摘要
为了进一步优化JP5000超音速火焰喷涂WC-12Co涂层的制备工艺,本文采用四因素三水平正交实验方法研究了喷涂距离、煤油流量、氧气流量和送粉量等四个主要工艺参数对WC-12Co涂层孔隙率和显微硬度的影响。结果表明:煤油流量是影响涂层孔隙率和显微硬度的最显著因素,氧气流量与喷涂距离次之,送粉量的影响较小;本次试验得到的优化工艺参数为喷涂距离380mm、煤油流量22.5L/h、氧气流量2050SCFH、送粉量5.5r/min。在此工艺参数下制备的WC-12Co涂层,其孔隙率为0.33%,显微硬度为1392HV300。
WC-12Co coatings was prepared by high velocity oxygen fuel （HVOF） spraying technology, and orthogonal experiment was designed to analyze the effects of the spray parameters including spray distance, kerosene flow, oxygen flow, and powder feeding rate on the porosity and microhardness of the coating. The results have shown that the kerosene flow is the most significant factor affecting the coating porosity and the microhardness, the oxygen flow rate and spray distance are secondary, and the powder feeding rate is the least. With the optimized parameters where the spray distance is 380mm, the kerosene flow rate is 22.5L/h, the oxygen flow is 2050 SCFH, and the powder feeding rate is 5.5r/min, the porosity of coating is 0.33%, and the microhardness is 1392HV300.
出处
《热喷涂技术》
2013年第2期36-39,47,共5页
Thermal Spray Technology
