Laser cladding composite coatings by Ni–Cr–Ti–B
            <sub>4</sub>
            C with different process parameters

Han, Tengfei; Xiao, Meng; Zhang, Ying; Shen, Yifu

doi:10.1080/10426914.2019.1605172

Cited by 20 publications

(7 citation statements)

References 29 publications

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“…The higher substrate dilution in the infiltrated layer of 5 V can be confirmed by EDS line scan analysis (Figure 6(c)) performed on the cross section of Figure 5(b,c). According to Figure 6(c) concentration of Fe in a total length of the coating is higher for infiltrated layer of 5 V. Dilution rate of the substrate should be controlled by changing applied EPD voltage, since too much dilution adversely affect the mechanical properties of the coating [19].…”

Section: Resultsmentioning

confidence: 99%

Combination of electrophoretic and electroless depositions to fabricate Ni/TiC cladding

Gorji

Sanjabi

Edtmaier

2019

Surface Engineering

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A novel method is established that improves the shortcoming of embedding low volume fraction of reinforcements in Ni-P electroless coating. Experimental design of the present study is based on 5 steps: (1) electrophoretic deposition (EPD) of titanium carbide core inside the Ni-P shell particles (2) pre-sintering of as-EPD layer (3) electroless deposition of Ni-P top layer on as-EPD layer (4) heating the multilayer structure and (5) infiltration of the Ni-P melt phase through porous EPD layer. Anchoring TiC particles inside a Ni-P shell was done for catalyzing electroless Ni-P deposition on as-EPD layer and improving the high-temperature wettability of the EPD layer. By infiltration sintering on EPD layer (20 V for 2 min) a composite coating of Ni-P/TiC with a volume fraction of ∼49% TiC was successfully produced. According to wear test results, embedding TiC into Ni-P significantly increases hardness (972-1460 VHN) and reduces friction coefficient (0.45-0.23).

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Section: Resultsmentioning

confidence: 99%

Combination of electrophoretic and electroless depositions to fabricate Ni/TiC cladding

Gorji

Sanjabi

Edtmaier

2019

Surface Engineering

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“…Our analysis of the scientific literature reveals that the main issue in the formation of coatings based on iron strengthened by Mo x B y in the form of separated inclusions, similar to TiB 2 [6][7][8][9], is the interaction within the Fe-Mo x-B y system. Its result is the formation of a FeMo 2 B 2 phase, which is part of the eutectics with iron, thereby forming a structure that is not optimal in terms of wear resistance, compared to composite [11][12][13].…”

Section: Literature Review and Problem Statementmentioning

confidence: 94%

“…The hardness of the titanium alloy after such treatment increases by almost 2 times. TiB 2 and TiС, synthesized in situ, were also found at the laser cladding of coatings from a mixture of Ni, Cr, Ti powders and B 4 C. The coating has a distinct heterophase structure and a microhardness of ~12 GPa [7]. The similar character of the formation of titanium compounds is also observed at the electric arc deposition of coatings by a non-fusible (tungsten) electrode of the preliminary applied Ti and B 4 C mixtures with a different component ratio (5:1, 3:1, and 3:2) [8].…”

Section: Literature Review and Problem Statementmentioning

confidence: 96%

In situ formation of molybdenum borides at hardfacing by arc welding with flux-cored wires containing a reaction mixture of B4C/Mo

Prysyazhnyuk¹,

Shlapak²,

Ivanov³

et al. 2020

EEJET

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This paper reports a study into the formation of the phase composition, structure, and properties of arc welding coatings by the flux-cored electrode materials from the Fe-MoB -C system. The welding alloys were applied using the flux-cored arc welding (FCAW) electrodes, which consisted of a shell made from the low-carbon steel filled with a reaction powder mixture that contained boron carbide and molybdenum in a ratio of 1:1. The calculation of the phase composition of alloys that correspond to the surfaced layers by a CALPHAD method using the Thermo-Calc OpenCalphad software shows that under the equilibrium conditions the boride phases of molybdenum and ferrite cannot co-exist. The main phase of such alloys is a FeMo 2 B 2 compound, which forms the eutectics with austenite. Given that the eutectic structures with borides are characterized by high brittleness, the introduction of components was conducted in the form of a reaction mixture in order to obtain the in situ formed boride phases in the form of separate structural components. Analysis of the results of studying the microstructure and phase composition of coatings reveals that they consist of three main structural components: the eutectic (FeMo 2 B 2 +ferrite) and the grains of molybdenum tetraboride MoB 4. Thus, under the conditions of arc welding using the reaction mixture, an irregular structure is formed, which is favorable in terms of ensuring wear resistance due to the high microhardness of MoB 4 >27 GPa. The hardness of the coatings obtained is at the level of 63-65 HRC, and the wear resistance is higher compared to standard high-chromium alloys (grades Т620 and Т590) by 2-2.5 times. This makes it possible to recommend the coating of a given system for hardfacing the working surfaces of equipment in the coal, processing, woodworking industries, etc., where abrasive wear is the dominant type of surface wear

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“…The coatings fabricated by laser cladding are provided with finer microstructure, controlled dilution rate, excellent metallurgical bonding with substrate [6]. Therefore, laser cladding is a competitive candidate technology to improve the wear resistance of mild steel, consequently, improving its usability.The ceramic reinforced composite coating, manufactured by laser cladding, not only has favourable bonding ability with the substrate, but also grasps high hardness and superior wear resistance, which benefits from ceramic reinforced particles (CRPs) [7]. Thus it can be seen that the wear resistance of the composite coating is closely related to the CRPs.…”

mentioning

confidence: 99%

“…The ceramic reinforced composite coating, manufactured by laser cladding, not only has favourable bonding ability with the substrate, but also grasps high hardness and superior wear resistance, which benefits from ceramic reinforced particles (CRPs) [7]. Thus it can be seen that the wear resistance of the composite coating is closely related to the CRPs.…”

mentioning

confidence: 99%

Effects of process parameters and carbon nanotubes content on microstructure and properties of laser cladding composite coatings using Ni-Ti-Cr-carbon nanotubes

Zhou

Shen

2022

Mater. Res. Express

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The Ni-Ti-Cr-carbon nanotubes (CNTs) composite coatings was successfully fabricated by laser cladding. The optical microscope was used to observe the metallographic structure of the composite coating, the phase composition of the composite layer was detected by XRD, the microstructures of the composite coatings were observed by SEM, and the point distribution and line distribution of elements were analyzed by EDS. With the increase of laser specific energy (Es) and CNTs content, the TiC enhanced particles in the composite coatings evolves into coarse dendrites. Compared with the mild steel substrate, the microhardness and wear resistance of the composite coatings are obviously improved. The maximum microhardness obtained by the composite coating is approximately 5 times that of the mild steel substrate. The increase of Es and the excessive content of CNTs will reduce the microhardness and wear resistance of the composite coatings. The in situ synthesis of TiC particles not only enhance the microhardness of the composite coatings, but also improve the wear resistance of the coatings.

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Laser cladding composite coatings by Ni–Cr–Ti–B ₄ C with different process parameters

Cited by 20 publications

References 29 publications

Combination of electrophoretic and electroless depositions to fabricate Ni/TiC cladding

Combination of electrophoretic and electroless depositions to fabricate Ni/TiC cladding

In situ formation of molybdenum borides at hardfacing by arc welding with flux-cored wires containing a reaction mixture of B4C/Mo

Effects of process parameters and carbon nanotubes content on microstructure and properties of laser cladding composite coatings using Ni-Ti-Cr-carbon nanotubes

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Laser cladding composite coatings by Ni–Cr–Ti–B 4 C with different process parameters

Cited by 20 publications

References 29 publications

Combination of electrophoretic and electroless depositions to fabricate Ni/TiC cladding

Combination of electrophoretic and electroless depositions to fabricate Ni/TiC cladding

In situ formation of molybdenum borides at hardfacing by arc welding with flux-cored wires containing a reaction mixture of B4C/Mo

Effects of process parameters and carbon nanotubes content on microstructure and properties of laser cladding composite coatings using Ni-Ti-Cr-carbon nanotubes

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Laser cladding composite coatings by Ni–Cr–Ti–B ₄ C with different process parameters