Influence of Ta on microstructure and abrasive wear resistance of laser clad NiCrSiB coating

Abstract

A mixture of NiCrSiB alloy powder and tantalum (Ta) powder was used as laser clad material to improve abrasive wear resistance of the Ni-based coating. The microstructure and wear resistance of the coating were investigated. Addition of Ta element works to suppress the growth of coarse M₇C₃ carbide in the coating, resulting in a decrease in aspect ratio of coarse carbide. In the abrasive wear test, in situ synthesized TaC particles well bond with Ni-based matrix, and are hardly pull out from wear surface. Grooves on the worn surface of NiCrSiB coating are much deeper and sharper than those in the NiCrSiB+Ta composite coating. Also, a weight loss of the composite coating is much lower than that of the NiCrSiB coating. The wear resistance of the laser clad Ni-based coating is enhanced to a much greater extent through the addition of Ta. This is attributed to the in situ synthesized hard TaC particles of nearly equiaxed shape, the Ni-based matrix strengthened by Ta and the decrease in aspect ratio of the coarse brittle carbides.

Keywords

laser cladding / Ni-based alloy / wear resistance / tantalum / TaC / particle reinforcement

References

[1] Vilar R Laser Cladding[J]. J. Laser Appl., 1999, 11(2): 64-79.

[2] Singh A, Dahotre N B Phase Evolution During Laser In-Situ Carbide Coating[J]. Metall. Mater. Trans. A, 2005, 36A(3A): 797-803.

[3] Corchia M, Delogu P, Nenci F, . Microstructural Aspects of Wear-Resistant Stellite and Colmonoy Coatings by Laser Processing[J]. Wear, 1987, 119(2): 137-152.

[4] Liu S L, Zheng X P, Geng G Q Dry Sliding Wear Behavior and Corrosion Resistance of NiCrBSi Coating Deposited by Activated Combustion-High Velocity Air Fuel Spray Process[J]. Mater. Des., 2010, 31(2): 913-917.

[5] Wang D S, Liang E J, Chao M J, . Investigation on the Microstructure and Cracking Susceptibility of Laser-Clad V₂O₅/Nicrbsic Alloy Coatings[J]. Surf. Coat. Technol., 2008, 202(8): 1 371-1 378.

[6] Wu X J, Xing J D, Fu H G, . Effect of Titanium on the Morphology of Primary M₇C₃ Carbides in Hypereutectic High Chromium White Iron[J]. Mater. Sci. Eng. A, 2007, 457(1–2): 180-185.

[7] Van Acker K, Vanhoyweghen D, Persoons R, . Influence of Tungsten Carbide Particle Size and Distribution on the Wear Resistance of Laser Clad WC/Ni Coatings[J]. Wear, 2005, 258(1–4): 194-202.

[8] Pagounis E, Talvitie M, Lindroos V K Influence of Reinforcement Volume Fraction and Size on the Microstructure and Abrasion Wear Resistance of Hot Isostatic Pressed White Iron Matrix Composites[J]. Metall. Mater. Trans. A, 1996, 27A(12): 4 171-4 181.

[9] Berns H, Wewers B Development of an Abrasion Resistant Steel Composite With In Situ TiC Particles[J]. Wear, 2001, 251: 1 386-1 395.

[10] de Damborenea J, Navas C, Colaco R, . Abrasive Wear Behaviour of Laser Clad and Flame Sprayed-Melted NiCrBSi Coatings[J]. Surf. Coat. Technol., 2006, 200(24): 6 854-6 862.

[11] Yu T, Deng Q L, Dong G, . Effects of Ta on Microstructure and Microhardness of Ni Based Laser Clad Coating[J]. Appl. Surf. Sci., 2011, 257(11): 5 098-5 103.

[12] Sun R L, Lu W X, Yang X J Microscopic Morphology and Distribution of TiC Phase in Laser Clad TiC-NiCrBSi Cermet Layer[J]. J. Chin. Ceram. Soc., 2005, 33(12): 1 448-1 452.

[13] Li Q, Song G M, Zhang Y Z, . Microstructure and Dry Sliding Wear Behavior of Laser Clad Ni-Based Alloy Coating With the Addition of SiC[J]. Wear, 2003, 254(3–4): 222-229.

[14] Chao M J, Wang W L, Liang E J, . Microstructure and Wear Resistance of TaC Reinforced Ni-Based Coating by Laser Cladding[J]. Surf. Coat. Technol., 2008, 202(10): 1 918-1 922.

[15] Xu G J, Kutsuna M, Liu Z J, . Characteristics of Ni-Based Coating Layer Formed by Laser and Plasma Cladding Processes[J]. Mater. Sci. Eng. A, 2006, 417(1–2): 63-72.

[16] Li Q, Zhang D W, Lei T Q, . Comparison of Laser-Clad and Furnace-Melted Ni-Based Alloy Microstructures[J]. Surf. Coat. Technol., 2001, 137(2–3): 122-135.

[17] Lee H C, Gurland J Hardness and Deformation of Cemented Tungsten Carbide[J]. Mater. Sci. Eng. A, 1978, 33(1): 125-133.

[18] Argon A S, Im J Separation of Second Phase Particles in Spheroidized 1045 Steel, Cu-0.6pct Cr Alloy, and Maraging-Steel in Plastic Straining[J]. Mater. Trans. A, 1975, A6(4): 839-851.

[19] Sun R L, Yang D Z, Guo L X, . Microstructure and Wear Resistance of NiCrBSi Laser Clad Layer on Titanium Alloy Substrate[J]. Surf. Coat. Technol., 2000, 132(2–3): 251-255.

[20] Pagounis E, Talvitie M, Lindroos V K Influence of Matrix Structure on the Abrasion Wear Resistance and Toughness of a Hot Isostatic Pressed White Iron Matrix Composite[J]. Metall. Mater. Trans. A, 1996, 27(12): 4 183-4 191.