The effect of scanning pitch of nozzle for a cavitating jet during overlapping peening treatment
The effect of scanning pitch of nozzle for a cavitating jet during overlapping peening treatment
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DOI：
10.1016/j.surfcoat.2012.03.034
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发表时间：
2012-07
影响因子：
5.4
通讯作者：
O. Takakuwa;H. Soyama
中科院分区：
文献类型：
--
作者：
O. Takakuwa;H. Soyama
本文的目的是优化空化射流喷嘴在喷丸过程中的扫描间距。首先从理论上评估了螺距对重叠处理的影响，基于高斯分布估计了射流的侵蚀强度，以便在空化喷丸和清洗等应用中均匀有效地对表面进行处理。在实验上，对不同螺距的喷嘴进行了空化喷丸。当间距为6 mm、8 mm、10 mm或12 mm时，由于处理不均匀，在铝中形成了条纹图案，而当间距为2 mm和4 mm时，图案是均匀的。当螺距为2 mm和4 mm时，空化喷丸引入316L不锈钢的残余压缩应力分别约为380和400 Mpa。不仅从均匀性的角度，而且从有效和高效处理的角度来看，最佳扫描间距被确定为4 mm，因为这需要扫描次数的一半而不是2 mm。
The objective of this paper is to optimize the pitch at which the nozzle of a cavitating jet is scanned during peening. The evaluations of an effect of the pitch on overlapping treatment are done, firstly theoretically, by estimating the aggressive intensity of the jet based on a Gaussian distribution in order to uniformly and effectively treat the surface in applications such as cavitation peening and cleaning. Experimentally, cavitation peening was conducted with the nozzle scanned at various pitches. Striped patterns, due to the non-uniform treatment, were formed in aluminum when pitches of 6, 8, 10 or 12mm were used, whereas with pitches of 2 and 4mm the patterns were uniform. The compressive residual stress introduced into type 316L stainless steel by cavitation peening was approximately 380 and 400MPa for pitches of 2 and 4mm, respectively. From the viewpoint of not only the uniformity but also effective and efficient treatment, the optimum pitch for scanning was determined to be 4mm, since this requires half the number of scans compared to 2mm.