| Autor: |
Napara-Volgina, S., Kostyrko, L., Radomysel'skii, I. |
| Zdroj: |
Soviet Powder Metallurgy & Metal Ceramics; 1983, Vol. 22 Issue 10, p824-842, 19p |
| Abstrakt: |
The thermal and thermomechanical treatment of P/M steels has a number of distinguishing features linked with their porosity: Heating for quenching must be performed in a protective atmosphere; the thermal conductivity and hence hardenability of P/M steels are less than those of rolled steels; consequently, it is necessary to intensify the cooling of these steels in quenching. Apart from this, the presence of numerous macro- and microdefects in P/M steels results in a shift of critical points in the heating and cooling of these steels. The thermomechanical treatment of P/M steels must be performed with larger reductions compared with rolled steels in order to attain maximum density in the porous sintered blanks used. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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