Geometry and dilution rate analysis and prediction of laser cladding

Xi, Wenchao; Song, Baoyan; Yú, Zhao; Yu, Tianbiao; Jun, Wang

doi:10.1007/s00170-019-03932-7

Cited by 58 publications

(17 citation statements)

References 23 publications

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“…If the dilution rate is too low, the bonding strength between the coating and the matrix will be too weak. If the dilution rate is too high, the composition of cladding material will change, obviously, and the original performance of alloy powder will be weakened, and the tendency of cracks in cladding layer will be increased, even spalling [21,22]. Xu [23] and Du [24] predicted the influence of dilution rate on the microstructure and performance of the cladding layer through machine learning and numerical simulation methods, and it was found that a reasonable dilution rate is crucial to the control of microstructure and performance of the cladding layer.…”

Section: Introductionmentioning

confidence: 99%

Effect of Fe Content on Microstructure and Properties of Laser Cladding Inconel 625 Alloy

Liu

Li²,

Guofa³

et al. 2022

Materials

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Dilution rate is one of most important factors influencing the microstructure and performance of the laser cladding layer. In order to obtain a reasonable dilution rate in the laser cladding layer of Inconel 625 alloy, the laser cladding layers with different Fe content were prepared on the surface of 20# steel by the laser cladding technique. The influence of Fe content on the microstructure and performance of Inconel 625 alloy cladding layer was investigated. The results indicate that with the increase in Fe content in the alloy, the grain size of the cladding layer becomes coarser, the grain orientation difference increases first and then decreases, and the grain boundary angle decreases first and then increases. The hardness, high temperature wear resistance, and high temperature corrosion resistance gradually decreased. It is concluded that the dilution rate of Fe in laser cladding Inconel 625 alloy should be under 5 wt.%.

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Section: Introductionmentioning

confidence: 99%

Effect of Fe Content on Microstructure and Properties of Laser Cladding Inconel 625 Alloy

Liu

Li²,

Guofa³

et al. 2022

Materials

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“…The aspect ratio (d) is an important characteristic for coating applications and additive manufacturing [45]. In pure coating applications, it has a decisive influence on the path calculation of the surface to be coated (overlap ratio).…”

Section: Discussionmentioning

confidence: 99%

“…However, the main process parameters, i.e., laser power, feed rate and powder mass flow, are crucial for a qualitative results [43]. The quality of the clad is evaluated by the degree of dilution [44,45], density [46], cracks [47,48] and the microstructure. Furthermore, economical aspects such as powder efficiency and build rate are considered.…”

Section: Introductionmentioning

confidence: 99%

Process Map Definition for Laser Metal Deposition of VDM Alloy 780 on the 316L Substrate

Paulus

Ruppert

Vielhaber

et al. 2023

JMMP

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VDM Alloy 780 is a novel Ni-based superalloy that allows for approximately 50 °C higher operating temperatures, compared to Inconel 718, without a significant decrease in mechanical properties. The age hardenable NiCoCr Alloy combines increased temperature strength with oxidation resistance, as well as improved microstructural stability due to γ′-precipitation. These advantages make it suitable for wear- and corrosion-resistant coatings that can be used in high temperature applications. However, VDM Alloy 780 has not yet been sufficiently investigated for laser metal deposition applications. A design of experiments with single tracks on 316L specimens was carried out to evaluate the influence of the process parameters on clad quality. Subsequently, the quality of the clads was evaluated by means of destructive and non-destructive testing methods, in order to verify the suitability of VDM Alloy 780 for laser metal deposition applications. The single-track experiments provide a basis for coating or additive manufacturing applications. For conveying the results, scatter plots with regression lines are presented, which illustrate the influence of specific energy density on the resulting porosity, dilution, powder efficiency, aspect ratio, width and height. Finally, the clad quality, in terms of porosity, is visualized by two process maps with different mass per unit lengths.

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“…There is much sense that a strong intermixture and metallurgical bond with minimum dilution can be provided by laser cladding [21]. Many studies have indicated that the cladding layer of low dilution rate has well microstructure and mechanical properties [21,27]. As shown in Eq.…”

Section: Processing Parametersmentioning

confidence: 99%

Laser additive remanufacturing parameters optimization and experimental study of heavy-duty sprocket

Guo

Yue

et al. 2021

Int J Adv Manuf Technol

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Experimental research on laser additive remanufacturing technology of heavy-duty sprocket was carried out. The influences of laser power, scanning speed and powder feeding rate on cladding height, cladding area, melting area and dilution rate were compared and analyzed. The prediction models of the combination of process parameters with the geometric characteristics of cladding layer and dilution were established. A multi-objective process parameter optimization model with the maximum cladding height and cladding area maximum, the minimum melting area and dilution rate as objective functions was established, and the model was optimized and solved based on MOPSO algorithm. The laser additive remanufacturing repairing experiment of damaged sprocket was carried out by using the optimal parameters combination, and the microstructure and mechanical properties of the repaired region were analyzed. The results show that the scanning speed and powder feeding rate are the main factors influencing the geometric characteristics and dilution of the cladding area, and the models have good prediction accuracy. The optimal process parameters (1150 W, 950 mm/min, 3.8 rad/min) obtained by MOPSO algorithm is adopted to repair the damaged sprocket. The repaired area without cracks and pores, the cladding layer shows good metallurgical bonding with the substrate and the microhardness is twice that of the substrate. The experimental results prove that the laser additive remanufacturing technology is feasible to repair the damaged heavy-duty sprocket and has a strong engineering application prospect.

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Geometry and dilution rate analysis and prediction of laser cladding

Cited by 58 publications

References 23 publications

Effect of Fe Content on Microstructure and Properties of Laser Cladding Inconel 625 Alloy

Effect of Fe Content on Microstructure and Properties of Laser Cladding Inconel 625 Alloy

Process Map Definition for Laser Metal Deposition of VDM Alloy 780 on the 316L Substrate

Laser additive remanufacturing parameters optimization and experimental study of heavy-duty sprocket

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