Search academic texts

Information × Registration Number 0221U100924, 0119U102363 , R & D reports Title Creation of scientific and technological principles for the production of disperse-hardened cast composite materials using concentrated sources of heating popup.stage_title Head Voron Mikhail M., Кандидат технічних наук Registration Date 11-01-2021 Organization Physico-technological institute of metals and alloys National academy of Sciences of Ukraine popup.description2  For the electron beam process of obtaining a cast composite material of the Cu-V system, it was found that the optimal content of vanadium is 0.5-1% of the mass. This concentration prevents the coagulation of vanadium particles during precipitation from the melt and their segregation during crystallization. For the foundry-laser process of obtaining composite materials based on silumin AK 7 with a composite component (P6M5) up to 5% in the volume of the melt, the rational intervals of values of fluid flow (Qfl) 0.02…0.03 kg/s), gas (Qg) 1.467 × 10-4…2.5 × 10-4 kg/s) and dispersed material (Q DM). As a replacement for the use of inert gases and increase the efficiency of laser heating of particles, a process of hybrid laser-flame treatment using a mixture of gases "air-propane" is proposed. Under the conditions of using this treatment, the optimal parameters of the process of forming a gas-powder stream with a flow ratio of 3:1 air-propane, which provides additional heating of particles in the stream and creates a protective environment from the products of the combustion reaction. According to the results of experimental testing, the efficiency of the application of foundry-laser and electron beam processes for the production of cast disperse-strengthened composite materials based on aluminum and copper alloys was confirmed. Product Description popup.authors Tymoshenko Andrii M. popup.nrat_date 2021-01-11 Close