Transactions of Materials and Heat Treatment

Title：Influence of billet preheating method on microstructure and properties for AZ80 magnesium alloy wheel hub

Authors： Hu Meixie1 Di Shilei2

Unit： 1.Centre for Teacher Development Inner Mongolia Technical Collage of Mechanics and Electrics 2.Inner Mongolia Ordos City Mengtai Aluminium Co. Ltd.

KeyWords： magnesium alloy wheel hub forging homogenization treatment microstructure mechanical properties

ClassificationCode：TG319

year,vol(issue):pagenumber：2022,47(9):39-44

Abstract：

The influences of direct forging and hot forging after 410 ℃/23 h homogenization treatment on the microstructure and properties of wheel hub were studied by means of contrast. The results show that the direct forging after homogenization treatment can improve production efficiency and save energy, the surface quality of wheel hub after forging is better, and there are no forging defects such as surface cracks and folding. However, its mechanical properties are obviously lower than those of the wheel hub after homogenization treatment and hot forging, the grain size is not uniform in the microstructure, the recrystallized grain is small on the grain boundary, and the single-phase solid solution in the grain is relatively coarser. After the homogenization treatment, the microstructure of the forged wheel hub after re-heat treatment at 435 ℃ for 7.5 h before forging is uniform and fine with fine grain boundary and obvious forging texture. The mechanical properties of all parts for the wheel hub are higher than those of the wheel hub that is homogenized treatment and then directly forged, especially, the mechanical properties of rim and spoke are different greatly.

Funds：

胡美些(1977-)，女，硕士，副教授 E-mail：710679063@qq.com

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