Examination of the process of activating sintering of high-speed steel powders by differential thermal analysis
- Institute of Materials Science, Kiev (Ukraine); and others
Intensification of technological processes of powder metallurgy is an essential condition for increasing the technical and economic indicators of production. It is therefore important to activate sintering by small additions which make it possible to reduce the process temperature and the energy losses. The process of sintering high-speed steel powders is activated by finely dispersed additions of carbon which, at the same time, make it possible to reduce the mass content of oxygen in blanks. Boron is one of the most active elements intensifying shrinkage of the high-speed steel in sintering. Complex additions Ni{sub 3}Nb-B and Ni-B are also used for these purposes. These additions make it possible to reduce by more than 30{degrees}C the sintering temperature in producing blanks with a relative density of 92-95 %. Nevertheless, the mechanism of sintering the high-speed steel with activated additions and the main relationships governing the process of formation of the structure of the material have been examined insufficiently. We examine the effect of boron-containing additions in compacts of a gas-dispersed powder of R6M5K5 high-speed steel on the position of the main critical points on the heating curves in the high-temperature range.
- Sponsoring Organization:
- USDOE
- OSTI ID:
- 237620
- Journal Information:
- Powder Metallurgy and Metal Ceramics, Vol. 34, Issue 1-2; Other Information: PBD: Jul 1995; TN: Translated from Poroshkovaya Metallurgiya; Nos. 1-2, 26-29(Jan-Feb 1995)
- Country of Publication:
- United States
- Language:
- English
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