摘要
采用电弧喷涂方法在Q235钢基体上喷涂铝涂层,并用正交设计的方法对工艺参数进行了优化。确定优化后的最优工艺参数为:喷涂电流150A,喷涂电压32V,雾化空气压力0.6MPa,喷涂距离150mm。试验结果表明:采用优化后的最优工艺参数进行喷涂,所得孔隙率比优化前降低了9.88%,而结合强度比优化前提高了2.30%,其主要原因是采用了较大的电弧功率为粒子重新融合创造了条件。喷涂电压和喷涂电流对提高电弧功率所起的作用不同,提高喷涂电流比提高喷涂电压对改善涂层质量更有效。
Aluminum coatings were sprayed onto the substrate of steel Q235 by are spraying method and the processing parameters were optimized by orthogonal experimental design. The optimized processing parameters were： spray current 150A, spray voltage 32V, atomizing air pressure 0. 6MPa, and spray distance 150mm. The results showed that there were 9.88% decrease in coating porosity and 2.30% increase in bond strength after optimization. The prime reason was that large electric arc power was favorable to the interfusion of aluminum particles. Spray current and spray voltage had different effects on the increase of arc power. Increase of spray current improved the quality of coatings more effectively than spray voltage.
出处
《新技术新工艺》
2006年第2期92-94,共3页
New Technology & New Process
关键词
电弧喷涂
铝涂层
正交设计
结合强度
涂层孔隙率
arc spraying, aluminum coating, orthogonal design, bond strength, coating porosity
