Prevention of burn-on defect on surface of hydroturbine blade casting of ultra-low-carbon refining stainless steel
The burn-on sand is common surface defect encountered in CO2-cured silicate-bonded sand casting of hydroturbine blade of ultra-low-carbon martensitic stainless steel, its feature, causes and prevention measures are presented in this paper. Experiments showed that the burn-on defect is caused by oxid...
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Veröffentlicht in: | China foundry 2008-08, Vol.5 (3), p.190-193 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The burn-on sand is common surface defect encountered in CO2-cured silicate-bonded sand casting of hydroturbine blade of ultra-low-carbon martensitic stainless steel, its feature, causes and prevention measures are presented in this paper. Experiments showed that the burn-on defect is caused by oxidization of chromium in the molten steel at high temperature and can be effectively eliminated by using chromium-corundum coating. |
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ISSN: | 1672-6421 2365-9459 |