Microstructure, microhardness and corrosion resistance of NiCrBSi coatings under electromagnetic field auxiliary laser cladding

Zhai, Lulu; Ban, Chunyan; Zhang, J.W.

doi:10.1016/j.surfcoat.2018.11.034

Cited by 65 publications

(8 citation statements)

References 19 publications

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“…The comparison of microhardness distribution performed with or without magnetic field clearly illustrates that the microhardness values consistently exhibit higher trends across different excitation currents under both magnetic configurations, exceeding those obtained without the application of a magnetic field. This can be explained by the alteration in the solidification rate induced by the magnetic fields, leading to improved uniformity and grain size refinement in the fusion zone microstructure, thereby influencing the microhardness [8, [19][20][21].…”

Section: Influence Of External Transverse Magnetic Fields On Microhar...mentioning

confidence: 99%

Characterisation of weld bead and microhardness of SS316L weld overlays on S355J2+N steel using GTAW under E-type magnet

Raj,

Gill

2023

Eng. Res. Express

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In this study, a three-pole (E-type) electromagnet with magnetic configurations north-south-north (NSN) and south-north-south (SNS) was installed in the GTAW process to generate a combination of two symmetrically transverse external magnetic fields around the weld arc and the molten pool. The effects of magnetic fields obtained by these two types of magnetic configurations (NSN and SNS) on the weld bead characteristics and microhardness in GTAW were analysed. In these experiments, high-strength low alloy (HSLA) S355J2+N grade with a thickness of 10 mm was selected as the substrate material and S316L as the filler wire. Using magnetic fields during the welding process successfully enhanced the weld bead appearance and shape and improved the mechanical characteristics of weld overlays. It was also observed that for different values of excitation current, magnetic fields generated with both configurations ( i.e., NSN and SNS) provide greater bead width, a higher penetration shape factor, and higher microhardness values in comparison to specimens welded with conventional GTAW. The NSN and SNS configurations of the E-type magnet improve the penetration shape factor by 58% and 46%, respectively. These configurations were more suitable for weld overlays (cladding) and hardfacing. However, the observations indicated an enhancement in microhardness for all excitation current values by employing the NSN and SNS magnetic configurations.

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Section: Influence Of External Transverse Magnetic Fields On Microhar...mentioning

confidence: 99%

Characterisation of weld bead and microhardness of SS316L weld overlays on S355J2+N steel using GTAW under E-type magnet

Raj,

Gill

2023

Eng. Res. Express

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“…The reduction of micro-inhomogeneity inhibits local corrosion of materials [24]. The increase of CrB content leads to the increase of corrosion resistance, and Cr element is conducive to improving the electrode potential of the coating and making the coating have good corrosion resistance [25]. The Bode curve shown in Figure 14 consists of low, medium and high frequency regions.…”

Section: Friction and Wear Performance Testmentioning

confidence: 99%

Experimental Study of Laser Cladding Ni-Based Coating Based on Response Surface Method

Long

Shi

et al. 2023

Coatings

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In order to extend the service life of 45# steel and reduce production costs, coating NiCrBSi alloy powder on the surface of 45# steel can meet production requirements, avoid resource waste and achieve green manufacturing. Based on response surface method (RSM), the dilution rate, aspect ratio and contact angle were taken as the optimization goals, and the process parameters (laser power, scanning speed and powder feeding rate) were optimized and the optimal process parameters were determined. On this basis, the microstructure of Ni-based coating was characterized by the cladding experiment. The friction wear and corrosion resistance of the coating were tested, and the enhancement mechanism of the wear resistance and corrosion resistance of the coating was analyzed. The results show that the optimized coating has good corrosion resistance and wear resistance. It provides a reference for the optimization of process parameters in 45# steel repair work.

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“…After long observation, it was found a huge improvement in wear resistance of immiscible coating samples just because of higher hardness rich Fe particles. L.L Zhai, C.Y Ban and J. W Zhang (24) to demonstrate the outcome of magnetic field on different mechanical properties under auxiliary laser cladding of NiCrBSi coatings, has prepared a sample by using Ni60AA powder with a particle size of cladding powder 37-90 µm and found that at 500A, at the bottommost of cladding coating crack has been observed during experimentation and, at the topmost and middle of the coating white and bright particles were dispersed, dilution rate change was observed under electromagnetic auxiliary cladding and average hardness of the coating has been remarkably enhanced under steady magnetic field which was reported (876 HV0.2). L.Zhu,Y.…”

Section: Ecs Transactions 107 (1) 5047-5057 (2022)mentioning

confidence: 99%

The Effects of Laser Cladding Surface Treatment on Surface Degradation Properties :a Review

Singh¹,

Goyal²,

Kumar³

2022

ECS Trans.

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Surface degradation due to hot corrosion and erosion in thermal power plants and gas turbines, is one of the primary concerns for many researchers, scientists and surface engineers. Hot corrosion is considered as a serious problem in coal-based thermal power plants which fulfill approximately 58.3% of the total electricity demand of India. The practice of using low-grade fuels at high functional temperatures is the overriding reason for accelerated hot corrosion. A case study stated that approximately 56% of boiler failures occur due to hot corrosion that may lead to reduced economical efficiency of the thermal power plants. Fortunately, this problem can be controlled by some preventive measures, and surface modification is one of the effective methods to enhance the lifespan of boiler components. Surface modification can be done through different surface coating processes like plasma spray, HVOF and D-gun etc. In this paper, we will discuss the effects of Laser cladding surface coating process to develop the corrosion resistance surface properties of different substrate materials

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Microstructure, microhardness and corrosion resistance of NiCrBSi coatings under electromagnetic field auxiliary laser cladding

Cited by 65 publications

References 19 publications

Characterisation of weld bead and microhardness of SS316L weld overlays on S355J2+N steel using GTAW under E-type magnet

Characterisation of weld bead and microhardness of SS316L weld overlays on S355J2+N steel using GTAW under E-type magnet

Experimental Study of Laser Cladding Ni-Based Coating Based on Response Surface Method

The Effects of Laser Cladding Surface Treatment on Surface Degradation Properties :a Review

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