Production method for Fe-Ni based heat-resistant superalloy
US10196723B2 · kind B2 · utility
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Key dates
| Filing date | Mar 18, 2015 |
| Grant date | Feb 5, 2019 |
| Priority date | — |
| Expiry date | Jun 18, 2035 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C19/056
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A production method for an Fe—Ni based heat-resistant superalloy inhibits abnormal grain growth and yields a fine crystal grain structure having an ASTM crystal grain size number of 9 or greater. The production method comprises at least a hot working step in which a material having a prescribed composition is subjected to hot working, wherein the hot working step includes at least a step in which the above material of 930 to 1010° C. is subjected to hot working so that the relation of (effective strain)≥0.139×(effective strain rate(/sec))−0.30 is satisfied in the entirety of the above material.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.