The essence of intelligent lighting is based on the electronic and networked lighting system, which not only realizes the intelligent control of the lighting system, but also realizes the basic functions of automatic adjustment and scene lighting. It is also an entrance to the Internet, thus generating more high value-added services. . The essence of intelligent lighting is based on the electronic and networked lighting system, which not only realizes the intelligent control of the lighting system, but also realizes the basic functions of automatic adjustment and scene lighting. It is also an entrance to the Internet, thus generating more high value-added services. . Home is the breakthrough of intelligent lighting Due to the low technical threshold of the LED industry, companies can easily enter this market to compete. According to statistics, there were as many as 20,000 LED companies in 2014, which undoubtedly led to the strategy of various companies to win the market through price. The price war was fierce at one time, and the result of fierce competition was that after only one year, 4,000 companies have withdrawn from the market. In the future, the LED lighting industry is still overcapacity. Domestic companies have already made LED products without profit. The major lighting families in Japan, the United States, Germany and other countries have announced their withdrawal from the manufacturing sector and differentiated competition with Chinese companies. In terms of differentiated competition, Philips should be the fastest and most successful one. The Philips smart home lighting product system represented by HUE has become the benchmark product in the field of smart home. From many domestic and foreign smart home products, more or less can see the traces of imitating Philips, and even the appearance is to copy HUE, which makes people very embarrassed. Smart home is not just a bulb that can dim, nor does it mean that adding an app is a smart home. As the entrance to the Internet, in addition to the basic functions of dimming and scene lighting, it is more important to equip the smart home with a platform system that connects to the Internet. From this perspective, only Philips and Xiaomi are actually entering the field of intelligent lighting. Huawei and several other companies, and the cross-border cooperation between the above-mentioned companies is also aimed at establishing a smart home ecosystem, and many of the lighting industry's trails are too formal. The smart city is emerging as a smart home and smart street light. It can be said to be two carriages driving intelligent lighting. ABI research shows that the global market size of projects and technologies that invest in and support smart city plans is expected to increase from $8 billion in 2010. More than $39 billion in 2016, with a total expenditure of $116 billion during the period. According to PikeResearch, global smart infrastructure investment will reach $108 billion in 2020, which means that the annual investment is 16 billion US dollars. Domestically, in the lead of national policy and the increasing competition in the lighting industry, many companies have begun to set up in the smart city field. Hefei Huayao Electronic Industry Co., Ltd., as a scientific research company under the Military Industry Research Institute, has a strong reserve and research resources foundation in the civilian products market. With more than 20 years of development and accumulation of key technologies, its own patents have reached 60. Multiple. In terms of basic industries, Huayao is a stable supplier of military products and industrial power. In recent years, Huayao has steadily advanced in many cutting-edge technologies including power communication, public safety, new energy, medical electronics, aerospace and high-energy physics. At present, Huayao has established stable and good partnerships with many Fortune 500 companies. Zhu Xing, director of Hefei Huayao LED product line, said that in recent years, with the warming of smart lighting, Huayao has also followed the pace of the times and developed a series of reliable dimmable power supplies. It is precisely in the LED related support to keep up, so that the promotion of smart cities has a substantial support. Since the trial of intelligent lighting in 2008, Hangzhou Yibo Gaoke Electric Co., Ltd. has continuously introduced lighting products with other functions in the field of civil lighting and public lighting to explore the development direction of intelligent lighting. Yu Qingsong, deputy chief engineer of Yibo Hi-Tech, mentioned that the smart city planning of Changxing County started in 2013 and introduced the lighting control system of Yibo Hi-Tech. So far, the three-phase renovation project has been carried out to realize the intelligence of all road lamps in Changxing. Control, real-time feedback of road lighting status, while saving power consumption and extending the life of lighting equipment, saving human resources and improving the information level of urban management. The currently completed intelligently controlled road lighting network provides a realistic platform for the experiments and post-implementation operations of the smart city functions that are now planned. Hangzhou Hongyan Electric Appliance Co., Ltd. is also one of the early companies involved in the field of intelligent lighting. The typical party room meeting room in the new building of the Ministry of Industry and Information Technology, Hangzhou G20 landscape project, is currently implementing the landmark building of Fosun Industrial in Shanghai Bund. Smart lighting solutions. Wang Micheng, president of Hangzhou Hongyan Electric Co., Ltd. believes that the current concept of smart lighting still needs to form a consensus. Smart lighting should be divided into two levels: one is single-grade, and the point-to-point realization of dimming and coloring is relatively primitive. The other is system-level, mainly scene and scene lighting. Energy saving and creativity are the main purposes. They are often integrated with electrical control and have high technical requirements. From the current situation of intelligent lighting technology, whether it is smart home or smart city, it is in the primary stage, and all enterprises are still in the state of exploration. Xiamen Zhichuang Energy Technology Co., Ltd. is a leading provider of products and solutions for smart cities and smart living. Zhang Limei, chairman of Zhichuang Energy, mentioned that the smart street light pole products that have been promoted recently are currently being popularized in the streetlight intelligent control project of Xiaolan Town, Zhongshan City, Guangdong Province and the Guizhou Kaili Smart Street Light Rod Project, except for the most basic on the streetlight pole. In addition to intelligent lighting control, it also has environmental monitoring, WIFI Internet access, video surveillance, advertising broadcast control, emergency call, traffic monitoring, broadcasting, manhole cover monitoring and charging pile function. Customers can customize different functions according to their needs. During the G20 meeting just recently, the smart streetlight system installed at Qianjiang Century City, where the G20 summit was held, showed the guests to the eight parties. How to use the streetlight pole as the carrier, big data, cloud computing, Internet of Things, geographic information, A new generation of information technology, such as the mobile Internet, is used as a driving force to establish a smart and sustainable urban development model, showing the world the huge development potential and prospects of smart cities. So far, there are 193 smart city pilots in China, and the demand for smart lighting products alone exceeds 10 million per year. The smart city is in its infancy. Experts estimate that in the next few years, the market for LED light sources in China will exceed 100 billion US dollars, while the current penetration rate of smart lighting in China is still less than 2%. Wisdom lighting is hot but difficult to land. At present, the enthusiasm of enterprises for intelligent lighting is unprecedentedly high, and there are some enterprises that take the opportunity to speculate and fish in the water, so that the wisdom lighting becomes hot. Compared with the upstream, the response of smart lighting is sluggish and forms a strong contrast. Wisdom lighting wants to land, there are still many problems to be solved. First, cross-border integration is difficult, and it is caught in the embarrassing situation of information islands. Even within the lighting industry, there is currently no systematically perfect standard for LED lighting itself, and smart lighting has attracted lighting, home, Internet companies and different government departments to join. The standard for smart lighting is more It is still chaotic, there are barriers between the various departments in the country, and there is no sharing mechanism between them. This situation is also one of the bottlenecks in building a smart city. Second, the imbalance between input and output makes it difficult for enterprises to make profits. According to statistics, China’s investment in smart cities has already exceeded 500 billion yuan. It is expected that investment will rise to 1.1 trillion yuan in the future. However, the current methods for building smart cities in China to solve financial problems are mainly EMC projects and PPP models. Through the government's entry into social capital, there are certain limitations in accessing funds. At this stage, companies involved in smart cities are mostly in the occupation of market share and acquisition of users. Since profits cannot cover the expenses of operating expenses of enterprises, there are few profitable players in the industry. Third, the product function is out of touch with the actual demand, and it is impossible to poke the user's pain point. The current home lighting is still based on the most basic dimming color, and is equipped with different forms of APP software, which makes simple dimming complicated. However, the lack of APP in life has increased, and users have gradually become resentful to APP. In the construction of smart cities, the smart street lamps as the basic carrier are also full of various functions, but the real humanized intelligent control and energy saving. The above is not a breakthrough. Fourth, the lack of product quality guarantees that enterprises are caught in a crisis of trust. At present, the construction of smart cities is mainly carried out through EMC or PPP mode, and the country, especially in the lighting industry, is involved in the field of intelligent lighting, most of which are small and medium-sized enterprises, lacking the technical accumulation and research and development, and the product quality is not guaranteed. This is also the most important part. From the current project, the quality of the products cannot meet expectations, which is already a serious problem. Other problems can be solved slowly, and once quality problems arise, the company may be blocked from the door of intelligent lighting forever. The lighting industry should return to the product and quality, which is the core and most basic thing of the enterprise. The most fundamental and core of enterprise competition is product and quality. Then, through the service and brand added value extended by the product, the company should pay attention to technology research and development and innovation, improve product quality and stability, and enhance brand awareness in marketing. Market influence, after-sales service, provide more convenient and effective services. Zhu Xing, director of Hefei Huayao LED product line, said that in the smart lighting boom, we are more about technology, R&D reserves, product strategy and direction adjustment, welcoming change, embracing change, and giving better play to corporate technology and R&D advantages. Good role service, do more real things for smart lighting.
Tungsten Carbide Roller
Tungsten carbide roller has characteristics of good wear resistance, high temperature red hardness, thermal fatigue resistance and thermal conductivity and high strength , have been widely used in high-speed wire rod, bar, rebar, seamless steel tubes, etc. Domestic production of tungsten carbide roller materials mostly WC- Co, WC- Co- Ni- Cr two series, and the content of Co, Co- Ni - Cr is in the range of 6wt% ~ 30wt%. From the use of perspective, tungsten carbide rollers has good mechanical properties, its flexural strength up to 2200 MPa or more, shock toughness up (4 ~ 6) × 10^6 J/ m^2, Rockwell hardness (HRA) is up to 78 to 90, widely in the high-speed wire rod rolling process, which is much higher than single-slot chilled cast steel or high speed steel rolls.Tungsten carbide is made of Tungsten Carbide Powder and binder phase (such as drilling, nickel, etc.), and then pressing and sintering, regardless of the conditions under cold rolled or hot rolled has excellent wear resistance, tungsten carbide rollers has been widely used in pre-finishing mill and finishing of high-speed wire rod currently. On the performance of tungsten carbide roller in hot-rolling wire rod , the material must meet the following requirements:
1. Sufficient anti-fracture strength;
2. Good abrasion resistance;
3. The smooth surface finish;
4. Excellent corrosion resistance, thermal fatigue, thermal cracking performance.
Tungsten carbide roller rings can working in bad conditions , small profile rolling (especially rebar rolling) process conditions is harsher than the high-speed wire rod, and therefore corresponds to the profile rolling ,tungsten carbide rollers recommend using high binder phase carbide.
Tungsten carbide roller material design
Pre-finishing all vehicles roller should ensure its high toughness, strength, rigidity and thermal conductivity, followed before considering its wear resistance. When designing each vehicles roller, pre-finishing materials should choose carbide grades of Co, Co- Ni- Cr binder content is high (greater than or equal to 25wt%) , requiring an average WC grain size of coarse (5μm ~ 6μm), to obtain a higher shock toughness, proper strength and hardness. For the finishing of the roller movements, particularly the last two rollers of the finish rolling, which suffered load is small, and high relative velocity of the material to be pressed (80 m / min ~ 120 m / min). In this case, the wear resistance of the roller to be the most important requirements, and must ensure the strength , timpact toughness and hardness of a reasonable match, so the binder of Co / Ni content ratio and the average grain WC control of particle size and other factors must have greater control in front of different pre-finishing rolling roll.
Tungsten carbide roller category
According to the structure of tungsten carbide rollers, it can be divided into solid tungsten carbide roller and composite tungsten carbide roller. Solid tungsten carbide rollers have been widely used in pre-finishing and finishing stands high speed wire rod mill (including fixed reducing the rack, pinch roller rack). Composite tungsten carbide roller is made of cemented carbide and other materials, and it can be divided into tungsten carbide composite roll rings and solid tungsten carbide composite roller. Tungsten carbide composite roll rings mounted on the roller shaft; solid tungsten carbide composite roller will be directly cast in the roll axis to form a whole, a large load is applied to the rolling mill.
Tungsten carbide roller production process control
Tungsten carbide rollers produced by powder metallurgy method, the key to its process control is the chemical composition of the material and the mixture was prepared, pressed molding, sintering and deep processing and other preparation process parameters.
1. Preparation of starting material (WC focus quality): As the WC raw material and quality control of the use of different levels of quality may fluctuate, resulting in adverse effects on microstructure.
2. Preparation of the mixture: Mixture preparation is the key to the production process of the roller, the roller of failure modes - trachoma, mainly generated by this procedure.
3. Pressing: roller pressing is an important process of the roller mill.
4. Sintering: roller sintering is to determine the final quality of the roller production processes, use of advanced low-pressure sintering technology, HIP sintering technology can greatly improve the performance of roller.
5. Deep processing: deep processing rollers have a greater impact on the quality and accuracy of the roller surface.
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