论文部分内容阅读
Based on the tests of a build-up welding at plate edge (BWPE) and a multi-layer build-up welding on plate (MBWP), the article studies on the solid-state phase transformations which affect welding distortion process and on the influence rule of transformation starting temperature (TST) of welded metal to the welding residual distortion. The welding distortion can be decreased or controlled by the transformation volume expansion caused by solid-state phase transformation of welded metal during the cooling. The test results of BWPE show that when TST is at about 190 ℃, the bending distortion of welded specimen is the smallest, and its displacements at free end are decreased to 58% and 67% compared with those of conventional welding electrodes A102 and E5015, which TST are less than room temperature and equal to 758 ℃ respectively. The test results of MBWP show that when TST were at 100~250 ℃, the welded specimen would appear reversible bending distortion compared with those of A102 and E5015. The maximum
Based on the tests of a build-up welding at plate edge (BWPE) and a multi-layer build-up welding on plate (MBWP), the article studies on the solid-state phase transformations which affect welding distortion process and on the influence rule of transformation starting temperature (TST) of welded metal to the welding residual distortion. The welding distortion can be decreased or controlled by the transformation volume expansion caused by solid-state phase transformation of welded metal during the cooling. The test results of BWPE show that when TST is at about 190 ° C, the bending distortion of welded specimens is the smallest, and its displacements at free end are decreased to 58% and 67% compared to those of conventional welding electrodes A102 and E5015, which TST are less than room the test results of MBWP show that when TST were at 100~250 ° C, the welded specimen would appear to be reversible bending distortion compared with those of A102 and E5015. The maximum