| Autor: |
Farafonov, V. K., Shteinberg, M. M., Chadov, G. A., Cheremnykh, V. P., Mordanov, M. |
| Zdroj: |
Metal Science and Heat Treatment; March 1980, Vol. 22 Issue: 3 p214-217, 4p |
| Abstrakt: |
1.The creep strength of forgins from precipitation-hardening austenitic steel 37Kh12N8G8MFB depends to a considerable extent on the lead content. The creep strength changes most with increasing lead concentrations up to 0.001%. With >0.001% Pb the creep strength changes little.2.The negative effect of lead on time to failure is due to embrittlement of the metal, which is evident as low ductility and shortening of the second and absence of the third stage of creep.3.The lead in forgings is in the form of inclusions located in metal-primary carbide and metal-non-metallic inclusion boundaries.4.When the steel is melted in electric furnaces of large volume with casting of several ingots in succession the ingots most contaminated with lead and thus with the lowest creep strength are the first poured. |
| Databáze: |
Supplemental Index |
| Externí odkaz: |
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