Effect of heat input in austenite overlaying on under overlay crack elimination

The effect was experimentally studied of the ratio of specific heat input of the welding process on the second and first layers of an austenitic anticorrosion overlay on the deformation properties of the heat affected zone of basic material, conditioning the formation of cracks under the overlay during the heat treatment of the weldment from low-alloy Cr-Mo-V steel. The knowledge acquired in the process shows that the optimal ratio of heat input of the said welding processes is within the range of 1.2 to 1.8 with the application of strip electrode (60 - 20) mm x 0.5 mm for the first overlay layer and a strip 60 x 0.5 mm for the second overlay layer. (author)