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研究射流速度、石英砂浓度和撞击角度对冲蚀和冲蚀-腐蚀后铝黄铜表面粗糙度的影响。冲蚀和冲蚀-腐蚀实验在射流冲击机中进行。采用二维和三维轮廓曲线仪以及扫描电子显微镜表征被侵蚀样品表面。结果表明,在9、6和3 m/s射流速度下,分别增加石英砂浓度至1、5和10 g/L,冲蚀-腐蚀试样表面粗糙度增加;但是,进一步增加石英砂浓度,由于试样表面的加工硬化、反弹或覆盖效应以及高频冲击作用,试样表面粗糙度降低。随着射流速度的增加,试样表面粗糙度增加。研究结果还表明,当射流速度为3和6 m/s时,试样表面粗糙度随撞击角度的变化并不明显;而在较高的射流速度9 m/s时,倾斜撞击造成腐蚀表面形成波痕,因此,具有比正面撞击试样更高的表面粗糙度。
The effects of jet velocity, quartz sand concentration and impact angle on the surface roughness of aluminum brass after erosion and erosion-corrosion were studied. Erosion and erosion - Corrosion experiments were carried out in a jet impactor. Eroded sample surfaces were characterized using two-dimensional and three-dimensional profilometry and scanning electron microscopy. The results show that the surface roughness of the eroded - corroded specimens increases with increasing the concentrations of quartz sand to 1, 5 and 10 g / L at the jet velocities of 9, 6 and 3 m / s, respectively. However, when the concentration of quartz sand is further increased, Due to work-hardening, bouncing or covering effect on the specimen surface and high-frequency impact, the surface roughness of the specimen decreases. As the jet velocity increases, the surface roughness of the specimen increases. The results also show that when the jet velocity is 3 and 6 m / s, the change of the surface roughness of the specimen with the impact angle is not obvious. At the high jet velocity of 9 m / s, the inclined impact causes the corrosion surface to form The ripples therefore have a higher surface roughness than the frontal impact specimen.