Break through the technical difficulties of magnesium alloy machining,This technology has laid a good foundation for the warm punching of high-performance magnesium alloy products.
Because of its low density, high specific strength, high specific rigidity, easy recycling and no pollution, magnesium alloy is known as one of the "21st century green and environmentally friendly engineering materials", and has attracted widespread attention. However, some inherent weaknesses of magnesium alloys have been severely restricting its development.
One is that the crystal structure of the magnesium alloy is a close-packed hexagonal structure, especially its axial ratio c/a=1.624, which makes it only have 3 independent slip systems at room temperature, resulting in poor room temperature plastic deformation ability. The second is that the absolute strength is low, and as the temperature increases, its strength and creep resistance will drop significantly.
Therefore, the research and development of effective magnesium alloy forming and machining technology and the improvement of the properties of magnesium alloy through appropriate machining and forming technology have become important topics in the research of magnesium alloys in recent years.
The emerging strong plastic deformation technology research boom provides a new development direction for the research and development of magnesium alloy machining technology. Severe plastic deformation technology is an effective method for preparing ultra-fine-grained metal materials.
A series of techniques for preparing ultra-fine-grained materials through strong plastic deformation have been proposed, including equal channel angular extrusion, cumulative rolling, high-pressure torsion, shock wave impact, repeated wrinkle-straightening, torsional extrusion, and large Extrusion ratio extrusion method, multi-directional forging method and so on.
Among them, there are more researched equal channel angular extrusion method, cumulative rolling method, high-pressure torsion method, etc., especially the strong plastic deformation method represented by the equal channel angular extrusion method can greatly refine the grain size to obtain The grain size is less than 1 micron, even reaching or less than 100 nanometers of ultra-fine grain structure, this unique microstructure will lead to excellent physical and mechanical properties.
This kind of strong plastic deformation technology can not only overcome the difficulty of magnesium alloy deformation, but also greatly improve the strength and toughness of magnesium alloy through fine-grain strengthening. At present, magnesium alloy bulk materials with ultra-fine crystal or nanocrystalline structure have been obtained by a strong plastic deformation process, which has become a very promising new machining and forming process for preparing ultra-high strength and toughness magnesium alloys.
Chinese scholars have obtained many pioneering results in this regard. According to a report from Shanghai Jiaotong University, the Mg-Y-Zn alloy was prepared by the common melting and casting process combined with the equal channel angular extrusion process. Its room temperature mechanical properties reached a tensile strength of 472.7MPa, a yield strength of 444.6MPa, and an area reduction rate of 6.24%. Comprehensive mechanical properties.
In addition, in terms of conventional deformation machining technology, it is almost impossible for magnesium alloy sheet to be stamped at room temperature. Even if it is isothermal stamping at high temperature, its formability is still poor. At present, the plastic machining methods of magnesium alloy mainly include hot extrusion, isothermal forging and isothermal rolling. In order to overcome the difficulty of poor deformability of magnesium alloys, Chinese scholar Fan Likun and others proposed a new technology of differential temperature drawing process for magnesium plates.
This technology performs differential temperature heating on different parts of the magnesium plate according to the degree of deformation during deep drawing, and accurately controls the dynamic blank holder force. It comprehensively utilizes the deformation ability of the magnesium alloy at high temperature and the work hardening ability at low temperature to achieve A higher ultimate drawing ratio is achieved at a lower forming temperature.
Through computer program control, the use of this process can make the limit drawing ratio of conventionally rolled AZ31 sheets at 180°C reach 3.2, which is close to twice the isothermal drawing under the same conditions. This technology has laid a good foundation for the warm punching of high-performance magnesium alloy products and is a promising technology. (One member)
Keywords:Magnesium machining Difficulties
What is the difference between precision cnc machining and sheet metal machining...
The density of magnesium and magnesium alloys is low, only 1.74g/cm3, which is t...
The accuracy of CNC machining center mainly includes geometric accuracy, positio...
In our precision CNC hardware machining, the machining allowance is too small to...
CNC turning is mainly used to make round parts and is also the first choice for ...
Computer numerical control CNC milling is generally a metal fabrication process;...
Magnesium parts are easily oxidized by air after CNC milling, so how should anti...
Aluminum precision parts machining technology are the most widely used non-ferro...
CNC machining is a process method for machining parts on a CNC machine tool, and...
How to improve the efficiency and quality of CNC machining ? This is a commonpla...
What does 7:24 in CNC MACHINING BT handle mean? What are the standards of BT, NT...
Ordinary CNC machining generally refers to precision machining, CNC machining la...
Various casting methods including sand casting magnesium alloy, metal casting ma...
In our precision parts machining industry, the most commonly used machining meth...
There are many kinds of aluminum parts processed by CNC machine tools, among whi...
Aluminum and aluminum alloy cnc machining can be divided into rolling, extrusion...
CNC machining operation specification, mainly divided into 10 parts of CNC machi...
Many previous production and CNC machining methods and machining equipment have ...
CNC machining, also known as CNC machine tool machining, refers to the machining...
Aluminum alloy precision parts have high strength, good plasticity, excellent el...
Many people want to know what is the process of aluminum machining? In fact, the...
Nowadays, there are more and more, and the machining of precision parts is the s...
During the welding process of aluminum plate, if the atmosphere is in direct con...
There are generally two processes for mirror aluminum machining. One is to polis...
When looking for aluminum alloy precision parts machining plants, we need to cho...
Aluminum alloy machining technology is obtained by adding other metal elements t...
magnesium and aluminum Comparison In terms of technology, the current production...
CNC machining is still one of the cost-effective methods of on-demand production...
What are the Precision parts cnc machining skills characteristics of precision m...
Generally, the traditional Magnesium micro-arc oxidation film of magnesium alloy...
magnesium Micro-arc oxidation is a new technology for in-situ growth of ceramic ...
CPCI Rugged Chassis Shell is a customized chassis of our company. It has sturdin...
ATR chassis case machining was drafted by the American Avionics Technical Commit...
Aluminum alloy welding heat input is easy to quickly lose to the base metal, and...
Break through the technical difficulties of magnesium alloy machining,This techn...
The CNC machining process of magnesium alloy must be operated continuously, and ...
3D printing is a new type of rapid prototyping technology that integrates cuttin...
Compared with the equivalent material manufacturing process 3D printing has many...
Many people want to know what the aluminum profile machining process is like? In...
In the investment Precision casting production process, the reason for the burrs...
The structural parts with magnesium alloy as the base material are mainly used i...
Cutting fluids are generally divided into two types: oil-based and water-based. ...
The connection parts of the aluminum alloy body frame structure are formed by ca...
Aluminum forming The internal high pressure forming technology is a new type of ...
The solid shell protects the board, power supply and storage equipment, and can ...
Aluminum alloy is obtained by adding other metal elements to metal aluminum to o...
Aluminum shells are various shells made of aluminum alloys. It is highly flexibl...
Magnesium alloys are more and more widely used in modern society. Due to their u...
A lathe is a machine tool that mainly uses a turning tool to turn a rotating wor...
Usually five-axis linkage refers to the linear interpolation movement of any 5 c...
Four-axis: Generally, when the workpiece is not positioned in space, there are s...
Welding, also known as welding, is a manufacturing process and technology for jo...
For mechanical precision machining of gears and shaft parts, it is necessary to ...
CNC machining center is an automatic processing equipment developed by CNC milli...
Castings obtained by casting methods are called castings. So do you know what th...
Three-axis machining is processed by linear feed axes X, Y, and Z. Used for gene...
Precision workpiece roughness is in line with international standards (ISO), and...
There are many Parts machining technology, and the types of workpieces to be pro...
The role of the Precision parts Roving frame is to guide the yarn, and then guid...
Today I will talk about the general inspection and maintenance methods when the ...
In the near future, this project, known as the first unmanned CNC machining fact...
How will the tension in Ukraine affect China's manufacturing industry? This art...
Under the COVID-19 pandemic, China's manufacturing industry has resumed work on...
CNC machining quotations include material costs, machine depreciation costs, lab...
Because of the differences in aluminum materials, different machining processes,...
Chinese precision machining plants are high-end in many fields and in the world....
Aluminum alloy has better physical and mechanical properties than pure aluminum,...
Now every step of the mobile phone we hold in our hands is inseparable from prec...
Precision machining in China,China's machining industry, which is gradually grow...
Aluminum alloy forging production technology has developed by leaps and bounds, ...
In 2020, my country's total casting production has reached 51.95 million tons, ...
CNC machining can be said to be a more popular machining method at present. Comp...
CNC machining is a method of controlling machine tool movement and machining pro...
manufacturing machining 4.0 development was first proposed by Universal Robots o...
The United States has put forward the concept of smart manufacturing, which is g...
In recent years, the equipment manufacturing industry has achieved rapid develop...
In German manufacturing, there is a very interesting and crucial point: don't b...
The quality of the finished parts directly affects the quality of the mold, and ...
How are many things in daily life made from small springs to large cars? In fact...
Magnesium alloys have always attracted designers due to their low density. In th...
For a military case, it is very important to have a solid appearance, but when w...
Latest news
What is the difference between precision cnc machining a ...
The density of magnesium and magnesium alloys is low, on ...
The accuracy of CNC machining center mainly includes geo ...
In our precision CNC hardware machining, the machining a ...
Latest cases
The advanced equipment of the receiver housing can guara ...
The CPCI reinforced chassis is made of high-quality alum ...
Scan! Add WhatsAPP
Scan! Add WeChat