Investigation of Internal Porosity of Argon-Atomised FGH95 Alloy Powders
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摘要: 本文采用測定粉末真密度法、光學顯微鏡定量金相法和圖象分析儀等方法研究了FGH95高溫合金粉末空心度、粉末空心平均尺寸與粉末粒度的關系。
的增大而增研究得出:氬氣霧化FGH95合金粉末中的空心度、空心平均尺寸均隨粉末粒度大。粉末空心的形貌基本上是等軸的、球形的,而且隨粉末粒度的增化而越來越呈規則的球形。
研究表明:用上述3種方法來研究FGH95合金粉末的空心度,粉末真密度法測量值有偏離,但3種方法的測量結果,其變化的趨勢是一致的;用光學顯微鏡定量金相法和圖象分析儀測定粉末空心的平均尺寸,結果一致。
此外,文中還對FGH95合金扮末與Rene'95合金粉末的空心虛、空心平均尺寸進行了比較。Abstract: The percentage of porous particles in argon-atomised FGH95 alloy powder and the relationship between average size of pores and the particles size were studied by real density measureng method, stereological metalography and Image Analyser.
The study was led to the conclusion that as the particles size increases,both the percentage of porous particles and the average size of pores become larger. Most of the pores are equaxial or sphere like.And the larger the particle size is, the more spherical the shapes of the pores are. The internal porosity of FGH95 alloy powder determined by density method deviates a little from that determined by other two methods. The change regularity obtained by the above three methods is the same.The average size of the porosity measured by optical microscope and by Image Analyzer is also the same. -
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