Magnetic properties and retained austenite quantification in SAE 4340 steel
AUTOR(ES)
Ajus, C., Tavares, S.S.M., Silva, M.R., Corte, R.R.A.
FONTE
Matéria (Rio de Janeiro)
DATA DE PUBLICAÇÃO
2009
RESUMO
Magnetic properties (coercive force and saturation magnetization) of SAE 4340 steel, heat treated in different ways, were measured in a Vibrating Sample Magnetometer. Four soaking temperatures were investigated: 860°C, 960°C, 1060°C and 1160°C. The oil-quenched samples were tempered at different temperatures between the range of 200°C and 650°C. The increase of the soaking temperature promotes the decrease of the saturation magnetization, which is mainly due to the retained austenite in the steel. This austenite transforms into bainite during tempering between 200°C and 300°C. The saturation magnetization measurements were used to quantify the amount of retained austenite in the different samples. The coercive force of the steel varied from 115.0 Oe (9151.7 A/m) to 133.0 Oe (10584.1 A/m), depending on the heat treatment condition.
Documentos Relacionados
- Influência da austenita retida no crescimento de trincas curtas superficiais por fadiga em camada cementada de aço SAE 8620
- Influence of Austenitizing on the Mechanical Properties of Maraging 300 and Sae 4340 Steels - Comparative Study
- Erratum: Influence of Austenitizing on the Mechanical Properties of Maraging 300 and Sae 4340 Steels - Comparative Study
- Quantification and Identification of the Carbides in Tool Steel AISI/SAE M2
- Normalizing treatment influence on the forged steel SAE 8620 fracture properties