冲击角度与旋转速度对铝冲蚀行为的影响(英文)

Effect of impinging angle and rotating speed on erosion behavior of aluminum

将工业纯铝暴露在一定浓度的泥浆中,样品以不同的角度固定,并在不同速度下旋转,通过质量损失来测量样品的磨损率。结果表明,当冲击角度小于90°时,样品的磨损率随冲击角度的增加而增加。与传统的认识不同,铝的最大磨损率出现在冲击角为90°,而不是出现在冲击角45°。旋转速度的增加将导致磨损率呈指数增加。这一结果与磨损表面的金相分析一致。

Commercial aluminum（grade 1900） in rotary motion was exposed to slurry of sand in water.Samples were mounted at various angles and rotated at different speeds.Wear rate was calculated using mass loss measurement.The results show that wear rates increase with increasing impingement angle up to 90°.Contrary to the conventional understanding of maximum loss of ductile material at about 45° impingement angle,maximum wear rate was observed in case of the aluminum sample fixed at 90°.However,increasing rotation speed of the samples results in exponential increase in wear rate.The findings are substantiated with the metallographic study of worn surface.