CuCr/Cu contact material fabricated via high-speed laser cladding

Xie, Hongbin; Guan, Weimian; Lv, Hao; Gao, Mingyu; Liu, Xinying; Yang, Hanyu; Fang, Youtong; Liu, Jiabin; Dong, Wei; Wang, Hongtao

doi:10.1007/s00170-022-10487-7

Cited by 9 publications

(2 citation statements)

References 60 publications

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“…Xie H. et al successfully manufactured contact surfaces with metallurgical bonding heterostructures through high-speed LC, which had much higher hardness than commercial alloys. The conductivity of the two materials was similar, and the arc erosion rate and wear rate were lower than commercial contact surfaces [10]. Chai Q et al studied ultrasonic vibration assisted LC technology to improve the CLMP.…”

Section: Related Workmentioning

confidence: 99%

Laser cladding powder flow field detection system based on ISR optimization algorithm

Tong,

Wang,

Jin

2024

J. meas. eng.

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In coaxial powder feeding laser cladding, the morphology of the powder flow field is crucial for the forming quality. Therefore, this study utilizes high-speed imaging technology and an Image Super Resolution algorithm to create a laser cladding powder flow field detection system that is capable of detecting and tracking powder particles in the laser cladding environment. The experiment shows that the optimized algorithm has significant improvement in structural similarity indicators, with an improvement rate of nearly 11 %. For powder particle tracking, the distance accuracy of the optimized model is 1.5 lower than that of the unimproved model. In addition, by combining with the Kalman filtering algorithm, the tracking effect of powder particles has been further improved. This paper also found a relationship between powder transfer rate and powder utilization rate. In summary, the powder flow field analysis based on visual detection and image processing technology designed in this study can effectively reflect and predict the trend of changes in cladding quality.

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Section: Related Workmentioning

confidence: 99%

Laser cladding powder flow field detection system based on ISR optimization algorithm

Tong,

Wang,

Jin

2024

J. meas. eng.

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“…Cr has a specific solid solubility in the α-Cu matrix at high temperatures [15,16]. As the temperature decreases, the solid solubility of Cr decreases sharply [9,17,18]. Fine precipitates would form in the α-Cu matrix, which could strengthen the matrix and prohibit recrystallisation.…”

Section: Introductionmentioning

confidence: 99%

Effects of Zn addition on the microstructure and properties of Cu–Cr alloys

Lei

Xu³

et al. 2023

Materials Science and Technology

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Many attempts were conducted to improve Cu–Cr alloys’ softening temperature, strength, and electrical conductivity. After homogenised treatment at 900°C for 4 h, hot rolled by 80% at 900°C, solid solution treated at 940°C for 2 h, cold rolled by 50%, and aged at 450°C for 1 h, cold rolled by 50%, and aged at 450°C for 0.5 h, the tensile strength, yield strength, microhardness, and electrical conductivity of the fabricated Cu–2Cr–1Zn alloy were 616.7, 540.1 MPa, 176.7 HV, and 71.5% IACS, respectively, with a softening temperature of 530°C. Orowan precipitation strengthening was the primary strengthening mechanism. These findings bring an effective way to improve the strength and softening temperature with a small loss of electrical conductivity.

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Laser Cladding of Layered Ti/Nb/Cu Cathode with Homogeneous Arc Ablation Behaviors

Guan

Gao

et al. 2023

Adv Eng Mater

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Arc ablation threatens the cathode operating time and restricts the development of high‐power arc heaters. Surface modification is an effective strategy in improving cathode ablation resistance without reducing matrix conductivities. Herein, Nb layer and Ti layer are laser clad on Cu matrix to decrease the arc ablation of Cu cathode. The total thickness of laser‐clad Nb/Ti layer reaches 1850 μm. The Nb layer restrains Cu from diluting into surface cladding and no detrimental Ti–Cu intermetallic is formed. The surface Ti content is as high as 98.34 at%, guaranteeing the arc discharge homogeneity. The arc ablation behaviors of Ti/Nb/Cu cathodes are investigated in air atmosphere. The layered cathode discharges and ablates homogeneously. The arc discharge center is shallow with no appearance of deep pits or craters. The maximum ablation depth (72.1 μm) after 30 s discharging is ≈33.4% lower than that of Cu cathode. Besides, the cathode ablation rate, 1.61 μg C−1, is ≈27.5% lower than Cu cathode. The improved arc ablation resistance is interpreted in the protective effect of refractory TiO2 layer formed during air arc discharging.

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CuCr/Cu contact material fabricated via high-speed laser cladding

Cited by 9 publications

References 60 publications

Laser cladding powder flow field detection system based on ISR optimization algorithm

Laser cladding powder flow field detection system based on ISR optimization algorithm

Effects of Zn addition on the microstructure and properties of Cu–Cr alloys

Laser Cladding of Layered Ti/Nb/Cu Cathode with Homogeneous Arc Ablation Behaviors

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