Method for preventing breakage of titanium steel bimetal composite board by adopting explosion welding at low temperature

Abstract

The invention discloses a method for preventing breakage of titanium steel bimetal composite board by adopting explosion welding at a low temperature. The method comprises the following steps: performing surface treatment on a basic-layer metal board and a stratified-layer metal board; paving a layer of fine sand on a ground foundation, paving flexible protective materials on the fine sand; then placing the basic-layer metal board on the flexible protective materials; uniformly distributing spaced supporting sheets on the surface of the basic-layer metal board; then putting the stratified-layer metal board on the upper parts of the spaced supporting sheets; then pasting a paper-made dynamite frame on the upper surface of the stratified-layer metal board; coating a protective layer on the stratified-layer metal board; and finally, putting dynamite in the paper-made dynamite frame, and detonating an electric detonator to obtain the bimetal composite board. Thermal treatment, leveling and cutting of the bimetal composite board subjected to explosion welding can be carried out so as to obtain the metal composite board with required specification. According to the method disclosed by the invention, good explosion welding of the TA1+Q235B titanium steel composite board with large format under the minus-10-DEG C low temperature condition can be realized, the breakage phenomenon of the basic-layer metal board caused by low-temperature brittleness is avoided, and the method has the advantages of being high in production efficiency and good in product quality.

Description

technical field [0001] The invention relates to the technical field of explosive welding, in particular to a method for preventing fracture by explosive welding of a titanium-steel bimetal composite plate at low temperature. Background technique [0002] In the past ten years, with the continuous increase and wide application of titanium metal production, especially in industries such as electric power, chemical industry, shipbuilding and various pressure vessel manufacturing, titanium has excellent corrosion resistance, steel is cheap and has a certain strength. , Titanium-steel composite plates have been made by explosive welding technology, and are used to manufacture various corrosion-resistant equipment after the processing method, especially the explosive welding method, has made progress. Save titanium and reduce costs. There are many factors affecting the explosive composite method, such as the type of explosive, its performance and the dosage per unit area, the ini...

AI Technical Summary

Problems solved by technology

The existing domestic titanium-steel clad plate, especially the explosive welding of titanium and Q235B steel plate, has a bonding area ratio of less than 90% at a low temperature of 0-5°C, and it is very easy to cause the substrate to break, which cannot meet the production needs. Because the titanium-steel clad plate If it is broken or the bonding area ratio is not high, it is difficult to repair it again, and it is easy to cause waste of materials. At present, the domestic explosive welding of composite panels is carried out outdoors, which is greatly affected by temperature conditions.

[0003] Theoretically speaking, the quality of the explosively welded clad plate mainly depends on the type and performance of the explosive, the selection of the striking speed and striking distance parameters of the clad plate; During explosive welding, on the one hand, due to the poor impact performance of the Q235B steel plate itself, the resistance to explosive impact is relatively weak; phenomenon, seriously restricting product quality and production efficiency, and causing serious waste of resources

In the past, the main methods used in explosive welding are as follows: First, preheat the Q235B steel plate in the factory area before explosive welding. Thermal protection, especially affected by transport distances

Since the explosive welding sites are mostly built in the deep mountains with few residents, the distance is relatively long, this method is not only costly and wasteful, but also has poor effect

The second is to preheat the Q235B steel plate at the explosive welding site. Although this method solves the problem of long-distance transportation in theory, it is not only restricted by factors such as environmental protection, forest fire prevention, and production safety in the specific operation process. Moreover, due to the influence of the natural environment and low temperature, the preheating efficiency is low, the speed is slow, and the uniformity is poor. Not only did not achieve a good explosive welding effect, but also seriously affected the production efficiency and caused a waste of resources.

Therefore, in terms of explosive welding production practice, it is difficult to eliminate the phenomenon of fracture in the explosive welding process by the existing conventional -10°C low temperature preheating process for Q235B

Therefore, the explosive welding production of TA1+Q235B titanium steel clad plate under the low temperature condition of -10 ℃, the conventional production process method has low production efficiency and high fracture rate, and due to the non-weldability of titanium, the scrap rate is high and the waste of resources is serious

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