The aim of this project is to create conditions for the student to apply theoretical knowledge acquired during the academic year to solve real engineering problems. The selected research topic is very important and complex, as the problem of individual component wear reducing in the manufacturing industry is very relevant and practically inevitable. Increasing abrasion resistance is an essential science and engineering challenge. Reducing wear and tear allows you to ensure the durability, reliability of machines and their components, and, along with secondary recycling of materials, is one of the most important ways to achieve the circular economy goals. In order to extend the life of parts, the formation of abrasion resistant coatings on workpiece working surfaces is one of the most cost-effective solutions for reducing the use of rare alloy elements. The aim of this project is to explore the possibilities of using TIG welding for coatings.
Project funding:
Project is funded by EU Structural Funds according to the 2014–2020 Operational Programme for the European Union Funds’ Investments priority “Development of scientific competence of researchers, other researchers, students through practical scientific activities” under Measure No. 09.3.3-LMT-K-712.
Project results:
The TIG welding technology process regimes suitable for coating production are specified, the chemical composition of the surface coating is selected. Investigation of performance and mechanical testing of formed coatings. Microstructure analysis of coatings.
1. TIG welding technology using a non-consumable electrode and mechanically sintered Cr3C2-Ni reinforcing can be used to produce wear-resistant coatings;
2. The solubility of the Cr3C2-Ni phase in the austenitic stainless steel matrix is higher than that of the Ni-based matrix;
3. Austenitic stainless steel matrix coatings are less sensitive to coating technology. This tendency is strongly expressed in Ni-based matrix coatings;
4. The introduction of the reinforcing phase increased the hardness of the coatings by 2 times in average, the wear resistance increased by 10 times with the use of stainless steel matrix and about 8 times by the Ni-based alloy.
In conclusion, TIG technology is well suited for the production of coatings thinner than SAW coatings. Another chemical composition of matrix and reinforcing phase can be used to form a wear-resistant coating with special properties. Standard welding equipment may be used during coating formation.
Period of project implementation: 2019-07-01 - 2019-08-31
Project coordinator: Kaunas University of Technology
