Nanocrystal-containing titanium alloy and production method therefor
US9624565B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Nov 22, 2011 |
| Grant date | Apr 18, 2017 |
| Priority date | — |
| Expiry date | Nov 11, 2033 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22F1/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An alloy having an α′ martensite which is a processing starting structure is hot worked. The alloy is heated at a temperature increase rate of 50 to 800° C./sec, and strain is given at not less than 0.5 by a processing strain rate of from 0.01 to 10/sec in a case of a temperature range of 700 to 800° C., or by a processing strain rate of 0.1 to 10/sec in a case of a temperature range of 800° C. to 1000° C. By generating equiaxial crystals having average crystal particle diameters of less than 1000 nm through the above processes, a titanium alloy having high strength and high fatigue resistant property can be obtained, in which hardness is less than 400 HV, tensile strength is not less than 1200 MPa, and static strength and dynamic strength are superior.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.