Thick steel plate low-temperature environment welding technology

Abstract

The invention discloses a thick steel plate low-temperature environment welding technology, which comprises the following steps: a safe scaffold and welding materials are prepared; components are mounted and adopted, and the whole structure installation is subjected to inspection and correction; after the structure installation is corrected in place, welding points are symmetrically arranged; grooves are inspected; heating zones at the grooves are preheated by preheating temperature; edge temperature measuring points of the grooves are subjected to temperature measurement by using a thermodetector; after the temperature is determined correct, welding is formally carried out; in the welding process, the thermodetector is used for measuring the temperature in the front and rear directions and the side faces of the welding points at any time; postweld heat treatment is carried out; and the welding regions which are subjected to postweld heat treatment are subjected to warming work. According to the invention, the occurrence of additional deformation caused by the dead weights of the components in the welding process can be effectively prevented; the welding regions are effectively protected; the welding quality of the welding regions is guaranteed; and the requirements of customers can be well met.

Description

technical field [0001] The invention relates to a welding process, in particular to a low-temperature environment welding process for thick steel plates. Background technique [0002] Steel structure building is a new type of building system, which involves the industry boundaries between real estate, construction, and metallurgy, and integrates into a new industrial system. This is the steel structure building system that people in the industry are generally optimistic about. Compared with traditional concrete buildings, steel structure buildings use steel plates or section steel instead of reinforced concrete, which has higher strength and better seismic resistance, and because the components can be manufactured in a factory and installed on site, the construction period is greatly shortened. Formally because of its many characteristics, it is gradually favored by many enterprises. [0003] While steel structure buildings have the above-mentioned many advantages, ther...

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Problems solved by technology

[0003] While steel structure buildings have the above-mentioned many advantages, there are great difficulties in the process of construction. In the current construction field, steel structure buildings account for a small proportion, and the construction technology is not mature enough. Therefore, whether it is From the designer's design, or in the actual construction process, there will be some problems more or less, for example: because the steel structure building is mainly formed by welding, although the steel structure itself can adapt to various temperatures, but its welding However, the entire welding process has very strict requirements on the temperature. If the temperature is too low, the preheated steel plate will cool down rapidly. Even if the joints can be welded at the fastest speed, the rapid cooling will seriously affect the welding quality, increasing It is dangerous during use, so the construction plan and technology of steel structure buildings still need to be improved.

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