王皓杰,武三栓,张科杰,孙文,黄仁忠,余敏,谢迎春.冷喷涂IN718涂层组织及性能研究[J].表面技术,2022,51(10):361-369.
WANG Hao-jie,WU San-shuan,ZHANG Ke-jie,SUN Wen,HUANG Ren-zhong,YU Min,XIE Ying-chun.Microstructure and Properties of Cold Sprayed IN718 Coating[J].Surface Technology,2022,51(10):361-369
冷喷涂IN718涂层组织及性能研究
Microstructure and Properties of Cold Sprayed IN718 Coating
  
DOI:10.16490/j.cnki.issn.1001-3660.2022.10.039
中文关键词:  冷喷涂  工作气体  IN718涂层  组织结构  力学性能
英文关键词:cold spray  working gas  IN718 coating  microstructure  mechanical properties
基金项目:广东省特支计划(2019BT02C629);广州市重点领域研发计划(202007020008);国家自然科学基金(52001078)
作者单位
王皓杰 西南交通大学 材料科学与工程学院,成都 610063;广东省科学院新材料研究所a.现代材料表面工程技术国家工程实验室b.广东省现代表面工程技术重点实验室,广州 510650 
武三栓 中国航发南方工业有限公司,湖南 株洲 412002 
张科杰 广东省科学院新材料研究所a.现代材料表面工程技术国家工程实验室b.广东省现代表面工程技术重点实验室,广州 510650 
孙文 广东省科学院新材料研究所a.现代材料表面工程技术国家工程实验室b.广东省现代表面工程技术重点实验室,广州 510650 
黄仁忠 广东省科学院新材料研究所a.现代材料表面工程技术国家工程实验室b.广东省现代表面工程技术重点实验室,广州 510650 
余敏 西南交通大学 材料科学与工程学院,成都 610063 
谢迎春 广东省科学院新材料研究所a.现代材料表面工程技术国家工程实验室b.广东省现代表面工程技术重点实验室,广州 510650 
AuthorInstitution
WANG Hao-jie School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610063, China;a.National Engineering Laboratory for Modern Materials Surface Engineering Technology b.The Key Lab of Guangdong for Modern Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China 
WU San-shuan Air China South Industry Co., Ltd., Hunan Zhuzhou 412002, China 
ZHANG Ke-jie a.National Engineering Laboratory for Modern Materials Surface Engineering Technology b.The Key Lab of Guangdong for Modern Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China 
SUN Wen a.National Engineering Laboratory for Modern Materials Surface Engineering Technology b.The Key Lab of Guangdong for Modern Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China 
HUANG Ren-zhong a.National Engineering Laboratory for Modern Materials Surface Engineering Technology b.The Key Lab of Guangdong for Modern Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China 
YU Min School of Materials Science and Engineering, Southwest Jiaotong University, Chengdu 610063, China 
XIE Ying-chun a.National Engineering Laboratory for Modern Materials Surface Engineering Technology b.The Key Lab of Guangdong for Modern Surface Engineering Technology, Institute of New Materials, Guangdong Academy of Sciences, Guangzhou 510650, China 
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中文摘要:
      目的 针对Ti6Al4V耐磨性能较差的问题,利用高压冷喷涂技术在Ti6Al4V基体表面以不同的工艺参数制备了IN718涂层,为在Ti6Al4V基体表面制备高性能IN718涂层提供基础理论依据。方法 采用光学显微镜和扫描电子显微镜对涂层组织、断口形貌进行观察分析,以便更好地了解不同的工艺参数和工作气体类型(He/N2)对IN718涂层组织形貌、力学性能和摩擦磨损性能的影响。结果 以N2为推进气体制备的IN718涂层,其结合强度为115 MPa,硬度为557HV0.3,孔隙率约为0.24%,涂层磨损率为5.34×10–4 mm3/(N.m);以He为推进气体制备的IN718涂层,其结合强度可高达256 MPa,是以N2为推进气体制备涂层的2倍多,硬度为602HV0.3,明显高于以N2为推进气体制备的涂层,涂层孔隙率和缺陷明显减少,孔隙率测试结果约为0.1%,涂层更加耐磨,磨损率为3.51×10–4 mm3/(N.m)。结论 相较于以N2为推进气体制备的IN718涂层,以He为工作气体制备的IN718涂层的组织更致密、涂层孔隙率更小,硬度和结合强度更高,耐磨性能更好,所以采用He可以制备出性能更加优异的IN718涂层。
英文摘要:
      Cold spray technology is an emerging additive manufacturing technology. Its low temperature and high speed characteristics enable powder particles to be deposited on the surface of the substrate in a solid form, effectively avoiding the oxidation of the coating and the thermal stress damage to the substrate. The sediment has a compact structure and excellent mechanical properties. The work aims to prepare IN718 coating by high pressure cold spray technology on the surface of Ti6Al4V substrate with different process parameters to solve the problem of poor wear resistance of Ti6Al4V, thus providing a basic theoretical basis for the preparation of high-performance IN718 coating on the surface of Ti6Al4V substrate. 100 mm×100 mm×3 mm Ti6Al4V substrate was taken as the base material and polished with sandpaper, and cleaned. Industrial IN718 powder was taken as raw material, with main components of Ni, Cr, Nb and Mo. In the cold spray process, N2 (5 MPa, 950 ℃) and He (3 MPa, 950 ℃) were used as carrier gases, the distance between the gun nozzle and the substrate was 30 mm, and the delivery rate was 100 g/min. Optical microscope (VHX-900) and field emission scanning electron microscope (GeminiSEM300) were used to observe the fracture morphology, wear morphology and cross-sectional structure of the coating. The microhardness tester (FM-700) was used to test the microhardness of the coating and the substrate, the friction and wear tester (MS-T3000) was applied to test the friction and wear, and the three-dimensional surface profiler (DEKTAK XT) was adopted to measure the wear profile and volume of the coating. Then, the friction and wear rate was calculated. The effects of different process parameters and working gas types (He/N2) on the microstructure, mechanical properties and friction and wear properties of IN718 coating were studied. The IN718 coating prepared with N2 as the propellant gas had a bonding strength of 115 MPa, a hardness of 557HV0.3, a porosity of about 0.24%, and a coating wear rate of 5.34×10–4 mm3/(N.m). The bonding strength of the IN718 coating prepared with He as the propellant gas was as high as 256 MPa, which was more than twice that of the coating prepared with N2 as the propelling gas, and the hardness was 602HV0.3, which was significantly higher than that of the coating prepared with N2 as the propellant gas. The porosity and defects of the coating were significantly reduced, the porosity test result was about 0.1%, the coating was also more wear-resistant, and the wear rate was 3.51×10–4 mm3/(N.m). Compared with the IN718 coating prepared with N2 as the propellant gas, the IN718 coating prepared with He as the working gas has denser structure, lower coating porosity, higher hardness and bonding strength and better wear resistance. Therefore, He can be used to prepare IN718 coating with better performance. Under the optimal parameters, cold spray technology can be used to prepare dense coatings with high interfacial bonding. Using He as the carrier gas to increase the deposition rate of powder particles is the main reason for improving the wear resistance of the coating. High hardness, low porosity and defects effectively reduce the occurrence of friction shedding.
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