Improving the Surface Properties of Gray Cast Iron through In-Situ Alloying

Authors

1 1. Department of Materials Engineering, Isfahan University of Technology, Isfahan, Iran.

2 2. Department of Mechanical Engineering, Isfahan University of Technology, Isfahan, Iran.

Abstract

Conventionally, alloying elements are being added to the whole melt; however, in this research in-situ surface alloying of gray cast iron was employed to improve surface properties of the castings. Wires of pure copper with diameters of 0.4 and 0.8 mm were inserted and fixed at bottom of sand molds before melting. Chemical composition analysis revealed the presence of copper from surface to a depth of 1 cm. Microstructural investigations indicated that graphite type changed from A to D and E. Moreover, the content of graphite phase decreased while that of pearlite increased at the surface. Hardness was higher at surface of copper added samples. Wear resistant of the in-situ surface alloyed samples was better than the no-copper added ones.
 

Keywords

References

1. Angus, H. T., Cast Iron: Physical and Engineering Properties, p. 554, Elsevier, 2013.
2. Walton, C. F., Iron Casting Handbook,, Iron Casting Society Inc, p. 607, NewYork, 1981.
3. ASM Handbook, Vol.1: Properties and Selection: Irons, Steels, and High Performance Alloys, ASM international, pp. 140-194, 1990.
4. Silman, G., Kamynin, V., and Tarasov, A., “Effect of Copper on Structure Formation in Cast Iron”, Metal Science and Heat Treatment, Vol. 45, No. 7-8, pp. 254-258, 2003.
5. Xu, W., Ferry, M., and Wang, Y.,“Influence of Alloying Elements on As-Cast Microstructure and Strength of Gray Iron”, Materials Science and Engineering, Vol. 390, No. 1, pp. 326-333, 2005.
6. Amirsadeghi, A., and Sohi, M. H., “Comparison of the Influence of Molybdenum and Chromium TIG Surface Alloying on the Microstructur, Hardness and Wear Resistance of ADI”, Journal of Materials Processing Technology, Vol. 201, pp. 673-677, 2008.
7. Heu, Z., and Xu, Z., “Plasma Surface Alloying of Spheroidal Graphite Iron”, Surface and Coatings Technology, Vol. 131, pp. 574-578, 2000.
8. Zhong, M., and Zhang, H., “Corrosion and Wear Resistance Characteristics of NiCr Coating by Laser Alloying with Powder Feeding on Gray Iron Liner”, Wear, Vol. 260, pp. 1349-1355, 2006.
9. Qian, M., Kuroshima, Y., and Nagayoshi, H., “Surface Hardening of Ductile Cast Iron using Stainless Steel”, Materials Science and Engineering, Vol. 197, pp. 88-92, 1996.
10. ASM Handbook, Vol. 10: Materials Characterization, p. 761, ASM International, 1986.
11. Kurz, W., and Fisher, D. J., Fundamentals of Solidification, p. 305, Trans Tech, Zuerich, 1998.
12. ASM Handbook, Vol. 15: Casting, p. 1256, ASM International, Ohio, 1992.
13. Melnikov, V. P., “Effect of Chemical Composition on the Strength of Large Castings from Gray Iron”, Metal Science and Heat Treatment, Vol. 49, pp. 394-398, 2007.
14. ASM Handbook, Vol. 1: Properties and Selection: Irons, Steels, and High-Performance Alloys, p. 1063, ASM International, Ohio, 1990.
16. Moonesan, M., and Madah, F., “Effect of Alloying Elements on Thermal Shock Resistance of Gray Cast Iron”, Journal of Alloys and Compounds, Vol. 520, pp. 226-231, 2012.
17. ASM Handbook, Vol. 3: Alloy phase diagram, ASM International, p. 800, Ohio, 1992.
Journal of Advanced Materials in Engineering (Esteghlal)
Volume 36, Issue 3
November 2017
Pages 1-10

Files

Share

How to cite

Statistics

تحت نظارت وف ایرانی