Improving the Sink Roll Life in Galvalume using Material AT101 & the various Thermal-Spray Coating on SS3l6L Roll Surface
Saurabh A. Bobde1, S.D. Kshirsagar2
1Saurabh A. Bobde, M.Tech (CAD/CAM), Dept. of Mechanical Engg. YCCE, Nagpur, India
2Prof. S.D. Kshirsagar, Dept. of Mechanical Eengg. YCCE, Nagpur, India.
Manuscript received on February 04, 2013. | Revised Manuscript received on February 27, 2013. | Manuscript published on March 05, 2013. | PP: 282-286 | Volume-3 Issue-1, March 2013. | Retrieval Number: A1375033113/2013©BEIESP
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© The Authors. Published By: Blue Eyes Intelligence Engineering and Sciences Publication (BEIESP). This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/)
Abstract: Galvalume is a Continuous Galvanizing Line. In Galvalume the Zn-Al coating is done on the CR sheets to inprove their corrosion resistance and to improve their life. JSW Ispat Steel Ltd. Kalmeshwar has to frequently replace the sink roll assembly used in Zn-Al tank of the Galvalume.The mean time between replacements is very less as compared to expected mean time between failures (expected MTBF). This is due to deposition of zinc dross on the surface of roller. This result in uneven or improper Zn-Al coating on sheet surface. To avoid this sink roll has to replace. The frequent replacement of roller assembly results in Stoppage of production, material loss, start-up loss and increased cost of production. This paper proposes an alternative material to extend the life of sink roll and the thermal-spray coating of various materials on traditionally used sink roll of SS316L roll surface.
Keywords: CR sheets, Galvalume, MTBF, Sink roll, SS316L, start-up loss, Zinc dross.