Effect of Plate Rolling Strategy and Nb Microalloying in the HAZ Performance After Welding
(Room 402)
16 May 22
3:30 PM
-
4:00 PM
Speaker(s):
Doug Stalheim, President, DGS Metallurgical Solutions; Pello Uranga, CEIT and Tecnun (University of Navarra); Daichi Izumi, JFE Steel Corp.; Nobuyuki Ishikawa, JFE Steel Corp.; David Jarreta, Senior Technology Specialist, CBMM Asia; David Martin, CBMM; Nerea Isasti, CEIT and University of Navarra; Jose M. Rodriguez-Ibabe, CEIT and University of Navarra
The definition of hot rolling parameters to achieve the most suitable combination of final microstructure and precipitation is a key factor to control mechanical properties of welded plates. In this work, several Ti-Nb microalloyed steels were rolled following standard and optimized rolling strategies, resulting in different microstructures and precipitation states in the hot-rolled plates. Both simulated and real welding treatments were applied to the plates and the mechanical properties measured. The correlation between hot rolling parameters, precipitate population, microstructural features and mechanical performance was evaluated. High mechanical performance of welded plates was achieved for the optimized rolling conditions.