Evaluation of High-temperature Physicochemical Interactions Between the H282Alloy Melt and Ceramic Material of the Crucible

• Autorzy: Pirowski Z.

Identyfikatory

DOI

10.2478/afe-2014-0091

• Języki publikacji: EN

Abstrakty

EN

Nickel alloys belong to the group of most resistant materials when used under the extreme operating conditions, including chemically aggressive environment, high temperature, and high loads applied over a long period of time. Although in the global technology market one can find several standard cast nickel alloys, the vast majority of components operating in machines and equipment are made from alloys processed by the costly metalworking operations. Analysis of the available literature and own studies have shown that the use of casting technology in the manufacture of components from nickel alloys poses a lot of difficulty. This is due to the adverse technological properties of these alloys, like poor fluidity, high casting shrinkage, and above all, high reactivity of liquid metal with the atmospheric air over the bath and with the ceramic material of both the crucible and foundry mold. The scale of these problems increases with the expected growth of performance properties which these alloys should offer to the user. This article presents the results of studies of physico-chemical interactions that occur between the H282 alloy melt and selected refractory ceramic materials commonly used in foundry. Own methodology for conducting micro-melts on a laboratory scale was elaborated and discussed. The results obtained have revealed that the alumina-based ceramic sexhibits greater reactivity in contact with the H282 alloy melt than the materials based on zirconium ompounds. In the conducted experiments, the ceramic materials based on zirconium silicate have proved to be a much better choice than the zirconia-silica mixture. Regardless of the type of the ceramic materials used, the time and temperature of their contact with the nickel alloy melt should always be limited to an absolutely necessary minimum required by the technological regime.

Słowa kluczowe

EN

nickel alloys; superalloys; melting; reactivity; metal/ceramic reaction; refractory materials

PL

stopy niklu; nadstopy; topienie; reaktywność; materiały ogniotrwałe

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2014
• Tom: Vol. 14, iss. 4
• Strony: 83--90
• Opis fizyczny: Bibliogr. 8 poz., fot., wykr.

Twórcy

autor

Pirowski Z.

• Department of Ferrous Alloys, Foundry Research Institute, ul. Zakopiańska 73, 30-418 Cracow, Poland

Bibliografia

• [1] Schwant, R., Shen, C. & Soare, M. (2013).New Materials Enable Unprecedented Improvement in Turbine Performance; Advanced Materials & Processes; ASM International.
• [2] Pike, L. New Advancements in Superalloys, Two New Structural Alloys for Gas Turbine Applications.www.asmindy.org/pikelee.htm.
• [3] HAYNES®282® alloy; advertising materials company Haynes International, Inc.; Kokomo Indiana USA; 2008; www.haynesintl.com.
• [4] Górny, Z., Sobczak J.(2005). Modern casting materials based on non-ferrous metals. Kraków: ZA-PIS.
• [5] Stefański, Z., Pirowski, Z.i inni (1995).Technological tests casting of nickel alloys. Praca statutowa Instytutu Odlewnictwa; Zlec. 3671/00; Kraków.
• [6] Sobczak, N., Purgert, R., Asthana, R., Sobczak, J.J., Homa, M., Nowak, R., Pirowski, Z., Siewiorek, A. & Turalska P. (2013). High temperature interaction of polycrystalline Y2O3 with liquid Ni and its. Journal of Materials Engineering and Performance.
• [7] Homa, M., Sobczak, N., Purgert, R., Asthana, R., Sobczak, J.J., Nowak, R., Pirowski, Z., Morgiel, J. & Onderka. B. (2013). Wetting behaviour and reactivity of NiCr10 alloy in contact with MgO(100) single crystal. Ceramics International.
• [8] Homa, M., Sobczak, N., Purgert, R., Asthana, R., Sobczak, J.J, Nowak, R., Pirowski, Z., Siewiorek, A. (2013). Wettability and reactivity between liquid Ni alloys and YAG and YAP substrates. Journal of Materials Engineering and Performance.