The role of Ti, Zr and Ce in shaping of the Cr-Ni-Nb cast steel resistance to carburising

• Autorzy: Tęcza G. , Zapała R. , Kawalec M.
• Języki publikacji: EN

Abstrakty

PL

From the centrifugally cast Cr-Ni-Nb steel pipes, specimens were cut out and subjected to carburising for 100 hours in a mixture of charcoal (90%) and Na₂CO₃ (10%) at the temperatures of 950 and 1150°C. The specimens were cut in direction normal to the pipe axis and were examined by optical and scanning microscopy. As a parameter describing the resistance of the examined alloy to the carburising effect, the thickness of a carburised layer was accepted. It has been observed that additions of Ti and Zr, and of Ti+Zr+Ce introduced jointly, increase the thickness of the carburised layer, while the addition of Ce improves the alloy resistance to carburising. On the alloy surface, a layer composed of oxides, mainly of chromium, silicon and iron, has been formed. Changes in the chemical composition of the surface layer were examined by scanning microscopy.

Słowa kluczowe

EN

carburisation; austenitic cast steels Cr-Ni; microadditives; microstructures

PL

nawęglanie; stal austenityczna; mikrododatki; mikrostruktury

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2008
• Tom: Vol. 8, iss. 3s
• Strony: 144--148
• Opis fizyczny: Bibliogr. 11 poz., rys., tab., wykr.

Twórcy

autor

Tęcza G.

• AGH, Faculty of Foundry Engineering, Department of Cast Alloys and Composites Engineering, Reymonta street 23, 30-059 Cracow, Poland

autor

Zapała R.

• AGH, Faculty of Foundry Engineering, Department of Cast Alloys and Composites Engineering, Reymonta street 23, 30-059 Cracow, Poland

autor

Kawalec M.

• AGH, Faculty of Foundry Engineering, Department of Cast Alloys and Composites Engineering, Reymonta street 23, 30-059 Cracow, Poland

Bibliografia

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• [8] G. Palasantzas, H. J. Kooij, J. Th. M. De Hosson, Carbon induced metal dusting of iron-nickel-chromium alloy surfaces: a scanning auger microscopy study, Applied Surface Science no 229 (2004) 190-196.
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