AZ31镁合金无缝管挤压动态再结晶数值模拟研究

doi:10.3976/j.issn.1002-4026.2017.05.008

山东科学 ›› 2017, Vol. 30 ›› Issue (5): 45-49.doi: 10.3976/j.issn.1002-4026.2017.05.008

AZ31镁合金无缝管挤压动态再结晶数值模拟研究

庄海华¹，杨柱¹*，刘运腾^1,2，周吉学^1,3，马百常¹，王金伟¹

1.山东省科学院新材料研究所，山东济南 250014；2.山东省轻质高强金属材料省级重点实验室（筹）, 山东省科学院新材料研究所，山东济南 250014；3.山东省汽车轻量化镁合金材料工程技术研究中心, 山东省科学院新材料研究所，山东济南 250014

收稿日期:2017-05-04 出版日期:2017-10-20 发布日期:2017-10-20
通信作者: 杨柱(1990—)，男，硕士，研究方向为镁合金加工。 E-mail:191852811@qq.comAZ31 E-mail:191852811@qq.comAZ31
作者简介:庄海华(1977—)，男，助理工程师，研究方向为镁合金加工。
基金资助:
山东省自然科学基金（ZR2017PEE007）

Numerical simulation study on dynamic recrystallization of AZ31 magnesium alloy during seamless tube extrusion

ZHUANG Hai-hua¹，YANG Zhu¹*，LIU Yun-teng^1,2，ZHOU Ji-xue^1,3, MA Bai-chang¹, WANG Jin-wei¹

1. Advanced Materials Institute，Shandong Academy of Sciences, Jinan 250014, China; 2. Shandong Provincial Key Laboratory of High Strength Lightweight Metallic Materials (in preparation), Advanced Materials Institute ，Shandong Academy of Sciences, Jinan 250014, China; 3. Shandong Engineering Research Center for Lightweight Automobiles Magnesium Alloys, Advanced Materials Institute ，Shandong Academy of Sciences, Jinan 250014, China

Received:2017-05-04 Online:2017-10-20 Published:2017-10-20

摘要/Abstract

摘要：

通过热压缩实验得出温度在300~450 ℃，应变率为0.01~1 s^－1时的应力应变曲线，建立了AZ31镁合金的动态再结晶模型。该模型用于AZ31镁合金无缝管挤压过程中动态再结晶过程的数值模拟，并通过金相观察得以实验验证。结果表明，在挤压速度确定的情况下，挤压温度对动态再结晶分数的影响最为明显。随着挤压温度的升高，动态再结晶体积分数明显增大。预测的动态再结晶体积分数与实验结果吻合。

关键词: AZ31镁合金, 动态再结晶, 数值模拟, 无缝管挤压

Abstract:

Based on the stressstrain curves obtained by hot compression tests at temperature of 300 ~ 450 ℃ and at strain rate of 0.01 ~ 1 s-1, the empirical dynamic recrystallization models for the semicontinuous AZ31 magnesium alloy were developed. The model was applied to the numerical simulation of dynamic recrystallization evolution during seamless tube extrusion of AZ31 magnesium alloy, and was verified by metallographic observation. The results showed that, at certain extrusion speed, the influence of the extruding temperature on the dynamic recrystallization fraction was the most significant. With the increase of the extruding temperature, the volume fraction of dynamic recrystallization increased obviously. The predicted volume fraction of dynamic recrystallization was in excellent agreement with the experimental results.

Key words: AZ31 magnesium alloy, seamless tube extrusion, dynamic recrystallization, numerical simulation

中图分类号:

TG146.2

庄海华，杨柱，刘运腾，周吉学，马百常，王金伟. AZ31镁合金无缝管挤压动态再结晶数值模拟研究[J]. 山东科学, 2017, 30(5): 45-49.

ZHUANG Hai-hua，YANG Zhu，LIU Yun-teng，ZHOU Ji-xue, MA Bai-chang, WANG Jin-wei. Numerical simulation study on dynamic recrystallization of AZ31 magnesium alloy during seamless tube extrusion[J]. SHANDONG SCIENCE, 2017, 30(5): 45-49.

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AZ31镁合金无缝管挤压动态再结晶数值模拟研究

Numerical simulation study on dynamic recrystallization of AZ31 magnesium alloy during seamless tube extrusion

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