Caracterização de fases e análise de trincas em junta soldada de Inconel 625 e aço 9Cr-1Mo após envelhecimento

• Ano de defesa: 2006
• Autor(a) principal: Nunes, Cristiana dos Santos
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Palavras-chave em Português: Ciência dos materiais; Inconel 625; Junta soldada; Trincas
• Link de acesso: http://www.repositorio.ufc.br/handle/riufc/15933

The discoveries of new oil deposits with right rates acidity caused the refining units of crudes use facilities modified and adapted to this condition. In order to increase the corrosion resistance and reduce the risk of failure during the operation are used alloy steels of type Cr-Mo, A-213 T-9 (9%Cr e 1%Mo) in the tubes in refining plants configuring tubes ASTM A335 GR P 9, as API RP-530, designed for continuous service in media containing sulfide and high temperature. These tubes are coated with aluminum and welded by TIG welding process, with the root password nickel alloy, Inconel 625, welding rod ER-NiCrMo-3 and fill electrode E 505. Thus, it studied the behavior of nickel alloy deposited on the union of the tubes, their properties and has been the characterization of phases present in the material after aging. For this, we used samples from 02 tubes A-213 T-9 coated with aluminum and welded together under the same conditions of the tubes of the furnaces of the units of petroleum refining. The samples were exposed to temperatures in the range of operation (500 º C to 700 º C) for periods of 10h, 100h, 500h e 1000h.