High Temperature Behavior of Oxidized Mild Steel in Dry and Wet Atmospheres
0
조회
0
다운로드
0
인용
0
참고문헌
초록
During the hot rolling process, steels develop an oxide scale on their surface. This scale can affect the mechanical properties of the rolled steel and its surface aspect. The main problem comes from the mechanical integrity of the oxide scales which could delaminate or crack, leading eventually to later oxide incrustation within the steel. The objective of the present work is to qualify the mechanical integrity of the iron oxide scales during the hot rolling process. The laboratory experiments use a four point bending test to simulate the mechanical solicitation which takes place during the rolling sequence of the steel slabs. The oxide scales grow on a mild steel at 900°C under wet or dry atmosphere and the oxidized steel is then mecahnically tested at 900°C or 700°C. The high temperature four point bending tests are completed with microstructural observations and with the record of acoustic emission to follow in-situ the mechanical damages of the oxide scales. The results show the role of water vapor which promotes the scale adherence, and the role of the temperature as the oxide are more damaged at 700°C than at 900°C.
Abstract
During the hot rolling process, steels develop an oxide scale on their surface. This scale can affect the mechanical properties of the rolled steel and its surface aspect. The main problem comes from the mechanical integrity of the oxide scales which could delaminate or crack, leading eventually to later oxide incrustation within the steel. The objective of the present work is to qualify the mechanical integrity of the iron oxide scales during the hot rolling process. The laboratory experiments use a four point bending test to simulate the mechanical solicitation which takes place during the rolling sequence of the steel slabs. The oxide scales grow on a mild steel at 900°C under wet or dry atmosphere and the oxidized steel is then mecahnically tested at 900°C or 700°C. The high temperature four point bending tests are completed with microstructural observations and with the record of acoustic emission to follow in-situ the mechanical damages of the oxide scales. The results show the role of water vapor which promotes the scale adherence, and the role of the temperature as the oxide are more damaged at 700°C than at 900°C.
참고문헌 (19)
- M. Krzyzanowski, "Metal Forming Science and Practice", pp.259~, J. G. Lenard
- B. Picque, "Experimental study and numerical simulation of iron oxide scales mechanical behavior in hot rolling", 박사
- S. Frydman, , Materials Science and Engineering, 40(2), pp.191~ (1979)
- M. Boinet, , Surface and Coatings Technology, 199, pp.141~ (2005)
- J. Favergeon, , the Eurocorr Conference (2005)
- A. P. Grosvenor, , Surface Science, 574, pp.317~ (2005)
- S. J. Roosendaal, , Surface Science, 494, pp.197~ (2001)
- P. Hancock, , Materials Science and Technology, 4, pp.398~ (1988)
- M. Torresa, , Journal of Materials Processing and Technology, 105, pp.258~ (2000)
- D. P. Burke, , Scripta Materialia, 42, pp.277~ (2000)
- N. Birks, "Introduction to High Temperature Oxidation of Metals" (1983), Edward Arnold
- W. H. Sun, , Journal of Materials Processing and Technology, 155, pp.1300~ (2004)
- W. H. Sun, , Journal of Materials Processing and Technology, 155, pp.1300~ (2004)
- Y. Hidaka, , Materials Science Forum (2001)
- B. Picque, , Wear, 260, pp.231~ (2006)
- M. Krzyzanowski, , Metallurgical and Materials Transactions B (2000)
- G. Moulin, , Ceramics, 92, pp.89~ (2005)
- T. Asai, , ISIJ International, 37(3), pp.272~ (1997)
- P. Berger, , Nuclear Inst and Methods in Physics Research B, 130, pp.717~ (1997)