ISSN:
1573-9066
Source:
Springer Online Journal Archives 1860-2000
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
Summary By subjecting steel powders to hydrostatic pressing with subsequent sintering, re-pressing, and annealing, it is possible to produce parts having the required shape and a density uniformly distributed throughout their volume. To obtain compacts of a given density, hydrostatic pressure may be reduced by a factor of 1.5–2 compared with that required in pressing in metal dies. Hydrostatic compaction under a pressure of 8000–10,000 atm with sintering at 1360–1400°C can yield steel-powder parts with a residual porosity of 4–6%; after cold hydrostatic re-pressing at 8000 atm and annealing at 800–1000°C, the porosity may be reduced to 2–4%. By employing higher compaction pressures (of the order of 15,000 atm), it is possible to produce, after sintering, parts with a density close to theoretical, requiring no further densification.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00775512
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