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The Effects of Heat-treatment on the Mechanical Properties of High Chromium Cast Irons  

Kim, Sug-Won (Div. of New Material, RCAMD, Chonbuk National University)
Kim, Ki-Kon (Div. of New Material, RCAMD, Chonbuk National University)
Park, Jin-Sung (Div. of New Material, RCAMD, Chonbuk National University)
Kim, Dong-Keun (Div. of New Material, RCAMD, Chonbuk National University)
Yoon, Young-Gap (Div. of New Material, RCAMD, Chonbuk National University)
Publication Information
Journal of Korea Foundry Society / v.25, no.1, 2005 , pp. 23-29 More about this Journal
Abstract
Mechanical characteristics of Hi-Cr cast irons containing 16.8%Cr and 3.0%C were studied with various heat treatments. After as-cast Y-block ingots were annealed fully, the ingots were machined into cylinderical specimens with the size of 9mm in diameter and 20mm in length in order to investigate the effect of heat-treatments on mechanical characteristics of high Cr cast irons. All specimens were heat-treated by quenching- tempering, austempering and cyclic heat at the various temperatures(950, 1000, 1050 and $1100^{\circ}C$) respectively. The wear amount was measured for each heat-treated specimens against the counterpart of a hardened SKD11 steel at the following conditions; wearing velocity: 0.7 m/s, load: 100N and sliding distance: 70 km. After as-cast specimens were annealed, fine $M_{3}C$ carbides were formed, which affected the hardness and the wear resistance of Hi-Cr specimens. High hardness and good wear resistance were appeared on the specimens treated at 950 and $1000^{\circ}C$ and the austempered specimens show excellent wear resistance as well as high hardness.
Keywords
High Cr cast iron; $M_{7}C_{3}$ carbides; $M_{3}C$ carbides; Austempering treatment; Q-T treatment;
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1 G S. Cho and C. S. Kim; 'Phase Transformations and subsequent solute Redistribution Behaviors of Fe-15Cr - 5V-1.2C Alloy', J. of the Korean Inst. of Met. & Mater., 35(2), (1997)
2 S. W. Kim, D. K. Kim, E. K. Lee, and H. Y. Jang; 'The Study on the Effect of Alloying Elements (V, Ti) and Heat Treatment on the Mechanical Properties in Chromium Cast Iron' J. of Korean Foundrymen' s Society, 12(6) (1992.12)
3 A. Savamoto, K. Ogi and K. Matsuda; Imono, 55 (1983) No.7
4 S. W. Kim and E. K. Lee; 'The study on the Characteristics of Solidification and Heat Treatment in Hypo Eutectic Chromium Cast Iron', J. of the Korean Inst. of Met. & Mater., 29(9) (1991) 933
5 S. W. Shin and S. K. Yu; Korean J. of Materials Research, 10(6) (2000)
6 Y. Masubara, K. Ogi, and K. Matsuda; AFS Transactions, 81-71 183-196
7 S. W. Kim, O. Y. Lee and D. K. Kim; 'Study on the effect of silicon content on matrix of hypo-eutectic Cr alloyed Cast Iron', J. of Korean Foundrymen' s Society, 4(2)