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真空二次還原精煉法制備低氧高鈦鐵合金的研究
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國家自然科學(xué)基金（50874027，50644016，50704011）；國家“973”項(xiàng)目（2007CB613504）；中央高?；究蒲袠I(yè)務(wù)費(fèi)(90402015)


Research on Preparation of High Titanium Ferroalloy with Low Oxygen through Vacuum Secondary Reduction Refining
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    摘要:

    以鋁熱法生產(chǎn)的高鈦鐵為原料，以Al為還原劑進(jìn)行真空還原精煉制備低氧高鈦鐵。研究了精煉溫度、精煉時(shí)間等因素對精煉效果的影響，采用XRD、SEM及化學(xué)元素分析等手段對高鈦鐵合金進(jìn)行了表征。結(jié)果表明：精煉后的高鈦鐵主要含有TiFe2、Fe2TiO5、TiO、Al2O3、TiAl、Fe0.942O等相，精煉后合金的微觀結(jié)構(gòu)均勻致密，夾雜物得到有效去除，氧含量大幅降低。但精煉溫度過高，精煉時(shí)間過長，會(huì)惡化精煉效果。精煉后合金中鈦含量（質(zhì)量分?jǐn)?shù)）為(69.00~71.00)%，鋁含量低于2.50%，硅含量低于2.63%，氧含量低于3.52%，完全符合優(yōu)質(zhì)高鈦鐵的技術(shù)指標(biāo)。

    Abstract:

    The vacuum reduction refining was used to prepare the high titanium ferroalloy with low oxygen, using the high titanium ferroalloy prepared by an aluminum thermal method as raw materials, and Al as the reducing agent. Effects of the refining temperature and time on the refining result were studied, and the high titanium ferroalloy was characterized by XRD, SEM and chemical elemental analysis. The results show that the refined high titanium ferroalloy consists mainly of TiFe2, Fe2TiO5, TiO, Al2O3, TiAl and Fe0.942O phases. The microstructure of the refined alloy is uniform and compact, the inclusions in the alloy are effectively removed and the oxygen content decreases dramatically. However, too high refining temperature and too long refining time will worsen refining effect. The titanium content in the refined alloy is within (69.00-71.00)%, Al content is lower than 2.50%, silicon content is lower than 2.63%, and the oxygen content is lower than 3.52%, which is fully consistent with the technical indicators of the high quality high titanium ferroalloy.

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豆志河,張廷安,姚永林,張含博,張志琦,牛麗萍,赫冀成.真空二次還原精煉法制備低氧高鈦鐵合金的研究[J].稀有金屬材料與工程,2012,41(3):420~425.[Dou Zhihe, Zhang Ting’an, Yao Yonglin, Zhang Hanbo, Zhang Zhiqi, Niu Liping, He Jicheng. Research on Preparation of High Titanium Ferroalloy with Low Oxygen through Vacuum Secondary Reduction Refining[J]. Rare Metal Materials and Engineering,2012,41(3):420~425.]
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  • 收稿日期:2011-03-22
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