Submerged arc welding process of wind power foundation sheet

Abstract

The invention discloses a submerged arc welding process of a wind power foundation sheet. The submerged arc welding process comprises the following steps of blanking treatment, pre-welding groove treatment, assembly welding, temperature control, welding, appearance detection and nondestructive testing. The submerged arc welding process has the beneficial effects that the multi-layer and multi-passstaggered welding is adopted, weld grains are refined through the technology so as to improve the weld crystal structure, so that the mechanical properties and low temperature toughness of a weld anda heat affected zone of the weld are improved; a work clamp is used for fixing the sheet in the blanking processing process, and deformation caused by uneven heat, temperature gradient and the like in the blanking process is avoided, so that the structure, the groove size and the like are accurately controlled; flux-cored gas shielded welding FCAW is used for assembling, and a carbon dioxide gasshielded welding wire E501T-1L is selected, and the performance of the welding wire is consistent with the performance of the base metal, so that the requirements of the welding process are met; and the submerged arc welding method is adopted, so that the production efficiency is high, meanwhile, the quality requirements of the weld are met, the welding quality is well guaranteed, and the efficiency is improved.

Description

technical field [0001] The invention relates to the field of welding technology, in particular to a thin-plate submerged arc welding process for wind power foundations. Background technique [0002] With the rapid development of the national economy, the shortage of power in some areas is increasing, and the land areas with good wind resources have been basically constructed, but there are still a large number of low-wind areas with not very high wind speeds but relatively stable wind speeds, which can be solved. The production and transportation of wind speed towers can bring a lot of market space. The weld seam welding of thin steel plate has the following characteristics and difficulties: 1. Due to the small thickness of the thin plate, it is difficult to guarantee the welding impact toughness; Groove size; 3. The thickness of the parts is small. During the process of assembly welding and submerged arc welding, it is easy to produce porosity defects caused by welding; 4....

AI Technical Summary

Problems solved by technology

The weld seam welding of thin steel plate has the following characteristics and difficulties: 1. Due to the small thickness of the thin plate, it is difficult to guarantee the welding impact toughness; Groove size; 3. The thickness of the parts is small, and in the process of assembly welding and submerged arc welding, it is easy to produce porosity defects caused by welding; 4. In the process of welding circular seam, it is easy to cause poor weld formation and metal overflow

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