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The development prospect of aluminium steel products and thinking

Information Source:Henan Huadong Cable Co., Ltd Release date:2014-03-27

At the beginning of the 90's, with the large-scale promotion of electrified railway construction state, the contact wire materials aluminum clad steel products began in Chinese was born, after 1-2 years after the trial, the domestic aluminum clad steel products completely replace the imported aluminum clad steel products. National electric power design department because of its superior performance, has been used in transmission lines.

The aluminum clad steel products with high strength, good corrosion resistance, electrical performance is better than that of galvanized steel wire etc.. Aluminum layer thickness can be designed according to the need of wire, a combination of a selective aluminum layer and the wire strength, has great design flexibility. According to Ministry of metallurgical industry of iron and Steel Research Institute in December 12, 1997 to produce salt fog test results show that: in the pH value of the environment of =7, aluminum clad steel wire and galvanized steel wire at the same time, after 317 hours of salt spray test, the corrosion rate of aluminum clad steel wire for 0.0062g/h. square meters, and the corrosion of galvanized steel wire rate for 0.5518g/h. square meters; in the pH value of the environment of =5, aluminum clad steel wire and galvanized steel wire at the same time, after 207 hours of salt spray test, the corrosion rate of aluminum clad steel wire for 0.01502g/h. square meters, and the corrosion of galvanized steel wire for 05553g/h. ㎡ rate. The experimental data show that, the aluminum clad steel products with galvanized steel wire can not compare the corrosion resistance ability.

Despite the current electrified railway contact line material has been made of aluminum clad steel products gradually changed to copper alloy products, but given the superior performance of the aluminum clad steel products, advantage in power line application significantly. As the main material OPGW basically is the aluminum clad steel products, good conductor wire with aluminum clad steel products, national key projects, coastal areas, large span preferred material is aluminum clad steel products. These phenomena, the aluminum clad steel compared with galvanized steel wire advantage, but not to like the galvanized steel wire are widely used, there are some limitations. It remains to be further to fully understand the aluminum clad steel products.

At present, the domestic ordinary line most materials are steel core aluminum stranded wire, aluminum clad steel core aluminum stranded in the proportion of the total amount of the shortage of 5%. Survey data show that, the aluminum clad steel products in the 14% conductivity product to replace the galvanized steel wire products, shows from the performance, performance of the 14% conductivity aluminum clad steel products basically can cover the galvanized steel wire, galvanized steel wire and has incomparable advantages in terms of stability; the material cost is close to two, the price of the products the difference can be controlled at 1000 yuan / ton. Therefore, the aluminum clad steel core aluminum stranded gradually replace the steel core aluminum strand will have good prospects for development.

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