Abstract
ABSTRACTA comparative study of the effect of two different welding wires (W2 and Thermanit MTS-616 welding wire W1) on T92 welded joints has been made. Both wires showed good weldability and no defects in the welds were found. The hardness of the welded joint using W2 wire was lower than using W1. The toughness and high temperature (600°C) strength of the weld using W2 wire were higher than those using W1. The two welding wires produce joints having little difference in plasticity at room and high temperature. Large pores in both joints are related to the second phase of the larger particles in the matrix. The second phase of particles in the matrix easily caused cracks, which is unfavourable for the improvement of plasticity. Precipitation of the second phase of large particles in the matrix should be minimised for optimised welds.
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