| Autor: |
Lokshin, E. L., Bochvar, G. A., Borzetsovskaya, K. M., Kaputkin, E. Ya., Bolotina, T. I. |
| Zdroj: |
Powder Metallurgy and Metal Ceramics; December 1979, Vol. 18 Issue: 12 p857-861, 5p |
| Abstrakt: |
A characteristic feature of VT3-1 alloy granules is that, as their size decreases, their structure changes from dendritic to acicular and the a?-phase appears in them. The surface condition of these granules is characterized by the presence of films of the lower titanium oxides Ti2O3, Ti3O5, and Ti4O7. Hightemperature annealing in a vacuum dissolves the surface films. Effective consolidation of starting granules with films less than 350 Å thick is observed at temperatures of 900° C and higher. The presence of thicker surface oxide films on these granules has a marked adverse effect on the quality of resultant dense compacts. The ductility of compacts can be improved by subjecting them to cyclic heat treatment in thea +ß/ß transformation temperature range. Isostatic pressing of granules can be employed as a means of obtaining dense compacts having dimensions close to those of finished parts. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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