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690合金平衡相析出規(guī)律的熱力學(xué)數(shù)值模擬
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國(guó)家自然科學(xué)基金 (50831008，51071017，51001011)；教育部博士點(diǎn)新教師基金 (20090006120011)


Thermodynamic Simulation of Precipitating Behaivour of Equilibrium Phases
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    摘要:

    690合金中的相析出規(guī)律直接影響著其晶界應(yīng)力腐蝕抗力。應(yīng)用Thermo-Calc軟件模擬計(jì)算了690合金的成分變化和熱處理溫度對(duì)平衡相析出規(guī)律的影響。結(jié)果表明：C含量明顯影響M23C6的析出規(guī)律，而對(duì)γ′和α-Cr相的影響較??；Cr含量對(duì)M23C6、γ′和α-Cr相的析出規(guī)律都有明顯影響；Fe含量對(duì)相析出規(guī)律影響很小。由此得出結(jié)論：合金固溶溫度應(yīng)在1050 ℃以上，等溫?zé)崽幚頊囟葢?yīng)在700 ℃以上

    Abstract:

    The precipitating behaviours of phases in alloy 690 affect intergranular corrosion resistance significantly. The effects of chemical composition and heat treatment temperature on equilibrium phases in alloy 690 were simulated with Thermo-Calc software. The content of C is found to affect precipitating behaviour of carbide intensively and those of α-Cr and γ′ phases slightly. The content of Cr affects the precipitating behaviour of these phases markedly. The content of Fe has little effect on the precipitating behaviour of equilibrium phases. Solution treatment temperature should be above 1050 ℃, and thermal treatment temperature should be above 700 ℃

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鄭 磊,張麥倉(cāng),董建新.690合金平衡相析出規(guī)律的熱力學(xué)數(shù)值模擬[J].稀有金屬材料與工程,2012,41(6):983~988.[Zheng Lei, Zhang Maicang, Dong Jianxin. Thermodynamic Simulation of Precipitating Behaivour of Equilibrium Phases[J]. Rare Metal Materials and Engineering,2012,41(6):983~988.]
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  • 收稿日期:2011-06-11
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