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鎳基合金028時(shí)效析出規(guī)律及轉(zhuǎn)變動(dòng)力學(xué)
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國(guó)家高技術(shù)研究發(fā)展計(jì)劃資助項(xiàng)目 (2013AA031005)


Aging Precipitation Law and Transformation Kinetics of Nickel Base Alloy 028
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    摘要:

    通過掃描電鏡、X射線衍射和硬度測(cè)試分析研究了028合金在不同的時(shí)效溫度和時(shí)效時(shí)間下的析出相的演變規(guī)律，對(duì)析出相的化學(xué)成分、結(jié)構(gòu)和硬度進(jìn)行了分析，并對(duì)其轉(zhuǎn)變動(dòng)力學(xué)和析出相的長(zhǎng)大進(jìn)行了分析。結(jié)果表明，028合金隨時(shí)效溫度的升高和時(shí)間的延長(zhǎng)，析出相的數(shù)量增多、尺寸增大，合金的硬度升高，晶界和晶內(nèi)析出相主要是含Cr、Mo、Fe、Ni元素的σ相。利用Avrami方程推導(dǎo)出028合金在不同溫度下的轉(zhuǎn)變動(dòng)力學(xué)方程，繪制出動(dòng)力學(xué)曲線，并對(duì)析出相的一維長(zhǎng)大情況進(jìn)行了計(jì)算，得出其一維長(zhǎng)大方程

    Abstract:

    The evolution law of precipitated phase in 028 alloy was studied at different aging temperatures and for different aging time by scanning electron microscope, X-ray diffraction and hardness test. The chemical compositions, structure and hardness of the precipitated phase was analyzed, and the transformation kinetics and the growth of precipitated phase was analyzed as well. The results show that with the aging temperature increasing and the extension of time, the amount and size of precipitated phase of 028 alloy increase, and the hardness rises. Precipitate phase in grain boundaries and intragranular is mainly σ phase containing Cr, Mo, Fe and Ni elements. The transformation kinetics equation of 028 alloy at different temperatures was deduced using Avrami equation, the kinetics curve was drawn and one-dimensional growing up situation of precipitated phase was calculated, and finally the one-dimensional growth equation was obtained.

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孟凡國(guó),董建新,張麥倉,姚志浩.鎳基合金028時(shí)效析出規(guī)律及轉(zhuǎn)變動(dòng)力學(xué)[J].稀有金屬材料與工程,2015,44(10):2501~2508.[Meng Fanguo, Dong Jianxin, Zhang Maicang, Yao Zhihao. Aging Precipitation Law and Transformation Kinetics of Nickel Base Alloy 028[J]. Rare Metal Materials and Engineering,2015,44(10):2501~2508.]
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  • 收稿日期:2014-10-20
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  • 在線發(fā)布日期: 2016-07-13
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