What are the advantages of steel strand – news

What are the advantages of steel strand – news

1. Unique manufacturing process of steel strand: horizontal continuous casting production process is adopted. In the continuous casting process, when the electrolytic copper is heated to 1200°C, the copper bonding surface forms an alloy coating, and the bimetallic interface is completely firmly bonded. The steel strand realizes the ductile metallurgical welding of copper and steel and becomes a single composite body, which can be like Just like a single metal, it can be stretched at will, and there will be no breakage, peeling, cracking, etc.

2. Steel stranded wire has better corrosion resistance: there is no residue inside the bimetal, and the corrosion resistance is better. The horizontal continuous casting process uses high-temperature smelting, and the residue overflows the copper surface after calcination, and will not remain in the copper-clad rigid conductor, so there will be no corrosion inside. When flat steel or building foundation is used as a grounding body, the reliability of the stranded wire grounding device is affected by poor corrosion resistance. The grounding body adopts galvanized angle steel (round steel) to slow down the corrosion of steel. But because zinc is more active than steel, zinc corrodes faster than steel. Due to the angle between the galvanized layer and the soil, continuous corrosion changes, poor stability, and short service life (generally less than 5 years). The resistance value needs to be checked every year, which requires a lot of work.

Steel products made of multiple steel wires are called steel strands, which are often used as load-bearing cables, pull wires, reinforcing cores, prestressed materials, cables, grounding wires, etc., and are widely used in bridges, electric power, water conservancy, construction, and road fences. And many other engineering fields.

1. Classification of steel strand

Steel strands can be classified according to structure, coating material, application, material characteristics, etc. Common classification methods are divided into prestressed steel strands, galvanized steel strands, unbonded steel strands, etc.

2. Steel strand production process

The manufacturing process of steel strand is divided into three parts:

One part is made of monofilament. Usually stainless steel wire rod, high-carbon steel or low-carbon steel wire rod and other raw materials are used for cold-drawn processing to obtain monofilaments of corresponding specifications. If coating is required, the monofilament is coated.

The second part is the production of steel strands. The produced monofilaments are twisted into steel strands of corresponding specifications with a stranding machine, and the prestressed steel strands are stabilized after forming.

The three parts are packaging molding. In order to facilitate transportation and use, it is usually shipped in two packaging forms: shaftless rollers and spools.