Deformation method and device for gradient temperature wedge pressure for injecting and depositing porous material

Abstract

Disclosed is a ladder temperature band-pressing deforming method and device, which is made of spraying settling cellular materials. The utility model puts blanks into a ladder temperature mold of which the temperature increases step-by-step from the top to the bottom, the lower surface of the blanks contacts the heating bottom board, when the blanks which are ready to be used also has temperature gradient from the top to the bottom, using wedge indenters to compress partially, and the blanks are accumulated from local deformation to integral large deformation step by step. The utility model comprises a mold with a heating and cool-off device, a bottom board with a heating tube and a wedge indenter. The utility model has the advantages of reasonable structure, simple art work. After bringing in ladder temperature, weakening resistance of deformation of the blanks from the top to the bottom, overcoming the phenomenon of compact ill effect of the bottom of the blanks which is caused by frictional force of the mold wall produced in the process of molding and compacting of the large blanks, thereby weakening the briquetting pressure. The utility model is especially applicable to the compacting manufacturing procedure of large spraying settling cellular materials, and expanding application foreground of large units of spraying settling cellular materials.

Description

technical field [0001] The invention discloses a metal material densification processing method and device, in particular to a gradient temperature wedge pressure deformation method and device for spray deposition porous material for densification processing of large spray deposition materials. Background technique [0002] As a new type of material preparation technology, spray deposition technology has a series of advantages, such as high cooling rate of deposited blank, fine and uniform structure, and small degree of alloy composition segregation. The degree of oxidation of the material is small, the process flow is short, and the degree of pollution of the material is reduced; near net shape, high productivity, low production cost, etc. Spray deposition technology is especially suitable for the manufacture of large-sized materials that are difficult or impossible to manufacture by ordinary casting technology due to severe segregation, and the cost of powder metallurgy te...

AI Technical Summary

Problems solved by technology

[0003] The main methods that can be used for the densification and plastic deformation of spray-deposited porous blanks are: hot isostatic pressing, hot extrusion, hot rolling, hot compaction, etc. These processes usually involve expensive equipment, complex production processes, long production cycles, and high production costs. High, which limits its large-scale application; especially in large-scale spray-deposited porous materials, the tonnage of the press is very high for densification by molding, and it has always been a difficult problem to densify large-scale spray-deposited materials on small-tonnage presses. question

The method of uniform temperature wedge pressing (uniform temperature of each part of the blank) solves the above problems to a certain extent, and realizes the densification of large spray deposition materials in small tonnage presses, especially in wide plate types with small thickness The blank has advantages, but when pressing a thick blank, the deformation will mainly be concentrated on the upper part of the blank, and the overall blank, especially the bottom, has not achieved complete densification, which is mainly due to the gap between the blank and the mold wall. The existence of friction between them makes the pressing force gradually attenuate from top to bottom along the height of the billet.

That is to say, when the overall temperature of the billet is evenly distributed, the deformation resistance of the billet is consistent, and the pressing force on the upper part of the billet reaches the pressing required for densification, while the pressing force on the lower part of the billet has been consumed by the friction of the die wall and has not Pressing force required to achieve densification of the billet, resulting in incomplete densification of the bottom of the billet

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