High strength, high ductility titanium-alloy and process for producing the same
US6063211A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Feb 7, 1997 |
| Grant date | May 16, 2000 |
| Priority date | — |
| Expiry date | Feb 7, 2017 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C14/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high strength, high ductility titanium alloy comprising O, N and Fe as strengthening elements and the balance substantially Ti, the contents of the strengthening elements satisfying the following relationships (1) to (3): PA1 (1) from 0.9 to 2.3% by weight of Fe, PA1 (2) up to 0.05% by weight of N, and PA1 (3) an oxygen equivalent value Q, which is defined by the formula mentioned below, of 0.34 to 1.00 EQU Q=[O]+2.77[N]+0.1[Fe] wherein [O] is an oxygen content (% by weight), [N] is a nitrogen content (% by weight) and [Fe] is an iron content (% by weight), the titanium alloy having a tensile strength of at least 700 MPa and an elongation of at least 15%. Part of Fe may be replaced with Cr and/or Ni. Fe, Cr and Ni may be introduced from a carbon steel or stainless steel, or they may be introduced from sponge titanium containing these elements.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.