Hydrometallurgical process for producing spherical maraging steel powders utilizing spherical powder and elemental oxidizable species
US4787934A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1988 |
| Grant date | Nov 29, 1988 |
| Priority date | — |
| Expiry date | Jan 4, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F1/148
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for forming maraging steel alloys comprise forming an aqueous solution containing the metal values of iron, cobalt, nickel and molybdenum in a predetermined ratio, forming the reducible solid material from the solution, reducing the solid material to form metallic powder particles. These particles are entrained in a carrier gas and fed into a high temperature zone to form droplets. The droplets are cooled to form essentially spherical particles which are agglomerated with a predetermined amount of at least one readily oxidizable metal selected from the group consisting of aluminum, titanium and vanadium. The agglomerates are entrained in a carrier gas and fed into a high temperature zone to form droplets which are thereafter cooled to form essentially spherical shaped particles of a maraging steel alloy containing at least one readily oxidizable metal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.