Laser cladding of tungsten carbides (Spherotene®) hardfacing alloys for the mining and mineral industry

被引:84
作者
Amado, J. M. [1 ]
Tobar, M. J. [1 ]
Alvarez, J. C. [1 ]
Lamas, J. [1 ]
Yanez, A. [1 ]
机构
[1] Univ A Coruna, Dept Ingn Ind 2, E-15403 Ferrol, Spain
关键词
Laser cladding; Tungsten carbides; COATINGS;
D O I
10.1016/j.apsusc.2008.07.198
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
The abrasive nature of the mechanical processes involved in mining and mineral industry often causes significant wear to the associated equipment and derives non-negligible economic costs. One of the possible strategies to improve the wear resistance of the various components is the deposition of hardfacing layers on the bulk parts. The use of high power lasers for hardfacing (laser cladding) has attracted a great attention in the last decade as an alternative to other more standard methods (arc welding, oxy-fuel gas welding, thermal spraying). In laser cladding the hardfacing material is used in powder form. For high hardness applications Ni-, Co- or Fe-based alloys containing hard phase carbides at different ratios are commonly used. Tungsten carbides ( WC) can provide coating hardness well above 1000 HV (Vickers). In this respect, commercially available WC powders normally contain spherical micro-particles consisting of crushed WC agglomerates. Some years ago, Spherotene (R) powders consisting of spherical-fused monocrystaline WC particles, being extremely hard, between 1800 and 3000 HV, were patented. Very recently, mixtures of Ni- based alloy with Spherotene powders optimized for laser processing were presented (Technolase (R)). These mixtures have been used in our study. Laser cladding tests with these powders were performed on low carbon steel (C25) substrates, and results in terms of microstructure and hardness will be discussed. (C) 2008 Elsevier B. V. All rights reserved.
引用
收藏
页码:5553 / 5556
页数:4
相关论文
共 8 条
[1]   Analysis of coaxial laser cladding processing conditions [J].
de Oliveira, U ;
Ocelík, V ;
De Hosson, JTM .
SURFACE & COATINGS TECHNOLOGY, 2005, 197 (2-3) :127-136
[2]   Materials selection to excavator teeth in mining industry [J].
Fernández, JE ;
Vijande, R ;
Tucho, R ;
Rodríguez, J ;
Martín, A .
WEAR, 2001, 250 :11-18
[3]   Abrasive wear performance and microstructure of laser clad WC/Ni layers [J].
Huang, SW ;
Samandi, M ;
Brandt, A .
WEAR, 2004, 256 (11-12) :1095-1105
[4]  
Olson D.L., 1992, ASM International, ASM Handbook, V18, P649
[5]  
Steen WM., 2003, Laser material processing, V3rd
[6]   Morphology and characterization of laser clad composite NiCrBSi-WC coatings on stainless steel [J].
Tobar, M. J. ;
Alvarez, C. ;
Amado, J. M. ;
Rodriguez, G. ;
Yanez, A. .
SURFACE & COATINGS TECHNOLOGY, 2006, 200 (22-23) :6313-6317
[7]  
Tylczak J.H., 1992, ASM HDB, V18, P184
[8]   Influence of tungsten carbide particle size and distribution on the wear resistance of laser clad WC/Ni coatings [J].
Van Acker, K ;
Vanhoyweghen, D ;
Persoons, R ;
Vangrunderbeek, J .
WEAR, 2005, 258 (1-4) :194-202