Transactions of Materials and Heat Treatment

Title：Numerical simulation and experimental study of needle piercing extrusion of ZK60 magnesium alloy rectangular tube with inner rib

Authors： Ma Jun Liang Shenglong

Unit： Suzhou Institute of Industrial Technology

KeyWords： ZK60 magnesium alloy rectangular tube with inner rib needle piercing extrusion numerical simulation

ClassificationCode：TG376.9

year,vol(issue):pagenumber：2014,39(11):139-144

Abstract：

Based on Deform-3D finite element software, a three-dimensional rigid-plastic finite element model of needle piercing extrusion process was established for ZK60 magnesium alloy rectangular tube with inner rib used in automobile frame, in which a local mesh refinement and adaptive grid technology during the simulation were adopted. The simulation research shows that excessive distortion and folding defects can be avoided effectively, and the stability of the calculation process can be improved. 1000 tons of aluminum alloy press is fit for producing ZK60 magnesium alloy tube. When the extruding time t>10 s, the mean-square deviation of velocity decreases to Fsdv＜2 mm·s-1, so the uniformity of the flow rate is remarkably improved. Furthermore, the temperature of the tube remains stable or increases slightly within the range of 462-484 ℃.The values obtained from extrusion experiment are in good agreement with the simulation results, and the maximum error of extrusion force is 16.4% and the maximum error of tube temperature in the die exit is below 5%.

Funds：

江苏省高校“青蓝工程”项目；省级示范性高职院校建设项目（苏教高（2011）23号）

马俊(1973-)，男，硕士，副教授

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