Abrasion Behavior of WC Reinforced Cast Iron Surface Composite Fabricated by Cast-Infiltration Method

Abstract:

In this paper, WC particles and NH4HCO3 powders were mixed evenly, and then pressed under 150MPa. The WC porous preforms were obtained after the compacts being heat treated to eliminate NH4HCO3. The volume ratios of WC in the preforms were 30%, 40% and 50% respectively. WC/Fe composites were fabricated by infiltrating liquid cast iron into the WC porous preforms. Optic microscope and scanning electron microscope were employed to observe the microstructure of the matrix alloy and the composites. The results showed that matrix alloy without WC addition had pores in the surface. The microstructure of the composites with WC volume fractions of 30%, and 40% were denser than that of 50%. Hardness and wet sliding wear behaviors of the composites were investigated at room temperature. The addition of WC particles could effectively improve the hardness and the wear resistance of the composites. The influence of volume fractions on hardness of the composites was similar to that on wear resistance. The hardness and the wear resistance of the 40vol.%WC/Fe composite was better than those of the 30vol.%WC/Fe composite. And the properties of the 50vol.%WC/Fe composite were the worst.

• Periodical: Advanced Materials Research (Volumes 476-478)
• Pages: 555-559
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.476-478.555
• Online since: February 2012
• Authors: Guo Jian Cao, Er Jun Guo, Yi Cheng Feng, Li Ping Wang
• Keywords: Iron Matrix Composite, WC, Wear and Abrasion

References

[1] Y. P. Song, H. Yu, X. M. Mao, Wear behavior of WCP/Fe–C composites under high-speed dry Sliding, J. Mater Sci. 43 (2008) 2686–2692.

DOI: 10.1007/s10853-007-2415-y

[2] K. Das, T. K. Bandyopadhyay, S. Das, A Review on the various synthesis routes of TiC reinforced ferrous based composites, Journal of Materials Science. 37 (2002) 3881-3892.

[3] K. Lee, D. H. Nam and S. Lee, Correlation of Microstructure with Hardness and Wear Resistance in (CrB,MoB)/Steel Surface Composites Fabricated by High-Energy Electron Beam Irradiation, Metallurgical and Materials Transactions A. 37A (2006) 663-673.

DOI: 10.1007/s11661-006-0038-6

[4] Z. G. Chen, X. Y. Tang, J. Su, et al., Influences of volume content of WC on wear resistance of sprayed coating, Journal of Jiangsu University (Natural Science Edition). 27 (2006) 44-46.

[5] G. D. Gaudio, Aspects concerning of coating in the production of iron casting by "poly-cast" process, Metallurgical Science and Technology. 9 (2003) 78-91.

[6] Y. S. Wang, W. Huang, Study on Special Poly-phase Composite Layer on Surface of Steel Castings, Hot Working Technology. 2 (1998) 13-15.

[7] B. S. Terry, D. C. Azubike, A. Chryanthou, Carbothermic reduction as a potential means for the direct production of Fe-WC and Fe-TaC, NbC metal-matrix composites, Journal of Materials Science. 29 (1994) 4300-4305.

DOI: 10.1007/bf00414214

[8] E. Pagounis and V.K. Lindroos, Development and Performance of New Hard and Wear-Resistant Engineering Materials, Journal of Materials Engineering and Performance. 6 (1997) 749-756.

DOI: 10.1007/s11665-997-0077-1

[9] C. G. Bao, E. Z. Wang, Y. M. Gao, et al., Effect of Volume Fraction of Particles on Elevated Temperature Wear Resistance of Al2O3/Steel Composites, Acta Mterial Composite Sinica. 18 (2001) 61-64.