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汽轮机叶片钢 | 2012-3-2 10:41:00
汽轮机叶片钢
叶片是汽轮机最重要部件之一,担负着将热能转变为机械能的作用。它在极复杂工况下长期工作(>10万小时)。有动叶片(装在转子上)和静叶片(装在隔板上)之分。短的叶片仅有几厘米长,而大型汽轮机末级叶片可长达100厘米以上。对叶片材料要求:工作温度<400℃时,要求常温和高温瞬时力学性能为主;高压汽轮机某些处于400℃以上工作的叶片更要求持久强度、持久塑性和蠕变强度、蠕变脆性为主。此外,疲劳与腐蚀也是重要的指标。常用叶片材料有:20CrMo、1Cr13、2Cr13、1CrnMoV、1Cr12WMoV、1Cr17Ni2及Ni36W3Ti等。

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