Ministry of Education and Science of Russia 18 December 2024 17:43
Scientists of the Institute of Mechanical Engineering, Materials Science and Transport of Saratov State Technical University named after Gagarina Yu.A. created an innovative die tool of increased strength and durability for the manufacture of titanium blades of aircraft engines. Polytechnic technology offers a highly effective solution for hardening tools, which can significantly increase their service life and reduce the frequency of replacements and repairs.
“The disadvantage of many stamp designs for the aviation industry is the insufficiently high mechanical strength of the surface of the engravings of the upper and lower inserts, leading to their deformation and destruction during isothermal stamping of aircraft blades. Therefore, today engineers and scientists pay great attention to the creation of high-tech and more advanced stamp designs. We were able to create a stamp with improved quality and reliability characteristics in operation, which can significantly extend the service life of stamp equipment in production,” said Professor Igor Rodionov, one of the authors of the development, head of the Department of Welding and Metallurgy at IMT SSTU.
The increased strength of the die inserts was achieved by laser surfacing on the surface of their engravings of a high-strength nanostructured coating consisting of a two-component mixture of titanium carbide and boron carbide powders.
The proposed technology consists of several stages. First, a base for the formation of a deposited coating is applied to the surface of the prototypes — a special powder additive consisting of finely dispersed powders of titanium carbide and boron carbide mixed with a binder. The surface is then scanned with a laser. As a result of exposure to concentrated light flux, thermal stimulation occurs, which causes the melting of the powder additive and its integration with the base material.
With the help of multiple laser scanning and additional application of powder mixture layers, it is possible to achieve the specified thickness parameters and mechanical properties of the coating. This allows for maximum protection of the working surface of the die and improves its performance.
The uniqueness of the development is confirmed by the patent of the Russian Federation for a utility model.
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