摘要
利用超音速火焰喷涂工艺在Cr12模具钢基体表面上制备了不同材料配比的Ni60B-WC/Co涂层.采用金相显微镜、扫描电镜、显微硬度仪和摩擦磨损试验机表征分析涂层的微观形貌、显微硬度和磨损性能.采用L8(27)的回归正交设计实验方案,建立了涂层材料、喷涂工艺与涂层磨损性能之间的数学模型.在满足约束条件情况下对目标函数求极值,得到最优方案.结果表明:各组分质量分数为w(Ni60B)=51%、w(WC)=36%、w(Co)=13%,喷涂距离为320mm时涂层磨损性能最好;涂层的磨损机理主要为微观切削和脆硬相的微观剥落;涂层各处显微硬度值均大于HV_(0.2)851,是基体(HV_(0.2)277)的3~5倍.
On the surface of the Cr12 die steel substrate,Ni60B-WC/Co coating was prepared with different material ratio by high velocity oxygen fuel, the microstructure, microhardness and abrasion resistance of the Coatings was characterized by metallographic microscope, scanning electron microscope, microhardness tester and friction and wear tester.The L8 （27） of the regression orthogonal experimental de; sign, the mathematical model of coating material, coating process and wear resistance were established. In order to meet the constraints of the objective function, the optimal solution is obtained. The results showed that when the mass fraction of each component was w（.Ni60B）=51% ,w（WC）=36% ,w（Co）= 13 %and the spraying distance was 320 mm, the abrasion resistan,ce of the coating was the best.The wear mechanism of the coating is mainly micro cutting and micro hardness Of the hard and brittle phase.The microhardness,of the coating is greater than HV0.2851,3 to 5 times of the substrate（HVo.a277）,
作者
李凯
刘宁
程敬卿
朱协彬
祝夫文
LI Kai LIU Ning CHENG Jing-qing ZHU Xie-bin ZHU Fu-wen(College of Mechanical and Automotive Engineering ,Anhui Polytechnic University, Wuhu 241000, China)
出处
《安徽工程大学学报》
CAS
2017年第4期31-36,共6页
Journal of Anhui Polytechnic University
基金
安徽省科技计划基金资助项目(1501021005)
