scholarly journals Wear Properties of TiC-Reinforced Co50 Composite Coatings from Room Temperature to High Temperature

2020 ◽  
Vol 2020 ◽  
pp. 1-21
Author(s):  
Nga Thi-Hong Pham ◽  
Van-Thuc Nguyen
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Laser Cladding ◽  
Wear Mechanism ◽  
Room Temperature ◽  
Steel Substrate ◽  
Composite Coatings ◽  
H13 Steel ◽  
Fatigue Wear ◽  
Wear Rates

In this paper, the laser cladding is created by using Co50 powder and TiC mixture, covering a H13 hot-working steel substrate. The samples are analyzed by the hardness test, XRD, SEM, and friction test to identify the forming phases, microhardness distribution, and wear-resistant characteristics. The results indicated that hardness reduces from the coating zone to the substrate, achieving the highest value at the coating zone. Increasing the content of TiC results in improving the coating hardness. The coatings with 10%–20% TiC show high-quality surface morphology and macrograph. With 30% TiC, the hardness obtains a higher hardness, but the surface appears to crack. The microstructures of the coatings present a well-mixed and well-distribution of the TiC particle on the Co matrix. The friction coefficient of H13 steel and Co50 coating reaches the maximum value when the load is 50 N and mostly decreases with the increase in the load. The wear rates of H13 steel and Co50 coatings mainly increase with the increase in the load. The temperature has a greater influence on the friction coefficient of the Co50 coating. However, the temperature has a small effect on the friction coefficient of the 20% TiC coating. The wear resistance of 20% TiC coating is higher than that of H13 steel, Co50 coating, and 10% TiC composite coating. At room temperature, the wear mechanism of the coating is mainly brittle spalling, adhesive wear, and ploughing. At 700°C, the wear mechanism is mostly oxidation wear and fatigue wear. After laser cladding, the service life of the coated surface could be greatly improved. The Co + 20% TiC coating has high hardness and wear resistance.

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

Coatings ◽  
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.

Wear Resistance of Laser Cladded NiCrFeSiB Self-Fluxing Composite Coatings

2016 ◽  
Vol 254 ◽  
pp. 290-295
Author(s):  
Iosif Hulka ◽  
Ion Dragoş Uţu ◽  
Viorel Aurel Şerban ◽  
Alexandru Pascu ◽  
Ionut Claudiu Roată
Keyword(s):  
Wear Resistance ◽  
Laser Cladding ◽  
Wear Behavior ◽  
Protective Coatings ◽  
Steel Substrate ◽  
Composite Coatings ◽  
Base Material ◽  
Laser Cladding Process ◽  
Metallurgical Bond ◽  
Feedstock Material

Laser cladding process is used to obtain protective coatings using as heat source a laser. This melts the substrate and the feedstock material to create a protective coating and provides a strong metallurgical bond with minimal dilution of the base material and reduced heat affected zone. In the present study a commercial NiCrSiFeB composition was deposited by laser cladding process using different parameters onto the surface of a steel substrate. The obtained coatings were investigated in terms of microstructure, hardness and wear behavior. The experimental results revealed that the laser power had a considerable influence on the wear resistance of NiCrSiFeB coatings.

Tribology Behavior of Graphene Containing Ni-Based Composite Coating under Room Temperature

2015 ◽  
Vol 642 ◽  
pp. 30-33 ◽  
Author(s):  
Jian Liang Li ◽  
Juan Juan Chen ◽  
Dang Sheng Xiong ◽  
Yong Kang Zhang ◽  
Yong Kun Qin ◽  
...  
Keyword(s):  
Friction Coefficient ◽  
Wear Rate ◽  
Composite Coating ◽  
Room Temperature ◽  
Steel Surface ◽  
Tribological Behavior ◽  
Composite Coatings ◽  
Wear Rates ◽  
Gcr15 Steel ◽  
Cr Coating

The graphene containing Ni-based composite coatings with different graphene addition amounts were prepared on 45 steel surface by using dipulse composite electrodeposition technology. The tribological behavior of composite coating was tested by against GCr15 steel pin under the dry condition. The friction coefficient of composite coating is 20-30% lower than pure Cr coating, their wear rates are almost in the same magnitude. Compared with 45 steel, the friction coefficient of composite coating decreases and wear rate falls over 50%.

scholarly journals Influence of Graphene Sheet on Microstructure and Properties of Ni-based Alloy Coatings Prepared by Laser Cladding

2019 ◽  
Vol 25 (3) ◽  
pp. 252-258
Author(s):  
Geng TIANYUAN ◽  
Cunshan WANG
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Graphene Sheet ◽  
Laser Cladding ◽  
Steel Substrate ◽  
Diffusion Reaction ◽  
Forming Quality ◽  
Volume Fractions ◽  
Microstructure And Properties ◽  
Cladding Layers

Ni-based alloy cladding layers with different graphene sheet additions were prepared by laser cladding on the 40CrNi2Si2MoV steel substrate. The influence of the graphene sheet on the microstructure and properties of the cladding layers was investigated. The results show that owing to the diffusion-reaction dissolution, the graphene sheet addition does not bring a corresponding change in the phase constitutions of the cladding layers, i. e., the cladding layers are still composed of γ-Ni, Ni3B, and M7C3 phases. But what has changed is that the solidified structure is refined, and the volume fractions of the eutectic and the carbide are increased with the increase of graphene sheet addition. As a result, the hardness and the wear resistance of the cladding layers gradually increase, whereas the friction coefficient firstly decreases and then increases, with the lowest friction coefficient obtained at 0.5 vol.% graphene sheet addition. Compared to the Ni-based alloy cladding layers with micro-size graphite additions, the studied cladding layers exhibit improved hardness and wear resistance, good forming quality, and increased friction coefficient. DOI: http://dx.doi.org/10.5755/j01.ms.25.3.19173

THE EFFECT OF TiN, TiAlN, CrAlN, AND TiAlN/TiSiN COATINGS ON THE WEAR PROPERTIES OF AISI H13 STEEL AT ROOM TEMPERATURE

2019 ◽  
Vol 26 (09) ◽  
pp. 1950063 ◽  
Author(s):  
LEVENT KARA ◽  
HOJJAT GAHRAMANZADE ASL ◽  
ÖZCAN KARADAYI
Keyword(s):  
Wear Resistance ◽  
Wear Mechanism ◽  
Steel Substrate ◽  
Scratch Resistance ◽  
Wear Resistant Coating ◽  
H13 Steel ◽  
Wear Resistant ◽  
Aisi H13 Steel ◽  
Resistant Coating ◽  
Aisi H13

TiN, TiAlN, CrAlN and TiAlN/TiSiN films were deposited on AISI H13 hot work steel substrate by cathodic arc evaporation method. Each coating was optimized in laboratory conditions and the highest hardness and wear resistance coatings were taken into consideration for this study. Morphological properties, chemical compositions, crystallographic structure, nano hardness and adhesion strength of coatings were analyzed with SEM, AFM, EDS, XRD, nano indentation and scratch resistance tester. Wear experiments were performed using ball-on-disk tribometer against Al2O3 ball of 6[Formula: see text]mm diameter and wear volume of coatings were measured using optical profilometer. Wear experimental results revealed that all coated samples showed higher wear resistance and hardness than uncoated AISI H13 steel substrate. The highest wear and scratch resistances as well as nano hardness were attained for CrAlN coating. TiAlN coating has the lowest scratch resistance and wear resistance. Adhesive wear mechanism was the dominant wear mechanism for CrAlN coatings which is the highest wear resistant coating. Abrasive wear mechanism was the dominant wear mechanism for TiAlN coatings which is the lowest wear resistant coating.

Study on Laser Cladding Coatings of Ni-Based Alloy/TiC/Nickel-Coated Graphite on Steel Substrate

2010 ◽  
Vol 450 ◽  
pp. 214-218 ◽  
Author(s):  
Li Xia Ying ◽  
Li Dong Jiang ◽  
Fan Kai Kong ◽  
En Xia Yang
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Laser Cladding ◽  
Metal Surfaces ◽  
Steel Substrate ◽  
Extreme Conditions ◽  
Cross Sectional ◽  
Graphite Composite ◽  
Forming Mechanism ◽  
Uniform Microstructure

In order to improve the antiwear and antifriction performances of tribological metal surfaces for the extreme conditions, the composite coating has been fabricated on metal surfaces by the technology of laser cladding. In the experiment, Ni-based alloy, TiC and Nickel-coated graphite are used as the main ingredients of composite. The cross-sectional macrographs, microstructure, compositions, microhardness, tribological properties and the forming mechanism of the coating was tested and analyzed. Results show that laser cladding Ni60A/TiC/Nickel-coated graphite composite can obtain excellent coating with fully compact and uniform microstructure, and good interface with the substrate. The microhardness of the clad coating is over HV1000, which is five times higher than that of the steel substrate. The friction coefficient is reduced to about 0.4-0.5 in comparison with that of the steel substrate (about 0.7-0.8). At the same time, the wear resistance of the clad coating is also improved greatly.

Effects of Al2O3 mass fraction on microstructure and friction–wear performance of laser cladded Fe90 alloy coating

2021 ◽  
Vol ahead-of-print (ahead-of-print) ◽  
Author(s):  
Yan Hu ◽  
Dejun Kong
Keyword(s):  
Wear Resistance ◽  
Laser Cladding ◽  
Wear Mechanism ◽  
Mass Fraction ◽  
Alloy Coating ◽  
High Energy ◽  
Friction Reduction ◽  
Wear Performance ◽  
Content Type ◽  
Wear Rates

Purpose This paper aims to improve the friction reduction and wear resistance of Fe90 alloy coating by the addition of Al2O3. Design/methodology/approach Fe90 alloy coatings with the different Al2O3 mass fractions were prepared on Q235 steel by laser cladding (LC). The morphologies, phases and hardness of Fe90 alloy coating were analyzed using a scanning electron microscope (SEM), X-ray diffraction (XRD) and microhardness tester, respectively. The effects of Al2O3 mass fraction on the coefficient of friction (COF) and wear rates of Fe90 alloy coating were investigated using a friction tester, and the wear model was built to discuss the wear mechanism of Al2O3-reinforced Fe90 alloy coating. Findings The results show that the large number of Fe carbides is generated on the Fe90–Al2O3 coatings by the effect of laser high energy, and the hardness of Fe90–coating is 806 HV0.5, which is 4.48 times of substrate. The average COFs of Fe90–Al2O3 alloy coatings decrease from 0.73 to 0.55, and the wear rates are also reduced from 447.78 to 274.63 µm3•s–1•N–1 by the addition of Al2O3. The Fe90–6% Al2O3 coating presents the highest wear resistance among the three kinds of coatings, and the wear mechanism is abrasive wear and micro-cutting wear. Originality/value The Al2O3-reinforced Fe90 alloy coating was first fabricated by laser cladding, and the effect of Al2O3 on the friction-wear performance of Fe90 alloy coating was investigated.

scholarly journals Investigation on the Microstructure and Wear Behavior of Laser-Cladded High Aluminum and Chromium Fe-B-C Coating

Materials ◽  
2020 ◽  
Vol 13 (11) ◽  
pp. 2443
Author(s):  
Jingjing Li ◽  
Jiang Ju ◽  
Weiwei Chang ◽  
Chao Yang ◽  
Jun Wang
Keyword(s):  
Wear Resistance ◽  
Friction Coefficient ◽  
Abrasive Wear ◽  
Adhesive Wear ◽  
Wear Behavior ◽  
Steel Substrate ◽  
Lath Martensite ◽  
Wear Rates ◽  
Metallurgical Bond ◽  
High Aluminum

In this study, a high aluminum and chromium Fe-B-C coating was prepared using laser cladding on 2Cr13 steel substrate. The microstructure, microhardness, and wear resistance of the high aluminum and chromium Fe-B-C coating were investigated. The results show that this dense coating possesses good metallurgical bond with the substrate. The microstructure is mainly composed of α-(Fe, Cr, Al) lath martensite, orthorhombic M2B boride, orthogonal M3C2, and orthorhombic M7C3 carbides. The microhardness of the coating can reach 620 HV which is 3.3-times higher than that (190 HV) of the substrate. The coating shows a lower friction coefficient of 0.75 than that of the substrate (1.08). The wear rates of the substrate and the coating are 0.295 mg/min and 0.103 mg/min, respectively, indicating the coating exhibits excellent wear resistance. The wear mechanism transforms severe adhesive wear and abrasive wear of the substrate to slight abrasive wear of the coating. The results can provide technical support to improve the properties of the Fe-based laser cladded coating.

scholarly journals Evaluation of the Wear Resistance and Corrosion Behavior of Laser Cladding Al/SiC Metal Matrix Composite Coatings on ZE41 Magnesium Alloy

Coatings ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 639
Author(s):  
Ainhoa Riquelme ◽  
Pilar Rodrigo ◽  
María Dolores Escalera-Rodriguez ◽  
Joaquín Rams
Keyword(s):  
Wear Resistance ◽  
Magnesium Alloy ◽  
Corrosion Behavior ◽  
Laser Cladding ◽  
Wear Behavior ◽  
Composite Coatings ◽  
Aluminum Matrix ◽  
Aluminum Matrix Composites ◽  
Wear Rates ◽  
Pin On Disc

Aluminum matrix composites reinforced with SiC particles (SiCp) were deposited on ZE41 magnesium substrates by laser cladding in order to improve their tribological performance. Silicon and titanium were added to the matrix in order to avoid Al-SiC reactivity. The addition of these elements to avoid Al4C3 formation during the laser cladding fabrication was successfully explored in previous research, but the effect of these elements on the wear behavior and the corrosion resistance of these coatings has not been studied. During the fabrication process, there is dilution with the substrate that forms an Al-Mg matrix, which has an influence on the wear and corrosion behavior. Electrochemical polarization and impedance measurements in a 3.5% NaCl solution and the dry sliding conditions on a pin-on-disc tribometer were used to evaluate the different compositions of Al/SiCp coatings on the ZE41 magnesium alloy and uncoated ZE41. All of the composite coatings had lower wear rates than the substrate. However, the coatings showed worse corrosion behavior than the ZE41 substrate, although the addition of Si or Ti improves the corrosion behavior and the wear resistance.

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