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Fe-C-Ta三元系相關(guān)系的實(shí)驗(yàn)測定與熱力學(xué)計(jì)算
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湘潭大學(xué) 材料科學(xué)與工程學(xué)院;湘潭大學(xué) 材料設(shè)計(jì)及制備技術(shù)湖南省重點(diǎn)實(shí)驗(yàn)室,湘潭大學(xué) 材料科學(xué)與工程學(xué)院;湘潭大學(xué) 材料設(shè)計(jì)及制備技術(shù)湖南省重點(diǎn)實(shí)驗(yàn)室,湘潭大學(xué) 材料科學(xué)與工程學(xué)院;湘潭大學(xué) 材料設(shè)計(jì)及制備技術(shù)湖南省重點(diǎn)實(shí)驗(yàn)室,湘潭大學(xué) 材料科學(xué)與工程學(xué)院;湘潭大學(xué) 材料設(shè)計(jì)及制備技術(shù)湖南省重點(diǎn)實(shí)驗(yàn)室

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中圖分類號(hào):

TG113.12

基金項(xiàng)目:

國家自然科學(xué)基金項(xiàng)目（面上項(xiàng)目）


Experimental investigation and Thermodynamic calculation of the Fe-C-Ta system
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School of Materials Science and Engineering, Xiangtan University;Key Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University,School of Materials Science and Engineering, Xiangtan University;Key Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University,School of Materials Science and Engineering, Xiangtan University;Key Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University,School of Materials Science and Engineering, Xiangtan University;Key Laboratory of Materials Design and Preparation Technology of Hunan Province, Xiangtan University

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    摘要:

    采用差熱分析（DTA）測定了Fe-C-Ta三元系中Fe-xC-0.1Ta和Fe-xC-0.5Ta兩個(gè)垂直截面，并選取Fe-2.93C-0.1Ta和Fe-2.31C-0.5Ta兩種合金，對(duì)其相變過程進(jìn)行了分析。利用CALPHAD方法，并結(jié)合實(shí)驗(yàn)數(shù)據(jù)對(duì)該體系的相關(guān)系進(jìn)行了熱力學(xué)優(yōu)化。結(jié)果表明，計(jì)算結(jié)果與實(shí)驗(yàn)結(jié)果符合較好。該體系富鐵角的液相面投影存在四個(gè)四相恒溫反應(yīng)：Liquid bcc ? fcc TaC，Liquid ? bcc Fe2Ta TaC，Liquid ? Fe3C TaC fcc，Liquid Ta2C? TaC Fe2Ta，反應(yīng)溫度分別為1443.26℃、1413.90℃、1122.42℃及1508.64℃。Fe-xC-0.1Ta合金和Fe-xC-0.5Ta合金在726.6℃發(fā)生共析反應(yīng)。

    Abstract:

    Two vertical sections of the Fe-C-Ta system with 0.1wt.%，0.5wt.% ta were experimentally investigated by DTA, and the phase transformation sequences of the alloys Fe-2.93C-0.1Ta and Fe-2.31C-0.5Ta were analyzed. A thermodynamic calculation of this system was carried out using CALPHAD technique. The results show that the thermodynamically calculated results agree well with the experimental data. There are four nonvariant reactions in the liquidus projection of Fe-C-Ta system in the Fe-rich corner: Liquid bcc ?fcc TaC，Liquid ? bcc Fe2Ta TaC，Liquid ? Fe3C TaC fcc，Liquid Ta2C ? TaC Fe2Ta. The temperature of the nonvariant reactions is as following: 1443.26℃, 1413.90 ℃,1122.42 ℃, 1508.64℃.The eutectoid reaction occurred at 726.6℃of the alloys Fe-2.93C-0.1Ta and Fe-2.31C-0.5Ta.

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徐展源,歐陽雪枚,尹付成,李智. Fe-C-Ta三元系相關(guān)系的實(shí)驗(yàn)測定與熱力學(xué)計(jì)算[J].稀有金屬材料與工程,2017,46(1):97~103.[Xu Zhanyuan, OuYang Xuemei, Yin Fucheng, Li Zhi. Experimental investigation and Thermodynamic calculation of the Fe-C-Ta system[J]. Rare Metal Materials and Engineering,2017,46(1):97~103.]
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  • 收稿日期:2014-10-16
  • 最后修改日期:2015-04-16
  • 錄用日期:2015-06-11
  • 在線發(fā)布日期: 2017-03-16
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