In recent years, Hunan Golden Dragon Group has taken scientific and technological innovation as the guide, actively captured the information on the development of the automotive industry today, and carried out scientific research on aluminum and copper, and achieved a series of results.

Cooperated with Hunan University to successfully develop automotive air conditioning flat tubes

Due to its strong plastic processing properties and strong corrosion resistance, in the past, automotive air-conditioning tubes basically used copper tubes. If aluminum alloy tubes were used, the weight of automotive air-conditioning equipment could be greatly reduced because the proportion of aluminum alloy was less than that of copper. /3 However, this flat wall has many thin holes and it is very difficult to process. Jinlong Group and Hunan University work closely together to solve the problem of optimal composition of alloy composition, horizontal continuous casting process, casting homogenization process, continuous extrusion process, A series of problems such as the influence of tensile-heat treatment process on the microstructure and performance of the aluminum alloy wire and the comprehensive evaluation of the reliability of the industrial production product have greatly improved the corrosion resistance of the flat tube. The minimum failure pressure of the blasting test is 12MPa, and the tensile strength of the product. More than 95MPa; Elongation rate is more than 28%; Inside and outside surfaces are smooth and clean; Pressure of hydraulic test is 5.3MPa, test time is 5 minutes without leakage; Salt spray test, grain size, low magnification, size and other items are in line with requirements Finally, it was successfully developed.

New products patented by two countries in the State Intellectual Property Office

According to expert reports: According to the calculation of the consumption of copper from 15 to 22 kg per vehicle, it is estimated that the automobile industry in China will consume about 200,000 tons of copper in 2015. However, there is a large gap between China’s copper production and the domestic market demand. More than 3 copper concentrates need to be imported from abroad. To this end, Jinlong Group has developed special automotive power cables to replace some of the automotive aluminum alloys for copper. The cable uses a thick copper-clad aluminum-magnesium alloy wire instead of the center conductor and the braided shielded wire. It has good conductivity, low density, good flexibility and simple processing. It can reduce the outer diameter of the conductor and reduce the weight of the conductor, saving the country a lot of shortages. The copper material effectively controls the release of electromagnetic waves generated when the cable transmits high current to the environment; it is resistant to high temperature and low temperature, oil resistance, fatigue bending, abrasion resistance, and has high strength and toughness; large current carrying capacity, low smoke and halogen free, Light weight and low cost.

With the continuous improvement of the level of automotive electrification, more and more electrical components are used. As a result, the space for laying wires and cables inside the vehicle is getting smaller and smaller. The scientific and technological workers in all countries in the world are reducing the weight, thickness, and size of wires and cables for vehicles. Scientific research was carried out on the aspect of size. Among them, copper-clad steel wire was used as a conductor for high-strength, low-voltage, and small-section vehicle wiring. Although it can achieve small size and high strength, it is scrapped and copper and steel are Separation has always been an unsolved problem. It is generally scrapped and disposed of directly. This is extremely unfavorable to the environment and wastes hard-earned copper resources. The patent developed by Golden Dragon Group solves this problem.

The patented product uses steel wire with proper wire diameter and softness as cable core, not only greatly improving the strength of the cable, but also reducing the size of the cable, achieving the purpose of reducing the weight and reducing the cost. The heat dissipation of the flat cable is obviously better than the same. The circular cross-section cable can reduce the diameter of the cable to a degree that is 15% to 20% lighter than that of the round cable. In addition, these materials are easy to process and have good recovery performance. Therefore, the cost of the cable is greatly reduced, and it is more important. Even after the cable is scrapped, it is easy to separate the copper layer and the steel wire layer, greatly reducing the burden on the environment, saving the copper material, and saving the cost.