公开(公告)号：US5514329A

公开(公告)日：1996-05-07

申请号：US266278

申请日：1994-06-27

Applicant: Colin McCaul ,  Vincenzo Fumagalli

Inventor： Colin McCaul ,  Vincenzo Fumagalli

IPC: C22C38/38 ,  F04D29/22 ,  C22C38/58 ,  C21D6/00

CPC classification number: F04D29/2277 ,  C22C38/38 ,  F05C2201/90

Abstract: A fluid impeller for us in applications requiring superior cavitation erosion resistance. The impeller has a body fabricated from a castable metastable austenitic steel alloy which has a preferred chemical composition in the range of 17.5-18.5% chromium, 0.5-0.75% nickel, 0.45-55% silicon, 0.2-0.25% nitrogen, 15.5-16.0% manganese and 0.1%-0.12% carbon. Quantitative testing has shown cavitation resistance of four to six times that of standard boiler feed pump materials. A method for making cavitation resistant fluid impellers is also disclosed.

Abstract translation: 一种流体叶轮，适用于需要优异的抗气蚀侵蚀性的应用。 叶轮具有由可铸造亚稳态奥氏体钢合金制成的主体，其具有在17.5-18.5％的铬，0.5-0.75％的镍，0.45-55％的硅，0.2-0.25％的氮，15.5-16.0的范围内的优选的化学组成 锰和0.1％-0.12％的碳。 定量试验显示，空化阻力是标准锅炉给水泵材料的四到六倍。 还公开了一种制造抗气蚀的流体叶轮的方法。