Special aspects of the use of laser coaxial melting of powder materials for creating objects from copper-base alloys
Authors: Shishov A.Uu., Melnikova M.A., Holopov A.A., Misurov A.I., Perestoronin A.V., Smirnov A.R.
Published in issue: #12(108)/2020
DOI: 10.18698/2308-6033-2020-12-2042
Category: Metallurgy and Science of Materials | Chapter: Powder Metallurgy and Composite Materials
Among the methods of additive technologies, coaxial laser melting, i.e. direct metal deposition (DMD), is quite widespread. Essentially, this process is about creating objects by sequentially deposing layers of powder and melting them due to their simultaneous supply through a nozzle with focusing of laser radiation into the processing zone. Various powders are used as materials for this technology, the powders being selected depending on the tasks and final characteristics. One of the promising directions for implementation is the creation of complex structures from copper alloys for aircraft construction. Despite the fairly widespread use of this technology in relation to copper alloys, in particular bronzes, there is a small amount of data and research for this technology. The purpose of this study was to understand the process of forming the materials when grown by the DMD method. For this purpose, the fusion of bronzes with a steel substrate was investigated; special aspects were revealed, which made it possible to pose the second task - the study of fusion of bronzes with a copper substrate. As a result, the microstructure of the samples was considered and their micro-hardness was measured.
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