CAVITATION RESISTANT FLUID IMPELLERS AND METHOD OF MAKING SAME
    94.
    发明授权
    CAVITATION RESISTANT FLUID IMPELLERS AND METHOD OF MAKING SAME 失效
    空化FLUIDUMSCHAUFELRÄDER和方法及其

    公开(公告)号:EP0769077B1

    公开(公告)日:1998-05-20

    申请号:EP95921944.5

    申请日:1995-06-23

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

    Abstract: A fluid impeller for applications requiring superior cavitation erosion resistance. The impeller has a body fabricated from a castable metastable austenitic steel alloy which has a chemical composition in the range according to table (I), the balance comprising iron and impurities. The preferred range is 17.5-18.5 % chromium, 0.5-0.75 % nickel, 0.45-0.55 % 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.

    합금주철 및 그를 이용한 로터리 압축기의 롤링피스톤의 제조방법
    100.
    发明公开
    합금주철 및 그를 이용한 로터리 압축기의 롤링피스톤의 제조방법 有权
    合金铸铁和使用它的滚子活塞的制造方法

    公开(公告)号:KR1020130054102A

    公开(公告)日:2013-05-24

    申请号:KR1020120013480

    申请日:2012-02-09

    Inventor: 박재봉

    Abstract: PURPOSE: An alloy cast iron and a method for manufacturing a rolling piston of a rotary using the same are provided to reduce manufacturing cost with enough mechanical properties by removing or minimizing the content of expensive Ni, Cr, Mo, and others. CONSTITUTION: An alloy cast iron is composed of 3.0-3.5 wt.% of C, 2.2-2.4 wt.% of Si, 0.5-1.0 wt.% of Mn, 0.1-0.3 wt.% of P, 0.06-0.08 wt.% of S, 0.7-1.0 wt.% of Cr, 0.6-1.0 wt.% of Cu, and the rest of Fe and inevitable impurities. The alloy cast iron includes 3-8% of stenadite in volume ratio. The alloy cast iron is heat-treated by quenching and tempering.

    Abstract translation: 目的:提供一种合金铸铁及其制造方法,通过去除或最小化昂贵的Ni,Cr,Mo等的含量,可以获得足够的机械性能来降低制造成本。 构成:合金铸铁由3.0-3.5重量%的C,2.2-2.4重量%的Si,0.5-1.0重量%的Mn,0.1-0.3重量%的P,0.06-0.08重量%组成。 S的%,Cr的0.7-1.0重量%,Cu的0.6-1.0重量%,剩余的Fe和不可避免的杂质。 合金铸铁的体积比为3-8%。 合金铸铁通过淬火回火进行热处理。

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