Navegando por Assunto "Heat transfer coefficient at the metal/mold interface"

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Projeto, construção e aferição de um dispositivo de solidificação unidirecional horizontal refrigerado à água
(Universidade Federal do Pará, 2007-04-16) SILVA, José Nazareno Santos da; ROCHA, Otávio Fernandes Lima da; http://lattes.cnpq.br/0702326922309672; MOREIRA, Antonio Luciano Seabra; http://lattes.cnpq.br/0667768010106721
The aim is about the solidification structures of thermal parameters is important to mechanic behaviour of the metallic materials. These structures are influenced by means of heat removal conditions of metal/ mould system during the solidification process. Despite of this, some mathematic models have been developed to appraise the structural and thermal variation mainly considering the upright unidirectional solidification process. This research plans to project, construct and check up one device in order to be able to represent the horizontal unidirectional solidification process cooled by water which considers the solute convection effects. To check up the solidification device, a comparative study was done between the representative experimental bend of metal´s thickness solidification related to time to Al-4%Cu, Sn-5%Pb, Sn-15%Pb e Sn-20%Pb alloys. The present results shows positive consonances. The unidirectional aspect of the heat removal constructed was estimate trough the macrostructure characterization of the studied alloys. Finally a comparative study is done between values of the interface metal/mold heat transfer coefficient obtained trough other newly works developed about ascendant and descendent unidirectional solidification process.