Abstract
HY-100 steel is a 690 MPa-minimum-yield-strength Ni-Cr-Mo quenched-and-tempered structural steel used by the U.S. Navy in marine applications. Rising fabrication costs have prompted the use of the high deposition rate submerged arc welding (SAW) process. This desire made it necessary to determine optimum parameters for SAW of HY-100 steel. HY-100 SAW welding consumables and 50-mm-thick HY-100 steel plate were used to produce bead-on-plate (BOP) welds at the heat input of interest, 2.2 MJ/m. A matrix of welding currents and voltages was used, ranging from 400 to 600 amperes and 33 to 37 volts, respectively, in order to determine any parametric effects that may occur at this heat input level. The 50 mm plate minimized thickness effects on weld metal cooling rates at the high heat input.
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