Recently, the aluminum-clad steel-core aluminum strand series products independently developed and produced by Anhui Litong Rare Earth Steel Cable Co., Ltd. (hereinafter referred to as "Litong Rare Earth Steel Cable") have been successfully applied to multiple key power transmission projects with their excellent comprehensive performance and wide adaptability, helping the construction of green power grids and demonstrating the technical strength and craftsmanship of domestic steel cable manufacturing enterprises.
As a core consumable in the field of power transmission, aluminum-clad steel-core aluminum strand is composed of aluminum-clad steel wire as the reinforcing core and hard aluminum wire stranded. It combines the high strength of steel and the excellent electrical conductivity of aluminum, making it an ideal choice for erecting high-voltage and ultra-high-voltage power transmission lines. Compared with traditional steel-cored aluminum strands, the aluminum-clad steel-core aluminum strands produced by Litong Rare Earth Steel Cable have significant advantages: 5% lighter weight, 2-3% higher current-carrying capacity, 1-2% smaller sag, 4-6% less power loss, excellent corrosion resistance and greatly extended service life. They are especially suitable for laying in harsh environments such as coastal areas, saline-alkali flats and industrial pollution areas.
Based on years of technical accumulation and innovative research and development, Litong Rare Earth Steel Cable strictly follows the implementation standard GB/T 1179-2017 and has established a full-process quality control system. Starting from the selection of high-quality raw materials, it strictly tests aluminum ingots and steel wires to ensure that the base material performance meets the standards; in the production process, it adopts advanced cladding and stranding technology, precisely controls various parameters to achieve close combination of aluminum layer and steel core, and eliminates problems such as delamination and cracking; before leaving the factory, the finished products undergo a number of strict tests including tension, bending and salt spray corrosion to ensure that each batch of products meets national and industry standards and adapts to the needs of various complex power transmission scenarios.
At present, this series of products have been successfully applied to multiple domestic 500kV high-voltage power transmission lines and local infrastructure construction projects, including line laying under special geographical conditions such as across rivers and valleys. With the advantages of stable performance, convenient erection and maintenance, they have won high recognition from construction units and power grid enterprises. Its energy-saving and consumption-reducing characteristics not only reduce the operation cost of power transmission lines, but also conform to the national strategic requirements of energy conservation, emission reduction and green development, providing strong support for building green power transmission lines with "maximized efficiency, resource conservation and environmental friendliness".
The person in charge of Litong Rare Earth Steel Cable said that the company has always adhered to the development concept of "innovation-driven and quality-oriented", and has been deeply engaged in the steel cable manufacturing field for many years. It will continue to increase the R&D investment in high-end products such as aluminum-clad steel-core aluminum strands, integrate the advantages of rare earth alloy technology, optimize product performance, expand application scenarios, and at the same time promote products to the global market relying on the advantages of self-operating and acting as an agent for the import and export of various commodities and technologies, helping the high-quality development of the power transmission industry and contributing more to the national infrastructure construction.
The wide application of aluminum-clad steel-core aluminum strands this time not only demonstrates the product strength and technical advantages of Litong Rare Earth Steel Cable, but also provides valuable practical experience for the transformation and upgrading of the domestic steel cable manufacturing industry, promoting the steady development of China's power transmission line consumables towards high efficiency, energy conservation and durability.