Purdue University develops new technology to improve metal cutting performance

Researchers at Purdue University in the United States have designed a new method for processing and cutting advanced metal materials widely used in manufacturing to improve their use in military equipment, vehicle manufacturing, solar panels, and medical and health care products. Application in the field. With this new method, the metal will be easier to process, and at the same time, it will be beneficial for the milling, turning, grinding and drilling of the metal, which will significantly reduce the cost of metal manufacturing and processing.

Advanced or precious metals are often difficult to obtain, and their manufacturing prices are also very expensive, part of which is due to the difficulty of metal processing. However, according to a recent paper published in "Review of Physics", the researchers developed a new process-by applying the designed surfactant (a chemical used in metal processing) to the metal surface, it can help improve The processing performance of metals helps metal materials to be cut or shaped into parts-the emergence of this new process will likely make people's current metal processing and manufacturing methods leapfrog. In previous research work, the team had coated common alcohols on the surface of aluminum alloys. Compared with not using alcohols, it can cut metals more easily and obtain a smoother metal surface. The same method has potential application in other metal material systems. However, different metals need to be coated with a specific surface active agent, because the alcohols do not show the excellent effect of combining with the aluminum alloy surface after coating on other metal surfaces. When exploring the toughness and strain hardening characteristics that can occur during metal shearing, the researchers found that applying commonly used glue and ink to the metal surface can reduce the cutting force by about 50%, and these two media It seems to apply to most previously tested metals. High-speed imaging pictures show that the medium has embrittled the metal surface.

In the traditional process, people usually need to apply lubricant to the high-pressure part where the shear stress is concentrated to improve the processing performance of the metal, and need to design and manufacture sophisticated tools so that the lubricant can be injected into the cutting tool. However, this study provides another alternative solution by changing the chemical properties of the fluid medium. Researchers say that by using the right chemical media, one can change the toughness of the metal, thereby reducing cutting forces and energy consumption. Lower cutting forces can also extend the life of cutting tools and improve the finish of metal surfaces. This representative "mechanochemical" effect has many potential applications, such as the copper brazing tip of robot welders in the automotive industry, or the main implants that need to be processed in plastic surgery. The productivity of similar products is limited by the difference in material processability. In the future, more in-depth research will mainly focus on the physical effects of materials-although the use of chemical active agents causes embrittlement of metal surfaces, the mechanism of action is not yet clear, and it is necessary to further determine the chemical substances that can cause embrittlement of specific metals And accelerate their development and synthesis.

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