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鎂合金雙向擠壓-螺旋變形的數(shù)值模擬與實(shí)驗(yàn)研究
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湖南科技大學(xué)

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國(guó)家自然科學(xué)基金資助項(xiàng)目(51505143); 湖南省自然科學(xué)基金資助項(xiàng)目(14JJ3111); 湖南省教育廳項(xiàng)目(14C0455); 中國(guó)博士后科學(xué)基金(2014M562128)


Numerical simulation and experimental research of AZ31 Mg alloys processed by dual-directional extrusion and spiral compound deformation
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    摘要:

    利用雙向擠壓與螺旋變形的特性，本文提出鎂合金雙向擠壓-螺旋復(fù)合變形的新方法。采用 DEFORM-3D軟件模擬分析螺旋角度和凹槽半徑對(duì)坯料變形過(guò)程中累積應(yīng)變的影響，得出合適的結(jié)構(gòu)參數(shù)并加工制造出模具進(jìn)行實(shí)驗(yàn)研究。研究結(jié)果表明：雙向擠壓-螺旋復(fù)合變形可極大地提高鎂合金變形過(guò)程的等效應(yīng)變，隨著螺旋角度和凹槽半徑的增大，等效應(yīng)變值也相應(yīng)的增大，但不均勻程度有所變大。模具螺旋角為40°和凹槽半徑為0.8mm時(shí)，試樣可獲得良好的等效應(yīng)變值和均勻的等效應(yīng)變分布，晶粒組織顯著細(xì)化。

    Abstract:

    Using the characteristics of dual-directional extrusion and sprial deformation, a new extrusion technique of dual-directional extrusion and sprial compound deformation was proposed. Effect of sprial angle and groove radius on the accumulated strain of the deformed billet was analyzed by using DEFORM-3D software, the proper structure parameters were obtained, and the actual die was manufactured for experimental research. The research results show that the dual-directional extrusion and sprial compound deformation can greatly improve the effective strain of magnesium alloy, with the increase of sprial Angle and groove radius, the effective strain value is increased accordingly, however, the degree of strain inhomogeneity grows. Spiral angle of 40 ° and groove radius of 0.8 mm can obtain superior equivalent strain value and uniform equivalent strain distribution, and grain structure is refined dramatically.

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盧立偉.鎂合金雙向擠壓-螺旋變形的數(shù)值模擬與實(shí)驗(yàn)研究[J].稀有金屬材料與工程,2016,45(6):1467~1472.[luliwei. Numerical simulation and experimental research of AZ31 Mg alloys processed by dual-directional extrusion and spiral compound deformation[J]. Rare Metal Materials and Engineering,2016,45(6):1467~1472.]
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  • 收稿日期:2015-09-07
  • 最后修改日期:2015-10-11
  • 錄用日期:2015-11-18
  • 在線發(fā)布日期: 2016-10-08
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