High density sintering method for powder molded products
US4448747A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 1, 1982 |
| Grant date | May 15, 1984 |
| Priority date | — |
| Expiry date | Sep 1, 2002 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC04B35/6455
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A high density sintering method for powder molded products by applying preliminary sintering to powder molded products previously molded into a predetermined shape and then applying hot isostatic press process to the sintered products thereby producing high density sintered product which includes the steps of loading the powder molded products into a movable heating furnace equipped with at least one heating means and having a heat insulating structure, introducing the heating furnace into an atmosphere chamber, applying preliminary sintering to the powder molded products in the heating furnace by the heating means while conditioning the inside of the atmosphere chamber to a vacuum or predetermined gas atmosphere, subsequently removing the heating furnace while maintaining the inside thereof at a high temperature from the atmosphere chamber and directly introducing the furnace into a high pressure vessel, thereafter, applying the hot isostatic press process to the sintered products in the furnace while charging a gas as a pressure medium under pressure into the high pressure vessel and elevating the temperature in the heating furnace by the heating means, thereby producing high den…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.