Mould of pure titanium equal channel angular extrusion and process method

Abstract

The invention provides a mould of pure titanium equal channel angular extrusion and a process method. An integral concave mould design is adopted. A concave mould comprises a concave mould main body, a concave mould base and a concave mould cover plate; the mould of the pure titanium equal channel angular extrusion comprises an equal angular channel; the concave mould main body comprises the equal angular channel; the concave mould cover plate comprises a side face of the equal angular channel; and the concave mould main body and the concave mould cover plate are fastened by a bolt and a nut. The mould of the pure titanium equal channel angular extrusion disclosed by the invention adopts a novel mould structure of the integrated concave mould so that the extrusion force capable of being borne by the mould is increased; with the adoption of an isothermal extrusion technology, the extrusion of pure titanium with a close-packed hexagonal structure, higher rigidity and lower plasticity and the equal angular channel of an alloy thereof can be met; the mould is relatively simple in structure, and lubrication and fault treatment of the channel are convenient to carry out; and the service life of the mould can be prolonged to a certain extent.

Description

technical field [0001] The invention relates to a mold and a process method of equal-channel radial-angle extrusion, in particular to a mold and a process method of pure titanium equal-channel radial-angle extrusion, and belongs to the field of plastic processing equipment. Background technique [0002] Channel Angular Pressing (ECAP) is a method in which severe plastic deformation induces grain refinement and enhanced mechanical properties. After decades of research, the ECAP method has developed into one of the effective large plastic deformation methods recognized by the scientific community today. It can refine the grains of materials to submicron or even nanometer levels, and improve the limit of materials While increasing the strength, its plasticity basically does not decrease or only slightly decreases. In view of the outstanding advantages of this technology, it is increasingly used in engineering fields to improve the performance of conventional materials. Schola...

AI Technical Summary

Problems solved by technology

Due to insufficient mold design and process parameter selection, the indenter is bent and broken in the channel, resulting in many precedents for mold failure

Some domestic researchers use large ECAP corners to perform equal-channel angular extrusion on pure titanium at room temperature. It can be speculated that the extrusion force of ECAP at room temperature will be very large, and the tonnage of the press that needs to be equipped should also increase accordingly. Increased complexity of the structure

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