Eventos Anais de eventos
COBEM 2023
27th International Congress of Mechanical Engineering
MANUFACTURING OF LOOPED DIAMOND WIRE BY UPSET WELDING AND HEAT TREATMENT OF WELD JOINT BASED ON JOULE EFFECT
Submission Author:
Miguel Barcelos , SC
Co-Authors:
Miguel Barcelos, Erick Cardoso Costa, Claudio Abilio da Silveira, Andre Kirsten, Fabio Antonio Xavier
Presenter: Miguel Barcelos
doi://10.26678/ABCM.COBEM2023.COB2023-2055
Abstract
Diamond wire sawing of brittle materials, such as Si, SiC and sapphire crystals, is a key process for the semiconductor and photovoltaic industries. This has led to a growing demand for research to investigate the effects of cutting parameters on the surface quality of silicon wafer. One of the approaches involves the manufacturing of a looped diamond wire to reproduce the industrial cutting process. For this, it was necessary to develop a resistance welding machine based on the concept of upset welding and parameterize the process. The high temperatures reached during the welding process cause the cold-worked grains to recrystallize, reducing the mechanical strength of the weld. In addition, the small diameter of diamond wire results in a high cooling rate, leading to the formation of martensite, which has high hardness and low ductility. Given the importance of heat treatment in the manufacturing of looped diamond wire, this work aimed to establish a heat treatment capable to form bainite microstructures in order to increase the ductility of the welding location. The results showed that the heat treatment was efficient and allowed the formation of a predominantly bainitic microstructure, with sufficient mechanical strength for the application of sawing brittle materials. Keywords: diamond wire, upset welding, Joule effect, phase transformation of steel, heat treatment.
Keywords
diamond wire, upset welding, phase transformation of steel, Heat treatment
