Experimental and numerical analyses of geometrical and microstructural features of Tribaloy T-800 composite coating deposited via laser cladding-assisted with pre-heat (LCAP) process

Nyadongo, Sipiwe Trinity; Olakanmi, Eyitayo Olatunde; Pityana, Sisa

doi:10.1016/j.jmapro.2021.07.043

Cited by 17 publications

(4 citation statements)

References 42 publications

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“…Self-fusible alloy powder is an alloy powder with various alloying elements (such as Si and B.) added to Ni, Fe, CO, and other matrix alloys [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Microstructure and Properties of Q235 Steel by Iron-Based Laser Cladding Coating

Tang

et al. 2022

Advances in Materials Science and Engineering

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Laser cladding is a repair and surface-strengthening technology for the protection of metal parts. It is an effective method for improving the properties of various metal substrates. The process involves melting and solidifying alloy powder on the surface of the substrate. The aim of the present study was to explore the effect of iron-based alloy laser cladding coating on Q235 substrate. Three types of specimens were obtained from Q235 base material using a 5 kW cross-flow CO2 laser beam. Sample 1 and sample 2 were obtained by the addition of rosin to the iron-based alloy powder. Sample 3 was obtained through the addition of rosin and vanadium to the iron-based alloy powder. A gas curtain was used to wrap the molten pool of samples 2 and 3. The surface hardness of the specimens was determined using a Rockwell hardness tester, and the tensile strength was evaluated using the universal mechanical testing machine. The microstructure of the cladding coating was explored using an Olympus optical microscope and SEM. The results showed that the average hardness of sample 2 and sample 3 was 6.42% and 19.84% higher than that of sample 1. The average tensile strength of samples 2 and 3 was 7.42% and 10.37% higher than that of sample 1. The grain of sample 3 was finer than that of sample 2, and that of sample 2 was finer than that of sample 1 under the same magnification. Rosin minimized oxidation of the substrate, whereas the gas curtain prevented the entry of air into the molten pool, hence the improved properties of samples 2 and 3 compared with that of sample 1. Rosin and the gas curtain protected the powder from oxidation loss and improved the quality of the cladding coating. The results of the present study show that rosin reduced the oxidation of iron-based powder, whereas vanadium improved the hardness and strength of the substrate as well as refined the grain size.

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“…Self-fusible alloy powder is an alloy powder with various alloying elements (such as Si and B.) added to Ni, Fe, CO, and other matrix alloys [4][5][6][7][8].…”

Section: Introductionmentioning

confidence: 99%

Improvement of Microstructure and Properties of Q235 Steel by Iron-Based Laser Cladding Coating

Tang

et al. 2022

Advances in Materials Science and Engineering

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“…Both laser energy density and preheating temperature tend to increase the absorption of laser light by the substrate, increase the temperature of the molten pool, and promote the Marangoni convection effect in the molten pool [38,39]. Since the transient melt pool of the fusion coating is in the liquid state, the increase in dilution rate is further explained by combining the equation of the dynamic viscosity of the liquid and the equation of the laser absorption rate as shown in Equations ( 17) and ( 18) [30,40].…”

Section: Dilution Ratiomentioning

confidence: 99%

“…To further expand the research on the preparation of coatings assisted by applied physical fields, a new process of magneto-thermal-assisted fusion cladding of nickelbased self-lubricating coatings is proposed in this study. However, the magnetic-thermalassisted process introduced increases the complexity of the coupling effect of the cladding parameters, and the multi-objective optimization of the process is an effective way to solve this problem, which can provide important theoretical guidance for the preparation of high-quality self-lubricating coatings by the multi-physical field-assisted cladding [30,31].…”

Section: Introductionmentioning

confidence: 99%

Co-Optimization of the Preparation Process of Ni-Based Self-Lubricating Coatings by Magneto-Thermal-Assisted Laser Cladding

Gong,

Shu,

Zhang

et al. 2023

Coatings

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To reduce the metallurgical defects that are prone to occur in the preparation of nickel-based self-lubricating coatings, a method of process co-optimization for magneto-thermal-assisted laser cladding of nickel-based self-lubricating coatings is proposed in this paper. The laser energy density, preheating temperature, and electromagnetic intensity are selected as input factors; the prediction models of coating dilution rate, porosity and microhardness are established by the CCD test method; the interactive effects of the magnetic-thermal-assisted cladding process on the coating response are analyzed, and the optimal process parameter combinations are obtained by using the optimization method of MOPSO-AE-TOPSIS. Finally, the coatings under the parameters are successfully prepared. The results show that the optimal process parameter combinations obtained are laser energy density of 56.8 J/mm2, preheating temperature of 350 °C, electromagnetic intensity of 49.1 mT, and the error of the experimental results with this parameter is less than 3% from the algorithm optimization results. When the microstructure of unassisted and magneto-thermal-assisted fields are analyzed by comparison, it is found that the tissues are more homogeneous and finer, and the distribution of graphite is more homogeneous, which proves the effectiveness of the optimization method.

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“…Therefore, the second-order response surface model was used for fitting. The model is as follows: (Equation ( 1)) [19][20][21].…”

Section: Experimental Scheme Designmentioning

confidence: 99%

Multi-Objective Optimization of Process Parameters of 45 Steel Laser Cladding Ni60PTA Alloy Powder

Long

Qiu

et al. 2022

Coatings

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When laser cladding is used to repair parts, the interaction of parameters has a significant influence on equipment performance. In order to explore the process parameters and quality of Ni60PTA coating, the statistical relationship between the process parameters (laser power, scanning speed, and powder feeding rate) and the responses (dilution ratio, ratio of layer width to height, and contact angle) was established by experiments using the response surface method (RSM) and variance analysis. The results show that the laser power is the dominant factor affecting the dilution ratio. However, the scanning speed has the greatest influence on the ratio of layer width to height and contact angle. These experimental results show that the proposed model can predict the actual data. In addition, the microstructure and microhardness of the samples prepared with the optimum process parameters were characterized. The results show that the quality of the cladding layer is good without cracks, deformation, and pores. The microstructure of the cladding zone is mainly composed of γ (Ni), FeNi3, M (M = Fe, Ni, Cr)23C6, M7C3, and CrB. The average microhardness of the coating is about 620 HV0.2, which is about 3.1 times that of 45 steel substrate.

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Experimental and numerical analyses of geometrical and microstructural features of Tribaloy T-800 composite coating deposited via laser cladding-assisted with pre-heat (LCAP) process

Cited by 17 publications

References 42 publications

Improvement of Microstructure and Properties of Q235 Steel by Iron-Based Laser Cladding Coating

Improvement of Microstructure and Properties of Q235 Steel by Iron-Based Laser Cladding Coating

Co-Optimization of the Preparation Process of Ni-Based Self-Lubricating Coatings by Magneto-Thermal-Assisted Laser Cladding

Multi-Objective Optimization of Process Parameters of 45 Steel Laser Cladding Ni60PTA Alloy Powder

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