Suppression of dilution in Ni-Cr-Si-B alloy cladding layer by controlling diode laser beam profile

Tanigawa, Daichi; Funada, Yoshinori; Abe, Nobuyuki; Tsukamoto, Masahiro; Hayashi, Yoshihiko; Yamazaki, Hiroyuki; Tatsumi, Yoshihiro; Yoneyama, M.

doi:10.1016/j.optlastec.2017.09.019

Cited by 11 publications

(5 citation statements)

References 12 publications

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“…The dilution rates of coatings I, II, III and IV can be calculated as 9.09%, 6.54%, 4.76% and 5.21%, respectively. It is generally considered that the dilution rate of the coating is better at 5% [ 25 ].…”

Section: Resultsmentioning

confidence: 99%

Microstructures and Properties of Laser Cladding Al-TiC-CeO2 Composite Coatings

Dejun

Song

2018

Materials

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Al-TiC-CeO2 composite coatings have been prepared by using a laser cladding technique, and the microstructure and properties of the resulting composite coatings have been investigated using scanning electron microscopy (SEM), a 3D microscope system, X-ray diffraction (XRD), micro-hardness testing, X-ray stress measurements, friction and wear testing, and an electrochemical workstation. The results showed that an Al-Fe phase appears in the coatings under different applied laser powers and shows good metallurgical bonding with the matrix. The dilution rate of the coating first decreases and then increases with increasing laser power. The coating was transformed from massive and short rod-like structures into a fine granular structure, and the effect of fine grain strengthening is significant. The microhardness of the coatings first decreases and then increases with increasing laser power, and the maximum microhardness can reach 964.3 HV0.2. In addition, the residual stress of the coating surface was tensile stress, and crack size increases with increasing stress. When the laser power was 1.6 kW, the coating showed high corrosion resistance.

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Section: Resultsmentioning

confidence: 99%

Microstructures and Properties of Laser Cladding Al-TiC-CeO2 Composite Coatings

Dejun

Song

2018

Materials

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“…To perform predictive tests on the output response index regression equations (3)-(7), four sets of verification experimental data were selected to compare with the predicted data obtained from the respective regression equations. According to equation (8), the prediction error of each response index is shown in Table 8. According to the table, the average error of the coating width is 4.496%, the average error of the coating height is 1.150% and the average error of the aspect ratio is 3.364%.…”

Section: Optimization Of Process Parameters and Model Prediction Verimentioning

confidence: 99%

“…[3][4][5][6] As a new remanufacturing technology, laser cladding melts the coating material at the same time with the thin layer on the surface of the substrate after laser irradiation and forms a surface coating with extremely low dilution and metallurgical bonding with the substrate after rapid solidification. 7,8 The wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical properties of the base surface should be significantly improved, to achieve the purpose of surface modification or repair. [9][10][11] Because the cobalt-based laser cladding layer is widely used in harsh working conditions such as high-parameter valve sealing surface, Co-Cr-W alloy is used for laser cladding in this paper.…”

Section: Introductionmentioning

confidence: 99%

Multi-objective numerical simulation of geometrical characteristics of laser cladding of cobalt-based alloy based on response surface methodology

Cui

Zhang

Guo

et al. 2020

Measurement and Control

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The objectives of this study are to optimize the key process parameters of laser cladding remanufacturing parts, improve the sealing quality of the hemispherical valve and prolong and improve its service life and reliability. A high-power fiber-coupled semiconductor laser was used to fabricate a single Co-based alloy cladding layer on the pump valve material ZG45 plate. The key process parameters of laser power, scanning speed and powder feeding rate in the process of laser remanufacturing are taken as optimization variables, and the coating width, coating height, coating depth, aspect ratio and dilution rate are taken as response indexes. Based on the response surface analysis method, the central compound experiment is designed using Design-Expert software. The variance analysis of the experimental results is performed, and the regression prediction model of the process parameters relative to the corresponding index is established. Through analysis of the established perturbation diagram and three-dimensional response surface, it is concluded that the main influence factors of melting width and penetration depth are laser power and positive effect, and the main influence factors of melting height are scanning speed and negative effect. The average error of each regression prediction model is lower than 10%. The above research work has important guiding significance for optimizing the process parameters and improving the cladding quality of cobalt-based alloy on ZG45.

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“…Laser have been widely used in industrial, biomedical and other fields [1][2][3][4][5]. Beam size is an important attribute of laser because it not only marks the performance of the laser, but also it is involved in the calculation of optical intensity [6][7][8][9]. Optical intensity of laser needs to be provided for laser cutting [10], drilling [11], and remote welding in industry [12] and laser microscopy in biological science [13].…”

Section: Introductionmentioning

confidence: 99%

Study on laser spot size measurement by scanning-slit method based on back-injection interferometry

Tan,

Liao,

Wong

2024

Semiconductor Lasers and Laser Dynamics XI

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Spot size is an important parameter of the laser, which not only represents the resolution of laser, but is also involved in the calculation of other parameters. Nowadays, CCD imaging systems, scanning imaging systems, and other sensors are used to measure the laser spot size. But they are all lacking flexibility when measuring the spot size in different locations, not to mention their high cost. In this study, a new spot size measurement device based on laser back-injection interferometry was presented. The photodiode integrated with the laser diode was used to collect the feedback laser, then the laser spot size was calculated by the feedback current. A commercial CCD imaging system was used to provide the laser spot size as a reference. Results show that our spot size measurement device could measure the spot size (Full Width Half Maximum) of 5 laser diode modules both in the x (Gaussian-like profile) and y (top-hat-like profile) direction through scanning-slit. Though there are variations between the scanning-slit results and spot sizes from the CCD imaging system due to the diffuse and specular reflection, the accuracy of the spot size measurement device ranges from 96.07 % to 99.46 %, which proves the reliability of our device. It is believed that our device could provide an alternate method for laser spot size measurement, which is cost-effective, easy to operate, and accurate.

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Suppression of dilution in Ni-Cr-Si-B alloy cladding layer by controlling diode laser beam profile

Cited by 11 publications

References 12 publications

Microstructures and Properties of Laser Cladding Al-TiC-CeO2 Composite Coatings

Microstructures and Properties of Laser Cladding Al-TiC-CeO2 Composite Coatings

Multi-objective numerical simulation of geometrical characteristics of laser cladding of cobalt-based alloy based on response surface methodology

Study on laser spot size measurement by scanning-slit method based on back-injection interferometry

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