ISSN 2594-5297
56° Seminário de Laminação e Conformação de Metais — vol. 56, num.56 (2019)
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Currently, continuous implementation of safety and CO2 emission standards in automotive vehicles has driven the search for weight reduction and safety enhancement solutions. In this context, the development of steels of high mechanical strength has been presented as the most applicable. Due to the strong elastic return after the stamping operations, parts that have geometric complexity and require greater mechanical strength are generally produced by hot stamping. The steels employed have addition of boron, such as 22 MnB5. Parallel to the development of steels, researches related to the development of metallic coatings capable of withstanding mechanical stresses and heat treatment have been carried out. During the process of manufacturing the steels for the hot stamping process some control points become extremely necessary. These points are distributed throughout the production chain, ranging from the control of the chemical composition, either by the elements responsible for temperability (C, Mn, B, etc.), as well as to the cold rolling and subsequent annealing and galvanizing processes. In the present work, a study was carried out on the effect of the process parameters of a continuous annealing and application of metal coating by hot immersion in the mechanical and microstructural characteristics of 22MnB5 steel for the hot stamping process. The samples were subjected to dilatometry simulations with fast cooling by helium injection.The results obtained by simulation were compared to the results obtained in industrial processing, being evaluated by tests of microhardness, uniaxial traction and metallographic analyzes.
Currently, continuous implementation of safety and CO2 emission standards in automotive vehicles has driven the search for weight reduction and safety enhancement solutions. In this context, the development of steels of high mechanical strength has been presented as the most applicable. Due to the strong elastic return after the stamping operations, parts that have geometric complexity and require greater mechanical strength are generally produced by hot stamping. The steels employed have addition of boron, such as 22 MnB5. Parallel to the development of steels, researches related to the development of metallic coatings capable of withstanding mechanical stresses and heat treatment have been carried out. During the process of manufacturing the steels for the hot stamping process some control points become extremely necessary. These points are distributed throughout the production chain, ranging from the control of the chemical composition, either by the elements responsible for temperability (C, Mn, B, etc.), as well as to the cold rolling and subsequent annealing and galvanizing processes. In the present work, a study was carried out on the effect of the process parameters of a continuous annealing and application of metal coating by hot immersion in the mechanical and microstructural characteristics of 22MnB5 steel for the hot stamping process. The samples were subjected to dilatometry simulations with fast cooling by helium injection.The results obtained by simulation were compared to the results obtained in industrial processing, being evaluated by tests of microhardness, uniaxial traction and metallographic analyzes.
Palavras-chave
Intercritical annealing, Dilatometry, Hot stamping
Intercritical annealing, Dilatometry, Hot stamping
Como citar
Cerqueira, F. M.;
Oliveira, C. A. S.;
Neto, B. K.;
Martins, L. P. R..
INFLUENCE OF THE PROCESS PARAMETERS OF INTERCRITICAL ANNEALING IN THE PRODUCTION OF STEELS FOR HOT STAMPING
,
p. 35-43.
In: 56° Seminário de Laminação e Conformação de Metais,
São Paulo,
2019.
ISSN: 2594-5297
, DOI 10.5151/2594-5297-32287
