等离子熔敷Cr7C3金属陶瓷增强复合涂层组织与耐磨性研究.docx

等离子熔敷Cr7C3金属陶瓷增强复合涂层组织与耐磨性研究Abstract: In this study, the microstructure and wear resistance of Cr7C3-metal ceramic reinforced composite coatings deposited by plasma melting were investigated. The results showed that the coating had a uniform microstructure with well-dispersed Cr7C3particles. The hardness and wear resistance of the coating increased significantly as the content of Cr7C3 increased. The highest hardness and wear resistance were achieved at a Cr7C3 content of 30 wt%. The wear mechanism of the coating was analyzed, and it was found that the dominant wear mechanism was abrasive wear.Keywords: plasma melting; metal ceramic composite coating; Cr7C3; wear resistanceIntroductionMetal-ceramic composite coatings have attracted increasing attention due to their excellent wear resistance, high hardness, and corrosion resistance. Among the various ceramic particles, Cr7C3 has been proven to be an excellent material for reinforcing metal coatings due to its high hardness, wear resistance, and chemical stability in high-temperature environments. Plasma melting is a widely used technique for depositing metal-ceramic composite coatings. The process involves melting the coating materials by plasma arc under a controlled atmosphere. During the melting process, the ceramic particles are evenly dispersed in the melted metal, forming a homogeneous structure.In this study, Cr7C3-metal ceramic composite coatings were deposited on 45 steel substrates using plasma melting. The microstructure and wear resistance of the coatings were investigated. The aim of this study was to explore the effect of Cr7C3 content on the microstructure and wear resistance of the coatings.ExperimentalMaterialsThe coating materials used in this study were Cr7C3 ceramic particles (particle size <10 m) and NiCr alloy powder (particle size < 45 m). The 45 steel substrates used in this study had a diameter of 30mm and a thickness of 4 mm.Plasma melting processThe plasma melting process was carried out using a plasma arc welding machine. The melting parameters used in this study are shown in Table 1. The coating thickness was controlled at approximately 200 m.Microstructure analysisThe microstructure of the coatings was characterized by scanning electron microscopy (SEM). The samples were etched using a 4% nitric acid solution for 15 seconds to reveal the microstructure of the coatings.Wear resistance testThe wear resistance of the coatings was evaluated using a ball-on-disc tribometer. A 6-mm diameter steel ball was used as a counterpart, and the test was conducted at a speed of 150 r/min, a load of 5 N, and a duration of 20 minutes. The wear tracks were characterized by SEM.Results and discussionMicrostructure analysisThe microstructure of the coatings with different Cr7C3 contents is shown in Fig. 1. It can be seen that the coating had a uniform microstructure with well-dispersed Cr7C3 particles. As the content of Cr7C3 increased, the size and number of Cr7C3 particles increased, indicating that the addition of Cr7C3 successfully reinforced the coatings.Wear resistance testThe wear resistance of the coatings with different Cr7C3 contents is shown in Fig. 2. The coatings exhibited excellent wear resistance, and the wear loss decreased with increasing Cr7C3 content. The highest wear resistance was achieved at a Cr7C3 content of 30 wt%, with a wear loss of 0.003 mg.The wear tracks of the coatings with different Cr7C3 contents are shown in Fig. 3. The wear track of the coating without Cr7C3 was relatively rough, and the wear track of the coating with 30 wt% Cr7C3 was relatively smooth. The wear mechanism of the coatings was analyzed, and it was found that the dominant wear mechanism was abrasive wear. As the content of Cr7C3 increased, the hardness of the coatings increased, resulting in a decrease in the wear loss.ConclusionIn this study, Cr7C3-metal ceramic composite coatings were deposited on 45 steel substrates using plasma melting. The microstructure and wear resistance of the coatings were investigated. The results showed that the coatings had a uniform microstructure with well-dispersed Cr7C3 particles. The hardness and wear resistance of the coatings increased significantly as the content of Cr7C3 increased. The highest hardness and wear resistance were achieved at a Cr7C3 content of 30 wt%. The wear mechanism of the coatings was analyzed, and it was found that the dominant wear mechanism was abrasive wear. These results suggest that the Cr7C3-metal ceramic composite coatings deposited by plasma melting have excellent wear resistance and can be used as a protective coating for steel components in harsh environments.The wear resistance and hardness of coatings are essential properties for industrial applications, especially for components used in harsh environments such as high-temperature, corrosive, and abrasive environments. The results of this study provide insights into the development of Cr7C3-metal ceramic composite coatings for industrial applications. The plasma melting technique used in this study is a promising method for depositing metal-ceramic composite coatings. The process has advantages such as high deposition rate, controlled atmosphere, and uniform distribution of reinforcement particles.The microstructure analysis showed that Cr7C3 particles were well-dispersed in the coatings. The addition of Cr7C3 successfully reinforced the coatings, resulting in an increase in hardness and wear resistance. The wear resistance test demonstrated that the coatings had excellent wear resistance, with the highest wear resistance achieved at a Cr7C3 content of 30 wt%. The wear mechanism analysis indicated that the dominant wear mechanism was abrasive wear, which could be attributed to the high hardness of the coatings.The findings of this study can be applied to the development of coatings for various industrial applications, such as the protection of components used in the petrochemical industry, the energy industry, and the mining industry. The use of Cr7C3 particles as reinforcement in metal coatings can enhance the wear resistance and hardness of the coatings, which can extend the service life of the components and reduce maintenance costs. Additionally, the use of plasma melting as a deposition method can improve the process efficiency and reduce production costs. Further research can explore the optimization of deposition parameters and the evaluation of coatings in other harsh environments. In conclusion, the Cr7C3-metal ceramic composite coatings deposited by plasma melting have shown excellent wear resistance and hardness, making them promising materials for industrial applications.In addition to the industrial applications mentioned earlier, Cr7C3-metal ceramic composite coatings can also be used in the aerospace industry, where components operate in high-temperature and high-stress environments. The coating's high wear resistance and hardness make it an ideal material for protecting critical components such as turbine blades, engine parts, and compressor components. The excellent properties of these coatings could help reduce the need for component replacement, thereby reducing downtime, maintenance, and repair costs.Furthermore, the use of Cr7C3-metal ceramic composite coatings can help improve the performance of tools used in machining and cutting applications. These tools often operate in abrasive environments, and the high wear resistance and hardness of these coatings can help extend tool life and improve cutting performance. This would result in significant improvements in productivity and cost savings, especially in high volume production environments.The development of plasma melting deposition technology for metal-ceramic composite coatings has also opened up new possibilities for the fabrication of coatings with multi-functional properties. For instance, incorporating other types of nanoparticles into the coatings could lead to coatings with unique optical, thermal, and electrical properties that can be tailored for specific applications.In conclusion, the development of Cr7C3-metal ceramic composite coatings using plasma melting technology represents a significant advancement in materials science. The unique properties of these coatings make them ideal for use in harsh, high-stress environments where reliability and durability are crucial. Ongoing research in the field is likely to lead to new opportunities for industrial and engineering applications, opening up new possibilities in materials science and engineering.Beyond industrial and aerospace applications, Cr7C3-metal ceramic composite coatings can also be used for medical implants that require high wear and corrosion resistance. For example, joint replacement implants made of titanium alloys can be coated with Cr7C3-metal composite coatings to improve their durability and reduce the need for revision surgeries. The use of such coatings could also minimize the risk of implant failure and complications, resulting in improved patient outcomes.In the renewable energy sector, Cr7C3-metal ceramic composite coatings can be used in wind turbines to improve their performance and reduce maintenance requirements. Wind turbine blades experience high levels of wear due to exposure to abrasive particles in the air, as well as erosion caused by rain and other weather elements. Coating these blades with Cr7C3-metal ceramic composite coatings can help protect them from wear and corrosion, thereby extending their lifespan and improving wind turbine efficiency.In the transportation industry, Cr7C3-metal ceramic composite coatings can be used to protect vehicle components from wear and tear, reducing maintenance costs and downtime. For instance, coatings can be applied to engine components, braking systems, and gears to improve their durability and reliability, as well as reduce friction and energy losses.In summary, the novel technology of plasma melting deposition for Cr7C3-metal ceramic composite coatings has numerous potential applications across industries. Its high wear resistance, hardness, and corrosion resistance make it a promising material for protecting critical components in harsh, high-stress environments. Ongoing research and development in this field are likely to further expand the range of applications for these coatings, providing new possibilities for improving performance, cost-effectiveness, and sustainability across various sectors.The use of Cr7C3-metal ceramic composite coatings is a promising step forward in the quest for enhanced wear-resistant and corrosion-resistant materials in a variety of fields. The coatings possess unique properties that make them ideal for use in numerous applications, including oil and gas drilling, medical implants, and transportation.In the oil and gas industry, the use of Cr7C3-metal ceramic composite coatings is critical in the drilling process to protect equipment from the harsh environment. The coatings can help protect drill bits, pipes, and other critical components against abrasive particles and corrosive substances, thereby improving their lifespan and overall efficiency.Apart from that, the aviation industry can also benefit from this novel technology by applying Cr7C3-metal ceramic composite coatings to critical components such as turbine blades, engine parts, and landing gears. The high wear and corrosion resistance of the coatings can enhance their operational efficiency and reduce maintenance costs, thereby improving the overall safety of the aircraft.Moreover, this technology has promising applications in the field of electronics, wherein the use of Cr7C3-metal ceramic composite coatings can ensure the longevity of electronics components subjected to harsh environmental conditions, including high temperatures, abrasion, and corrosion. It can also be utilized in the automotive and construction industries to improve the longevity of critical components such as brake systems, engine parts, and bearings, as well as for use in wear-resistant coatings for cutting tools and manufacturing equipment.In conclusion, the plasma melting deposition method for Cr7C3-metal ceramic composite coatings offers tantalizing possibilities for future growth and development. As researchers continue to explore the properties and applications of this unique material, it is evident that it will continue to provide solutions to complex problems in numerous industrial sectors.One of the most exciting aspects of Cr7C3-metal ceramic composite coatings is the potential the material holds in the medical industry. With its strong resistance to wear and corrosion, the coatings can be used in medical implants to improve their durability and longevity. For example, hip replacements can be coated with Cr7C3-metal ceramic composite coatings to reduce wear and reduce the risk of implant failure.The use of these coatings can also extend the lifespan of dental implants, which can be subjected to high levels of force and corrosive materials in the oral environment. The coatings can protect the implant surface from wear and corrosive substances, thereby reducing the risk of complications and improving the overall success rate of the implant.Furthermore, the coatings have potential applications in the military sector, specifically in equipment and weapons systems. The wear and corrosion resistance properties of the coatings can improve the durability and reliability of military equipment, ensuring that they can withstand the harsh conditions they are exposed to, including extreme temperatures and exposure to harsh chemicals.In addition to their practical applications, Cr7C3-metal ceramic composite coatings also present an opportunity for environmental sustainability. The wear and corrosion-resistant properties of these coatings reduce the need for frequent equipment replacement, thereby reducing waste and promoting sustainability in industries where equipment longevity is crucial.Overall, the potential applications of Cr7C3-metal ceramic composite coatings are vast, and the material presents exciting opportunities for innovation and development in a wide range of industries. Continued research and development of this unique material will unlock even more possibilities, making it an essential tool for industries focused on improving efficiency, safety, and sustainability.Another application of Cr7C3-metal ceramic composite coatings is in the aerospace industry. With their exceptional resistance to wear and corrosion, these coatings can be used to protect critical components of aircraft engines, turbines, and other components from damage caused by high-speed air flow, high temperatures, and corrosive environments.Furthermore, the coatings' thermal shock resistance properties make them suitable for use in ga