Microstructure and Wear Resistance of 62Cu-38Zn Brass with Bionic Coupling Units Treated by Laser Cladding

Cr3C2-NiCr has high quality of wear resistant properties and is widely used in abrasive environment. In this paper, Cr3C2-NiCr coating was prepared on 45 steel by laser cladding technology. Analysis and research of the coatings were achieved by SEM and XRD to determine the main component and the different region on coatings. The hardness and the element component were investigated by micro-hardness tester and EDS. Abrasion tests were performed to contrast the wear resistance of two materials. The results indicate that the hardness of the coatings is nearly 3 times as the substrate. The coatings are well combined with the substrate and the phase of Cr3C2 has a large proportion in the coatings. Abrasion tests show that the average of wear rate on substrate is 5.2 times as the coatings.

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Diode Laser Cladding on A5052 Aluminium Alloy for Wear Resistance

Heat Transfer: Volume 3 ◽

10.1115/ht2005-72442 ◽

2005 ◽

Cited By ~ 1

Author(s):

Shingo Iwatani ◽

Yasuhito Ogata ◽

Keisuke Uenishi ◽

Kojiro F. Kobayashi ◽

Akihiko Tsuboi

Keyword(s):

Wear Resistance ◽

Aluminium Alloy ◽

Diode Laser ◽

Laser Cladding ◽

Co2 Laser ◽

Reaction Layer ◽

Heat Input ◽

Aluminium Content ◽

Alloy Substrate ◽

Clad Layer

In order to improve a wear resistance of aluminium alloy, we proposed a diode laser cladding on the surface of a A5052 aluminium alloy. Firstly, an applicability of diode laser to laser cladding was evaluated. In this result, application of diode laser made it possible to obtain stable beads in low heat input compared with CO2 laser. According to the increase in aluminium content in the obtained clad layer, the microstructure of the clad layer changed as γ (8∼20%) → γ + α (10∼30%) → Fe3Al (30%∼). At the interface between the clad layer and the aluminium alloy substrate, the reaction layer consisting of Fe2Al5 and FeAl3 formed. In the abrasion wear the obtained clad layers exhibited a higher wear resistance compared with the aluminium alloy.

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Fabrication of SiC Particulates Reinforced MoSi2 Composite Coating by Laser Cladding

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.373-374.304 ◽

2008 ◽

Vol 373-374 ◽

pp. 304-307

Author(s):

Sen Yang ◽

Ming Run Wang ◽

Tao Gong ◽

Wen Jin Liu

Keyword(s):

Wear Resistance ◽

Laser Cladding ◽

Continuous Wave ◽

Steel Substrate ◽

Laser Output Power ◽

Scanning Velocity ◽

Sic Particulates ◽

Metallurgical Bond ◽

Improve Wear Resistance

In order to improve wear resistance of carbon steel, laser cladding experiments were carried out using a 3kW continuous wave CO2 laser. The diameter of the laser beam was 3-5mm, the scanning velocity was 3-10mm/s, and the laser output power was 1.0-1.3kW. The experimental results showed that MoSi2/SiCP composites coating could be in-situ synthesized from mixture powders of molybdenum, silicon and SiC by laser cladding. A good metallurgical bond between the coating and the substrate could be achieved. The microstructures of the coating were mainly composed of MoSi2, SiC and FeSiMo phases. The average microhardness of the coating was about HV0.21300, about 6.0 times larger than that of steel substrate.

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MICROSTRUCTURES AND DRY SLIDING WEAR RESISTANCE OF THE LASER CERAMICS COMPOSITE COATING ON PURE Ti

Surface Review and Letters ◽

10.1142/s0218625x12500175 ◽

2012 ◽

Vol 19 (03) ◽

pp. 1250017 ◽

Cited By ~ 4

Author(s):

PENG LIU ◽

YUANBIN ZHANG ◽

HUI LUO ◽

YUSHUANG HUO

Keyword(s):

Wear Resistance ◽

Composite Coating ◽

Laser Cladding ◽

Dry Sliding Wear ◽

X Ray Diffraction ◽

Phase Constituent ◽

Fine Grain ◽

Fine Grain Strengthening ◽

Modification Technique ◽

Surface Performance

In this study, Al–Ti–Co was used to improve the surface performance of pure Ti . Laser cladding is an important surface modification technique, which can be used to improve the surface performance of pure Ti . Laser cladding of the Al–Ti–Co + TiB2 pre-placed powders on pure Ti can form ceramics reinforced the composite coating, which improved the wear resistance of the substrate. Characteristics of the composite coating were investigated using X-ray diffraction (XRD), scanning electron microscopy (SEM), microhardness and wear tests. And the laser-cladded coating can also have major dilution from the substrate. Due to the action of the fine grain strengthening and the phase constituent, the wear resistance and microhardness of pure Ti surface were greatly improved.

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Effects of Bionic Structure on Thermal Fatigue and Wear Resistance of Laser Cladding on Nickel-based Powder

Journal of Materials Research and Technology ◽

10.1016/j.jmrt.2021.04.034 ◽

2021 ◽

Author(s):

Fangping Yao ◽

Lijin Fang ◽

Gao song Li

Keyword(s):

Wear Resistance ◽

Laser Cladding ◽

Thermal Fatigue ◽

Bionic Structure

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The Microstructure Evolution and Wear Resistance of Laser Cladding M2 High Speed Steel on Nodular Cast Iron

Proceedings of the International Workshop on Materials, Chemistry and Engineering ◽

10.5220/0007441805840590 ◽

2018 ◽

Author(s):

N. J. Xu ◽

C. S. Liu ◽

Z. B. Wang ◽

T. Sun

Keyword(s):

Wear Resistance ◽

Cast Iron ◽

Laser Cladding ◽

Microstructure Evolution ◽

High Speed ◽

High Speed Steel ◽

Nodular Cast Iron ◽

M2 High Speed Steel

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Laser Cladding of Ni-Co-W Composite Coating on Stainless Steel to Enhance Wear Resistance

Materials Science ◽

10.5755/j02.ms.28686 ◽

2021 ◽

Author(s):

Linlin ZHANG ◽

Dawei ZHANG

Keyword(s):

Stainless Steel ◽

Wear Resistance ◽

Composite Coating ◽

Laser Cladding ◽

Composite Coatings ◽

Eutectic Structure ◽

Wear Properties ◽

Fine Grained ◽

Noticeable Improvement ◽

Enhance Wear Resistance

Ni-Co-W composite coatings modified by different contents of Co-based alloy powder in the Ni-based alloy with 35 wt.% WC (Ni35WC) were deposited on stainless steel by laser cladding. The influence of compositional and microstructural modification on the wear properties has been comparatively investigated by XRD, SEM, and EDS techniques. It was found that the austenite dendrites in the modified coating adding 50 wt.% Co-based alloy were refined and a lot of Cr23C6 or M23(C, B)6 compounds with fine lamellar feature were formed around austenitic grain boundaries or in the intergranular regions. The contribution of element Co to the modification of Ni35WC coating is that it cannot only promote the formation of more hard compounds to refine austenite grains, but also refine the size of precipitates, and change the phase type of eutectic structure as a result of disappeared Cr boride brittle phases. A noticeable improvement in wear resistance is obtained in the Ni35WC coating with 50 wt.% Co-based alloy, which makes the wear rate decreased by about 53 % and 30% by comparison to that of the substrate and the Ni35WC coating, respectively. It is suggested that the improvement is closely related to the composite coating being strengthened owing to the increase of coating hardness, formation of a fine-grained microstructure caused by Co, and fine hard precipitate phases in the eutectic structure.

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Effect of High−Speed Powder Feeding on Microstructure and Tribological Properties of Fe−Based Coatings by Laser Cladding

Coatings ◽

10.3390/coatings11121456 ◽

2021 ◽

Vol 11 (12) ◽

pp. 1456

Author(s):

Qiang Wang ◽

Runling Qian ◽

Ju Yang ◽

Wenjuan Niu ◽

Liucheng Zhou ◽

...

Keyword(s):

Wear Resistance ◽

Laser Cladding ◽

Tribological Properties ◽

Wear Mechanism ◽

High Speed ◽

High Efficiency ◽

Adhesive Wear ◽

Steel Substrate ◽

Powder Materials ◽

Powder Feeding

In order to improve the wear resistance of 27SiMn steel substrate, Fe−based alloy coatings were prepared by laser cladding technology in the present study. In comparison to the conventional gravity powder feeding (GF) process, high−speed powder feeding (HF) process was used to prepare Fe−based alloy coating on 27SiMn steel substrate. The effect of diversified energy composition of powder materials on the microstructure and properties of coatings were systematically studied. X−ray diffractometer (XRD), optical microscope (OM) and scanning electron microscope (SEM) were used to analyze the phase structure and microstructure of Fe−based alloy coatings, and the hardness and tribological properties were measured by the microhardness tester and ball on disc wear tester, respectively. The results show that the microstructure of conventional gravity feeding (GF) coatings was composed of coarse columnar crystals. In comparison, owing to the diversification of energy composition, the microstructure of the high−speed powder feeding (HF) coatings consists of uniform and small grains. The total energy of the HF process was 75.5% of that of the GF process, proving that high−efficiency cladding can be achieved at lower laser energy. The refinement of the microstructure is beneficial to improve the hardness and wear resistance of the coating, and the hardness of the HF coating increased by 9.4% and the wear loss decreased to 80.5%, compared with the GF coating. The wear surface of the HF coating suffered less damage, and the wear mechanism was slightly adhesive wear. In contrast, wear was more serious in the GF coating, and the wear mechanism was transformed into severe adhesive wear.

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