CMnAl TRIP Steel Surface Modification During CGL Processing
1
조회
0
다운로드
0
인용
0
참고문헌
키워드
초록
The mechanisms of selective oxidation of intercritically annealed CMnAl TRIP steels in a Continuous Galvanizing Line (GCL) were studied by cross-sectional observation of the surface and sub-surface regions by means of High Resolution Transmission Electron Microscopy (HR-TEM). The selective oxidation and nitriding of an intercritically annealed CMnAl TRIP steel in a controlled dew point 10%H2+N2 atmosphere resulted in the formation of c-xMnO.MnO2 (1≤x<3) and c-xMnO.Al2O3 (x≥1) particles on the steel surface. Single crystal c-xMnO.SiO2 (2≤x≤4) oxide particles were also observed on the surface. A thin film of crystalline c-xMnO.SiO2 (2≤x<3) and c-xMnO.Al2O3 (x≥1) was present between these particles. In the sub-surface region, internal oxidation, nitriding and intermetallic compound formation were observed. In the first region, large crystalline c-xMnO.SiO2 (1≤x≤2) and c-xMnO.Al2O3 (x≥1) oxides particles were present. In the second region, c-AlN particles were observed, and in a third region, small MnAlx (x>1)intermetallic compound particles were observed.
Abstract
The mechanisms of selective oxidation of intercritically annealed CMnAl TRIP steels in a Continuous Galvanizing Line (GCL) were studied by cross-sectional observation of the surface and sub-surface regions by means of High Resolution Transmission Electron Microscopy (HR-TEM). The selective oxidation and nitriding of an intercritically annealed CMnAl TRIP steel in a controlled dew point 10%H2+N2 atmosphere resulted in the formation of c-xMnO.MnO2 (1≤x<3) and c-xMnO.Al2O3 (x≥1) particles on the steel surface. Single crystal c-xMnO.SiO2 (2≤x≤4) oxide particles were also observed on the surface. A thin film of crystalline c-xMnO.SiO2 (2≤x<3) and c-xMnO.Al2O3 (x≥1) was present between these particles. In the sub-surface region, internal oxidation, nitriding and intermetallic compound formation were observed. In the first region, large crystalline c-xMnO.SiO2 (1≤x≤2) and c-xMnO.Al2O3 (x≥1) oxides particles were present. In the second region, c-AlN particles were observed, and in a third region, small MnAlx (x>1)intermetallic compound particles were observed.
참고문헌 (13)
- B. C. De Cooman, , Curr. Opin. Solid State Mater. Sci., 8, pp.285~ (2004)
- J. Mahieu, , Metall. and Mater. Trans. A, 32, pp.2905~ (2001)
- J. Mahieu, , Proceedings of the 6th International Conference on Zinc and Zinc Alloy Coated Steel Sheet (Galvatech), pp.529~ (2004), Association for Iron and Steel Technology
- C. Ramadeva Shastry, , Proceedings of the 7th International Conference on Zinc and Zinc Alloy Coated Steel Sheet (Galvatech), pp.403~ (2007), Association for Iron and Steel Technology
- B.R. Strohmeier, , J. Phys. Chem., 88, pp.4922~ (1984)
- E.M. Bellhouse, , Mater. Sci. Eng. A, 463, pp.147~ (2007)
- X. Vanden Eynde, , Surf. and Inter. Ana., 35, pp.1004~ (2003)
- Y.F. Gong, , J. Microscopy, 230, pp.424~ (2008)
- Y.F. Gong, , ISIJ Int., 48, pp.1745~ (2008)
- Y.F. Gong, , ISIJ Int., 49, pp.557~ (2009)
- D. Huin, , Oxidation of Metals, 64, pp.132~ (2005)
- C. Wagner, , Z. Elektrochemie, 63, pp.772~ (1959)
- J. Mahieu, , 박사, pp.2006