SU1629155A1 - Method of purifying working medium of gas compaction chamber - Google Patents

Abstract

The invention relates to hot isostatic pressing using argon as the working medium. The goal is to reduce energy consumption and increase the service life of the gas-stat. Argon, previously subjected to catalytic and adsorption purification, is fed to a gasostat container, in which a tank with a titanium sponge is installed under the billet. The temperature in the area where the container is located is maintained at a temperature of 800-1300 ° C. In this case, the nitrogen removal cycle is carried out in the process of gas stabilization of the workpiece. 1 il.

Description

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The invention relates to powder metallurgy, in particular to hot isostatic pressing using argon as the working medium.

The goal is to reduce energy consumption and increase the service life of the gas-stat.

The drawing is a schematic diagram of the gas switch.

The method is carried out as follows.

Argon, previously subjected to catalytic and adsorption purification, is fed to a gasostat container in which a tank with a titanium sponge is installed. The container is placed under the workpiece in the zone of the container with a temperature of 800-1300 ° C. In this case, the working environment is cleaned from nitrogen during the gas-stabilization cycle of the workpiece. The temperature in the area under the workpiece varies from 100 ° C on the surface of the bottom cover of the container to the gas-setting temperature under the workpiece. At the same time, at any possible gas setting temperature in

The container under the workpiece has an area with an optimal cleaning temperature, where the tank with a titanium sponge is located. Thus, the capacity does not occupy the working volume of the container. The temperature range of heating the titanium sponge corresponds to the optimum temperature by which it absorbs the gaseous products released from the tooling, i.e., it provides the most complete degree of purification. At the same time, the combination of hot isostatic pressing and cleaning operations makes it possible to refuse to carry out special cleaning cycles and thereby reduce energy costs.

The gasostat contains a gas cylinder station 1, a burning furnace 2, a refrigerator 3, an adsorber 4, a compressor station 5, a refrigerator 6, a container 7 with an upper 8 and lower 9 end caps, a container furnace 10, a blank 11, a capacity 12 with a titanium sponge, a spacer 13, Refrigerator 14 on the argon return line to the gas balloon station.

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ABOUT

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Example. Argon from the gas cylinder mill-cooler 14 is directed at a pressure

1 under pressure of 20.0-40.0 MPa -20.0-40.0 MPa back to the gas cylinder

steps on catalytic cleaning in the furnace station.

2, where oxygen, hydrogen are burned, corner. During the next cycle, portions of argon are added to the main hydrochloride through the refrigerator 3 for 5 ku to restore adsorption purification to adsorber 4, where the loss of working medium is new. When cleaned from water vapor and carbon dioxide. The argon purified in this way enters the compressor station 5, where it is compressed to 0 MPa and fed into the cavity of the container. Container 1 furnace 10 is turned on and the argon medium in the container is heated, while pressure rises up to the worker. Moreover, the temperature of the medium in the height of the container is not the same. In the area under the billet, the temperature of 15 during the heating of the medium in the process reaches 800-1300 ° C. During the heating process, it is purified from nitrogen. This heating is combined

With working heating, placing the cassette in a certain zone of the container, namely, under the billet, cleaning the working argon medium is carried out at elevated temperatures and pressure, which allows the cleaning process to be carried out more efficiently.

In the subsequent cycle, argon is purified only from those impurities that come in new batches.

As titanium loses its properties, the container is removed and replaced with a new one. The use of the proposed method of cleaning the gasostat working medium allows to reduce energy consumption by eliminating

Intensive convective currents arise in the working cavity. Circulation of the working medium is created, argon passes through the tank 12 with a titanium sponge made of perforated material.

The tank is in the process of nitriding titanium, argon is cleaned from nitrogen, which was originally contained in it and which was desorbed when heated to accommodate a container with a sponge in a container, which makes it possible to clean the working

container and workpiece surfaces. The single-25 CP6DU and from the desorbed gases, which temporarily undergo the process of oxidation of titanium and, with increasing quality, the working medium is cleared from the stripping of the workpiece to increase the service life of the gasostat container.

oxygen.

The process of purification from nitrogen and oxygen proceeds at the working pressure of gas stabilization, which contributes to more efficient purification. The efficiency of the titration and oxidation of titanium depends on temperature and pressure, with increasing temperature and pressure, the efficiency of the cleaning process increases.

After the work is finished, the heating is stopped, the container with the working medium is cooled and practically pure argon through

portions of argon are added to restore the loss of working medium. At each heating of the medium in the process of purification from nitrogen. This heating is combined

In the subsequent cycle, argon is purified only from those impurities that come in new batches.

As titanium loses its properties, the container is removed and replaced with a new one. The use of the proposed method of cleaning the gasostat working medium allows to reduce energy consumption by eliminating

to increase the service life

gas trainer.

Claims (1)

Invention Formula The method of cleaning the working environment of the gasostat, including catalytic and adsorption cleaning and nitriding of titanium, characterized in that, in order to reduce energy consumption and increase the service life of the gasostat, nitration is carried out in the process of gasification by placing a tank with a titanium sponge in the gasostat container under the billet. LwaJ