锻造镁合金轮毂薄弱部位研究及展望

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中图分类号：U466 文献标志码：B DOI：10.19710/J.cnki.1003-8817.20250096

Research and Prospect of Key Parts of Forged Magnesium Alloy Wheels

Xu Hong'， Zhao Miao'， Zhang Tao²， Song Laifu²， Xu Jin'，Gao Yipeng' （1.JilinUniversityangchn35;2.CagcunFawayGouputomobileComponentsCo.，td.WeeBranch，ag ）

Abstract：For the positive andnegativeextrusion of AZ8O magnesium allyforged wheels （hub A/L），the diffrencesinmicrostructureand mechanical propertiesof thekeyareasof spokes，rimsand nut seatsare systematicallyanalyzed，anditisrevealed thattheinsuficientdynamicrerystallzationcausedbyinsuficientplastic straininthenut seatareaisthecore mechanismofthe weak link inmechanics.Thetest resultsshow that the spokesandrimsarefullyrecrystalized，thegrainrefinement issignificant （theaveragegrainsizeis13.8～16.2 μm ） andtheyield strengthis150～239MPa.However，due totheinsuficient deformation，therecrystallzationis incomplete，the grain size is large （about 48μm ，about3 times that of other regions），and there is lamellar segregation of β-Mg17Al12 photos，resultinginayieldstrengthofonly112～144MPa，whichisabout 40% lower than that at the spokes and rims.

Keywords：AZ80 magnesiumalloy，Positiveand negative extrusion，Magnesiumallywheels，Mechanical properties

1前言

汽车轻量化技术作为实现产业绿色转型升级的核心技术路径，已成为我国汽车制造业发展的重要方向。（剩余9196字）