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采用涂搪法烧结制备了Q235钢基体3Y-TZP/LZAS微晶玻璃梯度涂层。利用自制的冲蚀磨损试验机,在15°、30°、45°、60°、75°和90°冲蚀角下,控制冲蚀时间,分别对不同层数梯度涂层进行冲蚀,测定体积冲蚀磨损率。通过SEM对冲蚀后的试样表面进行显微结构分析,研究不同冲蚀角度下梯度涂层的冲蚀磨损机制。结果表明:梯度涂层的体积冲蚀磨损率随冲蚀角度增大均呈现出先增大后减小的趋势,并在60°时达到最大值;梯度涂层的抗冲蚀性能随着层数的增加而增强;低角度下的冲蚀机制主要为切削、犁削效应引起的切削磨损,高角度下的冲蚀机制主要为捶击锻打效应引起的脆性断裂,60°冲蚀角下捶击锻打效应和切削、犁削效应都比较强,涂层磨损量最大。
Q235 steel matrix 3Y-TZP / LZAS glass-ceramic gradient coating was prepared by enamelling method. The erosion time was controlled at 15 °, 30 °, 45 °, 60 °, 75 ° and 90 ° erosion angle with a self-made erosion tester. The gradient coatings of different layers were respectively subjected to erosion test. Volume erosion wear rate. The microstructure of the eroded sample surface was analyzed by SEM to study the erosive wear mechanism of the gradient coating under different erosion angles. The results show that the volume erosion wear rate of gradient coating increases first and then decreases with increasing erosion angle and reaches the maximum at 60 °. The erosion resistance of gradient coating increases with the number of layers The erosion mechanism at low angle is mainly caused by cutting and plowing. The erosion mechanism at high angle is mainly brittle fracture caused by hammering and forging effect, and the hammering at 60 ° erosion angle Forging effect and cutting, plow cutting effect is stronger, the maximum amount of coating wear.