Segregation-free metallurgical blends containing a modified PVP binder
US5432223A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Aug 16, 1994 |
| Grant date | Jul 11, 1995 |
| Priority date | — |
| Expiry date | Aug 16, 2014 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2998/00
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A novel high-performance binder system is provided for the fabrication of segregation-free iron based powder blends. The blends are prepared by using a binder system comprising thermoplastic resin polyvinylpyrrolidone and a suitable compatible plasticizer such as polyethylene glycol, and optional solid lubricants. The binder system enables the manufacture of segregation-free iron-based powder blends with high flow rate and compressibility, enhanced apparent density, green strength and transverse rupture strength, and low dimensional variations compared to unbonded powder blends and to blends made with PVP or PEG only as the binder.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.