Ultra-high strength steel containing CaO, MgO, BaO or SrO having improved resistance to environmental stress corrosion cracking
US3966421A · kind A · utility
2Cited by
11References
15Claims
0Family size
Assignee
Inventors
Key dates
| Filing date | Jun 18, 1973 |
| Grant date | Jun 29, 1976 |
| Priority date | — |
| Expiry date | Jun 18, 1993 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY10T428/268
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
An ultra-high strength steel composition of matter having a substantially martensitic matrix with a dispersion therein of a critical amount of metal oxide particles and characterized by increased resistance to environmental stress corrosion cracking. The metal oxide particles are selected from the group consisting of CaO, BaO, MgO, SrO and mixtures thereof, in the range of 0.1 to less than 3 mole percent. A powder metallurgy process to produce articles of manufacture from the composition of matter is disclosed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.