Desenvolvimento de chapas grossas de aço API 5L Grau X80 –
processamento termomecânico controlado

Geraldo Lúcio de Faria; Rodrigo Rangel Porcaro; Leonardo Barbosa Godefroid; Luiz Cláudio Cândido; Ricardo José de Faria

doi:10.4322/2176-1523.20243038

Artigo Original

Desenvolvimento de chapas grossas de aço API 5L Grau X80 – processamento termomecânico controlado

Development of heavy plates API 5L Grade X80 – thermomechanical control processing

Geraldo Lúcio de Faria; Rodrigo Rangel Porcaro; Leonardo Barbosa Godefroid; Luiz Cláudio Cândido; Ricardo José de Faria

http://dx.doi.org/10.4322/2176-1523.20243038 Tecnol. Metal. Mater. Min., vol.21, e3038, 2024

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Resumo

O Brasil vem aumentando significativamente a produção de óleo, gás e seus derivados. No entanto, para que seja possível explorar e transportar estes recursos de forma economicamente viável e segura, os produtos tubulares de aço vêm sendo utilizados como ferramenta fundamental. Considerando as condições de trabalho cada vez mais agressivas destes tubos sob a óptica de desempenho mecânico e corrosão, este importante segmento industrial tem demandado cada vez mais tecnologia de fabricação e qualidade dos produtos. Neste cenário, percebe-se que a demanda por chapas grossas para manufatura de tubos de aço com costura que atendam aos requisitos do Grau API 5L X80 tem crescido. Entretanto, a fabricação deste produto por processamento termomecânico controlado, sem a necessidade de uma linha de tratamentos térmicos, ainda é um desafio econômico e tecnológico relatado por pesquisadores. Sob este ponto de vista, o presente artigo apresenta o estado da arte sobre a utilização do processamento termomecânico controlado em aços ARBL para a fabricação de chapas grossas majoritariamente bainíticas que atendam aos requisitos do Grau X80 da norma API 5L. A compilação de informações disponibilizada neste trabalho aponta diretrizes relevantes que são de interesse para pesquisadores e para a indústria, especialmente no Brasil.

Palavras-chave

Aço API 5L grau X80; Chapas grossas; Laminação termomecânica; Evolução microestrutural; Desenvolvimentos recentes

Abstract

Brazil has been significantly increasing the production of oil, gas, and their derivatives. However, steel tubular products have been employed as a fundamental tool to exploit and transport these resources economically and safely. Considering the increasingly aggressive working conditions to which these pipes are subjected, this important industrial segment has been increasingly demanding manufacturing technology and product quality from the perspective of mechanical performance and corrosion. In this context, it is evident that the demand for thick plates for manufacturing seam-welded steel pipes that meet the requirements of API 5L X80 Grade has been growing. However, as reported by researchers, manufacturing this product through thermomechanical control processing, without the need for a heat treatment line, remains an economic and technological challenge. From this standpoint, this present paper provides a state-of-the-art overview of the use of thermomechanical rolling in HSLA steels for the production of predominantly bainitic thick plates that comply with the requirements of X80 Grade as per the API 5L standard. The information compilation presented in this work provides relevant guidelines of interest for researchers and the industry, especially in Brazil.

Keywords

API 5L grade X80 steel; Heavy plate; Thermomechanical control processing; Microstructural evolution; Recent developments.

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Submetido em:
01/12/2023

Aceito em:
01/02/2024