SU1094707A1 - Method of manufacturing bimetallic vessels by diffusion welding - Google Patents

Abstract

THE METHOD OF MAKING BIMETALLIC VESSELS BY DIFFUSION WELDING using a technological jacket, in which the cladding layer is installed inside the vessel, vacuum is created between their contacting surfaces, the assembly is placed in a compression furnace of quality by improving the contact of the cladding layer with the material of the vessel, reducing the complexity of the process and multiple use of the process jacket by eliminating Vani technological shirt to the workpiece, a vessel with a cladding layer is set in the processing jacket with clearance and filled with inert gas before it (A pressure equal to the pressure in the compression oven. x 4

Description

The invention relates to diffusion welding and can be used for the manufacture of bimetallic products.

A known method of manufacturing bimetallic vessels, clad from the inside with another metal by diffusion welding, in which two blanks are brought into contact according to the shape of the vessel with previously prepared surfaces, creates a vacuum of 10 mm Hg between them, heats it, exposes it to pressure and after a certain holding cool pj.

The disadvantage of this method is the complexity of the process.

The closest to the invention to the technical essence and the achieved effect is a method of manufacturing bimetallic vessels by diffusion welding using a technological jacket, in which the cladding layer is installed inside the vessel, vacuum is created between their contacting surfaces, the assembly is placed in a compression furnace, heated and created in it pressure 2.

The disadvantages of this method are the poor quality of welding due to poor contact of the cladding layer with the vessel material, the complexity of the process and the use of the process jacket due to its welding to the part being welded are high.

The aim of the invention is to improve the quality of welding by improving the contact of the cladding layer with the vessel material, reducing the labor intensity of the process and the repeated use of the technological jacket by eliminating welding of the technological jacket to the part to be welded.

The goal is achieved by the fact that, according to the method of manufacturing bimetallic vessels, diffusion welding using a technological jacket, in which the cladding layer is installed inside the vessel, a vacuum is created between their contacting surfaces, is placed on the side of the compression furnace, heated and pressure is created, the vessel with the cladding The layer is installed in the process jacket with a gap and filled with an inert gas to a pressure equal to the pressure in the compression furnace.

The drawing shows the scheme of the method.

The method is carried out as follows.

The cladding layer 1 is installed inside the vessel 2 and a vacuum is created between their contacting surfaces, placed in the technological jacket 3 with a gap, the entire assembly is installed in the compression furnace 4, the technological jacket is filled with an inert gas to a pressure equal to the pressure in the compression furnace, heating and isothermal exposure. After welding, the process jacket is removed from the compression furnace, disassembled, removed

0 of it is a bimetallic vessel and reused.

Due to the installation of welded parts in the technological shirt with a gap and filling it with inert

gas to a pressure equal to the pressure in the compression furnace, the process jacket is prevented from contacting the parts being welded and is not welded to them and does not

0 is deformed, which allows to improve the quality of welding, reduce labor intensity and reuse the same process jacket for the manufacture of bimetallic

5 vessels.

An example. For the manufacture of a bimetallic steel vessel clad from inside with silver, a silver blank is prepared that rotates the shape of the vessel. Then the contacting surfaces of the vessel and the cladding layer are ground and degreased, for example, with carbon tetrachloride, after which it is set

5, a cladding layer inside the vessel, sealing their edges and creating between them a vacuum of about 3-10 mm Hg. After checking the density of the junction of the vessel and the cladding layer

Q is placed in a steel technological jacket, after sealing of which it is installed in a compression furnace. The sealed gap between the process jacket and the vessel with the cladding layer is filled with an inert gas under pressure, at the same time creating an equal excess pressure of air in the chamber of the compression furnace. Then heat the oven

3 10947074

up to t 800 ° С, increase over 30 minutes in comparison with the known method, with a subsequent decrease in the quality of the welded joint

temperature up while maintaining and reduce the complexity of the process

pressure. Next, the pressure is removed and due to the elimination of welding

the cooking is cooled together with the stove. After 5 shirts to the cladding layer and the vessel is removed from the shirt by many things, reuse it, improve

The proposed method of manufacturing the mechanical contact of the cladding

metal vessels allows deposition with vessel material.

Claims (1)

METHOD FOR PRODUCING DIFFUSION BIMETALLIC VESSELS using a technological shirt, in which the cladding layer is installed inside the vessel, a vacuum is created between their contacting surfaces, the assembly is placed in a compression furnace, heated and pressure is created in it, characterized in that, in order to improve the quality welding by improving the contact of the cladding layer with the material of the vessel, reducing the complexity of the process and the repeated use of the technological shirt by eliminating welding Tehnological shirt to the workpiece, a vessel with a cladding layer is set in the processing jacket with clearance and fill it with an inert gas to a pressure equal to the pressure in the compression oven.