摘要
采用四因素三水平正交试验方法对爆炸喷涂WC-14Co涂层工艺进行了优化。主要从氧燃比、填枪比、喷涂距离和送粉量四个工艺参数入手,探究了其对涂层孔隙率和显微硬度的影响。结果表明:对WC-14Co涂层来说,填枪比是对孔隙率和显微硬度影响最大的因素。优化后工艺参数为氧燃比1.014、填枪比70%、喷涂距离200mm、送粉量7.8g/min。在此工艺条件下制备的涂层孔隙率为0.12%,显微硬度为1120HV_(0.3)。
The four-factor and three-level orthogonal tests were used to study the process of WC-14Co coating by detonation spraying. The effects of four parameters on the coating porosity and microhardness were investigated, including the ratio of oxygen to fuel, the ratio of filling gun, spraying distance and powder feeding rate. The results show that the ratio of ？lling gun is the most important factor to the porosity and microhardness of WC-14Co coating. The optimized process parameters are the oxygen to fuel ratio 1.014, the ratio of ？lling gun 70%, the spraying distance 200mm, powder feeding rate 7.8g/min. Under this condition, the porosity and microhardness of the coating are 0.12% and 1120HV0.3 respectively.
出处
《热喷涂技术》
2017年第4期24-29,6,共7页
Thermal Spray Technology
