<th id="5nh9l"></th><strike id="5nh9l"></strike><th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th><strike id="5nh9l"></strike>
<progress id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"><noframes id="5nh9l">
<th id="5nh9l"></th> <strike id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span>
<progress id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span><strike id="5nh9l"><noframes id="5nh9l"><strike id="5nh9l"></strike>
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"></span><span id="5nh9l"><video id="5nh9l"></video></span>
<th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th>
<progress id="5nh9l"><noframes id="5nh9l">

熱等靜壓FGH95合金組織結構的研究

Microstructure Study on HIPed FGH95 Superalloy

  • 摘要: 國外應用Rene'95粉末高溫合金已有10余年歷史。本文研究在不同溫度熱等靜壓和熱處理之后FGH95合金的顯微組織結構。應用俄歇電子能譜和X-線電子能譜分析儀研究顆粒表面偏析和表面組織結構。采用光學顯微鏡、掃描電鏡、透射電源觀察熱等靜壓之后合金顯微組織結大構的變化,特別用掃描透射電鏡詳細觀察萃取復型組織和金屬薄模樣品。證明當粉末在高于1053℃熱等靜壓時,MC碳化物沿原始顆粒邊界離散地析出,并且碳化物顆粒的間距遠大于碳化物尺寸。時效熱處理后,沿原始顆粒邊界的多數MC碳化物轉變成沿原始顆粒邊界半連續分布的薄膜狀M23C6型碳化物。發現γ'相的溶解溫度與熱等靜壓壓力有關。俄歇能譜和X-線電子能譜分析結果表明:在粉末顆粒表面存在氧、碳、鉻、鈦和硫等元素的偏析,以及顆粒表面部分被氧化。

     

    Abstract: FOH95 alloy has been put into use for more than ten years.The present work has studied the microstructure of FGH95 alloy after HIPing and heat treatment at different temperatures. The particle surface segregation and surface structure were investigated by using AES and ESCA. The changes of all-microstructure during HIPing were investigated by microscope, SEM, TEM and particularly by a detailed observationof STEM on extraction replica and metallic thin foils. It wss evidenced that when the powder was HIPed at above 1050℃ MC carbides precipitated discretely at ppb, and the space between two particles is much greater than the size of these carbides. After aging treatment a lot of MC carbides precipitated at ppb would be converted to film like M23C6 carbides, which is semi-continuously distributed at the ppb.The solvus temperature of γ'-phase was found to be affected by the HIPing pressure.The results of AES and ESCA analysis showed that there were segregation elements such as O, C, Cr, Ti and S on the powder particle surface, and that the particle surfaces were partialy oxidized.

     

/

返回文章
返回
<th id="5nh9l"></th><strike id="5nh9l"></strike><th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th><strike id="5nh9l"></strike>
<progress id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"><noframes id="5nh9l">
<th id="5nh9l"></th> <strike id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span>
<progress id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"><noframes id="5nh9l"><span id="5nh9l"></span><strike id="5nh9l"><noframes id="5nh9l"><strike id="5nh9l"></strike>
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"><noframes id="5nh9l">
<span id="5nh9l"></span><span id="5nh9l"><video id="5nh9l"></video></span>
<th id="5nh9l"><noframes id="5nh9l"><th id="5nh9l"></th>
<progress id="5nh9l"><noframes id="5nh9l">
259luxu-164