Magnesium alloy application in lighting products

In recent years, the application of magnesium alloys in LED lighting products has become a new trend. A number of magnesium alloy processing companies have started mass production of magnesium alloy LED products and profit from them. LED will become a new growth market for magnesium alloys.

Magnesium alloy components used in the field of LED lighting are mainly street lamp housings and lamp holders, lamp tube profiles, downlight housings, bulb lamp housings, tunnel lamp housings, and LED heat dissipation modules. Including magnesium alloy die castings and profiles, surface treatment using fluorocarbon spray, spray and anodizing. Leading domestic magnesium alloy companies Shandong Yinguang Haoyuan Light Metal Precision Forming Co., Ltd., Beijing Guangling Elite Science and Technology Co., Ltd., and Shandong Huashengrong Magnesium Industry Co., Ltd., the recent orders for LED magnesium alloy components have increased significantly, and the production lines of these companies have increased. Both are in mass production, and the product types are also diverse. Among them, there are many products exported to Japan, Taiwan, and the United States, and domestic orders have started to increase.

The light metal research institute initially estimates that in light of exports, China's LED industry may use more than 5,000 tons of magnesium alloy in 2012, and it may exceed 40,000 tons in 2015. This will be a rare opportunity for the magnesium industry.

It is understood that energy saving is an important issue for us in the context of rising global energy shortages. LED is recognized as the most important feature in terms of its high efficiency, energy saving, long life, versatility, and environmental protection. The most promising fourth-generation green light source. With the continuous advancement of low-carbon, energy-saving and emission-reduction policies by the state, the LED industry has encountered great opportunities for development. At present, the LED industry at home and abroad is developing rapidly, and it is ushering in a round of popularization and popularization in the world. The 21st century will enter the era of new lighting sources represented by LEDs. Its application will completely change the traditional concept of existing buildings in lighting design, lighting design. As application work progresses, new lighting concepts, ways and means of implementation will be created. Therefore, the in-depth study of architectural lighting design specifications, power supply systems, drive technology, structural design, and thermal design technologies will play a key role in promoting the application of LEDs in architectural lighting.

According to forecasts by authoritative agencies, global LED general lighting will increase from 1.9% in 2011 to 9.5% in 2014.

The Chinese government has also begun to implement green lighting projects. In 2011, the promotion of efficient lighting products continued to be carried out to promote LED lighting application demonstration projects. In different climatic conditions, 20 LED indoor lighting application projects, 15 LED street lighting application projects and 15 LED tunnel lighting application projects were selected to demonstrate The list of bidders for the tender includes three categories of LED road/tunnel lights, LED downlights, and reflective self-ballasted LED lights, involving 28 companies.

It is reported that the National Development and Reform Commission has issued a roadmap for phase-out of incandescent lamps in China and decided to gradually ban the import and sale of incandescent lamps for general lighting in stages in accordance with the power level from October 1, 2012. First, sales and imports of general lighting of 100 watts and above are prohibited. With incandescent lamps. From October 1, 2014, it is forbidden to sell and import incandescent lamps for general lighting of 60 watts or more; according to energy efficiency standards, it is prohibited to produce, sell, and import inefficient halogen lamps with luminous efficacy lower than the energy efficiency limit value. From October 1, 2016, it is prohibited to sell and import incandescent lamps for general lighting of 15 W or more. Through the implementation of the road map, it will effectively promote the healthy development of China's lighting industry and achieve good energy-saving and emission-reduction effects. It is expected that the output value of lighting industry can be increased by more than 8 billion yuan, and 15,000 new jobs will be created to form a new year. Electricity capacity of 48 billion kwh, annual reduction of carbon dioxide emissions of 48 million tons.

The Chinese government also actively promotes the healthy development of the LED lighting industry. It is understood that the Ministry of Finance, the National Development and Reform Commission, and the Ministry of Science and Technology have organized and launched the 2012 LED Lighting Financial Subsidy Promotion Project Bidding. Subsidy products include indoor lighting products - LED downlights, reflective self-ballasted LED lights and outdoor lighting products - LED street lights, LED tunnel lights. The subsidy standard is for each high-efficiency lighting product for bulk users, and the central government subsidizes 30% of the supply price of the bid-winning agreement. The person in charge of the National Development and Reform Commission stated that the development of such work has promoted energy conservation and emission reduction, optimized product structure, expanded consumer demand, led to the development of the enterprise, promoted cost reductions, and users benefited, and at the same time enhanced the awareness of energy conservation in the entire society.

Therefore, relevant experts expect that China will become the fastest growing region using LED lighting, and its share in the lighting market will increase from 11% in 2011 to 24% in 2014. The trend of LED lighting replacing traditional incandescent lamps and energy-saving lamps has become a consensus, and LED manufacturers will face a very large market. On the other hand, foreign LED giants are all aiming at China's LED market and actively carry out market layout. In the next 3 to 5 years, the era when LED lighting really replaces traditional lighting will come. LED lighting industry is a technology-intensive and labor-intensive industry, more suitable for China's national conditions. If China can insist on independent innovation in chip preparation and independent packaging technology, it is entirely possible to realize the leap-forward development of China's LED lighting industry. China is a major producer of lighting sources and lamps in the world, but it is mainly low-end products. It is of great significance to develop LED lighting and enhance the international competitiveness of the industry. At present, China's LED industry has initially formed four major regions: the Pearl River Delta, the Yangtze River Delta, Beijing and Dalian.

The cost and heat dissipation issues have always been two major problems that have plagued LED development and popularity. In addition to the quality of the power supply and the lamp itself, the heat dissipation problem is the most prominent point. As we all know, LED lighting for road lighting must have high illumination in order to achieve effective illumination, and to achieve high illumination, it is necessary to increase the power of the product. Increasing the power will inevitably increase the heat energy. If the heat cannot be dissipated in time, it will inevitably lead to Light fades. Relatively speaking, the quality of the LED lamp itself is no better, the heat problem is not solved, life is difficult to protect, and eventually the light failure causes dead lights. Because the LED light decay and life have a direct and decisive relationship with the working temperature of the LED. LED street lights have large power, high heat, and long working hours. The problem of light failure will be very prominent in use. To do a good job of high-power LED street lamps, we must first do a good job of thermal design lamps, do not solve the problem of good heat, LED can not reflect the advantages of long life, if the LED can not achieve the advantages of long life, all advantages will be burned, no way to talk about From a substantive point of view, controlling light decay and ensuring long life are more important than saving energy. Therefore, the core issue of doing high-power LED lamps is to solve the problem of heat dissipation and control of light failure. The problem of heat dissipation is a problem that must be solved in high-power LED street lamps. In addition to the structural design, the choice of materials for the LED housing and the heat sink assembly is also the key to solving the LED heat dissipation problem. Magnesium alloys are gradually becoming the best LED component material.

The advantages of magnesium alloys for LEDs are:

1, good heat dissipation. Although the thermal conductivity of magnesium alloy is not as good as that of aluminum alloy, its residual value of heat is better than that of aluminum alloy, so its comprehensive heat dissipation capacity is similar to that of aluminum alloy and can effectively dissipate internal heat to the outside. Magnesium alloys are used on the housing and the heat sink to allow the housing of the appliance to be free of thermal vias. In terms of thermal conductivity, pure magnesium has a thermal conductivity of 167 w/m. k, the thermal conductivity of pure aluminum at room temperature is 238w/m. k, it can be seen that the thermal conductivity of the magnesium alloy is about 70.1% of the aluminum alloy, and the specific gravity is about 64.07% of the aluminum alloy. It can be inferred that the magnesium alloy with the same weight will have better thermal conductivity than the aluminum alloy. The heat dissipation coefficient of magnesium alloy is 0.29 cm? /s, slightly higher than the heat dissipation coefficient of aluminum alloy 0.244 cm? /s. From the alloy point of view, the thermal conductivity of magnesium alloy AZ31B is 182.3 w/m. k; Magnesium alloy AZ91D is 157 w/m. k; aluminum alloy A380 is 100 w/m. The k,6063 type is 201 W/m. K.

2, lightweight. In order to achieve environmental protection, energy conservation and emission reduction, there are more and more accessories on the road light poles, and fan blades, solar panels and the like continuously increase the load of the light poles. The use of the above-mentioned accessories made of magnesium alloy profiles not only can effectively reduce the weight and reduce the load, but also can minimize extra damage.

3, electromagnetic shielding performance is better, especially suitable for use as the shell of electronic products that emit electromagnetic interference, covers, can save the need for other materials surface electromagnetic shielding film plating process; for LED indoor lighting products, can be effective Reduce the electromagnetic harm to the human body, used in LED outdoor lighting products, can reduce the impact of electromagnetic signals on communications.