Microstructure of Fiber Laser Deposited WC-Co Cemented Carbide and Carbon Steel

Xu, Pei Quan; Li, Lei Jun

doi:10.4028/www.scientific.net/msf.879.2138

Cited by 3 publications

(2 citation statements)

References 4 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Combining the advantages of laser welding and brazing [13,39], laser welding-brazing can accurately control the weld position without heating the whole cemented carbide and reduce the damage to the cemented carbide.…”

Section: Introductionmentioning

confidence: 99%

Effect of Brazing Filler Metals and Welding Parameters on Laser Welding-Brazing Joints of WC-Co to S1045

et al. 2022

Metals

View full text Add to dashboard Cite

Laser welding-brazing was used to join cemented carbide WC-Co and steel dissimilar materials. In this study, high-speed welding was adopted. The effect of welding parameters and brazing filler metals on the macrostructure, elemental diffusion, micro hardness and thermomechanical behavior was analyzed using optical metallography, scanning electron microscopy, electron probe micro-analysis, hardness test, and finite element method (FEM) based on thermo-elastic-plastic analysis. The experimental results show that increasing laser power is helpful to the increase of maximum welding speed. However, FEM also shows that increased welding speed leads to residual stress concentration, especial in the vicinity of jig. It is still a challenge to optimize laser power welding speed for a given brazing filler metal. The results show: when using pure copper, silver and nickel (thickness is less than 0.5 mm) as brazing filler metal, the combination, laser power of 1.2 kW and welding speed at 0.1 m/s, leads to complete penetration with good weld formation. However, when using Cu/Invar/Ni as brazing filler metal, laser power should increase to 1.7 kW if we still using a higher welding speed (0.1 m/s). Although a trial of high speed welding in laser welding-brazing exhibits feasibility, as-welded joints still have much more brittle risks due to the higher residual stresses.

show abstract

Section: Introductionmentioning

confidence: 99%

Effect of Brazing Filler Metals and Welding Parameters on Laser Welding-Brazing Joints of WC-Co to S1045

et al. 2022

Metals

View full text Add to dashboard Cite

show abstract

“…Under vibration and impact, cemented carbide composites have low toughness due to the inherent brittle nature of carbides [11][12][13]. Joining of WC-Co to structural steel is a dissimilar material joining problem [14], involving various joining techniques, including brazing [15][16][17], diffusion bonding [18][19][20], fusion welding [21][22][23][24], and partial transient liquid-phase bonding [25]. Among the joining techniques, brazing is a commonly used technique for joining cemented carbides to steels, because of its simple processing and relatively low cost.…”

Section: Introductionmentioning

confidence: 99%

Progress in Improving Joint Strength of Brazed Cemented Carbides and Steels

Sharma

Kannan

Hogan

et al. 2021

Science and Technology of Welding and Joining

View full text Add to dashboard Cite

Surface mining causes significant wear damage that affects equipment performance, reliability, and lead to associated downtime costs. To improve the wear resistance of components used in natural resources industries, cemented carbide tiles are joined to engaging surfaces of the components. Joining of cemented carbide to structural steel can be achieved by various processes, among which brazing is commonly used owing to its relatively simple processing and low cost. A significant challenge in brazing cemented carbide tiles to steels is the poor joint strength. This article aims to review the recent progress in improving joint strength of cemented carbide/steel brazing. Recent progress on the key factors, including type of filler metals, evolution of joint microstructure, generation of residual stresses, and process parameters have been closely examined and critically analysed. Future directions of research on brazing cemented carbide tiles to steel in order to improve joint strength have been proposed.

show abstract