AZ61镁合金半固态触变挤压成形工艺研究
Thixo-extrusion Forming of Semi-solid Magnesium Alloy
周冰锋1,2，闫 洪1
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作者单位：（1.南昌大学 机电工程学院，江西 南昌330031； 2. 江西理工大学 南昌校区，江西 南昌 330013）
中文关键字： 半固态；AZ61合金；触变挤压; 数值模拟
英文关键字： semi-solid; AZ61 alloy; thixo-extrusion; numerical simulation
中文摘要：设计并制造触变挤压模具，进行了高固相率半固态AZ61镁合金触变挤压和常规挤压实验，研究了不同成形工艺参数对变形力的影响。结果表明，在触变挤压变形时，挤压温度越高，变形力越小；挤压速度越快，变形力越大。采用建立的半固态AZ61镁合金的本构关系，对半固态AZ61触变挤压成形进行了数值模拟，通过对触变挤压实验和数值模拟结果的对比可知，二者拟合的较好。
英文摘要：The thixo-extrusion die was designed and made. The influence of different process parameters on the deformation force was studied by thixo-extrusion experiments and routine extrusion experiments on AZ61 alloy. The results show that the thixo-extrusion deformation force decreases with the increase of extrusion temperature; the deformation rate increases with the increase of extrusion force. Using the constitutive relationship of semi-solid AZ61 alloy，the thixo-forming of semi-solid AZ61 alloy were simulated. Contrasted the thixo-extrusion experiment results and the simulation results, it is found that they coincide well.