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Microstructure and Corrosion Resistance of Laser Cladded Coating of Medium-Entropy Alloy CoCrNi on Surface of Stainless Steel for Automobile
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Dongbao ZENG1, Yipeng HE2, Wenyu LIAO3
Mining and Metallurgical Engineering | 2024, 44(3) : 145 - 148
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Mining and Metallurgical Engineering | 2024, 44(3): 145-148
• MATERIALS •
Microstructure and Corrosion Resistance of Laser Cladded Coating of Medium-Entropy Alloy CoCrNi on Surface of Stainless Steel for Automobile
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Dongbao ZENG1, Yipeng HE2, Wenyu LIAO3
Affiliations
  • 1.Jiangxi Technical College of Manufacturing, Nanchang 330095, Jiangxi, China
  • 2.School of Mechanical Engineering, University of South China, Hengyang 421001, Hunan, China
  • 3.SAIC VOLKSWAGEN Automotive Co Ltd, Shanghai 201805, China
Published: 2024-06-01 doi: 10.3969/j.issn.0253-6099.2024.03.031
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In order to improve surface hardness and corrosion resistance of 304 stainless steel, a medium-entropy alloy (CoCrNi) coating was prepared on the surface of 304 stainless steel by laser cladding, and phase composition, element distribution and corrosion resistance of the cladded coating were studied. The results show that the treatment has achieved good metallurgical bonding between the cladded CoCrNi coating and the substrate, with no cracks, pores and other defects. The cladded coating is composed of single FCC phase, and exhibits dendrite and inter-dendrite structure. The elements are uniformly distributed on the cladded coating without obvious segregation. The uniform distribution of Cr element plays a positive role in improving corrosion resistance of the coating. The CoCrNi coating has its polarization resistance (101.65 kΩ) higher than that of 304 substrate (90.56 kΩ), and also significantly higher corrosion resistance.

high-entropy alloy  /  cladded coating  /  surface treatment  /  laser cladding  /  CoCrNi  /  medium-entropy alloy  /  corrosion resistance  /  304 stainless steel  /  automobile material
Dongbao ZENG, Yipeng HE, Wenyu LIAO. Microstructure and Corrosion Resistance of Laser Cladded Coating of Medium-Entropy Alloy CoCrNi on Surface of Stainless Steel for Automobile[J]. Mining and Metallurgical Engineering, 2024 , 44 (3) : 145 -148 . DOI: 10.3969/j.issn.0253-6099.2024.03.031
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Article Info
doi: 10.3969/j.issn.0253-6099.2024.03.031
  • Receive Date：2023-11-25
  • Online Date：2026-03-17
  • Published：2024-06-01
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  • Received：2023-11-25
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Affiliations
    1.Jiangxi Technical College of Manufacturing, Nanchang 330095, Jiangxi, China
    2.School of Mechanical Engineering, University of South China, Hengyang 421001, Hunan, China
    3.SAIC VOLKSWAGEN Automotive Co Ltd, Shanghai 201805, China
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表12种不同金属材料的力学参数
科
Family		 属数
Number of
genus		 种数
Number of
species		 占总种数比例
Percentage of
total species (%)		 属
Genus		 种数
Number of
species		 占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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