论文部分内容阅读
采用高速电弧喷涂技术在16MnR钢表面制备Zn-Al合金涂层,利用正交试验研究了喷涂工艺参数对涂层结合强度、孔隙率和显微硬度的影响。结果表明,在研究范围内,影响涂层结合强度的最显著因素为喷涂气压,影响涂层孔隙率的最显著因素为喷涂电压,影响涂层显微硬度的最显著因素为喷涂距离。优化的工艺参数为喷涂电压30 V、喷涂电流180 A、喷涂距离150 mm、喷涂气压0.7 MPa时,Zn-Al合金涂层组织呈现出典型的网络框架结构,其结合强度为32.5 MPa,孔隙率为2.1%,显微硬度为49.45HV0.05,具有较好综合性能。
The Zn-Al alloy coating was prepared on the surface of 16MnR steel by high speed arc spraying technique. The influence of spraying process parameters on the bonding strength, porosity and microhardness of the coating was studied by orthogonal test. The results showed that the most significant factor affecting the bonding strength of the coating was the spraying pressure. The most significant factor affecting the porosity of the coating was the spraying voltage. The most significant factor affecting the coating microhardness was the spraying distance. The optimum technological parameters were the coating network voltage of 30 V, spraying current of 180 A, spray distance of 150 mm and spraying pressure of 0.7 MPa. The microstructure of Zn-Al alloy coating showed a typical network framework with a bonding strength of 32.5 MPa and porosity 2.1%, microhardness of 49.45HV0.05, with good overall performance.