SU1171137A1 - Method of obtaining articles from low-plastic alloys - Google Patents

Abstract

METHOD FOR PRODUCING PRODUCTS FROM LOW-PLASTIC ALLOYS, including pressing the billet in a shell of easily deformable metal, characterized in that, in order to improve the quality of the products during pressing, the billet and the shell are deformed at different speeds, where V is the deformation rate of the billet; V shell strain rate. WITH

Description

I The invention relates to the processing of metals by pressure and relates to methods for the production of long products from m; 1 plastic alloys, which can be used in mechanical engineering. The purpose of the invention is to improve the quality of products from low-plastic alloys. Fig. 1 shows the moment of placement of the preform in the shell in the container re of Fig. 2 — an intermediate moment of pressing; FIG. 3 shows the final moment of pressing. The blank 1 in the shell 2 is placed in the container 3 and pressed into the drill 4 through the wad 5 at speed V. At the same time, the punch 6 presses the casing 2 at a speed V, with, 0,6-0,95. The difference in the speeds of movement of the workpiece and the shell causes the occurrence of forces on the contact surface, working in the same direction as the pressing force. . In the event that / V,; 0.6, the flow velocity of the peripheral layers of the workpiece exceeds the velocity of the centrifugal 72 layers, which leads to internal cracks. If V;, / V 70.95, then the blank is inserted into the shell. According to the proposed method, products are manufactured from alloys TsN-6 and TsN-12. In the quality of the workpiece is used ingots processed on a lathe 80 mm and a height of 120 mm. As a shell serves as a glass of steel 35X with a wall thickness of 12.5 mm. Heated to 1200 C, the workpiece is placed in the shell, heated to, and pressed, and mm / s, V 250 mm / s. Such a ratio of speeds ensures a high degree of structure study, a slight, within the admission limits, scatter of mechanical properties. The study of macro- and micro-shpifa showed no cracks. The quality of the products obtained meets the requirements. The use of the proposed method is. The base of obtaining products from low-plastic alloys ensures their high quality and gives an economic effect of about 10 thousand rubles. in year.

FIG. 2

/ / / /

four

/ /

Fig.Z

Claims (1)

METHOD FOR PRODUCING PRODUCTS FROM MELOPLASTIC ALLOYS, including pressing a workpiece in a shell of easily deformable metal, characterized in that, in order to improve the quality of products during pressing, the workpiece and shell are deformed at different speeds, with V./V ,=0.6- 0.95, where V _{1 the} speed of deformation of the workpiece; V ₂ ~ the rate of deformation of the shell.