A deformation-driven solid-phase extrusion device and a method for preparing alloy rods in one step using the device

Abstract

A deformation-driven solid-phase extrusion device and a method for preparing alloy rods in one step using the device. The invention belongs to the technical field of powder metallurgy. The invention aims to solve the technical problems that an external heating source is required in the process of preparing alloy structural materials by powder metallurgy, time-consuming and energy-consuming, and the structure of the obtained alloy material is not refined and coarse enough, and the porosity is large and not compact enough. The device includes a stirring head, an extruding container and an ejector rod. The agitating head is an integrated structure with a hollow channel composed of an upper mounting body and a lower working body. The outer surface of the lower working body is provided with a drag reducing groove, and the lower working body is placed in the squeezing container. In the groove, the ejector rod is placed in the hollow channel of the stirring head. Method: Put the alloy powder in the extrusion container, apply pressure with the stirring head and rotate at high speed to achieve large plastic deformation and friction deformation heat input, sinter the alloy powder and make it extrude along the hollow channel of the stirring head, and obtain ultra-fine crystals in one step Alloy bars. The method of the invention has low cost, high efficiency, excellent performance, energy saving and environmental protection.

Description

technical field [0001] The invention belongs to the technical field of powder metallurgy, in particular to a deformation-driven solid-phase extrusion device and a method for preparing alloy rods in one step using the device. Background technique [0002] Metal structural materials play an important role in the construction of the national economy. In order to meet the higher requirements of social development and national security for structural materials, new material preparation methods have become an important way to break through the limitations of traditional materials. Powder metallurgy methods, including hot pressing sintering, hot isostatic pressing, plasma discharge sintering, etc., are widely used in aerospace, transportation, power electronics and other industries. As a classic method of preparing solid-phase materials, powder metallurgy has the advantages of superior performance, environmental protection, energy saving, and low cost compared with liquid-phase pre...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the technical problems that an external heating source is required in the process of preparing alloy structural materials by powder metallurgy, time-consuming and energy-consuming, the microstructure of the obtained alloy material is not refined and coarse, and the porosity is large and not dense enough, the present invention proposes a sintering method. Introducing large plastic deformation and deformation heat generation in the process to realize the device and method for the one-step preparation of alloy rods by deformation-driven solid-phase extrusion powder

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