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The Effect of Austempering Treatment on Microstructure and Mechanical Properties of NICI and DCI for Rolls Used in Hot Rolling Mill  

Kim, Jae-Jin (AVL Korea)
Oh, Seok-Jung (Hyundai Steel Co.)
Yoo, Kook-Jong (Dongbu Steel Co.)
Andy, Tirta (School of Materials Science & Engineering, Yeungnam University)
Baek, Eung-Ryul (School of Materials Science & Engineering, Yeungnam University)
Publication Information
Journal of Korea Foundry Society / v.29, no.6, 2009 , pp. 251-256 More about this Journal
Abstract
The effect of austempering treatment on mechanical properties of nodular indefinite chilled iron(NICI) and ductile cast iron(DCI) was investigated. In microstructural observation, matrix phase(pearlite and ferrite) was changed to ausferrite after austempering treatment both DCI and NICI. In case of NICI, decomposition of cementite($Fe_3C$) during austempering treatment was induced. After austempering treatment, mechanical properties such as hardness, tensile strength and impact toughness was improved in NICI and DCI. The wear resistance is slightly decreased because of decomposition of cementite during austempering treatment in NICI but impact toughness and strength is dramatically increased.
Keywords
Nodular indefinite chilled iron (NICI); Ductile cast iron (DCI); Austempered ductile iron (ADI); Austempering treatment;
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1 S. E. Lundberg and T. Gustafsson: J. Mat. Process. Technol., "The Influence of Rolling Temperature on Roll Wear, "Investigated in a New High Temperature Test Rig". 42, (1994) 239-291   DOI   ScienceOn
2 S. E. Lundberg: Steel Research, "Evaluation of deterioration mechanisms and roll life different roll materials", 64, (1993) 597-603   DOI
3 M. Shimizu, O. Shitamura, S. Matsuo, T. Kamata, and Y. Kondo: ISIJ Int., "Development of High Performance New Composite Roll", 32, issue: 11, (1992) 1244-1249   DOI
4 ASM Specialty Handbook, Cast Irons(eds., J. R. Davis), ASM international, Material Park (1996) 192
5 A. S. Hamid Ali and R. Elliott: Materials Science and Technology, "Influence of Austenitizing Temperature on Austempering of an Mn-Mo-Cu Alloyed Ductile Iron. I. Austempering Kinetics and the Processing Window", 12, 12 (1996) 1021-1031   DOI   ScienceOn
6 H. Bayati and Elliot: Materials Science and Technology, "Austempering Process in High Manganese Alloyed Ductile Cast Iron", 11, 2, (1995) 118-129   DOI   ScienceOn
7 N. K. Datta and N. N. Engel: AFS Transaction, 74, (1985) 267
8 N. Darwish and R. Elliot: Materials Science and Technology, "Austempering of low manganese ductile irons, Part 1: Processing window" 9, (1993) 572-585   DOI   ScienceOn
9 A. D. Sarkar: Int. Series in Materials Science and Technology, 18, Pergamon Press, (1976) 71
10 S. Spuzic, K.N. Strafford, C. Subramanian and G. Savage: Wear, "Wear of hot rolling mill rolls: an overview, Wear". 176, (1994) 261-271   DOI   ScienceOn
11 N. Darwish and R. Elliot: Materials Science and Technology, Austempering of low manganese ductile irons, Part II: Influence of austenitising temperature" 9, (1993) 586-602   DOI   ScienceOn
12 D. Suh, S. Lee, Y. Koo and H. C. Lee, Metallurgical and Materials Transactions A, 27A, (1996) 3149
13 A. S. Hamid Ali and R. Elliott: Materials Science and Technology, "Influence of Austenitising Temperature on Austempering of an Mn-Mo-Cu Alloyed Ductile Iron. II. Mechanical Properties" 13, (1997) 24-30   DOI   ScienceOn
14 N. Darwish and R. Elliot: Materials Science and Technology, "Austempering of low manganese ductile irons Part 3 Variation of mechanical properties with heat treatment conditions" 9, (1993) 882-889   DOI   ScienceOn
15 J. Mallia, M. Grech, and R. E. Smallman: Materials Science and Technology, "Effect of Silicon Content on Transformation Kinetics of Austempered Ductile Iron" 14, 5, (1998) 452-460   DOI   ScienceOn
16 A. S. Hamid Ali, K. I. Uzlov, N. Darwish and R. Elliot: Materials Science and Technology, "Austempering of Low Manganese Ductile Irons Part 4: Relationship Between Mechanical Properties and Microstructure" 10, (1994) 35-40   DOI   ScienceOn