In this wave of bulls standing at 4000 points, the new energy vehicle concept stocks performed outstandingly. Behind the new energy vehicles is a large wave of industrial chains that are being shaken. At present, Dalian is accelerating the construction of a new energy vehicle vehicle cluster, including components, batteries, cables, electronics and other industries will be shaken.
　　
Car prices increase efforts to develop new energy vehicles
In 2014, Dongfeng Nissan completed the production of the entire vehicle to make Dalian a veritable automobile city. The reporter was informed that six vehicle manufacturers that have entered Dalian have already stepped up efforts to develop new energy vehicles. Including BYD pure electric buses, Brilliance special vehicles, FAW buses (Dalian) Co., Ltd. and other vehicle companies will focus on the development of pure electric buses, airport shuttle buses, school buses, buses, agricultural vehicles and other new energy commercial vehicles. Chery and Dongfeng Nissan may also produce new energy passenger vehicles.
According to information from the Dalian Economic and Trade Commission, Dalian is currently the leading domestic city for new energy vehicle technology. Dalian will also continuously increase the R&D production capacity of new energy auto parts. The city will be driven by pure electric power as the main strategic direction, and will enhance the R&D and production capabilities of core components such as batteries and battery materials, hybrid electric motors, engine control, and powertrain control.
At present, research institutes related to new energy vehicles in this Municipality include the National Engineering Research Center of Xinyuan Power Fuel Cell and Hydrogen Source Technology, the Key Laboratory of Power Control and Vehicle Technology for Liaoning Province Energy Saving and New Energy Vehicles, Dalian Institute of Chemical Industry, etc. Strive to make breakthroughs in the fields of fuel cell systems, hybrid electric motors and engine assemblies, and electric control technologies for pure electric vehicles. Significant progress has been made in the development of proton exchange membrane fuel cells. This will instigate a large wave of new energy economies.
At present, there are more than 200 auto parts enterprises in this city, including a number of parts and components companies such as batteries, motors and control systems for new energy vehicles. The output value can reach 10 billion yuan.
Leasing electric vehicles to change profit model
Deng Xue, chief analyst of Haitong Securities New Energy Vehicles, believes that the emergence of a leasing model has shaken up the support for new energy vehicles. Therefore, the demand for new energy vehicles can be said to be explosive growth.
Deng Xue said that on November 5th last year, the Jiading Park of Shanghai's Zhangjiang National Independent Innovation Demonstration Zone announced that it would test the time-sharing mode of electric vehicles in the park to further reduce the use threshold of electric vehicles. This is the first domestic pilot-owned electric vehicle "taxis" pilot. At present, there are 400 electric vehicle licenses in the park for time-share leasing. The first batch of pilot models include the GM Chevrolet and Roewe e50.
Deng Xue said, “The time-sharing mode is suitable for the promotion of new energy vehicles because most of the new energy vehicles currently have limited battery life, which is suitable for time-share leasing mainly based on short-haul demand, and through this flexible 'test' Driving, consumers can also experience electric cars at a low cost. This form of breakthrough has already made supply of new energy vehicles begin to exceed demand. With the improvement of related facilities, electric vehicles can also obtain better competitiveness in private consumption. Benefited from the dual support of "national supplement + land compensation", new energy vehicles have obvious economic advantages during the life cycle.
Explosive growth in battery and cable demand
On the website of the Ministry of Industry and Information Technology, we can see that, thanks to the development of new energy vehicles, the annual output value of China's battery industry will exceed 100 billion yuan. The demand for batteries in China will show an upward trend in the next few years, and the battery industry has huge market opportunities. The reporter was informed that there are several companies in the city that research or produce batteries for new energy vehicles. Among them, the hydrogen fuel cell of Dalian Xinyuan Power Co., Ltd. has begun to provide support for the domestic industrialization of fuel cell vehicles.
New energy vehicles will also shake the automobile cable market back to life. In the electric car, the charging pile is the most essential part. Deng Xue, chief analyst of new energy vehicles, said that at present, the development of charging pile cables in China is far from Europe and the United States and is still in its infancy. However, starting this year, the country has strongly promoted the development of new energy vehicles. At present, it has formed a supporting charging station facility construction plan, and the development of charging pile cables will be progressing by leaps and bounds. At present, construction plans for charging piles have been proposed throughout the country, including investments in land acquisition, etc. The investment for charging pile construction in China will exceed RMB 60 billion in the next two years, of which the purchase budget for charging pile equipment will be RMB 12 billion. The scale of investment greatly exceeds market expectations. The construction of charging piles will also usher in the peak. The total number of charging piles is expected to reach 100,000 this year, compared with only 19,000 in the same period of last year.
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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