The Effect of Cooling Agent on Stress and Deformation of Charge-loaded Cast Pallets

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Abstract

The results of research on the effect of the type of cooling agent used during heat treatment and thermal-chemical treatment on the formation of temperature gradient and stress-deformation distribution in cast pallets, which are part of furnace accessories used in this treatment, are disclosed. During operation, pallets are exposed to the effect of the same conditions as the charge they are carrying. Cyclic thermal loads are the main cause of excessive deformations or cracks, which after some time of the cast pallet operation result in its withdrawal due to damage. One of the major causes of this damage are stresses formed under the effect of temperature gradient in the unevenly cooled pallet construction. Studies focused on the analysis of heat flow in a charge-loaded pallet, cooled by various cooling agents characterized by different heat transfer coefficients and temperature. Based on the obtained temperature distribution, the stress distribution and the resulting deformation were examined. The results enabled drawing relevant conclusions about the effect of cooling conditions on stresses formed in the direction of the largest temperature gradient.

[1] Lai, G.Y. (2007). High-Temperature Corrosion and Materials Applications. ASM International.

[2] Davis, J.R. (Ed.). (1997). Industrial Applications of Heat- Resistant Materials. In Heat Resistant Materials (67-85). ASM International.

[3] Dossett, J.L., Boyer, H.E. (2006). Practical Heat Treating. ASM International, 2nd ed.

[4] Piekarski, B. (2012). Creep-resistant castings used in heat treatment furnaces. Szczecin: West Pomeranian University of Technology Publishing House. (in Polish).

[5] Piekarski, B. & Drotlew, A. (2008). Designing of castings working in conditions of temperature cyclic changes. Archives of Mechanical Technology and Materials. 28(3), 95-102. (in Polish).

[6] Drotlew, A. et al. (2013). Structure of guide grate in heat treatment technological equipment. Transactions of foundry research institute. 53(3), 59-71, DOI: 10.7356/iod.2013.16.

[7] Słowik, J.A, Drotlew, A. & Piekarski, B. (2016). The flexibility of pusher furnace grate. Archive of Foundry Engineering. 16(4), 137-140. DOI: 10.1515/afe-2016-0098.

[8] Lo, K.H. et al. (2009). Recent developments in stainless steels. Materials Science and Engineering R. 65, 39-104.

[9] Gutowski, P. (1989). Research the causes of cracking in pallets operating in furnaces for the carburising treatment. Unpublished doctoral dissertation, Technical University of Szczecin, Szczecin. (in Polish).

[10] Bajwoluk, A. & Gutowski, P. (2015). The effect of pallet component geometry on temperature gradient during cooling. Archive of Foundry Engineering. 15(1), 5-8. DOI: 10.1515/afe-2015-0001.

[11] Bajwoluk, A. & Gutowski, P. (2014). Analysis of thermal stresses in components of pallets operating in furnaces for the carburising treatment. Archive of Foundry Engineering. 14(spec.1), 175-180.

[12] Luty, W. (1986). Quenching cooling agents. Warszawa: Science-Technical Publishers. (in Polish).

[13] Orłoś, Z. (1992). Thermal stresses. Warszawa: Polish Scientific Publishers. (in Polish).

[14] Petela, R. (1983). Heat flow. Warszawa: Polish Scientific Publishers. (in Polish).

[15] Standard EN 10295:2002. Heat resistant steel castings.

Archives of Foundry Engineering

The Journal of Polish Academy of Sciences

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CiteScore 2016: 0.42

SCImago Journal Rank (SJR) 2016: 0.192
Source Normalized Impact per Paper (SNIP) 2016: 0.316

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