Method for preparing explosive composite rod in local vacuum environment

Abstract

The invention provides a method for preparing an explosive composite rod in a local vacuum environment. The method comprises the following steps that a to-be-composited rod, a to-be-composited pipe and a pvc (polyvinyl chloride) pipe are coaxially arranged from inside to outside, and the space between the pvc pipe and the to-be-composited pipe is filled with explosive and a detonator to form an explosive device of a to-be-welded material; the two ends of the gap between the to-be-composited bar and the to-be-composited pipe are sealed and vacuumized by reasonably utilizing sealing strips, so that a vacuum gap environment is formed; and the explosive device is detonated, the to-be-composited pipe and the to-be-composited bar are welded and combined through high pressure generated by explosive explosion, and the high-quality explosive composite bar is obtained. Compared with a traditional explosive composite rod preparation method, the method for preparing the explosive composite rod in the local vacuum environment has the advantages that the explosive velocity selection is more free, and the operability is higher; and the bonding strength of the explosive composite rod is remarkably improved, and meanwhile the unavoidable phenomenon that in a traditional preparation method, large-area melting occurs on a composite rod bonding interface due to the fact that gap air is not exhausted in time is effectively eradicated.

Description

technical field [0001] The invention belongs to the field of explosive welding and relates to a method for preparing an explosive composite rod in a partial vacuum environment. Background technique [0002] Bimetal composite rod is a commonly used high-quality composite material, which is often used in petrochemical, precision machinery, aerospace and other fields. This is because the bimetal composite rod not only has various advantages such as strong corrosion resistance, high strength, and good plasticity, but also can ensure that the physical and chemical properties of the original metal material remain unchanged. [0003] Explosive welding refers to the metallurgical combination of several identical or different metals using the high pressure generated by explosive explosion, which belongs to a solid-state welding process. It is characterized by the ability to manufacture quite a variety of bimetallic and even multimetal composite materials with a wide range of uses, a...

AI Technical Summary

Problems solved by technology

[0005] The invention provides a method for preparing explosive composite rods in a partial vacuum environment, aiming to eliminate the problem that the air in the gap affects the quality of composite rods produced by explosive welding

It significantly increases the strength of the bonding interface of the explosive composite rod, which not only effectively eliminates the unavoidable large-area melting phenomenon of the bonding interface between the pipe to be composited and the rod due to the untimely discharge of air in the gap in the traditional explosive welding method, but also avoids The problem that the base layer and the cladding material cannot be combined at all due to the lack of exhaust air

Images