Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
FRICTION HIDRO PILLAR PROCESSING APPLIED TO PLATFORM ANCHOR CHAINS WITH USAGE OF PRE AND POST HEATING
Submission Author:
Rafael Gonçalves , MG
Co-Authors:
Rafael Gonçalves, Sinésio Franco, Raphael Pires
Presenter: Rafael Gonçalves
doi://10.26678/ABCM.COBEM2019.COB2019-1477
Abstract
Arc welding process is frequently used to repair steel structure defects. But, when applied to the petroleum sector, this technique presents limitations such as: porosity, hydrogen embrittlement and formation of hard microstructures Friction Hidro Pillar Processing (FHPP), with great potential for application in the oil and gas industry. It consists in drilling a hole in the cracked region, which will later be filled with a consumable rod. In this process, the metallurgical bonding is achieved in the solid state and, consequently, lower temperatures are involved and it is less susceptible to the external environment. There was no formation of cracks; however, the pre and post-heating treatments at temperatures tested initially did not prevent the formation of hard phases such as martensite. This, combined with other unexpected results led to the search of new alternatives for the job, such as the use of higher post-heating temperature, with satisfactory results. The quality control of repairs was done through macrographic and micrographic analysis and hardness profiles.
Keywords
Friction hidro pillar processing, pre- and post-heating, repair quality, HAZ
