Effect of vacuum heat treatment on microstructure and tribological properties of FeCrMoCby amorphous alloy coatings at different temperatures

doi:10.12143/j.ztgc.2021.S1.010

Home > Archive>Volume 48, Issue S1, 2021 >61-69. DOI:10.12143/j.ztgc.2021.S1.010

Effect of vacuum heat treatment on microstructure and tribological properties of FeCrMoCby amorphous alloy coatings at different temperatures
DOI:
                        10.12143/j.ztgc.2021.S1.010
                    
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Author:
                        LI Runjie1LI Runjie
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China
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ZHANG Xinyi1ZHANG Xinyi
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China
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KANG Jiajie1,2KANG Jiajie
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China;Zhengzhou Research Institute, China University of Geosciences (Beijing), Zhengzhou Henan 451283, China
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YUE Wen1,2YUE Wen
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China;Zhengzhou Research Institute, China University of Geosciences (Beijing), Zhengzhou Henan 451283, China
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LIANG Jian3LIANG Jian
Institute of Exploration Techniques, CAGS, Langfang Hebei 065000, China
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FU Zhiqiang1,2FU Zhiqiang
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China;Zhengzhou Research Institute, China University of Geosciences (Beijing), Zhengzhou Henan 451283, China
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ZHU Lina1,2ZHU Lina
School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China;Zhengzhou Research Institute, China University of Geosciences (Beijing), Zhengzhou Henan 451283, China
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ZHANG Ran4ZHANG Ran
Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, CAGS, Zhengzhou Henan 450006, China
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Affiliation:1.School of Engineering and Technology, China University of Geosciences (Beijing), Beijing 100083, China;2.Zhengzhou Research Institute, China University of Geosciences (Beijing), Zhengzhou Henan 451283, China;3.Institute of Exploration Techniques, CAGS, Langfang Hebei 065000, China;4.Zhengzhou Institute of Multipurpose Utilization of Mineral Resources, CAGS, Zhengzhou Henan 450006, China
Clc Number:P634.4
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Abstract:

In deep geological drilling， complex downhole conditions raises demanding requirements on drilling performance and reliability of drilling tools. Wear-resistant and corrosion-resistant amorphous coating on the surface of drilling tool steel can effectively improve its service life. Among them， Fe based amorphous alloy coating has important application value and good economic benefits because of its excellent corrosion resistance and wear resistance， strong amorphous formation ability and other advantages. An amorphous alloy coating composed of Fe₄₈Cr₁₅Mo₁₄C₁₅B₆Y₂ （at.%） was prepared on the 35CrMo substrate by air plasma spraying （APS） technology， and subjected to vacuum heat treatment at different temperatures. The effects of heat treatment at different temperatures on the basic properties and wear failure mechanism of the coatings were investigated. The results showed that vacuum heat treatment produced a large amount of hard phase and homogenized the composition； thus， improving the wear resistance of the coating. With the increase of heat treatment temperature， the coating wear rate decreases gradually. Compared with the coating either without heat treatment or with 750℃ heat treatment， the coating with heat treatment at 850℃ had the best wear resistance， and the wear rate was only 16.7% of that of Fe based amorphous coating without heat treatment. Failure mechanisms of the coatings either with or without heat treatment all include adhesion wear， abrasive wear， fatigue wear and oxidation wear.

Key words:air plasma spraying;Fe based amorphous coating;vacuum heat treatment;friction and wear

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History

Received:May 28,2021
Revised:May 28,2021
Adopted:July 09,2021
Online: December 06,2021
Published: September 01,2021

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