SU856636A1 - Method of working materials by pressure - Google Patents

Description

(54) METHOD FOR TREATING METALS BY PRESSURE

The invention relates to the processing of metals by pressure. The invention can most effectively be used in the manufacture of products with improved mechanical properties, achieved through the study of material with high degrees of deformation. There is a method of metal forming, including the extrusion of the workpiece through the hole of the matrix into a closed cavity, the volume of which increases during processing by an amount equal to the increment of the amount of extruded material l. The disadvantage of the known method is determined by the low physicomechanical properties of the treated material. The aim of the invention is to improve the physicomechanical properties of the material by increasing the total degree of deformation and reducing the anisotropy. This goal is achieved by the fact that according to the method of processing a material by pressure, which includes extrusion of the workpiece through the die hole into a closed cavity, the volume of which is increased during processing by an amount equal to the increment of the volume of extruded material, the crushed material is deposited in the said closed cavity. This method of processing materials by pressure allows one to obtain a material with improved mechanical properties in one operation while maintaining or slightly changing the forca of the original preform. The drawing shows a diagram of the proposed method of metal forming. The treatment is carried out by extrusion punch 1 of the workpiece 2 through the matrix 3 with a hole diainetra d from the container 4 into the cavity of the container 5, in which the punch b creates pressure allowing the draft extruded through the matrix of the billet to reach the diameter D of the container 5, the cavity of the container 5, the punch 6 is retracted. At the same time, the volume of the cavity of the container 5 increases. It is cast by an amount equal to the volume of the extruded material. The diameter D of the cavity of the container 5 may be either flat or different from the diameter O of the cavity of the container 4.

It is required to obtain a product with a diameter of 100 mm D from diameter O and 80 mm, deformed by 99%. Total stretch L.

CD S

 Hp) 100, The intermediate diameter is determined from the ratio

. 2c.

The proposed method of processing material by pressure is characterized by a favorable volumetric stress state scheme and allows to deform even low-plastic materials, to work out the structure in one operation, which leads to a significant improvement in their mechanical properties.

The economic effect is created by increasing productivity and increasing the service life of parts made from the material processed by the proposed method.

Claims (1)

Invention Formula The method of processing metals by pressure 5, including the insertion of the workpiece through the die hole into the closed cavity, the volume of which is increased during processing by an amount equal to the increment of the volume of the extruded material, characterized in that, in order to improve the physical and mechanical properties of the matter by increasing the total the degree of deformation and reduction of anisotropy, the depressed material is precipitated in a closed YKai cavity. Sources of information taken into account in expert examination 1, Korneev N. I, et al. Pressure treatment of refractory metals and alloys. M., Metallurgists, 1967, p.216, fig. 133.