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鈦合金冷坩堝連續(xù)熔鑄過程定向凝固
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國家自然科學(xué)基金重大項目（50395102）


Directional Solidification of Titanium Alloys during Continuous Casting with a Cold Crucible
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    摘要:

    水冷銅坩堝存在很強的側(cè)向散熱，而定向凝固則必須保證單向熱流，分別從電磁力、溫度場及傳熱3方面來分析冷坩堝定向凝固的可行性。結(jié)果表明：在三相點焦耳熱最大，感應(yīng)焦耳熱彌補了側(cè)向散熱，保證在下駝峰與坩堝接觸點Z0附近區(qū)域等溫線近乎平直，能夠利用冷坩堝實現(xiàn)鈦合金的定向生長。增大電磁壓力，提高熔體過熱度，可以減小坩堝壁的側(cè)向散熱，有利于冷坩堝實現(xiàn)定向凝固。

    Abstract:

    Unidirectional heat flow is required during directional solidification, so it is very difficult to solidify directionally because of strong side radiation around a water-cold copper crucible. The feasibility of directional solidification with the cold crucible was analyzed by mathematic analysis from electromagnetism, temperature field and heat transfer. Results show that Joule heat is strongest at triple point, and it can counterweigh the side heat dissipation; therefore isotherms approach level near the contact point between the hump and the crucible. Increasing of the electromagnetic force and the degree of superheat of the melt can decrease side radiation of the crucible wall. Consequently it is possible to realize directional solidification with the cold crucible.

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王艷麗,傅恒志.鈦合金冷坩堝連續(xù)熔鑄過程定向凝固[J].稀有金屬材料與工程,2010,39(5):787~790.[Wang Yanli, Fu Hengzhi. Directional Solidification of Titanium Alloys during Continuous Casting with a Cold Crucible[J]. Rare Metal Materials and Engineering,2010,39(5):787~790.]
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  • 收稿日期:2009-05-03
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