InfluÃncia do Resfriamento sub-zero apÃs o Envelhecimento na FormaÃÃo de Austenita Revertida em um AÃo Maraging 350 / Influence of sub-zero cooling after the formation of austenite on Aging Reversed in a maraging steel 350

AUTOR(ES)
FONTE

IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia

DATA DE PUBLICAÇÃO

29/09/2008

RESUMO

Maraging steels are materials of ultra high strength mainly composed of a base quaternary Ni-Co-Mo-Ti which have excellent toughness combined with high mechanical strength being used in war industry, nuclear, aircraft components, pressure vessels up to the sports industry . One of its important applications is in use in hysteresis motors which require materials with characteristics of magnetically soft materials and high mechanical strength. Microdueza tests were performed to determine mechanical properties in different treatment conditions of aging and cooling media. In order to discover the phases present in the material conditions in the various treatment trials were performed by X-ray diffraction as well as analyze the macrotexture through FDOC `s. The microtexture was examined using the technique of EBSD (Electron Diffraction Backscatterig) in order to study the influence of the texture of the austenite in the martensite aging in certain conditions and means of cooling. This thesis is of great importance for the development of new products using maraging steel, because it determines the conditions that provide the mechanical properties as well as the phases and texture present in the material conditions of treatment required.

ASSUNTO(S)

engenharia de materiais e metalurgica austenita aÃo maranging austenite reversed maraging 350 ciÃncia dos materiais

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