The Effect of Microstructure on Properties of Fe-Cr-C-Nb/Ti Hardfacing Alloy

Abstract:

Hardfacing is one of the most useful and economical ways to improve the performance of components submitted to severe wear conditions. In this paper, a new kind of alloy called Fe-Cr-C-Nb/Ti alloy system for wear resistant successfully with the shielded metal arc welding (SMAW) method has been studied. The microstructure and wear resistant of hardfacing alloys reinforced with primary carbides were compared in this study. Meanwhile, the average hardness, the abrasion weight loss and microstructure of deposited metal were systematically studied by optical microscopy, scanning electronic microscopy and energy dispersive spectrum analysis. The results showed that the microstructure of the best optimizing hardfacing layer was the mixed martensite and little retained austenite, and NbC/TiC particles distributing dispersively in the matrix. The amount of low-carbon martensite and high-carbon martensite was identical. The alloy system showed high wear resistance due to the formation of dispersed MC type carbides and good toughness due to the exist of low carbon martensite in the matrix. The hardfacing alloy reinforced with complex carbides was also investigated, the microstructure was analyzed and its hardness and wear resistance were evaluated. In conclusion, the distribution, the chemical composition and the amount of the carbides, as well as the matrix microstructure are all factors to influence the crack resistance, hardness and wear resistance of the hardfacing alloys.

• Periodical: Advanced Materials Research (Volume 279)
• Pages: 126-131
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.279.126
• Online since: July 2011
• Authors: Wen Bo Tang, Yun Gang Guo, Hon Grui Wang
• Keywords: Carbide, Crack Resistance, Hardfacing, Microstructure, Wear Resistance

References

[1] P. Crook: Friction and wear of hardfacing alloys. ASM Handbook Vol. 18: Friction, Lubrication, and Wear Technology (1992), pp.758-765.

DOI: 10.31399/asm.hb.v18.a0006391

[2] Kim chang Kyu, Euh Kwangiun, Lee Sunghak, Jung jae-Young, Ahn Sangho: Correlation of Microstructure with the Wear Resistance and Fracture Toughness of Hardfacing Alloys Reinforced with Complex Carbides. Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science, 131, 12(2000), pp.3041-3052.

DOI: 10.1007/s11661-000-0083-5

[3] K.G. Budinski: Surface Engineering for Wear Resistance. Prentice-Hall, Englewood Cliffs, NJ, (1988), pp.242-287.

[4] M. H. Staia, A. Fragiel, M. Cruz, et al: Characterization and wear behavior of pulsed electrode surfacing coatings. Wear, 251, 10(2001), pp.1051-1060.

DOI: 10.1016/s0043-1648(01)00775-x

[5] B. Djerdjare, S. Lebaili, S. Lay: Microstructural study of (Co–Ni–Fe) based alloys. Materials Science and Engineering: A Vol. 475 (2008), pp.336-342.

DOI: 10.1016/j.msea.2007.05.092

[6] M.X. Yaoa, J.B.C. Wub, Y. Xiec: Wear, corrosion and cracking resistance of some W- or Mo-containing Stellite hardfacing alloys. Materials Science and Engineering: A Vol. 407 (2005), pp.234-244.

DOI: 10.1016/j.msea.2005.06.062

[7] Dwivedi, D.K.: Abrasive Wear behavious of iron based hard surfacing alloy coatings developed by Welding. Surface Engineering, 20, 4(2004), pp.87-92.

DOI: 10.1179/026708404225014960

[8] Yang Shang-lei, Lv Xue-qin, Zou Zeng-da, Lou Song-nian: Investigation of surfacing electrode with high hardness based on lath martensite. Materials Science and Engineering: A, Vol. 438–440 (2006), pp.281-284.

DOI: 10.1016/j.msea.2006.03.106

[9] M.F. Buchely, J.C. Gutierrez, L.M. Le on, A. Toro: The effect of microstructure on abrasive wear of hardfacing alloys. Wear Vol. 259 (2005), pp.52-61.

DOI: 10.1016/j.wear.2005.03.002

[10] V.E. Buchanan, P.H. Shipway, D.G. McCartney: Microstructure and abrasive wear behaviour of shielded metal arc welding hardfacings used in the sugarcane industry. Wear Vol. 263 (2007), pp.99-110.

DOI: 10.1016/j.wear.2006.12.053

[11] H. Fujimura, A. Notomi, Y. Kamito, M. Kinoshita: Development of hard overlay welding for high wear resistance, IIW Document No.XII-1071-88.

[12] X.H. Wang, Z.D. Zou, S.Y.Qu, S.L. Song: Microstructure and properties of the TiC/Fe-based alloy hardfacing layers. JOURNAL OF MATERIALS SCIENCE Vol. 40 (2005), pp.3629-3633.

DOI: 10.1007/s10853-005-0740-6

[13] A.K. Jha, B.K. Prasad, O.P. Modi, S. Das and A.H. Yegneswaran: Correlating microstructural features and mechanical properties with abrasion resistance of a high strength low alloy steel. Wear Vol. 254 (2003), pp.120-128.

DOI: 10.1016/s0043-1648(02)00309-5

[14] Yang Shang-lei, Lv Xue-qin, Zou Zeng-da, Lou Song-nian: Investigation of surfacing electrode with high hardness based on lath martensite. Materials Science and Engineering: A Vol. 438–440 (2006), pp.281-284.

DOI: 10.1016/j.msea.2006.03.106