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AZ31鎂合金板材軋制邊裂深度預判模型研究
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太原科技大學重型機械教育部工程研究中心,太原科技大學重型機械教育部工程研究中心,太原科技大學重型機械教育部工程研究中心,太原科技大學重型機械教育部工程研究中心,太原科技大學重型機械教育部工程研究中心,太原科技大學重型機械教育部工程研究中心

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國家自然科學基金青年項目(51501122),山西省科技創(chuàng)新項目(2015172),太原科技大學校博士科研啟動基金(20142033),晉城市科技計劃項目(201502001-1),太原科技大學研究生創(chuàng)新項目(20151020)


Study on Prediction Model of Edge Crack Depth of Rolled AZ31 Magnesium Alloy Sheet
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Heavy Machinery Engineering Research Center of Education Ministry,Taiyuan University of Science and Technology,Heavy Machinery Engineering Research Center of Education Ministry,Taiyuan University of Science and Technology,Heavy Machinery Engineering Research Center of Education Ministry,Taiyuan University of Science and Technology,Heavy Machinery Engineering Research Center of Education Ministry,Taiyuan University of Science and Technology,Heavy Machinery Engineering Research Center of Education Ministry,Taiyuan University of Science and Technology,Heavy Machinery Engineering Research Center of Education Ministry,Taiyuan University of Science and Technology

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    摘要:

    本研究在400℃溫度下，分別以壓下量10%，15%，20%，25%，30%，35%，40%和45%對初始厚度為7mm的AZ31鎂合金板材進行了軋制過程數(shù)值模擬以及實驗驗證研究，并觀察軋制后的顯微組織。研究結果表明，在當前軋制條件下，當單道次壓下量達到20%時，板材邊部將有裂紋萌生，并且邊部裂紋深度隨著壓下量的增大而不斷增大，由20%時5240μm的邊部裂紋深度增加到壓下量45%的14056μm；根據(jù)數(shù)值模擬結果，得到了沿板寬方向的損傷值分布情況，建立了邊部裂紋深度預判模型；對于裂紋深度，軋制實驗實測值和所建立的裂紋深度預判模型的計算值之間的平均誤差為9.23%; SEM觀察結果表明邊部裂紋附近的顯微組織中含有大量孿晶。

    Abstract:

    In this study, the numerical simulation of rolling process and experimental verification was carried out at 400℃ temperature of as-cast the AZ31 magnesium alloy sheet with initial thickness of 7mm. The reduction was 10%, 15%, 20%, 25%, 30%, 35%, 40% and 45%, respectively. Microstructure and edge crack were analyzed after rolling. The results show that the edge crack was occurred when the single pass reduction up to 20%. The edge crack depth has increased from 5.04mm of 20% reduction to 14.05mm of 45% in current rolling condition. According to numerical simulation results, the damage distribution along the width of the plate was obtained. And we have established the prediction model of edge crack depth. For the edge crack depth, the average error between the actual measured data and the calculated value by the prediction model is 9.23%. The SEM observation results show that the microstructure near the edge crack contain a large number of twins.

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黃慶學,韋建春,黃志權,馬立峰,朱艷春,吳冬祖. AZ31鎂合金板材軋制邊裂深度預判模型研究[J].稀有金屬材料與工程,2018,47(6):1926~1930.[Huang Qingxue, Wei Jianchun, Huang Zhiquan, Ma Lifeng, Zhu Yanchun, Wu Dongzu. Study on Prediction Model of Edge Crack Depth of Rolled AZ31 Magnesium Alloy Sheet[J]. Rare Metal Materials and Engineering,2018,47(6):1926~1930.]
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  • 收稿日期:2016-05-25
  • 最后修改日期:2016-07-02
  • 錄用日期:2016-07-15
  • 在線發(fā)布日期: 2018-09-06
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