Novel powder metallurgy method for preparing nanometer or ultrafine structured titanium products
A kind of product and powder technology, which is applied in the thermomechanical consolidation process to dehydrogenate, consolidate and form the powder, which can solve the problems of long grain refinement time, grain growth, slow temperature rise/fall speed, etc., to achieve improved Grain refinement efficiency, high grain refinement efficiency, effect of reducing dehydrogenation time
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[0045] The present invention uses titanium hydride powder as raw material, prepares titanium hydride powder with nanocrystalline structure through high-energy ball milling process, and then consolidates into a blank through discharge plasma sintering, and then utilizes induction heating and hot extrusion to ball-mill the titanium hydride powder. The dehydrogenation of the green compact is combined with the densification process to produce a nearly fully dense block extruded titanium profile with high mechanical strength in a relatively short period of time. The technical means and features adopted in the present invention are as follows:
[0046] A. The grain size of titanium hydride powder is refined to nanocrystalline level (<100nm) by high energy ball milling.
[0047] Put the titanium hydride powder and the ball material ratio (the mass ratio of the grinding ball to the powder) into the ball mill jar together and fill it with argon and seal it to ensure the oxygen in the b...
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