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AZ31B鎂合金中厚板軋制熱力耦合場(chǎng)數(shù)學(xué)模型
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東北大學(xué) 材料電磁過程研究教育部重點(diǎn)實(shí)驗(yàn)室,太原科技大學(xué)山西省冶金設(shè)備設(shè)計(jì)理論與技術(shù)重點(diǎn)實(shí)驗(yàn)室,太原科技大學(xué)山西省冶金設(shè)備設(shè)計(jì)理論與技術(shù)重點(diǎn)實(shí)驗(yàn)室,太原科技大學(xué)山西省冶金設(shè)備設(shè)計(jì)理論與技術(shù)重點(diǎn)實(shí)驗(yàn)室,太原科技大學(xué)山西省冶金設(shè)備設(shè)計(jì)理論與技術(shù)重點(diǎn)實(shí)驗(yàn)室

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中圖分類號(hào):

TG146.22

基金項(xiàng)目:

國(guó)家自然科學(xué)基金（51105264），山西省高校青年學(xué)術(shù)帶頭人計(jì)劃（TYAL）、山西省科技攻關(guān)（20130321010-03）


Mathematical Model of Coupled Thermal-stress about AZ31B Magnesium Alloy Plate during Hot Rolling
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Key Laboratory of Electromagnetic Processing of Materials, Ministry of Education, Northeastern University,Shanxi Provincial Key Laboratory of Metallurgical Equipment Design and Technology,Taiyuan University of Science and Technology,Shanxi Provincial Key Laboratory of Metallurgical Equipment Design and Technology,Taiyuan University of Science and Technology,Shanxi Provincial Key Laboratory of Metallurgical Equipment Design and Technology,Taiyuan University of Science and Technology,Shanxi Provincial Key Laboratory of Metallurgical Equipment Design and Technology,Taiyuan University of Science and Technology

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    摘要:

    采用Gleeble-1500D熱力模擬實(shí)驗(yàn)機(jī)對(duì)鑄態(tài)AZ31B鎂合金圓柱體進(jìn)行了寬范圍變形條件下的熱壓縮試驗(yàn),擬合熱壓縮實(shí)驗(yàn)數(shù)據(jù),針對(duì)鎂合金應(yīng)變軟化特性建立了一種新的熱力本構(gòu)模型；依托于Deform-3D對(duì)鎂板的實(shí)際熱軋過程進(jìn)行了熱力仿真分析,依據(jù)軋制理論假設(shè)、宏觀連續(xù)介質(zhì)力學(xué)以及熱力學(xué)原理,采用數(shù)學(xué)解析的方法建立了鎂板熱軋制區(qū)域中的應(yīng)變、應(yīng)變速率值分布模型以及三維溫度場(chǎng)、應(yīng)力場(chǎng)數(shù)學(xué)模型。研究結(jié)果表明：新建的熱力本構(gòu)模型預(yù)測(cè)精度較高,預(yù)測(cè)平均相對(duì)誤差為5.1%；建立的軋制變形區(qū)域中的應(yīng)變、應(yīng)變速率值分布模型,溫度場(chǎng)數(shù)學(xué)模型以及熱力耦合場(chǎng)數(shù)學(xué)模型不僅形式簡(jiǎn)單易于生產(chǎn)引用,更能精確表征中厚規(guī)格鎂板熱軋制過程中的熱-力耦合變形機(jī)制。

    Abstract:

    Under a wide range of deformation conditions, hot compression tests of AZ31B magnesium alloy cast cylinder were carried by Gleeble-1500D thermal simulator. According to the strain softening characteristics of magnesium alloy, a new thermal deformation constitutive model was established. Relying on Deform-3D, the coupled thermal-stress simulation of hot rolling process of magnesium plate was analyzed. Based on the rolling theoretical assumptions, macroscopic continuum mechanics and thermodynamics, strain and strain rate value distribution models, three-dimensional temperature field and stress field mathematical models in rolling deformation zone were established by mathematical analysis method. The results showed that the new thermal constitutive model was in a higher accuracy and the average relative error was 5.1%.Strain distribution model, strain rate value distribution model, mathematical model of temperature field and mathematical model of stress field were not only concise in form and easy to be controlled online, but also could accurately characterize thermal-mechanical coupled deformation mechanism of hot rolling of magnesium plate.

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賈偉濤,馬立峰,劉鵬濤,徐海潔,蔣亞平. AZ31B鎂合金中厚板軋制熱力耦合場(chǎng)數(shù)學(xué)模型[J].稀有金屬材料與工程,2016,45(5):1175~1181.[Jia Weitao, Ma Lifeng, Liu Pengtao, Xu Haijie, Jiang Yaping. Mathematical Model of Coupled Thermal-stress about AZ31B Magnesium Alloy Plate during Hot Rolling[J]. Rare Metal Materials and Engineering,2016,45(5):1175~1181.]
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  • 收稿日期:2015-01-30
  • 最后修改日期:2015-08-03
  • 錄用日期:2015-09-07
  • 在線發(fā)布日期: 2016-06-02
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