Microstructure and Properties of TiC/Ni Composite Coating Prepared with Laser Clad on Q235 Steel Substrate

High velocity arc spraying was used to prepare FeCrAl/Al composite coating on Q235 steel substrate by simultaneously spraying FeCrAl wire as the anode and Al wire as the cathode. The composite coating was sprayed with varying voltage and current to obtain optimum coating characteristics. FeCrAl coating was also prepared for comparison purposes. The surface microstructure of the coatings was characterized by scanning electron microscope (SEM) and X-ray diffraction (XRD). The average microhardness of the coatings and the substrate was analyzed and compared. Corrosion resistance was investigated by means of electrochemical tests. The image results showed that a lamellar structure consisted of interwoven layers of FeCrAl and Al. Al and FeCr constituted the main phases with traces of oxides and AlFe intermetallic compounds. The average porosity was reduced and microhardness of the coatings was improved with increasing voltage and current. The FeCrAl/Al coating formed alternating layers of hard and ductile phases; the corrosion resistance of the coatings in the sodium chloride (NaCl) solution depended on the increase in Al content and spray parameters. The corrosion resistance tests indicated that FeCrAl/Al coating had a better corrosion resistance than the FeCrAl coating. FeCrAl/Al can be used to coat steel substrates and increase their corrosion resistance.

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Microstructure and Wear Resistance of TiC+Cr7C3 Reinforced Ceramal Composite Coating Produced by PTA Weld-Surfacing Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.97-101.1377 ◽

2010 ◽

Vol 97-101 ◽

pp. 1377-1380 ◽

Cited By ~ 2

Author(s):

Jun Hai Liu ◽

Ji Hua Huang ◽

Jun Bo Liu ◽

Gui Xiang Song

Keyword(s):

Wear Resistance ◽

Composite Coating ◽

Steel Substrate ◽

Wear Test ◽

Primary Phase ◽

Dry Sliding Wear ◽

X Ray ◽

Q235 Steel ◽

High Microhardness ◽

New Type

A new type in situ reinforcing phase TiC+Cr7C3 ceramal composite coating was fabricated on substrate of Q235 steel by plasma transferred arc (PTA) weld-surfacing process using the mixture of ferrotitanium, ferrochromium, ferroboron and ferrosilicium powders. Microstructure and wear performance of the coating were investigated by means of X-ray diffraction (XRD), scanning electron micrograph (SEM), energy dispersive X-ray analysis (EDS), microhardness tester and wear tester. Results show that the composite coating consists of TiC, primary phase Cr7C3 , (Cr,Fe)7C3 and austenite. The composite coating is metallurgically bonded to the Q235 steel substrate. TiC particles present cubic and “dendrite flower-like” shape in the composite coating. The coating has high microhardness and excellent wear resistance under dry-sliding wear test conditions.

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Microstructure and Properties of Brush Electroplated Nano-SiC-Al2O3/Ni Composite Coating

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.373-374.285 ◽

2008 ◽

Vol 373-374 ◽

pp. 285-288 ◽

Cited By ~ 4

Author(s):

Hua Yang ◽

Shi Yun Dong ◽

Bin Shi Xu

Keyword(s):

Zeta Potential ◽

Composite Coating ◽

Nickel Coating ◽

Steel Substrate ◽

Pure Nickel ◽

Nano Particles ◽

Strengthening Effect ◽

Microstructure And Properties ◽

1045 Steel ◽

Sic Particle

This paper investigated the effect of nano-SiC particle on microstructure and properties of brush electroplated nano-Al2O3/Ni composite coating. Three kinds of coatings, such as pure nickel coating, nano-Al2O3/Ni composite coating and nano-SiC-Al2O3/Ni composite coating, were fabricated on 1045 steel substrate. Before deposited, Zeta potential of nano-particles in the solution was examined. The results show Zeta potential of the nanoparticles in the nano-Al2O3/Ni electrolyte is negative, but that of the nanoparticles in nano-SiC-Al2O3/Ni electrolyte is positive when the pH value of electrolyte is about 7.5. Energy dispersive spectroscopy (EDS) results show Al element content in the nano-Al2O3/Ni coating is 5.65%, while the content of Al and Si elements in nano-SiC-Al2O3/Ni coating is 5.63% and 4.86% respectively. It confirms that nano-SiC particle co-deposited in the composite coating while nano-Al2O3 particle content keeps constant. The microhardness of nano-SiC-Al2O3/Ni coating exhibits the highest, while the pure nickel coating is the lowest. And surface morphology of nano-SiC-Al2O3/Ni coating is the most smooth and compact among the three coatings. The wear test results reveal that wear resistance of nano-SiC-Al2O3/Ni coating is 1.7 times of that of nano-Al2O3/Ni coating, and 2.3 times of that of pure nickel coating. The above results show the nano-SiC particle services a strengthening effect on the combination performance of nano-SiC-Al2O3/Ni coating.

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Fe-Cr-C-TiC High-Chromium Fe-Based Ceramic Composite Coating Prepared by PTA Weld-Surfacing Process

Materials Science Forum ◽

10.4028/www.scientific.net/msf.675-677.783 ◽

2011 ◽

Vol 675-677 ◽

pp. 783-787 ◽

Cited By ~ 6

Author(s):

Li Mei Wang ◽

Jun Bo Liu ◽

Chi Yuan

Keyword(s):

Composite Coating ◽

Ceramic Composite ◽

Steel Substrate ◽

Wear Properties ◽

High Chromium ◽

Q235 Steel ◽

Plasma Transferred Arc ◽

Transferred Arc ◽

Microhardness Tester

In situ synthesized Fe-Cr-C-TiC high-chromium Fe-based ceramic composite coating was fabricated on substrate of Q235 steel by plasma transferred arc (PTA) weld-surfacing process using the mixture of ferrotitanium, ferrochromium, ferroboron and ferrosilicium powders. The microstructure and wear properties of the composite coating were investigated by XRD, SEM, EDS, microhardness tester and wear tester. Results show that the coating consists of TiC, (Cr,Fe)7C3 and austenite. The coating is metallurgically bonded to the Q235 steel substrate. TiC particles formed by PTA weld-surfacing process present cubic, dendrite and flower-like shape. The wear resistance of the composite coating is approximately 11 times higher than that of the base body Q235. As the load increases, the wear mass loses slowly, which demonstrates the composite coating has excellent load character.

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Microstructure and Wear Resistance of In Situ Synthesized TiC-TiB2 Particulate Reinforced Ni-Based Composite Coating by Argon-Arc Cladding

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.1004-1005.763 ◽

2014 ◽

Vol 1004-1005 ◽

pp. 763-767

Author(s):

Zhen Ting Wang ◽

Fan Feng

Keyword(s):

Wear Resistance ◽

Composite Coating ◽

Steel Substrate ◽

Energy Dispersive Spectrometer ◽

X Ray Diffraction ◽

Q235 Steel ◽

Clad Layer ◽

Precursor Powders ◽

Particulate Reinforced

In situ synthesized TiC-TiB2reinforced Ni based coating was fabricated by argon arc cladding on Q235 steel substrate using titanium, boron carbide, Ni60 as the precursor powders. The phase composite on and microstructure of the clad layer were investigated by means of X-ray diffraction analysis (XRD), scanning electron microscopy (SEM) and Energy Dispersive Spectrometer (EDS). The results show that uniformly distributed TiC particles with the black petals shape and TiB2particles with rod shape could be synthesized by the situ reaction. Compared to those unreinforced Q235 steel substrate, the hardness and the wear resistance of TiC-TiB2reinforced Ni based composite coating were significantly enhanced.

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Microstructure and Wear Properties of TiC/Fe-Based Composite Coating Prepared by PTA Weld-Surfacing Process

Advanced Materials Research ◽

10.4028/www.scientific.net/amr.652-654.1780 ◽

2013 ◽

Vol 652-654 ◽

pp. 1780-1786

Author(s):

Zhong Li Zhao ◽

Kai Fang Dang ◽

Jun Hai Liu ◽

Da Ming Wu ◽

Ying Liu ◽

...

Keyword(s):

Composite Coating ◽

Adhesive Wear ◽

Steel Substrate ◽

Wear Test ◽

X Ray Diffraction ◽

Scanning Electron Micrograph ◽

Wear Properties ◽

X Ray ◽

Q235 Steel ◽

Plasma Transferred Arc

The TiC/Fe-based composite coating was fabricated by plasma transferred arc (PTA) weld-surfacing process on substrate of Q235 steel with the mixture of ferrotitanium, ferrochromium and ferrosilicium powders. The microstructure and wear properties of the coating were investigated by means of X-ray diffraction (XRD), scanning electron micrograph (SEM), energy dispersive X-ray analysis (EDS), microhardness test and wear test. The results show that the coating consists of TiC, (Cr,Fe)7C3 and austenite. The composite coating is metallurgically bonded to the Q235 steel substrate. TiC particles formed by PTA weld-surfacing process presented cubic or “dendrite flower-like” morphology. The wear-resisting property of the coating was greatly improved compared with the substrate. The coating has excellent adhesive wear and grinding abrasion resisting force.

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