Abstract
Metal powders produced by mechanical milling show the specific microstructures and properties. With these merits preserved, the powders should be combined into a large size compact. Saito et al. and Kimura et al. have succeeded in consolidating the iron powders into 1 ∼ 2.5 mm thick sheets by sheath rolling at a relatively low temperature of 973K. Based upon their success, we have attempted to apply caliber rolling for consolidating the powders into a large bar (φ11 × 1000 mm). The sheath can was filled with pure iron powders, sealed in vacuum, and then rolled. When the rolling temperature was 973K, rolling reduction of more than 80% was enough to make sound compacts of >10 mm diameter with fine microstructure and relative density larger than 99.6%. When the rolling reduction was 90%, the consolidation was accomplished in a wide range of rolling temperature between 1273K and 823K. At 823K and 873K, the sound consolidation could be realized without recrystallization. The tensile propertie s were better than those of the HIP treated compact. Hence, the solid-state joining is confirmed to occur much easier in the present method than in the HIP method.
Original language | English |
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Pages (from-to) | 480-485 |
Number of pages | 6 |
Journal | Tetsu-To-Hagane/Journal of the Iron and Steel Institute of Japan |
Volume | 87 |
Issue number | 7 |
DOIs | |
Publication status | Published - Jul 2001 |
Externally published | Yes |
All Science Journal Classification (ASJC) codes
- Condensed Matter Physics
- Physical and Theoretical Chemistry
- Metals and Alloys
- Materials Chemistry