ISSN 2594-5297
60th Seminar on Rolling, Metal Forming and Products — Vol. 60, Num. 60 (2025)
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Abstract
As part of its commitment to continuous product improvement, Usiminas has been continuously developing new Advanced High-Strength Steels (AHSS) to meet the challenging demands of the automotive sector, particularly in reducing emissions and enhancing vehicle safety. Among these materials, the electrogalvanized (EG) Complex Phase (CP) steel of the 1000 MPa class (CP1000EG) stands out. This study evaluated the robotic gas metal arc welding (GMAW) of 1.30 mm thick CP1000EG steel. The results demonstrated that defect-free joints were achieved, with weld bead geometries fully meeting the criteria established in the SEP1220:2020 standard. Optimal welding conditions were identified within the ranges of 16 V to 18 V for voltage and 90 A to 105 A for current. Radiographic inspection revealed low levels of porosity, indicating that the selected consumable is a suitable option for GMAW welding of electrogalvanized steels. The findings confirm that the GMAW parameters developed in this study are effective for welding CP1000EG steel and can serve as a reference for application engineering in the automotive industry.
AS PART OF ITS COMMITMENT TO CONTINUOUS PRODUCT IMPROVEMENT, USIMINAS HAS BEEN CONTINUOUSLY DEVELOPING NEW ADVANCED HIGH-STRENGTH STEELS (AHSS) TO MEET THE CHALLENGING DEMANDS OF THE AUTOMOTIVE SECTOR, PARTICULARLY IN REDUCING EMISSIONS AND ENHANCING VEHICLE SAFETY. AMONG THESE MATERIALS, THE ELECTROGALVANIZED (EG) COMPLEX PHASE (CP) STEEL OF THE 1000 MPA CLASS (CP1000EG) STANDS OUT. THIS STUDY EVALUATED THE ROBOTIC GAS METAL ARC WELDING (GMAW) OF 1.30 MM THICK CP1000EG STEEL. THE RESULTS DEMONSTRATED THAT DEFECT-FREE JOINTS WERE ACHIEVED, WITH WELD BEAD GEOMETRIES FULLY MEETING THE CRITERIA ESTABLISHED IN THE SEP1220:2020 STANDARD. OPTIMAL WELDING CONDITIONS WERE IDENTIFIED WITHIN THE RANGES OF 16 V TO 18 V FOR VOLTAGE AND 90 A TO 105 A FOR CURRENT. RADIOGRAPHIC INSPECTION REVEALED LOW LEVELS OF POROSITY, INDICATING THAT THE SELECTED CONSUMABLE IS A SUITABLE OPTION FOR GMAW WELDING OF ELECTROGALVANIZED STEELS. THE FINDINGS CONFIRM THAT THE GMAW PARAMETERS DEVELOPED IN THIS STUDY ARE EFFECTIVE FOR WELDING CP1000EG STEEL AND CAN SERVE AS A REFERENCE FOR APPLICATION ENGINEERING IN THE AUTOMOTIVE INDUSTRY.
Keywords
CP1000EG Steel, Weldability, GMAW Process
CP1000EG Steel, Weldability, GMAW Process
How to cite
BORBA, TADEU MESSIAS DONIZETE; CARVALHO, EUGENIO TOLEDO DE; COSTA, ADALTO VERNECK; MIRANDA, VICTOR HORTA; SOARES, LEANDRO MATOS LOPES.
GMAW WELDABILITY ASSESSMENT OF CP1000EG STEEL FOR AUTOMOTIVE APPLICATIONS,
p. 14-27.
In: 60th Seminar on Rolling, Metal Forming and Products,
São Paulo, Brasil,
2025.
ISSN: 2594-5297, DOI 10.5151/2594-5297-41787
