Análise de difusividade térmica na junção metal/cerâmica UNS 32304/sílico-aluminosa 45-50
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Data
2018-05-07
Autores
Caliari, Hendricky Fassarella
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Universidade Federal do Espírito Santo
Resumo
Fireclay bricks are widely used in industries where exist high temperature gradient from the working face to the cold face of the material. In the steel industry, for example, they are assembled in: blast furnaces runners, torpedo car, pig iron ladle, steel ladle, LD converter, etc.As ceramics, these materials are generally hard and brittle, have low tensile strength and impact resistance. This imposes limitations for applications when they are under mechanical stresses. In this way, an alternative is to combine the properties of the ceramic with the properties of the metals. With this objective in mind, in this dissertation, the joint of fireclay brick 45-50 in duplex stainless steel UNS 32304 was investigated. The thermal diffusivity measurements were performed with a carbon dioxide laser with Gaussian space profile, wavelength 10μ𝑚, intensity 10√2𝑊/𝑚2 and diameter equal to 2𝑚𝑚.Using UNS 32304 steel plates, several substrates with dimensions of 70x7x1,807𝑚𝑚were manufactured. Subsequently, these substrates were milled, producing rectangular channels with 2𝑚𝑚wide by 1𝑚𝑚deep. Silica-aluminous ceramics were cut with 70x2x3𝑚𝑚and coupled in these generated channels. Thermal diffusivity was measured with the flash laser method. The measurement results about thermal diffusivity in the metal / ceramic junction were close to those theoretically estimated, considering the hypothesis of additivity without interference between the compounds
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Thermal diffusivity , Duplex UNS 32304 stainless steel , Fireclay bricks , Tijolo silico aluminoso , Método Flash Laser
Citação
CALIARI, Hendricky Fassarella. Análise de difusividade térmica na junção metal/cerâmica UNS 32304/sílico-aluminosa 45-50. 2018. 50 f. Dissertação (Mestrado em Engenharia Mecânica) - Universidade Federal do Espírito Santo, Centro Tecnológico, Vitória, 2018.