Transactions of Materials and Heat Treatment

Title：Simulation analysis on thin sheet of magnesium alloy AZ31B in the extrusion process

Authors： Sun Dehe1 2 Wang Liwei1 2 Xie Wenke1 2

Unit： 1. Technology Center Taiyuan Heavy Industry Co. Ltd. Taiyuan 030024 China 2. Technology Center TZ (Tianjin) Binhai Heavy Machinery Co. Ltd. Tianjin 300452 China

KeyWords： magnesium alloy AZ31B sheet forming extrusion simulation

ClassificationCode：

year,vol(issue):pagenumber：2016,41(1):61-66

Abstract：

It is difficult to control technological parameter of magnesium alloy in extrusion. The reasonable matching between extrusion temperature and speed is crucial to the success of extrusion forming. For magnesium alloy AZ31B sheet with width 700 mm and thickness 4 mm, the extrusion process was simulated by Forge software and fracture criterion of Normalized Crockroft & Latham. The results show that, at early stage, the metal located in the upper and lower parts of ingot flows towards the core, meanwhile, the metal located in the left side and right side keeps flowing along the same direction as that of the extrusion speed; at middle and later stage, the metal located in the direction of ±45° flows apart, one part merging with upper and lower metal keeps flowing towards the core, the other part merging with left side and right side metal extends along the width direction of thin sheet. With the increase of extrusion stroke, the length of formed thin sheet increases, and the local high temperature region transfers from both sides to the center section of thin sheet. When the initial extrusion temperature is 400 ℃, the extrusion speed exceeds 1 mm·s-1, and the local high temperature region of thin sheet has a higher temperature. Furthermore, the forming quality and service performance are not easy to be guaranteed. The application of an initial extrusion temperature 380～400 ℃ and an extrusion speed 0.2 mm·s-1 will save the equipment costs significantly, and guarantee the service performance of thin sheet.

Funds：

山西省科技创新项目(2013101012)

孙德河(1982-)，男，硕士，工程师

Reference：

[1]王向东，张宝红，张治民.AZ31B镁合金正挤压成形工艺研究 [J].机械工程与自动化，2007，（4）：81-83.

Wang X D，Zhang B H，Zhang Z M.Research on forward extrusion technology of AZ31B magnesium alloy [J].Mechanical Engineering & Automation，2007，（4）：81-83.

[2]孙颖迪，陈秋荣.AZ31镁合金电池筒反挤压工艺仿真研究[J].锻压技术，2015，40（3）：46-52.

Sun Y D，Chen Q R. Numerical study of backward extrusion process for AZ31 magnesium [J].Forging & Stamping Technology，2015，40（3）：46-52.

[3]罗仁平，黄雷，戴儇，等.镁合金AZ31B板材温成形流变规律及本构模型 [J].塑性工程学报，2015，22（1）：82-87.

Luo R P，Huang L，Dai X，et al.Flow law and constitutive model of AZ31B magnesium alloy sheet in warm forming [J].Journal of Plasticity Engineering，2015，22（1）：82-87.

[4]马立峰，庞志宁，马自勇，等.AZ31B宽幅镁合金铸轧板材热轧边裂原因分析 [J].材料科学与工程学报，2014，32（5）：665-670.

Ma L F，Pang Z N，Ma Z Y，et al.Analysis of hot rolled cracks of casting AZ31B magnesium alloy plate [J].Journal of Materials Science & Engineering，2014，32（5）：665-670.

[5]任国成.AZ31镁合金ECAP挤压过程塑性变形与组织演变规律的研究[D].济南:山东大学，2013.

Ren G C.Plastic Deformation and Microstructure Evolution Investigation of AZ31 Magnesium Alloy During ECAP Process [D].Jinan：Shandong University，2013.

[6]马磊娟，王磊.基于Gleeble-1500热模拟试验机的镁合金AZ31B塑性变形研究 [J].铸造技术，2013，34（12）：1640-1642.

Ma L J，Wang L.Research of plastic deformation of AZ31B magnesium alloy based on fuzzy PID control [J].Foundry Technology，2013，34（12）：1640-1642.

[7]杨东峰，赵长财，郝海滨. AZ31B镁合金薄板的单向拉伸行为实验研究 [J].锻压技术，2012，37（4）：140-144.

Yang D F，Zhao C C，Hao H B.Experimental research on uniaxial tensile behavior of AZ31B magnesium alloy thin sheet [J].Forging & Stamping Technology，2012，37（4）：140-144.

[8]陈拂晓，郭云汉，郭俊卿，等. AZ31B镁合金热压缩力学行为与本构方程建立[J].锻压技术，2011，36（5）：145-148.

Chen F X，Guo Y H，Guo J Q，et al.Mechanics behavior and constitutive equation of AZ31B magnesium alloy at hot compression[J].Forging & Stamping Technology，2011，36（5）：145-148.

[9]张先宏，崔振山，阮雪榆.镁合金塑性成形技术——AZ31B成形性能及流变应力 [J].上海交通大学学报，2003，37（12）：1874-1877.

Zhang X H，Cui Z S，Ruan X Y.Warm forging of magnesium alloys：the formability and flow stress of AZ31B [J]］.Journal of Shanghai Jiaotong University，2003，37（12）：1874-1877.

[10]尉北玲，黄张洪.大规格AZ31B镁合金板材开发[J].热加工工艺，2014，43（20）：182-184.

Wei B L，Huang Z H.Development of large size AZ31B magnesium alloy plate [J].Hot Working Technology，2014，43（20）：182-184.

[11]黄光胜，汪凌云，范永革.AZ31B镁合金挤压工艺研究 [J].金属成形工艺，2002，20（5）：11-14.

Huang G S， Wang L Y，Fan Y G. Research on the extrusion process of AZ31B magnesium alloy
［J］.Metal Forming Technology，2002，20（5）：11-14.

[12]蔡薇，柳瑞清，饶克，等.镁合金AZ31B挤压成形工艺及模具研究 [J].热加工工艺，2006，35（13）：45-47.

Cai W， Liu R Q，Rao K，et al.Extruding technology and dies research of AZ31B Mg-alloy [J].Hot Working Technology，2006，35（13）：45-47.

[13]Lapovok R Y，Barnett M R，Davies C H J.Construction of extrusion limit diagram for AZ31 magnesium alloy by FE simulation [J].Journal of Materials Processing Technology，2004，146（3）：408.

[14]石如磐，王丽薇.扁挤压筒在36 MN镁挤压机上的应用 [J].锻压技术，2012，37（2）：122-124.

Shi R P， Wang L W.Application of flat extrusion container in 36 MN magnesium extrusion press [J].Forging & Stamping Technology，2012，37（2）：122-124.

Service：

【This site has not yet opened Download Service】【Add Favorite】