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
Hauptverfasser: Li, Ling, Xie, Huasheng, Huang, Danzhong, Li, Hankun, Tan, Rui, Zhou, Jingyi
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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.
ISSN:1672-6421
2365-9459