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碳化物分布狀態(tài)對Ti-25V-15Cr-2Al-0．2C-x合金微觀組織的影響
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TG146.23

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中英國際合作項(xiàng)目(2000-2002)


Effect of the Distribution State of Carbide on Microstructure of Ti-25V-15Cr-2Al-0.2C-x Alloys
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    摘要:

    碳化物和α相是Ti-25V-15Cr-2Al-0．2C-x（x=0.2%Mo,2%Nb等）阻燃β鈦合金基體上的2種主要析出相。采用OM，SEM，TEM等方法研究了具有不同碳化物分布狀態(tài)的Ti-25V-15Cr-2Al-0．2C-x合金的熱處理及熱暴露后的微觀組織。結(jié)果表明，細(xì)小、彌散分布的碳化物顆粒不僅能細(xì)化合金的β晶粒，而且能明顯抑制對合金組織穩(wěn)定性有害的α沉淀相的析出，碳化物顆粒越細(xì)小、彌散，抑制α相析出的作用就越強(qiáng)，合金的組織穩(wěn)定性也越高。

    Abstract:

    Carbide and phase are two main precipitation phases in the matrix of Ti-25V-15Cr-2Al-0.2C-x(x=0, 2%Mo, 2%Nb, etc) non-burning titanium alloys. The heat treatment and thermal exposure microstructure of the alloys with different distribution state of carbide has been investigated using optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). The results show that carbide particles with smaller sizes and higher dispersity can not only refine the microstructure of the alloys, but also significantly suppress the formation of precipitates which are detrimental to the microstructural stability of the alloys. The smaller the size and the more uniform the distribution of carbide, the stronger the effect of suppressing precipitatesthus the better microstructural stability of the alloys will be obtained.

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雷力明 黃旭 孫福生 D. Rugg W. Voice 曹春曉.碳化物分布狀態(tài)對Ti-25V-15Cr-2Al-0．2C-x合金微觀組織的影響[J].稀有金屬材料與工程,2004,33(6):632~634.[Lei Liming, Huang Xu, Sun Fusheng, D. Rugg, W. Voice, Cao Chunxiao. Effect of the Distribution State of Carbide on Microstructure of Ti-25V-15Cr-2Al-0.2C-x Alloys[J]. Rare Metal Materials and Engineering,2004,33(6):632~634.]
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  • 最后修改日期:2002-11-18
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