Microstructure and wear resistance enhancement of cast steel rolls by laser surface alloying NiCr–Cr3C2

Sun, Guifang; Zhang, Yongkang; Liu, Changsheng; Luo, Kaiyu; Tao, Xingqi; Li, Peng

doi:10.1016/j.matdes.2010.01.021

Cited by 78 publications

(35 citation statements)

References 34 publications

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“…With the increase of the scanning speed, the cooling rate of the molten pool increased. The grain sized became smaller with increasing scanning speed, which is also a result of the increasing of cooling rate as reported by Sun et al [38].…”

Section: Potentiodynamic Polarization Test Resultssupporting

confidence: 75%

See 1 more Smart Citation

Characterization and Corrosion Behaviour of Zn-Sn Binary Alloy Coatings in 0.5 M H₂SO₄Solution

Fatoba¹,

Popoola²,

Fedotova³

2015

Journal of Electrochemical Science and Technology

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This work examines the characterization and corrosion behaviour of laser alloyed UNSG10150 steel with three different premixed composition Zn-Sn binary powders using a 4.4 kW continuous wave (CW) Rofin Sinar Nd:YAG laser processing system. The steel alloyed samples were cut to corrosion coupons, immersed in sulphuric acid (0.5 M H 2 SO 4 ) solution at 30 o C using electrochemical technique and investigated for its corrosion behaviour. The morphologies and microstructures of the developed coated and uncoated samples were characterized by Optic Nikon Optical microscope (OPM) and scanning electron microscope (SEM/EDS). Moreover, X-ray diffractometer (XRD) was used to identify the phases present. An enhancement of 2.7-times the hardness of the steel substrate was achieved in sample A 1 which may be attributed to the fine microstructure, dislocations and the high degree of saturation of solid solution brought by the high scanning speed. At scanning speed of 0.8 m/min, sample A 1 exhibited the highest polarization resistance R p (1081678 Ω cm ) is 67,813-times the polarization of the UNSG10150 substrate and 99.9972% reduction in the corrosion rate.

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Section: Potentiodynamic Polarization Test Resultssupporting

confidence: 75%

“…The hardness of the coatings also increased with increased scanning speed, which may be attributed to the fine microstructure, dislocations and the high degree of saturation of solid solution brought by the high scanning speed as reported by Sun et al [38].…”

Section: Microhardness Resultssupporting

confidence: 60%

Characterization and Corrosion Behaviour of Zn-Sn Binary Alloy Coatings in 0.5 M H₂SO₄Solution

Fatoba¹,

Popoola²,

Fedotova³

2015

Journal of Electrochemical Science and Technology

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“…Coatings deposited by the HVOF process exhibit high density, low porosity, excellent adhesive strength with much more carbide particles retained in the matrix compared with those deposited by plasma spraying process. It has been reported that HVOF-sprayed Cr 3 C 2 -NiCr coatings exhibit good wear resistance and corrosion resistance in various high-temperature environments [6][7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings

et al. 2017

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Abstract:In this work, the Cr 3 C 2 -25% NiCr powder was deposited on stainless steel with different combustion pressures and powder feed rates using HVOF technique. The microstructure, porosity, micro-hardness, indentation fracture toughness, adhesion strength, and wear resistance at 500 • C of the coatings were investigated. The results showed that HVOF sprayed Cr 3 C 2 -25% NiCr coatings possessed low porosity, high micro-hardness, and enough adhesion strength. The powder feed rate had obvious effect on porosity, micro-hardness and indention fracture toughness of the coatings, and the coating sprayed under the powder feed rate of 33.5 g/min possessed the optimal performance. The wear tests illustrated that the HVOF sprayed Cr 3 C 2 -25NiCr coating possessed good wear resistance at the temperature of 500 • C, in which the coating sprayed at the powder feed rate of 33.5 g/min had the best wear resistance due to its dense structure and enough fracture toughness.

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“…The traditional surface modification techniques, such as spraying, electroplating and chemical heat treatment, are not very satisfactory because either the bonding of coating and substrate is poor or the thickness of the coating is too thin [10][11][12][13][14][15] . The laser cladding and the plasma cladding overcome the shortcomings of the traditional surface modification and have been subjected to rapid development in recent years.…”

Section: Introductionmentioning

confidence: 99%

Microstructure and thermal physical parameters of Ni60-Cr3C2 composite coating by laser cladding

Pan

Wang

et al. 2010

J. Wuhan Univ. Technol.-Mat. Sci. Edit.

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To satisfy performance and long life requirements for hot forging die, Ni60-Cr 3 C 2 composite coatings were prepared on the high-speed steel W 6 Mo 5 Cr 4 V 2 using laser cladding technology. Laser clad coatings with different ratios of Ni60:Cr 3 C 2 were investigated by scanning electron microscopy (SEM), X-ray diffraction (XRD), energy-dispersive X-ray analysis (EDX) and microhardness tester, respectively. Specific heat capacity and thermal conductivity were measured by Laser Thermal Constant Meter. Thermal expansion coefficient and elastic modulus were measured by Dynamic Mechanical Thermal Analyzer and Electro-Hydraulic Servocontrolled Testing System, respectively. The results indicated that Ni60＋50wt% Cr 3 C 2 composite coating had dense and homogeneous structure, as well as a metallurgical bonding with the substrate. With the increase of Cr 3 C 2 content, volume of chromium-containing compounds in the composite coating increased, microhardness increased and microstructure refined. The thermal physical parameters results showed that Ni60＋ 50wt% Cr 3 C 2 composite coating was overall worse than W 6 Mo 5 Cr 4 V 2 , but had a higher hot yield strength to alleviate hot fatigue and surface hot wear of hot forging die during hot forging and thus improve the service life of hot forging die.

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Microstructure and wear resistance enhancement of cast steel rolls by laser surface alloying NiCr–Cr3C2

Cited by 78 publications

References 34 publications

Characterization and Corrosion Behaviour of Zn-Sn Binary Alloy Coatings in 0.5 M H₂SO₄Solution

Characterization and Corrosion Behaviour of Zn-Sn Binary Alloy Coatings in 0.5 M H₂SO₄Solution

Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings

Microstructure and thermal physical parameters of Ni60-Cr3C2 composite coating by laser cladding

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Microstructure and wear resistance enhancement of cast steel rolls by laser surface alloying NiCr–Cr3C2

Cited by 78 publications

References 34 publications

Characterization and Corrosion Behaviour of Zn-Sn Binary Alloy Coatings in 0.5 M H2SO4Solution

Characterization and Corrosion Behaviour of Zn-Sn Binary Alloy Coatings in 0.5 M H2SO4Solution

Influence of Process Parameters on High Velocity Oxy-Fuel Sprayed Cr3C2-25%NiCr Coatings

Microstructure and thermal physical parameters of Ni60-Cr3C2 composite coating by laser cladding

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Characterization and Corrosion Behaviour of Zn-Sn Binary Alloy Coatings in 0.5 M H₂SO₄Solution

Characterization and Corrosion Behaviour of Zn-Sn Binary Alloy Coatings in 0.5 M H₂SO₄Solution