Processing of high temperature alloys
AssigneeUnited Kingdom Atomic Energy Authority
InventorAndrew R. Jones
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Abstract
A method of producing products from a mechanically alloyed, dispersion strengthened iron-base powder comprises consolidating the powder and working the consolidated body to the desired product shape. To obtain a desired grain size in the product, the process includes at least two stages of recrystallization annealing which may be effected after consolidation or alternatively at least one of the recrystallization anneals may be carried out while the material is still in powder form.
Claims16
A method of producing products composed of a mechanically-alloyed, dispersion-strengthened iron-base material comprising the steps of consolidating the alloy, in its mechanically alloyed particulate form, and processing the consolidated body to the desired product shape, the improvement comprising subjecting the alloy to at least two recrystallisation anneals, at least the second and any further recrystallisation anneals being preceded by a working operation which imparts stored internal energy to the body.
A method of producing a powder metallurgical alloy comprising mechanically alloying the constitutents of the alloy and subjecting the alloy, while still in its mechanically alloyed particulate form, to recrystallisation annealing.
A method of producing products composed of a mechanically-alloyed, dispersion-strengthened iron-base material having a composition of 14% chromium, 1% titanium, 0.3% molybdenum, 0.25% yttria and the balance iron produced by mechanically alloying a titanium/molybdenum/chromium powder, an iron powder and yttria powder, comprising the steps of consolidating the alloy, in its mechanically alloyed particulate form, and processing the consolidated body to the desired product shape, and subjecting the alloy to at least two recrystallisation anneals, at least the second and any further recrystallisation anneals being preceded by a working operation which imparts stored internal energy to the body.
Dependencies are inferred from the claim text.