Abrasive wear performance and microstructure of laser clad WC/Ni layers

Huang, Shihping Kevin; Samandi, M.; Brandt, Milan

doi:10.1016/s0043-1648(03)00526-x

Cited by 165 publications

(66 citation statements)

References 8 publications

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“…Small sized particles tend to dissolve faster than coarser. Moreover, as reported by other researchers [23,24] eutectic tungsten carbides are more prone to react with the liquid melt, than more thermally stable carbides such as mono crystalline carbides consisting of hexagonal WC.…”

Section: Introductionsupporting

confidence: 53%

Tribological Characteristics of Tungsten Carbide Reinforced Arc Sprayed Coatings using Different Carbide Grain Size Fractions

Tillmann¹,

Hagen²,

Schröder³

2017

Tribol. Ind.

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Section: Introductionsupporting

confidence: 53%

Tribological Characteristics of Tungsten Carbide Reinforced Arc Sprayed Coatings using Different Carbide Grain Size Fractions

Tillmann¹,

Hagen²,

Schröder³

2017

Tribol. Ind.

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“…While nickel, cobalt, iron and titanium based alloys are used as matrix in the production of these composite coatings, in terms of reinforcement elements, hard reinforcement particles such as SiC, TiC, B 4 C, WC, TiB 2 and Cr 3 C 2 are preferred [9][10][11][12][13][14][15][16][17]. Recently, the application of B 4 C in the surface coating pocesses has attracted more and more attentions for its super hardness, thermal stability, high melting point (2450 °C), low density (2.52 g/cm 3 ) and super mechanical properties [18].…”

Section: Introductionmentioning

confidence: 99%

Wear Characteristics of FeW/FeW-B4C Coatings Produced by TIG Process

Islak

2017

Archives of Metallurgy and Materials

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In this study, wear properties of FeW-B 4 C coatings produced by tungsten inert gas (TIG) process on the AISI 1060 steel were investigated. TIG process was selected because it is a cost-effective approach for melting-based coatings. The treated surfaces were evaluated and characterized by means of scanning electron microscope (SEM), X-ray diffraction analysis, and electron dispersive spectrometry (EDS). The microhardness and wear experiment were also performed by using a microhardness machine and ball-ondisk tribometer. SEM observations showed that the obtained coating had a smooth and uniform surface. According to XRD analysis, borides and carbides phases formed in the coatings. The wear behavior of the coatings was compared with ball-on-disc configuration wear tests, at the same conditions. Average coefficient of friction values of the coatings were obtained at relatively low levels.

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“…The advantages of laser cladding over the conventional processes of surface modification have been well documented, such as minimum dilution, minimal distortion of substrate, finer microstructure, higher wear and corrosion resistances, etc. [1][2][3][4][5] In the die industry, it is commonly agreed that residual tool life can be successfully extended by timely repair of damaged surfaces by laser cladding. 6,7) Laser cladding with powder feed is a multi-parameter process, such as laser power, laser beam profile, laser scanning speed, powder feeding rate, material properties, etc.…”

Section: Introductionmentioning

confidence: 99%

Effects of Process Parameters on Microstructure and Hardness of Layers by Laser Cladding

et al. 2011

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Fig. 9. The macro-morphology and the corresponding microstructure from traverse cross-section built with different technological parameters. V s and V f refer to the laser scanning speed and the powder feeding rate, respectively. The laser power P is 2 kW for all the specimens.creased, the duration of the laser beam interaction on the powder and the substrate becomes shorter, which results in less heat input of the laser cladding. After certain a threshold of the laser scanning speed, energy available will be insufficient to fuse the powder to the substrate, and an incomplete fusion appears. A relatively weak bonding between the layer and the substrate will be formed. This phenomenon is undesired. By adjusting the processing parameters, this phenomenon will be eliminated. Similarly, under a given laser scanning speed, the powder feeding rate also exists a threshold. When the powder feeding rate is higher, the powder flux shields the laser beam. The energy which melts the substrate mostly comes from that of permeated from the cladding powders is so small that it causes insufficient substrate melting, the metallurgical bonding between the cladding layer and the substrate can't also achieved. The laser cladding process doesn't realize. In a word, on condition that other technological parameters hold immutable, a given laser scanning speed corresponds with a critical powder feeding rate and a given powder feeding rate also corresponds with a critical laser scanning speed. Furthermore, the critical powder feeding rate decreases accompanying the increase of the laser scanning speed at the same technological condition. Similarly, the critical laser scanning speed decreases with the increase of the powder feeding rate. In practice, the adjustment of the powder feeding rate should limit within the critical powder feeding rate at a given scanning speed and the adjustment of the scanning speed should limit within the critical scanning speed at a given powder feeding rate. A good matching of the scanning speed and the powder feeding rate is necessary in laser cladding. The Microhardness of Cladding LayersThe microhardness is an important index to evaluate the material properties. It is possible to understand the mechanical properties of the cladding layer by means of the microhardness across the layer, at least on a rough scale. The microhardness measurement across the transverse cross-section of the sample was carried out using microhardness tester. Figure 10 exhibits the effects of the laser scanning speed and the powder feeding rate on microhardness distribution of the transverse section of the sample. Horizontal ordinate represents the vertical distance from the substrate to the measuring point of the sample and vertical ordinate represents the Vickers hardness of the measuring point. From Fig. 10, it can be observed that with the increasing of the distance, the hardness profiles all present increasing trend. It is apparent that the microhardness of the laser cladding layer is much higher than that of the substrate and...

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Abrasive wear performance and microstructure of laser clad WC/Ni layers

Cited by 165 publications

References 8 publications

Tribological Characteristics of Tungsten Carbide Reinforced Arc Sprayed Coatings using Different Carbide Grain Size Fractions

Tribological Characteristics of Tungsten Carbide Reinforced Arc Sprayed Coatings using Different Carbide Grain Size Fractions

Wear Characteristics of FeW/FeW-B4C Coatings Produced by TIG Process

Effects of Process Parameters on Microstructure and Hardness of Layers by Laser Cladding

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