Research Status and Analysis of Co-Based Composite Coatings Prepared by Laser Cladding

Haoqiang Zhang; Hao Liu; Yin Liu; Qiang Li; Suoxia Hou

doi:10.3788/LOP221037

Laser & Optoelectronics Progress, Volume. 60, Issue 9, 0900004(2023)

Research Status and Analysis of Co-Based Composite Coatings Prepared by Laser Cladding

Haoqiang Zhang¹, Hao Liu¹, Yin Liu¹, Qiang Li², and Suoxia Hou^1、*

Author Affiliations

¹College of Mechanical Engineering,North China University of Science and Technology, Tangshan 063210, Hebei, China

²Tangshan Zhongmao Technology Co., Ltd., Tangshan 064300, Hebei, China

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Figures & Tables(5)

Fig. 1. Schematic of laser cladding process

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Fig. 2. Microhardness diagram ^[17]. (a) Microhardness diagram at different powers; (b) average hardness comparison

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$SEM images of the coating with different TaC mass fractions [30]. (a) 0%; (b) 10%; (c) 20%; (d) 30%$

Fig. 3. SEM images of the coating with different TaC mass fractions ^[30]. (a) 0%; (b) 10%; (c) 20%; (d) 30%

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Table 1. Comparison of surface technical characteristics ^[1-2]

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Table 1. Comparison of surface technical characteristics ^[1-2]

Type of surface technology	Single coating thickness /mm	Bonding	Dilution rate /%	Environmental protection level
Laser cladding	0.5-2	Metallurgical bonding	<10	No pollution
Plasma spray	0.05-0.5	Mechanical bonding	5-15	Noise+dust pollution
Electroplating	<0.1	Physical bonding	-	Heavy metal pollution
Overlaying	0.3-1.0	Metallurgical bonding	10-20	No pollution
Ultra-high speed flame spraying	0.01-0.05	Mechanical bonding	5	Dust+noise pollution

Table 2. Comparison of common solid lubricants^[53-55]

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Table 2. Comparison of common solid lubricants^[53-55]

Type	Material	Benefit	Challenge
Layered solid	Graphite，sulfide（MoS₂、GaS、WS₂），h-BN	Lowest friction and wear rate，low cost	High temperature oxidation
Fluoride	TiF₃，CaF₂，BaF₂	Lowest friction and wear rate，low cost	High temperature oxidation
Soft metal	Ag，Au，Pb，Sn，Zn	Oxidation stability，self-adjusting temperature	Rapid diffusion to the surface depletes the metal lubricant coating
Oxide	TiO₂，V₂O₅，PbO，Al₂O₃，WO₃，ZnO，MoO₃	Low coefficient of friction	Wear occurs at low temperatures
Composite metal oxide	AgVO₃	Low coefficient of friction	Wear occurs at low temperatures
Mixed solid lubricant	WS₂+Ag+h-BN，Mo₂S+Ag、Mo₂S/WS₂+Cu，Graphite+ Mo₂S	Suitable for wide temperature range，different lubricants have complementary properties	Process complex

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Haoqiang Zhang, Hao Liu, Yin Liu, Qiang Li, Suoxia Hou. Research Status and Analysis of Co-Based Composite Coatings Prepared by Laser Cladding[J]. Laser & Optoelectronics Progress, 2023, 60(9): 0900004

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