ISSN 2594-5297
58º Seminário de Laminação, Conformação de Metais e Produtos — vol. 58, num.58 (2023)
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Abstract
Advanced High Strength Steels (AHSS) have been applied in the manufacturing of automotive parts. These steels grades have a combination of a ferritic matrix, with high ductility; and a second constituent dispersed in the matrix (which can be martensite, bainite or a combination of both), which presents high hardness, making them more sensitive to edge damage. Defects such as nucleation and crack propagation from the cut edges may occur. Therefore, the objective of this research is to design, manufacture and test a experimental bench in order to evaluate cryogenic punching of the cold rolled DP780 steel sheet, with a thickness of 0.65 mm. Punching cutting at cryogenic temperatures is seen as an alternative for reducing the level of work hardening in the material, having the potential to produce parts with better cutting quality, as well as greater flange stretching capacity. The present study provided the development of a device for application of liquid nitrogen (LN2) on the sample, with the temperature control, and evaluated the work hardening distribution, using the EBSD technique, along the cut edges at ambient and cryogenic temperatures.
Advanced High Strength Steels (AHSS) have been applied in the manufacturing of automotive parts. These steels grades have a combination of a ferritic matrix, with high ductility; and a second constituent dispersed in the matrix (which can be martensite, bainite or a combination of both), which presents high hardness, making them more sensitive to edge damage. Defects such as nucleation and crack propagation from the cut edges may occur. Therefore, the objective of this research is to design, manufacture and test a experimental bench in order to evaluate cryogenic punching of the cold rolled DP780 steel sheet, with a thickness of 0.65 mm. Punching cutting at cryogenic temperatures is seen as an alternative for reducing the level of work hardening in the material, having the potential to produce parts with better cutting quality, as well as greater flange stretching capacity. The present study provided the development of a device for application of liquid nitrogen (LN2) on the sample, with the temperature control, and evaluated the work hardening distribution, using the EBSD technique, along the cut edges at ambient and cryogenic temperatures.
Keywords
AHSS; punching; cryogenics; edge stretching
AHSS; punching; cryogenics; edge stretching
How to refer
Gonçalves, Rennáh Francisco Figueiredo;
Rodrigues, Flavio José Saraiva;
Ferreira, Jetson Lemos;
Oliveira, Adilson José de;
Melo, Anderson Clayton Alves de;
Sousa, Fábio José Pinheiro;
Castro, Nicolau Apoena.
DEVELOPMENT OF AN EXPERIMENTAL BENCH FOR CRYOGENIC PUNCHING OF AHSS SHEETS
,
p. 120-133.
In: 58º Seminário de Laminação, Conformação de Metais e Produtos,
São Paulo,
2023.
ISSN: 2594-5297
, DOI 10.5151/2594-5297-40291
