7C3、M6C和M23C6；M23C6型碳化物主要分布于孿晶與g相晶粒的三叉交界處,與基體g相是立方-立方的取向關系；M6C型碳化物退化分解并原位析出M7C3型碳化物是Co-Cr-W-Ni合金中一種重要的碳化物析出機制。"/>

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Co-Cr-W-Ni合金中碳化物析出機制的研究
作者:
作者單位:

1.北京科技大學材料科學與工程學院;2.鋼鐵研究總院冶金工藝研究所

作者簡介:

通訊作者:

中圖分類號:

TG146.23

基金項目:

國家重點研發(fā)計劃資助(項目號2017YFA0403804)


Study on the Mechanism of Carbide Precipitation in Co-Cr-W-Ni Alloy
Author:
Affiliation:

1.School of Materials Science and Engineering,University of Science and Technology Beijing;2.Metallurgical Technology Institute,Central Iron Steel Research Institute

Fund Project:

National Key R&D Program of China(No.2017YFA0403804)

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    摘要:

    Co-Cr-W-Ni合金中碳化物的類型和析出機制對合金的力學性能影響顯著,因此,本文用XRD、SEM-EBSD和TEM技術研究了Co-Cr-W-Ni合金時效后碳化物的析出類型、分布特征和析出機制。實驗結果表明,Co-Cr-W-Ni合金中碳化物的主要類型為M7C3、M6C和M23C6；M23C6型碳化物主要分布于孿晶與g相晶粒的三叉交界處,與基體g相是立方-立方的取向關系；M6C型碳化物退化分解并原位析出M7C3型碳化物是Co-Cr-W-Ni合金中一種重要的碳化物析出機制。

    Abstract:

    The Type and Precipitation Mechanism of Carbide in Co-Cr-W-Ni Alloy have significant influence on the mechanical properties of alloy.Therefore, the precipitation type, distribution characteristics and precipitation mechanism of carbides after aging of Co-Cr-W-Ni alloy were studied in this work. The ageing samples were observed by XRD, scanning electron microscopy and transmission electron microscopy. The experimental results show that the types of carbides are M7C3, M6C and M23C6. M23C6 carbide preferentially precipitates at grain and twin boundaries with a cube-cube orientation relationship with the matrix. The M7C3 carbide decomposed gradually with the M6C carbide precipitating in situ is an important mechanism of carbide precipitation.

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朱孜毅,孟利,陳冷. Co-Cr-W-Ni合金中碳化物析出機制的研究[J].稀有金屬材料與工程,2019,48(9):2893~2898.[Zhu Ziyi, Meng Li, Chen Leng. Study on the Mechanism of Carbide Precipitation in Co-Cr-W-Ni Alloy[J]. Rare Metal Materials and Engineering,2019,48(9):2893~2898.]
DOI：10.12442/j. issn.1002-185X.20180379

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  • 收稿日期:2018-04-16
  • 最后修改日期:2018-05-14
  • 錄用日期:2018-06-15
  • 在線發(fā)布日期: 2019-10-09
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