Electroplating of Chromium Incorporating High-Dispersion Black Carbon Particles

Electrochemical composite coatings allow successfully solving many practical problems of surface-hardening of structural parts and their tooling components, as well as renewing their fast-wearing components. Electrochemical chromium-matrix composite coatings are used to enhance the thermal and wear resistance of steel articles and parts operating in friction conditions and under increased temperatures, but under low shock loads. This paper presents the results obtained from studying how fine black carbon particles affect the properties of composite coatings. Optimal conditions are found for producing high-quality coatings, such as the suspended electrolyte mixing rate and graphite concentration in electrolyte. We have also studied how heat treatment affects the microhardness and surface morphology of coatings. High-dispersed black graphite can be used to produce chromium-matrix composite coatings having increased microhardness and wear resistance.

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Investigation on the relationship between NbC and wear-resistance of Fe matrix composite coatings with different C contents

Applied Surface Science ◽

10.1016/j.apsusc.2018.01.034 ◽

2018 ◽

Vol 439 ◽

pp. 468-474 ◽

Cited By ~ 12

Author(s):

Changchun Zhao ◽

Yefei Zhou ◽

Xiaolei Xing ◽

Sha Liu ◽

Xuejun Ren ◽

...

Keyword(s):

Wear Resistance ◽

Matrix Composite ◽

Composite Coatings ◽

The Relationship

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Microstructure and wear resistance of laser clad TiC reinforced FeAl intermetallic matrix composite coatings

Surface and Coatings Technology ◽

10.1016/s0257-8972(02)00881-2 ◽

2003 ◽

Vol 168 (1) ◽

pp. 30-36 ◽

Cited By ~ 33

Author(s):

Y Chen ◽

H.M Wang

Keyword(s):

Wear Resistance ◽

Matrix Composite ◽

Composite Coatings ◽

Intermetallic Matrix ◽

Intermetallic Matrix Composite

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Dry Sliding Wear Behavior of Laser Clad WC/NiCrBSi Metal Matrix Composite Coatings

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.690-693.3327 ◽

2013 ◽

Vol 690-693 ◽

pp. 3327-3333

Author(s):

Jiao Xi Yang ◽

Xuan He Miao

Keyword(s):

Wear Resistance ◽

Metal Matrix Composite ◽

Matrix Composite ◽

Metal Matrix ◽

Sliding Wear ◽

Wear Behavior ◽

Composite Coatings ◽

Dry Sliding Wear ◽

Different Types ◽

Worn Surfaces

Different types of WC/NiCrBSi metal matrix composite coatings were deposited by laser cladding. The wear resistance of these composite coatings was tested with a ring-on-disc (MMG-10) apparatus. The morphologies of the worn surfaces were observed using a scanning electron microscopy (SEM) equipped with an energy dispersive spectroscopy (EDS) for elemental composition. The results showed that the wear resistance of the laser clad WC/Ni-based composite coatings increased significantly with increasing WC mass fraction. It had also been suggested that the composite coating containing 60 wt% agglomerate WC had superior wear resistance property. The wear mechanism was then discussed on the basis of microscopic observations of the worn surfaces.

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Effect of type of reinforcing particles on the deposition efficiency and wear resistance of low-pressure cold-sprayed metal matrix composite coatings

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2017.05.057 ◽

2017 ◽

Vol 324 ◽

pp. 190-200 ◽

Cited By ~ 24

Author(s):

Yik Tung Roy Lee ◽

Hossein Ashrafizadeh ◽

Gary Fisher ◽

André McDonald

Keyword(s):

Wear Resistance ◽

Metal Matrix Composite ◽

Matrix Composite ◽

Metal Matrix ◽

Composite Coatings ◽

Deposition Efficiency ◽

Low Pressure ◽

Reinforcing Particles

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On effect of surface hardening on impact and abrasive wear resistance of Hadfi eld steel

10.36652/1813-1336-2020-16-6-252-255 ◽

2020 ◽

pp. 252-255

Author(s):

V.I. Bolobov ◽

V.S. Bochkov ◽

E.V. Akhmerov ◽

V.A. Plashchinsky ◽

E.A. Krivokrisenko E.A.

Keyword(s):

Plastic Deformation ◽

Wear Resistance ◽

Abrasive Wear ◽

Work Hardening ◽

Surface Hardening ◽

Cold Work ◽

Abrasive Wear Resistance ◽

Hadfield Steel ◽

Mining Equipment ◽

Effect Of Surface

On the example of Hadfield steel, as the most common material of fast-wearing parts of mining equipment, the effect of surface hardening by plastic deformation on their impact and abrasive wear resistance is considered. Wear test is conducted on magnetic ironstone as typical representative of abrasive and hard rock. As result of wear of initial samples with hardness of ∼200 HB and samples pre-hardened with different intensities to the hardness of 300, 337 and 368 HB, it is found that during the initial testing period, the initial samples pass the “self-cold-work hardening” stage with increase in hardness to ∼250 HB, which remains virtually unchanged during further tests; the hardness of the pre-hardened samples does not change significantly throughout the tests. It is established that the rate of impact-abrasive wear of pre-hardened samples is significantly (up to 1.4 times) lower than the original ones that are not subjected to plastic deformation, and decreases with increasing degree of cold-work hardening. Preliminary surface hardening by plastic deformation can serve as effective way to increase the service life of fast-wearing working parts of mining equipment.

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