INFLUÊNCIA DA PRÉ-DEFORMAÇÃO PLÁSTICA, DA TEMPERATURA E DO TEMPO DE AQUECIMENTO NO ENVELHECIMENTO DO AÇO BH220 ATRAVÉS DE PLANEJAMENTO DE EXPERIMENTOS

Bake Hardening steels are cold rolled steels with controlled aging. These steels are characterized by a good formability and an increase in the strength due to the aging that occurs during heat treatment. In this study, tensile test specimens of the BH200 steel were submitted to pre deformations ran...

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Published inTecnologia em metalurgia, materiais e mineração Vol. 14; no. 3; pp. 211 - 218
Main Authors Ferreira, Rafael Fagundes, Magalhães, Nathalia Sette Câmara, Carneiro, José Rubens Gonçalves, Dumont, Marcello Rosa
Format Journal Article
LanguagePortuguese
Published Sao Paulo Associação Brasileira de Metalurgia, Materiais e Mineração 01.07.2017
Subjects
Aging (metallurgy)
Bake hardenable steels
Cold rolling
Cold treatment
Deformation
Heat treatment
Mechanical properties
Steels
Yield point
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Summary:Bake Hardening steels are cold rolled steels with controlled aging. These steels are characterized by a good formability and an increase in the strength due to the aging that occurs during heat treatment. In this study, tensile test specimens of the BH200 steel were submitted to pre deformations ranging from 0% to 9% by uniaxial tension, subsequently they were subjected to an aging heat treatment performed at temperatures varying from 140°C to 210°C, in heating times between 5 minutes and 45 minutes. It has been confirmed that the aging temperatures, in the range studied, modified the yield point due to the phenomenon of diffusion, which is thermally activated. In the results, it is possible to verify that the heating time, within the range tested, it is not significant and the deformation was the largest variable that contributed to the increase of mechanical properties.
ISSN:2176-1523
2176-1515
2176-1523
DOI:10.4322/2176-1523.1037