Super material graphene coating, technical breakthrough of new materials

In addition to the development of highly available graphene lithium power batteries, graphene as a nano-scale material has a new development direction and use. The material structure of graphene is very special, only a single hexagonal structure, and its thickness is only the molecular thickness. Therefore, in nano-scale materials, graphene has the strongest hardness, the most stable structure, and the most shear resistance. Recently, a new breakthrough has been made in the development of graphene.

Lightweight materials and molds

Stamping has always been regarded as the cornerstone of life by the manufacturing industry, but due to the continuous improvement of the precision of the products in the market, the loss of the mold is very large. At the same time, on the product side, for lightweight applications, there is a higher requirement for the performance of the mold. Under the traditional process, the components for lightweight materials are far from achieving the desired results. This also leads to an increase in manufacturing costs, accompanied by a low failure rate. And the most important processing tool, the mold is not used repeatedly. Because it caused a lot of waste of resources.

In terms of lightweight materials, aluminum alloy materials, magnesium alloys, and the like are common. However, due to the age of aluminum alloys in China, the use of aluminum alloys is generally 10 years. Moreover, although aluminum has good hardness and flexibility in processing, the oxidation of aluminum to form a corrosion-resistant aluminum film brings certain difficulty in welding. China's magnesium resources are very rich, accounting for 70% of the world's reserves. Magnesium-aluminum alloy has a prominent advantage in lightweight materials and has specific strength and stability that are not aluminum alloys. But it is lighter than aluminum alloy, with higher hardness, better flexibility, and better shear resistance. It is also because it is widely used inspecial equipment. But these lightweight, high-performance materials are very large for processing difficulties and tool wear. Many processing companies say that the cost has increased, the fineness of the product has decreased, and the loss of molds and equipment is much greater than before. Therefore, the performance of the mold is both an opportunity and a challenge for the processing and assembly industry.

Graphene-coated mold

Magnesium alloy deformation is a common problem faced by the global stamping industry because the coating on the mold is easily affected by high temperature and high pressure during the stamping process, which is 30% of the magnesium alloy deformation problem. Karben New Materials of Qingdao Graphene Industrial Park in China successfully developed a mold development using graphene coating. Compared with the traditional mold, the mold has high temperature and high-pressure resistance, low friction and high shear resistance, which can improve the stamping speed and precision by about 30%. The biggest feature of this mold is that it can change the characteristics of the mold for one-time use. Re-adding the coating after the mold has reached the end of its life can extend the length of time. You can reduce the mold consumption to one-sixth of the original.

"Growth coating" concept and processing 1mm magnesium alloy products

The traditional coating is sprayed on the surface of the mold in everyone's perception, but the graphene coating is “growth” on the surface of the abrasive tool by creating a special environment. Therefore, this technical concept from the inside to the outside makes it resistant to high temperature and high pressure without falling off. It has been experimentally confirmed that a graphene-coated mold can realize a magnesium alloy product having a thickness of 1 mm. This is quite technically difficult in the processing industry. Graphene provides a reliable guarantee for the processing of difficult and high-strength new materials in the future.

The page contains the contents of the machine translation.