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哈氏合金X電子束表面處理微觀組織研究
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1.中國民航大學(xué) 天津市民用航空器適航與維修重點(diǎn)實(shí)驗(yàn)室;2.中國民航大學(xué)

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中央高?；究蒲袠I(yè)務(wù)費(fèi)專項資金項目(項目號3122016L014)


Study on Microstructure of Hastelloy X Modified by High-Current Pulsed Electron Beam
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1.Tianjin Key Laboratory of Civil Aircraft Airworthiness and Maintenance;2.Civil Aviation University of China

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    摘要:

    哈氏合金因其優(yōu)良性能被廣泛應(yīng)用于航空工業(yè),利用強(qiáng)流脈沖電子束(HCPEB)轟擊哈氏合金X表面對其進(jìn)行改性,并對其顯微組織進(jìn)行分析和討論。利用掃描電子顯微鏡(SEM)觀察腐蝕后試樣,利用電子背散射衍射(EBSD)觀察未腐蝕試樣。結(jié)果表明：從掃描電鏡照片可以看到,未轟擊試樣晶界被腐蝕,轟擊后試樣表面存在約為2μm的重熔層,腐蝕程度減輕,晶界處出現(xiàn)顆粒狀碳化物；從EBSD結(jié)果可知,轟擊5次試樣晶粒尺寸最小,轟擊5次和10次試樣晶粒取向性更好,多為[101]和[110]。實(shí)驗(yàn)表明強(qiáng)流脈沖電子束轟擊能夠使哈氏合金X表面出現(xiàn)重熔層,并改變其晶粒大小和晶體取向。

    Abstract:

    Hastelloy is widely used in the aerospace industry for its excellent performance. Hastelloy X surface is modified by high-current pulsed electron beam (HCPEB) bombardment and its microstructure is analyzed and discussed. The sample after corrosion was observed by a scanning electron microscope (SEM), and the unetched sample was observed by electron backscattered diffraction (EBSD). The results show: The grain boundary of the untreated sample was corroded from the SEM micro-morphology. After the bombardment, there was a remelted layer of about 2μm on the surface of the sample. The sample possessed good corrosion resistance and granular carbides appeared at the grain boundary; It can be seen that the grain size of the sample was the smallest in 5 times of bombardment, and the grain orientation of the sample is better in 5 and 10 times of bombardment, mostly [101] and [110]. Experiments show that high-current pulsed electron beam bombardment can cause the remelted layer on the surface of Hastelloy X and change its grain size and crystal orientation.

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鄒慧,唐曉薇.哈氏合金X電子束表面處理微觀組織研究[J].稀有金屬材料與工程,2020,49(8):2718~2723.[Zou Hui, Tang Xiaowei. Study on Microstructure of Hastelloy X Modified by High-Current Pulsed Electron Beam[J]. Rare Metal Materials and Engineering,2020,49(8):2718~2723.]
DOI：10.12442/j. issn.1002-185X.20190582

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  • 收稿日期:2019-07-11
  • 最后修改日期:2019-12-11
  • 錄用日期:2019-12-11
  • 在線發(fā)布日期: 2020-09-27
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