Effects of WC–Ni content on microstructure and wear resistance of laser cladding Ni-based alloys coating

Guo, Chun; Chen, Jianmin; Zhou, Jiansong; Zhao, Jiayang; Wang, Lingqian; Yu, You‐Jun; Zhou, Huaiying

doi:10.1016/j.surfcoat.2011.06.005

Cited by 178 publications

(53 citation statements)

References 26 publications

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“…Leech et al [12] observed that improved uniformity of tungsten carbide distribution in a Ni-WC based metal matrix composite resulted in very high resistance to wear. Guo et al [13] determined that wear resistant and hardness of Ni-WC coatings increased with tungsten carbide mass fraction increasing due to enhanced dissolution of carbon into the matrix. In order to optimize microstructure and improve quality of tungsten carbide coating the chemical composition of the coating should be adjusted.…”

mentioning

confidence: 99%

Elemental profiling of laser cladded multilayer coatings by laser induced breakdown spectroscopy and energy dispersive X-ray spectroscopy

Lednev

Sdvizhenskii

Филиппов

et al. 2017

Applied Surface Science

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mentioning

confidence: 99%

Elemental profiling of laser cladded multilayer coatings by laser induced breakdown spectroscopy and energy dispersive X-ray spectroscopy

Lednev

Sdvizhenskii

Филиппов

et al. 2017

Applied Surface Science

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“…The frequently applied highly resistant materials used for cladding processes consist of WC/Co, WC/Ni, WC/Stellite, WC/W 2 C and WC/NiCr powder mixtures [7][8][9][10]. The participation of tungsten carbide (WC) particles in the manufactured clads causes mainly the improvement of its hardness, wear resistance and toughness.…”

Section: Introductionmentioning

confidence: 99%

The study on minimum uncut chip thickness and cutting forces during laser-assisted turning of WC/NiCr clad layers

Przestacki

Chwalczuk

Wojciechowski

2017

Int J Adv Manuf Technol

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Laser cladding technology enables the regeneration or manufacturing of machine parts with the improved surface layer properties. The materials applied during the laser cladding processes very often contain hard and wear-resistant tungsten carbide (WC) particles. However, the parts obtained after the laser cladding have usually unsatisfactory surface quality and thus require post-process finishing. In addition, the content of WC particles causes that clad layers are difficult to cut. Therefore, in order to improve their machinability, the laser-assisted machining (LAM) technology can be applied. Nevertheless, the material removal mechanisms during LAM of WC/NiCr clad layers are not recognized. Thus, this study is focused on the estimation of minimum uncut chip thickness and analysis of cutting forces which are important factors describing the chip decohesion process. The proposed method is based on the novel approach dedicated directly to the oblique cutting, considering the zeroth tangential force increment located onto rounded cutting edge. The experimental procedure involves cutting force component (F c , F f , F p ) measurements in the range of variable cutting conditions, as well as the cutting tool's micro-geometry inspection. On the basis of the measurements carried out, the force regression equations are formulated and subsequently applied to the determination of tangential force expression. Subsequently, the minimum uncut chip thickness is calculated on the basis of the equation derived from the zero tangential force increment condition and presented in function of cutting speed. The obtained results enable the effective selection of the cutting parameters during LAM of WC/NiCr clad layers.

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“…The effective methods to solve this problem are the use of special coatings that combine the variety of surface layers applied for a particular surface modification, i.e., increasing hardness, changing the coefficient of friction (in either direction), increasing wear resistance, giving any other special properties. One of the most promising methods of applying hardening coatings is laser surfacing using alloying (modifying) elements, as indicated by a large number of scientific papers in this field [1][2][3][4][5][6][7][8][9][10][11]. Despite some drawbacks to this method (relatively high cost of equipment and its operation, insufficient knowledge of processes characterizing the interaction of laser radiation with matter, etc.…”

Section: Introductionmentioning

confidence: 99%

Influence of nanomodification additives on the properties of multilayer composite coating obtained in laser surfacing

Черепанов

Orishich

Овчаренко

et al. 2017

AIP Conference Proceedings

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Abstract. The paper presents the results of numerical and experimental studies of the process of obtaining a permanent joint of two plates of heterogeneous metals that cannot be welded in the usual way: alloy Grade 4 and steel AISI 321 using a laser beam and an intermediate composite insert. The composite insert was obtained by explosion welding of four thin plates of titanium (Grade 4), niobium, copper, and steel (AISI 321). The insert was placed between the welded plates of titanium and steel, and the steel plate was welded with the steel part of the insert, and the titanium plate was welded with the titanium part of the insert. The plates were welded using a CO2 laser. The connection of metals with the help of explosion is carried out without their melting, so the formation of the brittle intermetallics does not occur in most cases. This ensures the greatest strength of the joints as compared to the joints obtained by other welding methods. To analyze the distribution of thermal fields in the composite insert and welded plates, a numerical study was conducted of the laser welding of steel and titanium plates with the corresponding parts of the insert. The purpose of the study was to determine the rational parameters of welding (laser beam power, speed of its movement, size and position of the focal spot), at which there was no complete melting of the steel and titanium parts of the insert during through penetration of the welded plates. The experimental part of the work is devoted to analysis of formation of the internal boundaries and microstructure of the composite insert and the strength of the permanent joint. It is shown that as a result of the explosion welding, weld seams of different wavelike configuration are formed. The most pronounced wavelike boundary is observed in the steel-copper connection, since these materials have a face-centered cubic lattice and are easily subjected to plastic deformation. At the contact boundaries of the plates, transition diffusion zones with different widths (from 5 to ment concentrations are formed. The hardness in the boundary diffusion zones is higher than in the connected metals, which is due to the diffusion interaction of the materials adjacent to each other. It has been established that the tensile strength of the composite insert is comparable to the maximum strength of Grade 4 alloy (456-511 MPa), and the failure in most cases occurred over the least durable component of the composite material, which is the copper plate, whose strength was significantly increased by cold hardening during explosion welding and diffusion of elements of the contacting plates. INTRODUCTIONReliability and durability of parts and mechanisms are largely determined by the properties of their surface layers, the operating conditions of which differ significantly from the conditions of operation of the rest of the 020017-1 product. For example, while the bulk determines the total strength, which depends on the properties of the metal and its cross-section, the surface layers in most cas...

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Effects of WC–Ni content on microstructure and wear resistance of laser cladding Ni-based alloys coating

Cited by 178 publications

References 26 publications

Elemental profiling of laser cladded multilayer coatings by laser induced breakdown spectroscopy and energy dispersive X-ray spectroscopy

Elemental profiling of laser cladded multilayer coatings by laser induced breakdown spectroscopy and energy dispersive X-ray spectroscopy

The study on minimum uncut chip thickness and cutting forces during laser-assisted turning of WC/NiCr clad layers

Influence of nanomodification additives on the properties of multilayer composite coating obtained in laser surfacing

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