Preparation method of high-efficiency explosion composite pipes and bars in local vacuum environment

Abstract

The invention provides a preparation method of high-efficiency explosion composite pipes and bars in a local vacuum environment. The preparation method comprises the following steps: coaxially arranging a first to-be-composited bar material, a second to-be-composited pipe material, a third to-be-composited pipe material and a fourth to-be-composited pipe material from inside to outside; enabling the position between the second to-be-compounded pipe material and the third to-be-compounded pipe material to be filled with explosive and a detonator to form an explosive device; sealing and vacuumizing the two ends of a gap between the first to-be-compounded bar material and the second to-be-compounded pipe material as well as the gap between the third to-be-compounded pipe material and the fourth to-be-compounded pipe material by using sealing strips to form a vacuum gap environment; and detonating the explosive device, and welding the to-be-compounded material by utilizing high pressure of explosive explosion to obtain a group of explosive composite bars and explosive composite pipes. Compared with a traditional preparation method, the preparation method of the explosion composite pipes and bars, provided by the invention, has the advantages that the energy utilization rate of the explosive is higher, the selection of the detonation velocity is freer, and the operability is higher; and the phenomenon of large-area melting of a composite interface caused by insufficient discharge of a gap air layer in a traditional preparation method is avoided.

Description

technical field [0001] The invention belongs to the field of explosive welding, and relates to a method for preparing high-efficiency explosive composite pipe rods in a local vacuum environment. Background technique [0002] Explosive welding is a commonly used welding method. Its working principle is to use the impact force generated by the explosion of explosives to accelerate the cladding material, so that the cladding material collides with the base material at high speed in a short time to generate high temperature and high pressure, so as to achieve the effect of welding composite. . The characteristic of this welding method is that it can weld multiple metal materials with the same or different properties firmly and efficiently in a very short time, so as to manufacture bimetallic or even multimetal composite materials with a wide range of uses. [0003] Composite materials made of two or more different metals are called multimetal composites, which are characterized...

AI Technical Summary

Problems solved by technology

In fact, since a single metal material can no longer meet the needs of industrial production for multi-metal properties, multi-metal composite materials have become an irreplaceable part in industrial production.

[0004] As one of the commonly used methods for preparing composite multi-metal composite materials, explosive welding not only has the advantages that other conventional composite technologies cannot match, but also has some shortcomings that need to be solved urgently: traditional explosive welding can only produce one set at a time. Explosive composite pipe has a low utilization rate of explosive energy; in traditional explosive welding, the influence of air layer on welding quality is often ignored, and the air layer in the gap between composite materials will basically not be processed

In fact, if the air layer in the gap is not completely exhausted during the explosive welding process, on the one hand, it will reduce the bonding quality of the welding materials, and on the other hand, it is more likely to cause a large area of ​​melting at the bonding interface, resulting in the substrate material and double plate The material cannot be effectively compounded at all

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