感应熔覆Invar36/Ni60复合涂层的温度场模拟及试验验证  

Temperature field simulation and experimental verification of Invar36/Ni60 composite coating by induction cladding

作　　者：李琪 石永军[1] 孙瑞[1] 王瑞海 翟昌民 Li Qi;Shi Yongjun;Sun Rui;Wang Ruihai;Zhai Changmin(College of Mechanical and Electrical Engineering,China University of Petroleum(East China),Qingdao Shandong 266580,China)

机构地区：[1]中国石油大学(华东)机电工程学院

出　　处：《金属热处理》2020年第1期69-75,共7页Heat Treatment of Metals

基　　金：中国石油科技创新基金(2017D-5007-0307)

摘　　要：采用有限元方法模拟了感应熔覆Invar36/Ni60复合涂层的温度场,并进行了试验验证,分析了不同工艺参数对温度分布的影响规律,研究了温度分布与涂层质量的关系。模拟结果表明:Invar36/Ni60复合涂层温度场的最高温度出现在基体表层附近,电流密度和电源频率是影响温度场的主要因素,Invar36含量的增加会使涂层温度出现小幅下降,并使涂层内外温度差增大。为提高熔覆成功率并减少裂纹缺陷,涂层内部的温度需控制在1430~1600℃,对涂层进行加热时,应选择2. 0×10~7A/m^2或更低一些的电流密度,加热时间控制在24~28 s之间。The temperature field of induction cladding Invar36/Ni60 composite coating was simulated by finite element method,and the experimental verification was carried out. The influence of different process parameters on temperature distribution was analyzed,and the relationship between temperature distribution and coating quality was studied. The simulation results show that the highest temperature field of Invar36/Ni60 composite coating appears near the surface of the substrate. Current density and power frequency are the main factors affecting the temperature field. Increasing the content of Invar36 will make the temperature of the coating decrease slightly and increase the temperature difference between inside and outside of coating. In order to improve the success rate of cladding and reduce the crack defects,the temperature inside the coating should be controlled between 1430-1600 ℃,when heating the coating,a current density of 2.0 × 10~7 A/m^2 or less should be selected,and the heating time should be controlled between 24 s and 28 s.

关 键 词：感应熔覆 有限元 温度场 复合涂层 

分 类 号：TG178[金属学及工艺—金属表面处理]