Fundamentals and Applications of Cavitation Peening Comparing with Shot Peening and Laser Peening
Fundamentals and Applications of Cavitation Peening Comparing with Shot Peening and Laser Peening
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DOI：
10.1007/978-981-15-0054-1_9
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发表时间：
2019-09
期刊：
影响因子：
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通讯作者：
H. Soyama
中科院分区：
文献类型：
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作者：
H. Soyama
虽然空化泡破裂引起的冲击对液压机械造成了严重的破坏，但这种冲击可以像喷丸强化一样用于金属材料的机械表面处理。利用空化冲击进行的强化称为“空化强化”。本文介绍了空化强化的概念和关键因素，包括水下水射流产生空化的机理。通过对金属板电弧高度等喷丸强度的测量，论证了空化喷丸与水射流喷丸的区别。为了探讨空化强化、水射流强化、喷丸强化和浸没激光强化对不锈钢疲劳强度提高的区别，进行了平面弯曲疲劳试验。采用不同的强化时间对试样进行强化处理，得出了不同强化时间下的最佳强化时间，并对最佳强化时间下的不锈钢疲劳强度进行了评价。结果表明，空化强化的疲劳强度在n = 107时最高，其次是喷丸强化，其次是浸没激光强化，最后是水射流强化。
Although impact induced by cavitation bubble collapse causes severe damage in hydraulic machineries, the impact can be utilized for the mechanical surface treatment of metallic materials in the same way as shot peening. The peening using cavitation impact is named as “cavitation peening”. In the paper, the concepts and key factors on cavitation peening are presented including mechanism of generation of cavitation by using a submerged water jet. The difference between cavitation peening and water jet peening was also demonstrated by measuring peening intensity such as arc height of metallic plate. In order to discuss the difference between improvement of fatigue strength of stainless steel by cavitation peening, water jet peening, shot peening and submerged laser peening, a plane bending fatigue test was carried out. The specimens were treated at various processing time by each peening method, and the optimum processing time at each peening methods was revealed, then the fatigue strength of stainless steel treated at the optimum processing time was evaluated. It was concluded that the fatigue strength atN= 107of cavitation peening was highest followed by shot peening, submerged laser peening and finally water jet peening.