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Carbide Tool Knowledge Series No.1
Tool is used in the manufacture of cutting tools, also known as cutting tools. Generalized cutting tools include both cutting tools, including abrasive. The vast majority of the tools are machine-use, but there are hand-used. As the machinery used in the manufacture of cutting tools are basically used for cutting metal materials, the "tool" is generally understood as a metal cutting tool. Cutting wood with the knife is called woodworking tools.
Tool development in the history of human progress occupies an important position. China as early as 28 BC to the 20th century, there have been brass cone and copper cone, drill, knife and other copper tools. The late Warring States (the third century BC), due to master the carburizing technology, made of copper cutter. Drills and saws at the time were somewhat similar to modern flat drills and saws.
However, the rapid development of tools in the late 18th century, accompanied by the development of the steam engine and other machines. In 1783, the first system in France, Lenei milling cutter. In 1792, the United Kingdom of Mozley made tap and die. The earliest documentation of the invention of twist drills was in 1822, but it was not produced as a commodity until 1864.
The tool was manufactured with a high-carbon tool steel, allowing cutting speeds of about 5 m / min. In 1868, the United Kingdom's Moussheart made of tungsten alloy tool steel. In 1898, the United States and Taylor. Wright invented high-speed steel. In 1923, Germany's Schlötel invented cemented carbide.
In the use of alloy tool steel, the carbide cutting tool speed increased to about 8 m / min, using high-speed steel, but also increased more than twice, to the use of carbide, high-speed steel than with more than twice, Of the workpiece surface quality and dimensional accuracy is also greatly improved.
As the high-speed steel and carbide prices are more expensive, the tool appears welding and mechanical clamping structure. From 1949 to 1950, the United States began turning tools on the use of indexable blade, and soon applied to the cutter and other tools. In 1938, the German company to obtain on the ceramic cutting tool Dagusa patent. In 1972, the United States General Electric Company produced polycrystalline synthetic diamond and polycrystalline cubic boron nitride blade. These non-metallic tool materials allow the tool to be cut at higher speeds.
In 1969, the Swedish Sandvik steel mills to obtain by chemical vapor deposition, the production of titanium carbide-coated carbide blade patent. In 1972, the United States and the development of the Bangsha Raghulan physical vapor deposition method, in the hard alloy or high-speed steel cutting tools coated with titanium carbide or titanium nitride hard layer. Surface coating method to the matrix material of high strength and toughness, and the surface of the high hardness and wear resistance combined, so that the composite material has better cutting performance.
Vacuum heat treatment processing
Science and technology as the primary productive force, is the high-quality power of social and economic development, the application of new technology is also an obvious manifestation of the improvement of production efficiency.Vacuum heat treatment processing technology, mainly refers to the vacuum technology and heat treatment technology of new heat treatment technology, Vacuum heat treatment in which the vacuum environment refers to an atmosphere below the atmospheric environment, including low vacuum, medium vacuum, high vacuum and ultra-high vacuum, so the vacuum heat treatment is actually controlled atmosphere heat treatment. Vacuum heat treatment refers to all and part of the heat treatment process in a vacuum state, the vacuum heat treatment can achieve almost all conventional heat treatment can be involved in the heat treatment process, but the heat treatment quality is greatly improved. Compared with the conventional heat treatment, the vacuum heat treatment processing technology can achieve no oxidation, no decarburization, no carburization, can remove the surface of the workpiece phosphorus debris, degreasing degassing and other effects, so as to achieve the effect of bright surface purification.
Metal processing is an important research direction of material science, vacuum heat treatment process technology using the principle of metal in the vacuum state of the phase characteristics, and atmospheric pressure only 0.1MPa range of vacuum, the solid phase transition thermodynamics, kinetics do not produce What changes. In the development of vacuum heat treatment process, it is entirely possible under the principle of solid-state phase transition at atmospheric pressure, can refer to the atmospheric pressure under the various types of organizational change data. At the same time, in the vacuum degassing, can improve the physical properties of metal materials and mechanical properties, heating in a vacuum state, the metal surface of the workpiece will evaporate. Metal to achieve the required oxidation of the vacuum heating, surface purification, to achieve less non-oxidation and less non-off.
Vacuum heat treatment and controllable atmosphere is to keep pace with the application of a wide range of non-oxidation heat treatment technology, heat treatment is also the production of advanced degree of one of the main signs. Vacuum heat treatment can not only achieve non-oxidation of steel, no decarburization, but also the production of pollution-free and less distortion of the workpiece, therefore, it also belongs to the field of clean and precision production technology. At present, it has become an industrial mold can not be replaced in the production of advanced technology.
According to production experience, the distortion of vacuum heat treatment of the workpiece is only one-third of the heating bath quenching. It is very important to popularize the vacuum heat treatment technology by studying the vacuum heating method of various materials, the parts with different complexities and the distortion rules under various cooling conditions. Vacuum heating, atmospheric pressure or high pressure air quenching, air flow uniformity of the hardening effect of parts and mass dispersion has a great impact. It is of great significance to improve the structure of furnace by studying the law of air circulation in furnace by computer simulation.
Vacuum heat treatment of mold materials great prospects. Most tool and die steel are currently taken in a vacuum heating, and then cooled in the gas quenching. In order to obtain satisfactory mechanical properties both on the surface and inside of the workpiece, a vacuum high pressure gas quenching technique must be used. At present, the air pressure of vacuum gas quenching has increased from 0.2MPa to 0.6MPa to 1-2MPa or even 3MPa. Therefore, the gradual increase of cooling gas pressure of high pressure gas quenching vacuum furnace is an important development trend.
Advanced production technology is to get better quality and better quality products, BTCarbide Precision Carbide Co.,Ltd., precision alloy parts production and processing, in accordance with the requirements of precision drawings, manufacturing requirements are welcome to contact a friend of our customers.
Zhuzhou Cemented Carbide Group, the use of tungsten carbide helicopter parts and important bearing parts, localization of the project through the acceptance
Recently, the company's commitment to the use of helicopter tungsten carbide parts and joint bearings home-made project, successfully passed the identification of customers and military organizations acceptance.
The helicopter for dual-use models, with good market prospects. Customers of the company's products developed a high degree of recognition, identification will be placed on the spot ordering needs, this is another new military research achievements.
In the past five years, the company has completed four national military research, production tasks, the development of national military standards 6, national defense invention patent 6, two technologies were rated as "international advanced" National Defense Science and Technology Progress Award and many other awards. In particular, bear the straight X, TA, Y series helicopters with a number of key wear-resistant parts, to fill the domestic blank, get rid of the passive situation dependent on imports, while the establishment of simulated life test platform, salt spray test platform and Judgement standard. The company is moving in the construction of domestic first-class armed helicopter with carbide products research and production base of the goal of big step forward.
Laser welding diamond circular saw blades and the preparation of the Chinese Patent Excellence Award
The results of the 18th China Patent Awards were announced. Laser welding diamond circular saw blades and the preparation method and utility model patent cylindrical sleeve optical fiber active connectors were awarded the China Patent Excellence Award, as well as precision carbide tool processing technology award.
The China Patent Award is the only government award granted exclusively for patented inventions in China. It has been recognized by the United Nations Intellectual Property Organization (WIPO) and has an international influence. Since its inception in 1989, it has been successfully held for 18 sessions. The award criteria not only emphasize the project's patent technology and innovation level, but also pay attention to its use in the market transformation process, but also to protect the status and management requirements, representing the highest level of China's independent innovation.