Study on Semi-solid Preparation Process Optimization of Magnesium Alloy in High Shear Rate

LI Dong-nan; CHEN Ding-gui; WU Shu-sen; LUO Ji-rong

Materials and Mechanical Engineering > 2006 > 30(11): 10-12.

LI Dong-nan, CHEN Ding-gui, WU Shu-sen, LUO Ji-rong. Study on Semi-solid Preparation Process Optimization of Magnesium Alloy in High Shear Rate[J]. Materials and Mechanical Engineering, 2006, 30(11): 10-12.

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Study on Semi-solid Preparation Process Optimization of Magnesium Alloy in High Shear Rate

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Received Date: January 20, 2006

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The semi-solid preparation process optimization of magnesium alloy had been studied by positive alternation method with rheo-diecasting process and twin-screw in high shear rate.The results shows that the solid fraction of semi-solid slurry and the round degree of primary α-phase are intensively influenced by barrel temperature of screw mixer,and the primary grain size is mainly controlled by shear rate of twin-screw.The pertinent processing parameters are summarized as follows:pouring temperature of the Mg melt is 605 ℃;barrel preheating temperature is 575 ℃ and shear rate is 6 830 s-1.The tensile strength,elongation and hardness of semi-solid AZ91D alloy are 216 MPa,2.3％ and 74 HB.
- semi-solid,
- magnesium alloy,
- twin-screw,
- microstructure,
- mechanical property

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