Effects of laser power on performance of cladding Ni-based alloy coating on surface of butterfly valve

WU Qiang; LIU Zheng; LIN Jixing; TONG Xian; BAI Guangzhu; ZHAO Yuncai

doi:10.13264/j.cnki.ysjskx.2016.04.007

Volume 7 Issue 4

Aug. 2016

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Nonferrous Metals Science and Engineering > 2016 > 7(4): 40-44. > DOI: 10.13264/j.cnki.ysjskx.2016.04.007

WU Qiang, LIU Zheng, LIN Jixing, TONG Xian, BAI Guangzhu, ZHAO Yuncai. Effects of laser power on performance of cladding Ni-based alloy coating on surface of butterfly valve[J]. Nonferrous Metals Science and Engineering, 2016, 7(4): 40-44. DOI: 10.13264/j.cnki.ysjskx.2016.04.007

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Effects of laser power on performance of cladding Ni-based alloy coating on surface of butterfly valve

1a.
School of Mechanical and Electrical Engineering
1b.
School of Materials Science and Engineering; Jiangxi University of Science and Technology, Ganzhou 341000, China
2.
Department of Material Engineering, Zhejiang Industry & Trade Vocational College, Wenzhou 325003, China

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Received Date: July 29, 2015
Published Date: August 30, 2016

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Abstract

Abstract

The effect of laser power on the dilution rate, microstructure, corrosion resistance and hardness of the coating were investigated by adopting semiconductor laser to laser clad Ni based alloy coating on 2205 duplex stainless steel and by means of SEM, electrochemical synthesis tester and hardness tester. The results show that dilution rate of the coatings increases with the increase of the laser power and there is more convection and diffusion of the cladding layer and the matrix elements; cladding layer resistance corrosion resistance decreases with the increase of the laser power when laser power is 2.7 kW, the cladding layer of the self corrosion potential is -0.46 mV which is at minimum, and corrosion current is 3.47×10^-5 A/cm² which is at minimum. The hardness test results show that the hardness of the laser clad Ni based alloy coating is up to 680 HV, which is about 2.5 times that of the matrix alloy.
- laser cladding,
- Ni based alloy,
- dilution rate,
- micro hardness,
- corrosion resistance

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