本文關(guān)鍵詞：連續(xù)鑄造穩(wěn)態(tài)溫度場非物理邊界條件的確定，由筆耕文化傳播整理發(fā)布。

連續(xù)鑄造穩(wěn)態(tài)溫度場非物理邊界條件的確定

Non-physical Boundary Condition of Steady Temperature Field in Continuous Casting Process

[1] [2]

ZHOU Zhi-min, LU Gui-min （1. School of Sciences, Northeastern University, Shenyang 110004, China; 2 School of Resources ＆ Environmental Engineering, East China University of Sc

[1]東北大學(xué)理學(xué)院,遼寧沈陽110004; [2]華東理工大學(xué)資源與環(huán)境工程學(xué)院,上海200237

文章摘要：建立了描述連續(xù)鑄造過程的溫度場模型，用外推法得出凝固金屬在結(jié)晶器出口側(cè)的非物理邊界條件模型，使穩(wěn)態(tài)溫度場的計(jì)算精確高效．利用該溫度場模型及非物理邊界條件模型計(jì)算了Al-Cu合金在半連續(xù)鑄造過程中的穩(wěn)態(tài)溫度場，，并以此確定的介觀溫度場作為液固相變模擬的條件，用多尺度計(jì)算技術(shù)模擬了Al～10％Cu合金在不同澆注溫度時的凝固組織，得到了晶粒形貌和分布合理的微觀組織．對ZL201合金的近液相線鑄造組織的模擬結(jié)果與實(shí)驗(yàn)吻合．研究表明：該溫度場模型及非物理邊界條件模型適于穩(wěn)態(tài)連續(xù)鑄造過程的模擬，并可為金屬凝固組織的多尺度模擬提供正確的溫度場數(shù)據(jù)．

Abstr：A model of temperature field was developed to describe the continuous casting process. The model of the non-physical boundary condition of temperature field was also proposed by extrapolation technique for the castings out of the mould to get efficient and accurate calculation results of the steady temperature fields. Then, the steady temperature fields of Al-Cu alloys in semi-continuous casting process were calculated using the given models, and the mesoscale temperature field thus determined was taken as the conditions for the simulation of liquid-solid phase transformation. The calculated temperature fields were applied to the multi-scale simulation of the solidification of the Al-10% Cu alloys at different pouring temperatures, thus obtaining the morphology and reasonably distributed grain structure. It was found that the simulated grain size and morphology of near liquidus cast ZL201 alloy is well consistent with experimental results. All the results show that the models developed for temperature field and non-physical boundary condition are applicable to the simulation of steady continuous casting process, especially they can provide correct data of temperature fields as reference for the multi-scale simulation of solidified metal structure.

文章關(guān)鍵詞：

Keyword：:continuous casting semisolid forming model of temperature field boundary condition multi-scale simulation

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課題項(xiàng)目：國家自然科學(xué)基金資助項(xiàng)目（50674032）;教育部新世紀(jì)優(yōu)秀人才支持計(jì)劃項(xiàng)目（NCET-04-0279）.

  本文關(guān)鍵詞：連續(xù)鑄造穩(wěn)態(tài)溫度場非物理邊界條件的確定，由筆耕文化傳播整理發(fā)布。