Reactive Fabrication and Effect of NbC on Microstructure and Tribological Properties of CrS Co-Based Self-Lubricating Coatings by Laser Cladding

Fang, Liuyang; Yan, Hua; Yao, Yansong; Zhang, Peilei; Gao, Qian; Qin, Ying-zhi

doi:10.3390/ma11010044

Cited by 25 publications

(11 citation statements)

References 31 publications

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“…Based on the results of Point 3, white dot-like phases were enriched in Nb and C, which was identified as NbC formed during the solidification. 26…”

Section: Resultsmentioning

confidence: 99%

“…Based on the results of Point 3, white dot-like phases were enriched in Nb and C, which was identified as NbC formed during the solidification. 26 The microstructure evolution of the coating could be interpreted with the thermal conduction model. At the initial stage of the solidification process, the temperature gradient (G) between molten pool and substrate was huge and the crystallization rate (R) tended to be 0.…”

Section: Microstructure and Element Distribution Of Surfacing Coatingmentioning

confidence: 99%

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Microstructure and micro-hardness of Ni-based surfacing coating on the Cr12MoV die steel

Wei

Wang

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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Ni-based surfacing coating was fabricated on the Cr12MoV die steel utilizing the ENiCrFe-2 alloy. The defect-free surfacing coating was obtained with a good metallurgical bonding between the coating and the substrate. The microstructure, element distribution, and micro-hardness were analyzed. Results showed that the microstructure was composed of planar crystals at the bottom of coating, and it consisted of columnar crystals at the middle region. There existed a diffusion layer with a width of about 100 μm at the ENiCrFe-2–Cr12MoV interface. Three regions were formed in the heat-affected zone with various microstructure morphologies. The average micro-hardness of coating was 275 HV0.5, which was more than that of Cr12MoV. Micro-hardness was dramatically increased (765 HV0.5) in the middle of the heat-affected zone. This was caused by the combined effect of grain refinement, solid solution strengthening, second-phase strengthening, and primary carbide strengthening. Moreover, the formation mechanism of middle heat-affected zone was discussed in this paper in detail.

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“…Based on the results of Point 3, white dot-like phases were enriched in Nb and C, which was identified as NbC formed during the solidification. 26…”

Section: Resultsmentioning

confidence: 99%

Section: Microstructure and Element Distribution Of Surfacing Coatingmentioning

confidence: 99%

Microstructure and micro-hardness of Ni-based surfacing coating on the Cr12MoV die steel

Wei

Wang

2020

Proceedings of the Institution of Mechanical Engineers, Part L:

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“…The wear rate is calculated by the following equation [ 33 , 34 ]: W = V/(S × P) = Δm/(ρ × S × P) [mm 3 /N·m], where V is the worn volume, P is the normal load, S is the total sliding distance, △m is the wear loss, and ρ is the density of the 34CrNiMo6 steel. Figure 10 shows the wear rates of the three kinds of samples.…”

Section: Resultsmentioning

confidence: 99%

Microstructure and Tribological Properties of Laser Forming Repaired 34CrNiMo6 Steel

et al. 2018

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Laser forming repair (LFR) technology has considerable potential in high strength steel structure repair. 34CrNiMo6 steel has been widely used in high-value components, and it is imperative to repair these damaged components. In this study, two different thicknesses of repaired layers are deposited on the 34CrNiMo6 wrought substrate with five layers and 20 layers via LFR technology. The microstructure, phases, microhardness, and tribological properties are analyzed using optical microscopy, scanning electron microscopy, X-ray diffraction, Vickers hardness testing, and dry sliding wear testing. These results show that the 34CrNiMo6 repaired layers were successfully deposited on the substrate. The microstructure of the laser-repaired layers in the five-layer sample included bainite and retained austenite. For the 20-layer sample, the microstructure in the top of the repaired layers was still bainite and retained austenite, whereas that in the bottom of the repaired layers was transformed into ferrite and cementite. The average coefficients of friction of repaired layers is not significantly different from the substrate. The wear rate of the five LFR layers, 20-layer LFR, and substrate samples were 12.89 × 10−6, 15 × 10−6, and 23.87 × 10−6 mm3/N·m, respectively. The laser forming repaired samples had better wear resistance compared to the substrate. The wear mechanism of laser forming repaired samples is abrasive wear; whereas that of the substrate is abrasive wear and fatigue wear.

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“…Self-lubricating Ni-P-Ag-Al 2 O 3 , coating for instance, was studied by Alirezaei et al [90] in 2013. Researchers have focused on self-lubrication over the years for an idea to introduce solid lubricant [91][92][93][94][95][96][97]. In the study, high temperature information of the coating was introduced.…”

Section: Hybridmentioning

confidence: 99%

A Review: Thin Protective Coating for Wear Protection in High-Temperature Application

Awang

Khalili

Pedapati

2019

Metals

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Earning trust among high strength material industrialists for its sophistication, thin protective coating has gained its own maturity to date. As a result of active development in the industries, working tool has the capability of fabricating high strength materials with remarkable durability. For example, unwanted tool wear due to thermally softening problems can be avoided. Therefore, the solution for that is protecting the tool with a thin protective coating that can be coated by various coating deposition methods. With the thin protective coating itself possessing remarkable degree of chemical and mechanical properties, the combination of both makes the thin protective coating lead to a useful extend. This paper provides a review of various research activities and various developments in the wear prone industries. Researchers have explored a number of thin protective coatings for the last century to provide a valuable guide for a most practical option. With the state of the art development of the coating methods such as electrodepositing, radio frequency ion source implantation, electron beam implantation, plasma-sprayed coating deposition, flame-sprayed coating deposition, chemical catalytic reduction deposition, vacuum-diffused deposition, vapor deposition, chemical vapor deposition, physical vapor deposition, plasma arc deposition, and some others, this paper presents the continuous development on the enhancement of the capability of the working tool chronologically since the last century. Such development was studied in connection with the ability to outlast the performance of working tool, which elevates expectations that thin protective coatings are no longer extended far beyond.

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Reactive Fabrication and Effect of NbC on Microstructure and Tribological Properties of CrS Co-Based Self-Lubricating Coatings by Laser Cladding

Cited by 25 publications

References 31 publications

Microstructure and micro-hardness of Ni-based surfacing coating on the Cr12MoV die steel

Microstructure and micro-hardness of Ni-based surfacing coating on the Cr12MoV die steel

Microstructure and Tribological Properties of Laser Forming Repaired 34CrNiMo6 Steel

A Review: Thin Protective Coating for Wear Protection in High-Temperature Application

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