A method for preparing metal thin-walled microtubes
A technology of thin metal and micro-tubes, which is applied in metal processing equipment, manufacturing tools, forming tools, etc., can solve the problems of unfavorable processing of dimensional precision pipe fittings, difficulty in meeting the forming requirements of metal thin-walled micro-tubes, etc., to avoid the possibility of workpiece fracture, The effect of high concentricity and reduced scrap rate and defective rate
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[0030] The present invention will be further explained below in conjunction with the specific implementation of examples.
[0031] A method for preparing metal thin-walled microtubes, comprising the steps of:
[0032](1) Pretreatment: The metal raw material is processed by severe plastic deformation to obtain a microstructure with ultra-fine grains, so that the metal material has as high a plasticity as possible, so as to fully refine the grain and reduce the intermediate phase size, reducing the anisotropy of the material; depending on the processed material, the limit values of the parameters of the severe plastic deformation are different, but the superplastic deformation conditions are met;
[0033] (2) Billet making: The raw material pretreated by severe plastic deformation is press-processed and machined to make a round tube-shaped rough billet, and then the rough tube billet is finely ground on a precision grinder to form a fine tube billet; the fine tube billet One ...
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