SU1452658A1 - Method of compacting billets from pulverulent materials with internal coordinate grid - Google Patents

Abstract

The invention relates to powder metallurgy, in particular, to methods for producing preforms of powder materials with an internal coordinate grid, designed to study plastic deformation of the material. The aim of the invention is to improve the accuracy of the determination of plastic deformations and to expand the scope of application of the method at the expense of. determination of deformation during hot isostatic pressing. To obtain blanks with an internal coordinate grid, a jig with hollow elements is pushed into the capsule, the configuration and dimensions of which correspond to the required coordinate grid. A pressed powder is loaded into a capsule, and a powder of the same material of the same chemical property containing a radioactive element of one of the alloy components is loaded into the hollow elements of the container. The conductor is then removed from the capsule. The capsule is evacuated and sealed, subjected to hot isostatic pressing and subsequent deformation. 1 ill., 1 tab. (L

Description

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The invention relates to powder metallurgy, in particular, to methods for producing preforms of powder materials with an internal coordinate grid, intended to investigate plastic deformations of a material.

The purpose of the invention is to increase the

Compared with the known method being enclosed in a capsule

determination of plastic deformations of the conductor with rods from another, mats of the powder material and plant material, compressing the field of application of the method by determining the deformation during hot isostatic pressing.

The use of radioactive elements provides a more precise definition of the strain, due to the fact.

The use of radioactive elements gives a more precise definition of the strain, due to the fact.

The drawing shows the scheme that the initial billet is chemically and physically homogeneous and thus carries more reliable information about the changes occurring in it. Comparative data known and proposed methods for accuracy

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method.

In a container with a diameter of 500 mm and a height of 1720 mm with a closed lower end install a removable jig having a hollow tube.

In the capsule 1 with a welded bottom, an upper cap 2 is installed, having loading windows 3 for pouring the powder into the capsule. In the upper cracker 2, thin-walled tubes 4 are attached at the required distance and height. Inside the tubes 4, rods 5 are placed, the diameter of which is equal to the inner diameter of the tubes, and the height of the rods is equal to the height of the tubes. To prevent seeding powder from falling between the walls of the tubes and rods, there are shoulders 6 with sealing elements 7 on the ends of the tubes. Burts 6 with elements 7, 5 rest on the direction of washer 8. Rods 5 serve to preserve cavities, i.e. to prevent powder from entering the tubes when filling in the strain definitions are given in the table.

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In addition, the use of a method in which radioactive elements are used to create a coordinate grid allows one to obtain information on plastic deformation during hot isostatic pressing.

Claims (1)

Invention Formula The method of obtaining blanks of powder materials with an internal coordinate grid, designed to determine plastic deformations, including the placement of rods in the capsule, the configuration and size Autoradiograms were obtained on the marketed metal prepared on the required planes by the method of contact autoradiography, where dark areas are clearly distinguished on a white background at the points where the labeled powder is introduced. Compared with the known method being enclosed in a capsule a conductor with rods of material other than compressible, a conductor with rods of material other than compressible, The use of radioactive elements gives a more precise definition of the strain, due to the fact. that the original preform is chemically and physically homogeneous and thus carries more reliable information about the changes occurring in it. Comparative data known methods proposed for accuracy deformation determinations are given in the table. In addition, the use of the method in which radioactive elements are used to create a coordinate grid provides information on plastic deformation during hot isostatic pressing. Invention Formula The method of obtaining blanks of powder materials with an internal coordinate grid, designed to determine plastic deformations, including the placement of rods in the capsule, the configuration and size Research Institute named after the capsule and its vibrocompaction. 49 which correspond to the coordinates- Prepared in such a manner a horse grid, filling the capsule of powder material, evacuation and sealing, capsules, characterized in that, in order to improve the accuracy of plastic deformation and spread the field of application of the method by determining the deformation than isostatic pressing, the rods are hollowed out, and after filling into the capsule, the container is filled with a slug of high-speed steel R6M5FZ-MP. After vibration compaction of the blueberries, powder of the same steel grade and the same chemical composition containing the radioactive sulfur isotope S-35 is poured through the hollow elements of the conductor. Then, the conductor, together with the tubes, is removed, the capsule is evacuated and sealed. The capsule thus prepared is heated to maximum temperature, hot isostatic pressing and subsequent deformation redistribution. On macro sections of pressing and prodorph45 50 55 The powdered material is injected into the cavities of the rods, the powder material of the same chemical composition containing the radioactive element of one of its constituents, and the rods are removed before evacuating.  which correspond to the coordinate grid, filling the capsule of the powder material, evacuating and sealing, capsules, characterized in that, in order to improve the accuracy of plastic deformations and the spread of the field of application of the method by determining the deformation during hot isostatic pressing, the rods are hollow, and the last filling in the capsule The powdered material is injected into the cavities of the rods, the powder material of the same chemical composition containing the radioactive element of one of its constituents, and the rods are removed before evacuating. deformations Direction definitions strain in harvesting In the longitudinal direction blanks 95.0 . In cross direction blanks 95.0 In the longitudinal direction blanks 95.0 In cross direction blanks 95.0 Accuracy of deformation,% By a known method not provided 50-60 60-70 70-80 five