High-speed laser cladding of chromium carbide reinforced Ni-based coatings

Tuominen, Jari; Kiviö, Jouko; Balusson, Clara; Raami, Lassi; Vihinen, Jorma; Peura, Pasi

doi:10.1007/s40194-023-01557-9

Cited by 4 publications

(2 citation statements)

References 35 publications

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“…The service life and efficiency of wearing metal parts are improved by forming a protective coating of the proper metallurgy during hardfacing [20][21][22]. Laser cladding technology is a recently developed surface coating method for improving the wear resistance of alloys [23][24][25][26][27]. The laser beam melts the powder material on the surface to form a fully dense, metallurgically bonded coating [28].…”

Section: Introductionmentioning

confidence: 99%

Abrasive Wear Properties of Wear-Resistant Coating on Bucket Teeth Assessed Using a Dry Sand Rubber Wheel Tester

Wang,

Sun,

Wang

et al. 2024

Materials

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Ni60-WC coatings with different WC contents on the bucket tooth substrates were pre- pared using laser cladding technology. Their abrasive wear properties were assessed using the dry sand rubber wheel test system. The substrate and the hard-facing layer were tested for comparison. The results showed that the hardness of the Ni60-WC coatings increased with the increase in WC content. The wear resistance of the bucket tooth substrate was greatly improved by hard-facing and laser cladding Ni60-WC coatings. The wear rate of the hard-facing layer was reduced to 1/6 of that of the tooth substrate. The wear rate of the laser cladding coatings with 20–40 wt.% WC was similar to that of the hard-facing layer. It is worth mentioning that the wear rate of the coatings with 60–80 wt.% WC was only 1/4 of that of the hard-facing layer. Micro-cutting with surface plastic deformation was the main wear mechanism of the substrate to form narrow and deep furrows. The wear mechanism of the hard-facing layer was mainly plastic deformation with a wide groove, and the surface cracks promoted the removal of the material. The removal of the binder phase caused by micro-cutting was the main wear mechanism of the laser cladding Ni60-WC coatings. However, the hard phase of WC hinders micro-cutting and plastic deformation, which improves the wear resistance of the coating.

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Section: Introductionmentioning

confidence: 99%

Abrasive Wear Properties of Wear-Resistant Coating on Bucket Teeth Assessed Using a Dry Sand Rubber Wheel Tester

Wang,

Sun,

Wang

et al. 2024

Materials

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“…Laser cladding, particularly at higher speeds, is popular in additive manufacturing [4][5][6][7]. Comprehensive studies have been carried out on the surface modification of various materials using laser alloying, for example, on cast irons [8][9][10], steels [11,12], non-ferrous metals [13][14][15], and alloys [16][17][18].…”

Section: Introductionmentioning

confidence: 99%

Properties of Laser-Alloyed Stainless Steel Coatings on the Surface of Gray Cast Iron Discs

Wang,

Hao,

Zhou

et al. 2024

Lubricants

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The influence of laser-alloyed stainless steel coatings on the properties of the surfaces of cast iron discs, such as friction-induced vibration and noise, friction coefficient, residual stress, hardness, and corrosion resistance, was investigated in this study. The experimental results show that after laser alloying, the surface hardness of the cast iron discs increased significantly. The residual stresses on the surfaces of the laser-alloyed discs changed from tensile to compressive residual stresses, while any compressive residual stresses increased by more than six times. Most of the laser-alloyed discs demonstrated better performance in friction-induced vibration and noise damping and friction reduction. Metallographic observation and XRD (X-ray diffraction) analysis results show that the laser-alloyed layer is mainly a mixture of acicular martensite and dendritic material, while the phase composition of laser-treated discs is mainly martensitic, [Fe, Ni], Fe3Si, Cr23C6, and austenite, which plays a significant role in the improvement of the properties of the laser-alloyed cast iron in physics, tribology and corrosion resistance. This research has significance for the laser surface treatment of various cast irons and steels, which is an increasingly important manufacturing technology in the vehicle friction brake industry.

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Laser-based directed energy deposition and characterisation of cBN-reinforced NiAl-based coatings

Müller,

Gerdt,

Schrüfer

et al. 2024

Int J Adv Manuf Technol

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Within this study, the alloy NiAl–2.5Ta–7.5Cr is investigated as a new matrix material for cBN-reinforced abrasive turbine blade tip coatings as currently used NiCoCrAlY matrix alloys suffer from insufficient strength at the high operating temperatures. Laser-based directed energy deposition with blown powder was applied to produce cBN reinforced NiAl-based coatings on monocrystalline CMSX-4 substrates. For this, powdery titanium-coated cBN and NiAl–2.5Ta–7.5Cr material were co-injected into the process zone to achieve an in situ formation of a NiAl–2.5Ta–7.5Cr/cBN composite. In order to overcome challenges such as cracking susceptibility, inductive preheating of the substrate up to 800 °C was used. Optical and scanning electron microscopy, energy dispersive X-ray spectroscopy, as well as electron backscatter diffraction were applied to analyse the fabricated samples’ microstructure. Additionally, the mechanical properties were evaluated by means of microhardness mappings. This work demonstrates the feasibility of in situ forming a metal matrix composite with a homogeneous distribution of cBN particles. The results show the beneficial effect of high-temperature preheating on the crack formation. However, the study also reveals challenges such as cracking induced by the injected cBN particles as well as severe intermixing of substrate and coating, which yields spatially resolved deviations in the chemical composition and resulting variations in microstructure and hardness. Graphical abstract

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High-speed laser cladding of chromium carbide reinforced Ni-based coatings

Cited by 4 publications

References 35 publications

Abrasive Wear Properties of Wear-Resistant Coating on Bucket Teeth Assessed Using a Dry Sand Rubber Wheel Tester

Abrasive Wear Properties of Wear-Resistant Coating on Bucket Teeth Assessed Using a Dry Sand Rubber Wheel Tester

Properties of Laser-Alloyed Stainless Steel Coatings on the Surface of Gray Cast Iron Discs

Laser-based directed energy deposition and characterisation of cBN-reinforced NiAl-based coatings

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