Microstructure and wear resistance of composite layers on a ductile iron with multicarbide by laser surface alloying

In the essay, the Low carbon ductile iron by laser surface alloying processing has been experimentally studied. Results indicate that on low carbon ductile iron matrix coated with different alloy powder, structure of laser surface alloying processing is very small, the combination quality between alloying layer and matrix is good. Low carbon ductile iron after laser surface treatment, maternal surface hardness are greatly enhanced, maternal surface hardness increasing from HV250~330 to the highest about HV1400, surface laser hardening effect of Low carbon ductile iron is very obvious.

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Laser surface alloying of copper with titanium: Part I. Electrical wear resistance in dry condition. Part II. Electrical wear resistance in wet and corrosive condition

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2016.04.008 ◽

2016 ◽

Vol 297 ◽

pp. 58-73 ◽

Cited By ~ 8

Author(s):

C.T. Kwok ◽

P.K. Wong ◽

H.C. Man

Keyword(s):

Wear Resistance ◽

Laser Surface ◽

Surface Alloying ◽

Laser Surface Alloying ◽

Electrical Wear

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The comparative study of W/Cr addition in Fe-base by laser surface alloying on fatigue wear resistance of GCI

Surface and Coatings Technology ◽

10.1016/j.surfcoat.2015.12.009 ◽

2016 ◽

Vol 286 ◽

pp. 25-35 ◽

Cited By ~ 14

Author(s):

Zhi-kai Chen ◽

Chao Meng ◽

Ji-xing Dong ◽

Ti Zhou ◽

Xin Tong ◽

...

Keyword(s):

Wear Resistance ◽

Comparative Study ◽

Laser Surface ◽

Surface Alloying ◽

Fatigue Wear ◽

Laser Surface Alloying ◽

Cr Addition ◽

The Comparative Study

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TiC Reinforced Steel Matrix Composite Layers Produced by Laser Surface Alloying

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.59.55 ◽

2008 ◽

Vol 59 ◽

pp. 55-61 ◽

Cited By ~ 1

Author(s):

A. Fernández-Vicente ◽

G. Castro ◽

J.L. Arias ◽

Maria Angeles Montealegre

Keyword(s):

Wear Resistance ◽

Feeding Rate ◽

Laser Surface ◽

Beam Power ◽

Powder Injection ◽

Steel Matrix ◽

Surface Alloying ◽

Feeding Rates ◽

Laser Surface Alloying ◽

Powder Feeding

In the present work, laser surface alloying of H13 tool steel by using TiC has been performed by means of DHPDL (Direct high power diode laser). Different layers were produced by varying laser beam power and powder feeding rate. Several alloying degrees were obtained depending on the laser parameters employed. Laser surface alloyed layers were analyzed by using optical and scanning electron microscopy. Wear resistance was evaluated through pin-on-disk tests at room temperature. In general, it was observed that dilution of TiC powders into the molten H13 substrate decreased as the powder-feeding rate increased and particles size of the titanium carbide precipitates was larger for the higher feeding rates. Wear measurements showed lower values for the wear resistance coefficient of laser alloying layers produced at higher values of the powder injection (feeding) rate. Analysis of the wear surface track was conducted and the specific contribution of the microstructural features on the wear coefficient was assessed. Thus, it was found that larger particles sizes and particle contents protected the martensitic and dendritic steel matrix from being deeply worn. Lower TiC contents in the alloyed layer gave rise to a higher contribution of the plastic deformation in the wear track.

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