Eventos Anais de eventos
COBEF 2017
Congresso Brasileiro de Engenharia de Fabricação
ANÁLISE DO EFEITO DO ENVELHECIMENTO À 450°C E 500°C NA MICROESTRUTURA E PROPRIEDADES MECÂNICAS DO AÇO MARAGING C300
Submission Author:
Max Kakue Sasaki , SC
Co-Authors:
Diogo Mendonça, Thiago José dos Santos, Carlos Augusto Silva de Oliveira
Presenter: Carlos Augusto Silva de Oliveira
doi://10.26678/ABCM.COBEF2017.COF2017-1523
Abstract
Maraging steels are ultra high mechanical strength alloys that are used in highly demanding mechanical applications, such as in the aerospace and military industries. These steels are hardened by precipitation, where there is a fine and dispersed formation of intermetallic in a martensitic matrix, obtained from the process of solution annealing and subsequent direct aging. In this work, the maraging steel C300 had its mechanical properties analyzed by tension tests, where two aging temperatures were used 450 and 500 ° C, Vickers microhardness test were used. Its microstructure was studied by optical microscopy, in order to measure the prior austenitic grain size. The analysis was performed in the solution annealed condition, prior to the hardness peak, at the peak of hardness and overaged, where it was possible to observe the precipitation process of the intermetallics by the corresponding increase in the hardness of the material besides the possible formation of the reverse austenite in the overaged conditions. A significant increase of the mechanical properties was observed as the steel were aging, presenting higher resistance values for the aging at 450ºC in relation to 500ºC and later the decrease of the resistance and hardness due to the formation of the reverse austenite in the super-aged condition.
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