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真空感應(yīng)重熔GH3625合金純凈化研究
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蘭州理工大學(xué)省部共建有色金屬先進(jìn)加工與再利用國家重點(diǎn)實(shí)驗(yàn)室,蘭州理工大學(xué)省部共建有色金屬先進(jìn)加工與再利用國家重點(diǎn)實(shí)驗(yàn)室

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TF 133+.2

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甘肅省重大科技專項(xiàng)資助項(xiàng)目(145RTSA004)


Investigation of Purification in Alloy GH3625 throughVacuum Induction Remelting
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State Key Laboratory of Adwanced Processing and Recyling of Nonferrous Metals,Lanzhou University of Technology,State Key Laboratory of Adwanced Processing and Recyling of Nonferrous Metals,Lanzhou University of Technology

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    摘要:

    為進(jìn)一步降低GH3625母合金中的氧、氮、硫含量,分別進(jìn)行了高真空不加鈣和高真空向合金熔體加鈣兩種工藝條件下的真空感應(yīng)重熔實(shí)驗(yàn),研究了高真空感應(yīng)重熔精煉對合金成分和去除雜質(zhì)元素氧、氮、硫的作用。結(jié)果表明：高真空感應(yīng)重熔元素?fù)]發(fā)燒損和富化均控制在標(biāo)準(zhǔn)成分范圍；單純高真空感應(yīng)重熔時(shí)，合金中的氧通過C-O反應(yīng)脫除,可脫氧至10ppm,氮分壓降低使氮含量脫至70ppm,但在去硫方面無明顯作用；高真空加0.5%鈣作凈化劑重熔時(shí)，Ca-O反應(yīng)以及Ca與Al2O3坩堝內(nèi)壁反應(yīng),可實(shí)現(xiàn)深度脫氧,通過Ca-S反應(yīng)使合金中硫含量顯著降低,然而氮含量降低程度有限,其含量遠(yuǎn)高于氮在GH3625合金中的溶解度。采用Al2O3坩堝,選擇高真空熔煉工藝及適量鈣的加入,可使氧、氮、硫含量分別降低到6、60、9ppm。

    Abstract:

    For further reduction of oxygen, nitrogen and sulphur contents in master alloy GH3625, two vacuum induction remelting experiments (high vacuum without calcium and high vacuum with addition calcium) were carried out. Alloy composition and purity were investigated. The results show that: under high vacuum induction remelting burning loss and enrichment of alloying elements are all in the range of standard composition; deoxidation is excellent under high vacuum induction remelting, O content is reduced from 17ppm to 10ppm by C-O reaction; but removal of nitrogen and sulphur is not obvious; High vacuum induction remelting with addition Ca using Al2O3 Ca-O and Ca-Al2O3 (the inner wall of crucible) reaction is helpful to deep deoxidation, Ca-S reaction makes S content is greatly reduced, reducing nitrogen content is limited, it is far higher than N solubility in alloy GH3625. In Al2O3 crucible, adopting high vacuum melting technology and proper calcium addition amounts, oxygen, nitrogen and sulphur content could be reduced to 6ppm,60ppm and 9ppm respectively.

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丁雨田,王 偉.真空感應(yīng)重熔GH3625合金純凈化研究[J].稀有金屬材料與工程,2018,47(2):687~691.[Ding Yutian, Wang Wei. Investigation of Purification in Alloy GH3625 throughVacuum Induction Remelting[J]. Rare Metal Materials and Engineering,2018,47(2):687~691.]
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  • 收稿日期:2015-12-24
  • 最后修改日期:2016-03-17
  • 錄用日期:2016-03-29
  • 在線發(fā)布日期: 2018-03-15
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