Explosive welding method for hard and brittle materials

Abstract

The invention relates to an explosive welding method for hard and brittle materials, and belongs to the technical field of material processing. The technical problem to be solved by the invention is to provide an explosive welding method for a hard and brittle material, which can obviously reduce cracks. The explosive welding method for the hard and brittle material comprises the following steps: a, selecting a compound plate and a base plate according to needs, then laying the compound plate on the top of the base plate, and arranging a plurality of supporting columns between the base plate and the compound plate; b, laying a water layer on the upper surface of the compound plate laid on the base plate in the step a, then placing an explosive frame on the top of the compound plate covered with the water layer, and then evenly laying explosive for explosive cladding in the explosive frame, wherein the laying area of the explosive for explosive cladding is not smaller than the surface area of a substrate; and c, detonating to obtain the explosive composite board. The composite board obtained through the method is high in binding rate and binding strength, uniform and consistent in performance and good in board shape.

Description

technical field [0001] The invention relates to an explosive welding method for hard and brittle materials, belonging to the technical field of material processing. Background technique [0002] Explosive composite technology is large-area layered explosive welding. The products produced by this technology can be used in many fields such as chimney lining of thermal power plant, nuclear power condenser tube sheet, chemical reaction vessel, etc., and have high efficiency and low pollution. It has been widely used The application in the field of metal processing has created huge social value. At present, titanium, stainless steel, copper, nickel and other metal materials with low hardness and good ductility have made rapid progress, and can meet the needs of large-scale industrial production in terms of specifications, bonding ratio, and bonding strength. However, some hard and brittle materials, such as tungsten, molybdenum, ceramics, etc., are several times harder than the ...

AI Technical Summary

Problems solved by technology

[0004] 1. Use butter, engine oil, asphalt and other soft oils to cover the surface of the double board as a buffer layer. This method can reduce 20% to 30% of cracks, but there are still a lot of cracks, and it is not effective Transmission of explosive energy, the bonding rate and bonding strength are very low, which cannot meet the needs of industrial production;

[0005] 2. Use hard materials such as cardboard, gypsum board, wood board, plastic, and glass fiber reinforced plastic as the buffer layer. This method can reduce cracks by more than 50%, but it cannot completely solve the problem of cracks. The bonding strength is only tens of MPa. The rate is lower than 70%, which cannot be used for industrial production;

[0006] 3. Underwater blasting, the whole structure is placed underwater. Although this method can effectively ensure the uniformity of explosive welding, the energy of the explosive is still directly applied to the doubler plate, which cannot reduce the occurrence of cracks.

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