Manufacturing method with manual welding crack defect test board

Abstract

The invention discloses a manufacturing method with a manual welding crack defect test board. The test board is mainly used for training of welding quality nondestructive testing personnel. The alloy condition of meeting quenched structure generation should exist in a crack generation area; a gap is precisely prepared in a local area of a multi-layer backing weld or filling bead or cap weld, a restraint condition is formed by carrying out repair welding on the gap, and then a large enough residual stretching stress field is generated; during welding, the large diffusible hydrogen content exists in a welding line, and during later gap repair welding, under formed stretching stress, diffusible hydrogen is diffused and gathered to the area to induce crack generation; and after cracks are pre-manufactured, filling welding and cap welding of a weld bead are carried out through shielded metal arc welding or argon tungsten-arc welding, and the integrity of the front face of the weld bead is guaranteed. According to the method, the positions, length, depth and self height of the cold cracks can be controlled according to design requirements, and therefore the utilization rate of the welding defect test board is increased.

Description

technical field [0001] The invention belongs to the field of metal welding quality inspection, and in particular relates to a preparation process method of a welding defect test plate. The test plate is mainly used for training personnel for non-destructive testing of welding quality. Background technique [0002] At present, non-destructive testing methods mainly include conventional ray testing RT, ultrasonic testing UT, magnetic particle testing PT, penetrant testing MT and new testing techniques TOFD testing, phased array testing PAVT, etc. In order to accurately and proficiently master the above-mentioned inspection techniques, inspectors need to carry out a lot of theoretical study and practical training, pass the examinations of corresponding organizations and obtain qualification certificates. In the process of learning and skill training of inspectors, a certain number of welding defect test plates are required for trainees to practice. The defects in these defecti...

AI Technical Summary

Problems solved by technology

The above-mentioned methods for preparing welding defects have successfully realized the reproduction of welding defects, however, some methods cannot achieve quantitative control of welding defects such as cracks

This limits the maximum utilization of welded defect test panels