Caracterização metalográfica em juntas dos aços DP e TRIP soldados em LBW
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Data
2021-02-22
Autores
Machida, Rodrigo Yuji Pasqualini
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Editor
Universidade Estadual Paulista (Unesp)
Resumo
Devido as novas exigências estabelecidas no mercado automobilístico, as indústrias
automotivas enfrentam uma maior competitividade para que possam produzir veículos com
maiores levezas e que garantam eficiência, acessibilidade e a segurança dos consumidores.
Mediante a este cenário global, houve as inciativas das indústrias em investirem no programa
FSV (Future Steel Vehicle), que possuem os aços DP980 e o TRIP780 no portfólio. Uma das
técnicas de união destes tipos de aço para buscar melhor desenvolvimento é a soldagem a
laser. As propriedades mecânicas de um material estão relacionadas a sua microestrutura,
sendo de grande importância conhece-las qualitativamente. O trabalho consistiu na análise
microestrutural, das regiões destes aços soldadas a partir de três parâmetros: potência;
velocidade de solda e o material de face, por meio do ataque LePera. A partir dos ataques
realizados, foi possível observar diferentes morfologias características do processo de
soldagem, identificar a presença de martensita, ferrita e em alguns casos a bainita, além de
observar uma maior fração de martensita nas regiões do cordão de solda e da zona
termicamente afetada
Due to the new requirements established in the automotive market, the automotive industries face greater competitiveness so that they can produce vehicles with greater lightness and ensure efficiency, accessibility and consumer safety. Through this global scenario, there were the companies to invest in the FSV (Future Steel Vehicle) program, which have dp980 and TRIP780 steels in the portfolio. One of the techniques of joining these types of steel to seek better development is laser welding. The mechanical properties of a material are related to its microstructure, and it is of great importance to know qualitatively the microstructure. the work consisted of microstructural analysis of the regions of these steels welded from three parameters: power; welding speed and the face material, through the LePera attack. From the attacks performed, it was possible to observe different morphologies characteristic of the welding process, identify the presence of martensite, ferrite and in some cases bainite, besides observing a higher fraction of martensite in the regions of the weld bead and the thermally affected zone
Due to the new requirements established in the automotive market, the automotive industries face greater competitiveness so that they can produce vehicles with greater lightness and ensure efficiency, accessibility and consumer safety. Through this global scenario, there were the companies to invest in the FSV (Future Steel Vehicle) program, which have dp980 and TRIP780 steels in the portfolio. One of the techniques of joining these types of steel to seek better development is laser welding. The mechanical properties of a material are related to its microstructure, and it is of great importance to know qualitatively the microstructure. the work consisted of microstructural analysis of the regions of these steels welded from three parameters: power; welding speed and the face material, through the LePera attack. From the attacks performed, it was possible to observe different morphologies characteristic of the welding process, identify the presence of martensite, ferrite and in some cases bainite, besides observing a higher fraction of martensite in the regions of the weld bead and the thermally affected zone
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Palavras-chave
Metalografia, Aços avançados, Soldagem a laser, Microestrutura, Metallography, Advanced steels, Laser welding, Microstructure, Aço - metalografia, Soldagem