Radial Forging Strain-Induced Semi-Solid Extrusion Process for Waveguides

Abstract

The radial forging strain-induced semi-solid extrusion process of the waveguide first preheats the metal bar made of copper alloy, aluminum alloy, or magnesium alloy used to form the waveguide, and repeatedly upsets and elongates it. Obtain a distorted metal bar stock that stores distortion energy; then use the waste heat of the distorted metal bar stock to carry out radial forging and then quench it to obtain a radially forged distorted billet with a shrinkage rate of more than 40% in the radial section; then , performing secondary remelting to obtain a waveguide semi-solid billet with a solid phase fraction between 40% and 60%; finally, performing semi-solid extrusion to obtain a waveguide. The invention has the advantages of small required forming force and high material utilization rate , The characteristics of high mechanical properties of formed parts.

Description

technical field [0001] The invention belongs to the technical field of waveguide manufacturing, in particular to a radial forging strain-induced semi-solid extrusion process for waveguides. Background technique [0002] Semi-solid processing is a metal forming method proposed by Professor Flemings of the Massachusetts Institute of Technology in the 1970s. The so-called semi-solid processing is to heat the metal to the temperature between the solidus line and the liquidus line, and keep it warm for a certain period of time to obtain spherical or nearly spherical grains, and then shape them, while semi-solid extrusion The pressing process refers to heating the semi-solid billet to a semi-solid state with about 50% volume of liquid phase and then placing it in the preheated mold cavity, then closing the mold to realize the filling and flow of the metal melt, and applying high mechanical force The pressure makes the metal melt solidify under high pressure and undergoes a small ...

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Problems solved by technology

The disadvantages are: due to the large amount of electric energy consumed in the electrolysis process, the manufacturing cost is relatively high; (3) Welding and splicing waveguides refer to welding or splicing of copper plates, and the waveguides are drawn without deep drawing equipment. , Welding waveguides are often used to manufacture waveguide components, but in most cases it is only used for laboratory research and testing; (4) Casting waveguides mainly include lost wax casting, mercury mold casting, plaster mold or ceramic mold casting, etc. In particular, lost wax casting has low cost and simple process, so it is widely used. However, the cast waveguide has coarse grains, uneven structure distribution, shrinkage porosity, pores and other defects, and the mechanical properties of the product are poor.

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