Precision Forging of Casting AZ31 Magnesium Inner Spur-Gear |
| Journal |
Materials Science Forum (Volumes 532 - 533) |
| Volume |
Advances in Materials Manufacturing Science and Technology II |
| Edited by |
Chengyu Jiang, Geng Liu, Dinghua Zhang and Xipeng Xu |
| Pages |
13-16 |
| DOI |
10.4028/www.scientific.net/MSF.532-533.13 |
| Online since |
December, 2006 |
| Authors |
Hong Bo Li,
Mu Huang,
Jun Ting Luo,
Jun Zhao
|
| Keywords |
AZ31 Mg Alloy, Grain Size, Precision Forging, Two-Stage Processing Technology |
| Abstract |
Based on the two-stage forming technology, the casting AZ31 Magnesium alloy bar was
forged into cylindrical straight inner gear between the temperature 250℃-400℃. At 250℃, the teeth
of the inner gear are almost formed. But there are some cyclic cracks on the surface of the sample.
When improving the temperature above 300℃, the surface quality of the sample has greatly
improved. According to the result of this experiment, the best temperature range for forging AZ31
magnesium gear is 280℃ to 380℃.The forming load gradually reduced with the temperature
improved. At 250℃, the forming load is 93t. At the 400℃, the forming load reduces to 80t.The initial
grain size of AZ31 magnesium alloy bar is 22μm. The microstructure evolution during the warm
deformation was observed by optical microscopy (OM). It is demonstrated that the grain refinement
happened during the deformation process. |
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