Hydrometallurgical process for producing finely divided spherical maraging steel powders containing readily oxidizable alloying elements
US4772315A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 4, 1988 |
| Grant date | Sep 20, 1988 |
| Priority date | — |
| Expiry date | Jan 4, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2999/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A process for producing spherically shaped maraging steel powder particles containing a readily oxidizable metal comprises forming an aqueous solution containing the metal values of iron, cobalt, nickel and molybdenum, in a predetermined ratio, forming a reducible solid material from the solution reducing the solid material to form metallic poweder particles. These particles are agglomerated with a predetermined amount of a second group consisting 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 and droplets are formed. The droplets are 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.