Boron stainless steel powder and rapid solidification method
US4430115A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 27, 1980 |
| Grant date | Feb 7, 1984 |
| Priority date | — |
| Expiry date | May 27, 2000 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC22C33/0285
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
Alloys having composition similar to commercial precipitation-hardenable stainless steels, but modified by the addition of 1.4 to 2.4 wt % boron, are disclosed. The alloys are subjected to a rapid solidification processing (RSP) technique which produces cooling rates between .about.10.sup.5 -10.sup.7 .degree.C./sec. The as-quenched RSP ribbon or powder, etc., consists primarily of a metastable crystalline solid solution phase. The metastable crystalline phases are subjected to suitable heat treatments so as to produce a transformation to a stable multiphase microstructure, which includes borides; this heat treated alloy exhibits superior mechanical properties and thermal stability in conjunction with good corrosion and oxidation resistance.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.