等离子喷涂工艺参数对Al_2O_3涂层硬度的影响  

Effects of Plasma Spraying Parameters on Hardness Properties of Al_2O_3 Coatings

作　　者：朱昱[1] 魏金栋[1,2] 周燕琴[1] 李小武[1,2] 孙书刚 倪红军[1] 

机构地区：[1]南通大学机械工程学院,南通226019 [2]南通高欣耐磨股份有限公司,南通226000

出　　处：《中国陶瓷》2017年第6期54-58,共5页China Ceramics

基　　金：江苏高校优势学科建设工程资助项目(PAPD);江苏省重点研发项目(BE2016107)

摘　　要：针对等离子喷涂电弧电压、电弧电流、主气流量和送粉量等工艺参数对制备Al_2O_3涂层组织及性能的影响,采用正交试验方法进行参数化设计,通过直观分析确定涂层硬度指标下的最佳工艺组合参数。试验结果表明:影响涂层硬度的主次因素排序为氩气流量、电流、送粉量、电压。最佳参数组合为:电弧电压为60 V,电弧电流为600 A,送粉量为25 g·min^(-1),氩气流量为2000 L·H^(-1),最佳工艺组合参数下得到的涂层组织更加致密,硬度为914.6 HV。Plasma spray process parameters of arc voltage, arc current, main air flow and powder feeding amount for Al2O3 ceramic coating were optimized by orthogonal experiment parameter design based on the preparation and properties of Al2O3 coating, the optimum process parameters were determined by the intuitive analysis of the coating hardness indicators. The results show that the primary and secondary factors affecting the hardness of the coating is Ar gas flow, arc current powder feed rate, arc voltage, respectively. The optimized parameters are arc voltage of 60 V, arc current of 600 A, powder feed rate of 25 g· min^-1, Ar gas flow of 2000 L· H^-1. The coating structure was more density and the hardness of coating is 914.6 HV by the optimized parameters.

关 键 词：等离子喷涂 AL2O3涂层 硬度 正交试验 工艺参数 

分 类 号：TQ174.758.22[化学工程—陶瓷工业]