Texto completo de evento
Soldagem circunferencial do a??o inoxid??vel super duplex UNS S32750 pelo processo MIG com controle CMT
Circunferencial welding aplied for inoxidable steel super duplex UNS S32750 using the process MIG with CMT control
Autor
INVERNIZZI, BRUNO P.
NEVES, MAURICIO D.M. das
CONGRESSO NACIONAL DE SOLDAGEM, 42.
Resumen
This study carried out circumferential welding experiments in tubes with 3.68 mm thick. Welding was
performed using MIG welding equipment with CMT Cold Metal Transfer?? control and with the aid
of Motoman robot and a turntable. This was to ensure the accurate positioning of the torch and that the welding
was fully implemented in the 1G position, respectively. The weld joints were then evaluated visually, and the
joints which present fully penetration were then subjected to tensile testing, microhardness Vickers test and
metallography. The welding performed, has shown a lack of penetration for all parameters performed when
welded by CMT conventional process. To avoid this problem, the weld was performed using the CMT process
combined with pulsed arc, thus creating greater energy during welding, resulting in full penetration and
improved surface finish. For this process which has provide fully penetration, the mechanical tests and the
metallographic tests were performed and has present adequate results.