Graphite Powder soft, dark gray; greasy feeling, can contaminate the paper. Hardness of 1 to 2, along the vertical direction with the increase in the hardness of the hardness can be increased to 3 to 5. Specific gravity of 1.9 to 2.3. In the isolated oxygen conditions, the melting point of more than 3000 ℃, is one of the most resistant minerals. At room temperature, the chemical properties of Graphite powder is relatively stable, insoluble in water, dilute acid, dilute alkali and organic solvents; materials with high temperature conductive properties, do refractory materials, conductive materials, wear-resistant lubricating materials.
Graphite powder is widely used, according to its different use, we can be divided into the following categories of graphite powder
1. Scale graphite powder
Flake Graphite powder is the most widely used, but also processed into other graphite powder of the original material, scaly graphite powder specifications from 32 to -12000 mesh range, scaly graphite powder toughness is good, with good thermal conductivity and corrosion resistance, can be used as refractory Materials, wear-resistant lubricating materials, conductive materials, casting, Fansha, die and high temperature metallurgical materials
2. Colloidal Graphite powder
Colloidal graphite is formed by the average dispersion of graphite particles below 2u meters in an organic solvent. Colloidal graphite is a viscous suspension of black filaments. Colloidal graphite powder with high quality Natural Flake Graphite performance, in high temperature conditions with special oxidation resistance, self-lubricating and plasticity, at the same time with good conductivity, thermal conductivity and adhesion, mainly used in sealing, metallurgical stripping and other industries
3. Ultrafine graphite powder
Ultrafine graphite powder specifications are generally between 8000 mesh -10000 mesh, mainly used in powder metallurgy release agent, the production of graphite crucible, the battery anode and make conductive materials additives
Nano-graphite powder main specifications for the D30 50 100 400 nm, nano-graphite powder process is more complex, low production rate, so relatively high prices, mainly used in anti-corrosion coatings, lubricants additives, grease additives, precision graphite seal And other industries, in addition, nano-graphite powder in scientific research institutions also has a high application value
5, High Purity Graphite powder
Graphite Powder Graphite Powder,Nano-Graphite Powder,Graphite Carbon,Carbon Brush For Graphite Powder Fengcheng Ruixing Carbon Products Co., Ltd , http://www.lnfcrxts.com
China's machine tool industry's total industrial output value has jumped from the third place in the world to the first place, becoming the world's largest machine tool producer. According to statistics, since 2010, the growth rate of production and sales of China's machine tool industry has been above 40%. It is expected that the compound growth rate of the machine tool industry will be 25% to 30% in the next five years.
The continuous growth of domestic consumer demand has opened up a broad market for machine tool manufacturing, providing opportunities for development, but at the same time it has also raised challenges. The number of manufacturing units in China is extremely large. Although the advantages are obvious, the weaknesses are also prominent, and the machine tool industry is even more important. At present, the technical level of China's machine tool industry is mostly in the middle and low-end. The "12th Five-Year Plan" requires that the machine tool industry must develop at a high level, and use technological innovation as a means to enhance the level of management innovation and move toward modernization and high-end.
In the machine tool industry, the development of welding technology has been developed with the application of welding structure of machine tool products. Metal cutting machine tools, forging machinery and casting machinery products are the main fields of welding technology application in the machine tool industry. Welding technology has also gradually developed into the leading technology in the machine tool industry, which is mainly reflected in the following aspects:
Some key enterprises have established welding workshops or metal structure factories with a certain scale, and established a complete welding management system, and absorbed the welding process standards of imported products.
The welding process has been perfected, from a single processing technology to a complete set of emerging comprehensive engineering technologies from raw material pretreatment, cutting blanking, forming, welding, post-weld inspection and post-weld treatment.
CNC precision cutting and computer programming nesting technology has been applied.
Advanced and efficient new processes such as CO2 gas and argon-rich gas shielded or submerged arc welding have been promoted.
X-ray inspection and ultrasonic non-destructive inspection are widely used to stabilize the intrinsic quality of the weld.
The new vibration aging process has been promoted to achieve the purpose of reducing and homogenizing the residual stress of the welded structure, reducing the deformation of the welded parts and stabilizing the accuracy.
At present, the main welding techniques applied in the machine tool industry have the following aspects: application of steel plate pretreatment technology; application of numerical control cutting technology; application of high efficiency welding technology such as gas shielded welding: at present, high efficiency welding technology such as gas shielded welding, It has been widely used in machine bed, gear, eccentric body, rocker shaft, cylinder block, pipe flange and casing which are not processed after welding. It has become one of the main processes of welding in the machine tool industry; vibration aging technology application Application of welding automation and mechanization technology: In addition to CO2 semi-automatic welding, the welding automation of machine tool industry is mainly embodied in the application of submerged arc automatic welding, mainly used in the welding of steel plates and the barrel welding of pressure vessels; propane energy-saving and environmental protection Application of cutting gas; application of non-destructive testing technology.
With the increasing application of welding structures for machine tools, welding by casting, welding by forging, and welding by cutting have become the general development trend of machine tool manufacturing, and machine tool manufacturing is inseparable from welding. At present, the welding technology of the machine tool industry is also developing in an efficient and automatic direction.
Although the numerical control rate of the output of China's machine tool industry has increased, the overall numerical control rate is still lower. Compared with the level of 70% in developed countries, there is still room for improvement. I believe that with the intensity of China's "structural structure" Constantly increasing, the numerical control rate of machine tools in China will be significantly improved. It is also imperative to strengthen the management capabilities of the majority of machine tool enterprises and accelerate the process of informationization.
"Cloud computing" is the hottest word in recent years. All walks of life are trying to find a way to move closer to it. The machine tool industry is no exception. Using cloud computing companies can save costs and easily realize data and application sharing between different devices. Compared with traditional application platforms, cloud computing platforms have the advantages of powerful computing power, storage capacity, diverse services, and high cost performance. Nowadays, cloud computing has been accepted by most enterprises, and cloud applications have begun to spread at home and abroad. As an important industry in China, machine tool enterprises can only be invincible if they dare to break the traditional constraints, be brave in innovation, and be willing to try. .
New technology pushes the machine tool industry to high-end
Editor's note: At present, the technical level of China's machine tool industry is mostly in the middle and low-end. The "Twelfth Five-Year Plan" requires that the machine tool industry must develop at a high level, and use technological innovation as a means to enhance the level of management innovation and move toward modernization and high-end.