Method of sintering an injection-molded article
US4836980A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 22, 1988 |
| Grant date | Jun 6, 1989 |
| Priority date | — |
| Expiry date | Jan 22, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB22F2201/20
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
In a method of sintering an injection-molded article of raw material powder and organic binder, the injection-molded article already debinderized is initially heated up to a certain reaction temperature at which residual binder is removed from it. In subsequent decarburizing step, the residual binder is removed from the molded article under atmospheric or reduced pressure, while being supplied with H.sub.2 gas. Thereafter, in a reducing and sintering step, the molded article is heated up to a sintering temperature and is held at this temperature under reduced pressure for a predetermined period, with H.sub.2 gas being supplied. H.sub.2 content of the atmosphere in the decarburizing step is kept higher than that in the reducing and sintering step.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.