Fine grain cast IN718 compressor blade form abroad has been analyzed.

解剖、分析了国外细晶铸造IN718压气机叶片。

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Forming method of fine grain, processing parameters of casting fine grain blade, and grain size scale of K418 alloy were investigated. The principle of forming fine grain was discussed.

研究了K418合金细晶形成的方法，细晶叶片的铸造工艺参数及其获得的晶粒度等级，并讨论了细晶形成的原理。

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In order to improve the cold fatigue, hot fatigue and mechanical fatigue resisting performance of the moving blade, grain refinement is required for the casting surface.

为了提高动叶片的抗冷热疲劳和抗机械疲劳的性能，铸件表面需进行晶粒细化。

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The engine had been running at high temperatures for four times longer than a normal F-35 flight, causing a separation of the "grain boundary" on one blade, Mr Bates explained.

BBC: Grounded US F-35 fighter jet fleet to resume flights