Study of the Compaction of Metal Powders
| Autor: | TATSUZAWA, Kiyohiko, KOHARA, Shiro |
|---|---|
| Jazyk: | japonština |
| Rok vydání: | 1967 |
| Zdroj: | 東京大学宇宙航空研究所報告. 3(1_A):61-77 |
| ISSN: | 0563-8100 |
| Popis: | 粉末冶金法の基礎的技術である粉体の圧縮成形に関して,種々の金属粉末を用い,金型成形法により圧縮成形する場合の密度一成形圧力の関係式を比較検討した.そして粉末の形状,圧粉体の高さ一直径比,金型直径などの変化,および金型潤滑の圧縮成形に対する影響を調べた.さらに,降伏強さの極端に異なる場合,およびほぼ等しい場合の2元混合粉末を圧縮する場合の粉体の挙動についても研究を行なった. A detailed investigation of the compaction behavior of powders was carried out with many different metal powders using a cylindrical single action die. From the density-pressure relationship obtained, three formulas on powder compaction Bal'shin's, Heckel's, and Kawakita's, were evaluated and the constants in the formulas were related to the yield strength of metals. The effect of the particle shape, the ratio of hight to diameter of the compact, and the lubrication of die wall were studied. Then the compaction behavior of mixed powder of two different metals was investigated. The density of the compact of mixed powder of two different metals can be obtained by the calculation, assuming that the compact is composed of two layers of different metals. The difference between measured density and calculated value depends on the composition and the strength characteristics of the powder. When the difference between yield strengths of two metals is large, measured density appears a little higher than the calcurated value, and the discrepancy changes with composition and becomes largest for the composition of about fifty per cent in volume each other. 資料番号: SA0125032000 |
| Databáze: | OpenAIRE |
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