, ensuring that the coating is smooth without nodules.
3.Post-treatment:
Stranding and Shaping: The copper-coated steel wires are stranded into strands or ropes by a double twisting machine to form the final structure of the steel cord.
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