CaO 첨가와 열간압연이 마그네슘 합금의 고온산화에 미치는 영향
Effect of CaO and Hot Rolling on the High Temperature Oxidation of Magnesium Alloys
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Magnesium alloys of AZ31, AZ31 + (0.5, 1, 1.5)wt.% CaO were cast, hot rolled, and oxidized between 450 and 650oC in atmospheric air. The added CaO enabled to cast the AZ31 alloy in air. It decomposed and precipitated along the grain boundaries of the AZ31 alloy as Al2Ca. The more the amount of CaO was,the more Al2Ca formed. The oxidation limit was about 450oC for the AZ31 alloy. But, It increased to 650oC in the CaO-added alloys. Hot rolling destroyed the precipitates that formed along the grain boundaries of the AZ31 alloy. During oxidation, MgO oxide scales that incorporated CaO formed at the outer surface of the formed oxide layer.
Abstract
Magnesium alloys of AZ31, AZ31 + (0.5, 1, 1.5)wt.% CaO were cast, hot rolled, and oxidized between 450 and 650oC in atmospheric air. The added CaO enabled to cast the AZ31 alloy in air. It decomposed and precipitated along the grain boundaries of the AZ31 alloy as Al2Ca. The more the amount of CaO was,the more Al2Ca formed. The oxidation limit was about 450oC for the AZ31 alloy. But, It increased to 650oC in the CaO-added alloys. Hot rolling destroyed the precipitates that formed along the grain boundaries of the AZ31 alloy. During oxidation, MgO oxide scales that incorporated CaO formed at the outer surface of the formed oxide layer.
참고문헌 (22)
- K. U. Kainer, "Magnesium-Alloys and Technology", pp.1~ (2003), Wiley-VCH
- W. Ha, , Mater. Sci. Forum, 475, pp.2543~ (2005)
- F. C. Erickson, , Foundry Management & Technology, 126, pp.38~ (1998)
- J. R. Liu, , Corros. Sci., 51, pp.129~ (2009)
- M. Sakamoto, , J. Mater. Sci. Lett., 16, pp.1048~ (1997)
- 김희경, "Ca첨가 반응고 AZ31 마그네슘 합금의 재가열에 따른 미세조직 변화", 한국주조공학회지, 32(2), pp.75~80 (2012), 한국주조공학회[DOI]
- 최병호, "Ca 첨가한 AZ91 마그네슘 합금 용탕의 산화거동", 대한금속·재료학회지, 42(8), pp.673~678 (2004), 대한금속·재료학회
- B. S. You, , J. Kor. Inst. Met. & Mater., 39, pp.446~ (2001)
- S. L. Cheng, , Trans. Nonferr. Met. Soc. China, 19, pp.299~ (2009)
- T. S. Shih, , Mater. Chem. Phys., 85, pp.302~ (2004)
- S. K. Kim, "Magnesium Alloy and Manufacturing Method Thereof", Kor. Patent 10-1147671, ~ (2011)
- S. H. Ha, , Rare Metals, 25, pp.150~ (2006)
- S. K. Kim, , J. Mater. Process. Tech., 187, pp.757~ (2007)
- D. I. Jang, , Trans. Nonferr. Met. Soc. China, 19, pp.s76~ (2009)
- J. K. Lee, , Trans. Nonferr. Met. Soc. China, 21, pp.s23~ (2011)
- M. Yang, , Mater. Sci. Eng. A, 491, pp.440~ (2008)
- C. Xu, , J. Rare Earth., 26, pp.604~ (2008)
- J. H. Kim, , Mater. Sci. Eng. A, 525, pp.18~ (2009)
- F. Czerwinski, , Acta Mater., 50, pp.2639~ (2002)
- R. Ninomiya, , Acta Metall. Mater., 43, pp.669~ (1995)
- B. S. You, , Scripta Mater., 42, pp.1089~ (2000)
- Y. Yin, , J. Phase Equilib., 14, pp.588~ (1993)