Optimization of Process Parameters for the Manufacturing of High Temperature Vacuum Brazed WC-NiCrBSi Coatings

Pascal, Dragoș Toader; Şerban, Viorel Aurel; Mărginean, Gabriela

doi:10.4028/www.scientific.net/ssp.254.164

Cited by 8 publications

(3 citation statements)

References 9 publications

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“…The high-temperature vacuum brazing process was carried out in a cold-wall vertical vacuum furnace HITERM 80 200, HITEC Materials, Karlsruhe, Germany, at a stable pressure of around 3.0 × 10 −4 mbar and a brazing temperature of 1000 °C, for a soaking time of 30 min. The detailed procedure of producing hardfacings with a similar chemical composition was presented in a different study [ 57 ].…”

Section: Methodsmentioning

confidence: 99%

Sliding Wear Behavior of High-Temperature Vacuum-Brazed WC-Co-NiP Functional Composite Coatings

Muntean

Pascal²,

Kazamer³

et al. 2021

Materials

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The present study aimed to investigate the tribological behavior of high-temperature vacuum-brazed WC-Co-NiP functional coatings deposited on 16MnCr5 case hardening steel. Dry sliding wear resistance was evaluated using a non-conformal ball-on-disk arrangement, at room temperature against 100Cr6 and WC-Co static partners, respectively. Morphological, microstructural, and chemical composition analyses showed a complex, phased structure composed of tungsten carbide, nickel, and hard cobalt-based η-structure. In the testing conditions, the coefficient of friction against 100Cr6 and WC-Co counterparts entered a steady-state value after approximately 1000 m and 400 m, respectively. The wear track analysis revealed phenomena of particles trapped between the sliding bodies, as well as gradual removal of asperities. The calculations of the wear rates proved that the values were strongly influenced by properties of the sliding system, such as crystal structure, stress discontinuities, hardness, and material homogeneity.

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Section: Methodsmentioning

confidence: 99%

Sliding Wear Behavior of High-Temperature Vacuum-Brazed WC-Co-NiP Functional Composite Coatings

Muntean

Pascal²,

Kazamer³

et al. 2021

Materials

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“…In this paper, based on the research status and development trend of cemented carbide coatings at home and abroad [20], WC-NiCrBSi composite coatings were prepared on the surface of substrate Q235 by combining vacuum brazing technology and flexible "coated cloth" technology. The effect of changing the brazing temperature on the coating was studied by examining the microstructure and properties of coatings after vacuum cladding, to understand the engineering applications of this type of coating.…”

Section: Introductionmentioning

confidence: 99%

Effect of Brazing Temperature on the Microstructure and Chosen Properties of WC–10Ni/NiCrBSi Composite Coatings Produced by Vacuum Cladding from Flexible Coated Cloths

Xu¹,

Ding²,

Xia³

et al. 2019

Coatings

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Three kinds of WC–10Ni/NiCrBSi composite coatings were prepared on the surface of Q235 carbon steel at 1015, 1055, and 1095 °C by vacuum brazing. The microstructure and properties of the composite coatings were investigated. The results showed that various reaction layers appeared at the bonding area of the coatings and the substrate. As the brazing temperature increased, the reaction layer between the solder and the hard phase gradually decreased and disappeared at 1095 °C. Simultaneously, the size of gray-white massive phases with a large amount of W in the brazing layer decreased gradually. When the brazing temperature increased, the Fe content markedly increased in the reaction layer of the matrix and the solder, indicating that the increase in brazing temperature was beneficial for metallurgical bonding between the coating and the substrate. Interface bonding strength and wear resistance were enhanced by the increase in brazing temperature; however, the microhardness of the composite coating section decreased. The interface bonding strength reached 362.9 MPa and the wear loss reached a minimum at 1095 °C.

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“…At present, many experts and scholars have done much research on structural design optimization and brazing process optimization methods. Through the empirical method, Pascal D. T. et al [9] optimized the brazing process parameters of metal composite coating to determine the best process parameter. Ju J. et al [10] studied the relationship between microstructure and properties of welded joints.…”

Section: Introductionmentioning

confidence: 99%

Application of brazing process design in optimization structure design of scraper

2018

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To effectively enhance the service life, the research of milling machine scraper structure design and welding process are optimized. Through the structural optimization analysis, the improved structure is obtained, and the working resistance force is reduced. The full factor test is used to optimize the brazing process, and the best parameters are obtained, which improves the shear strength. The accuracy of the model is verified by experiments. The results show that compared with the working resistance force, the improved scraper tends to be slow and the peak value is smaller. The cutting rake and relief angle of the scraper are optimized. When the cutting rake angle is 6° and the cutting relief angle is 9°, both working resistance force and impact force are minimum. It proves the accuracy of the simulation results. Using CT861 solder, brazing temperature is 75°C, and the brazing time is 10s. While the cooling method uses furnace cold, the minimum value of shear strength is 200MPa. The average working life of the scraper is raised from 800 hours to 1600 hours after the optimization design. Research results have guiding significance for the structure design and the welding process optimization of the scraper.

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Optimization of Process Parameters for the Manufacturing of High Temperature Vacuum Brazed WC-NiCrBSi Coatings

Cited by 8 publications

References 9 publications

Sliding Wear Behavior of High-Temperature Vacuum-Brazed WC-Co-NiP Functional Composite Coatings

Sliding Wear Behavior of High-Temperature Vacuum-Brazed WC-Co-NiP Functional Composite Coatings

Effect of Brazing Temperature on the Microstructure and Chosen Properties of WC–10Ni/NiCrBSi Composite Coatings Produced by Vacuum Cladding from Flexible Coated Cloths

Application of brazing process design in optimization structure design of scraper

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