超塑性模锻镁合金汽车轮轻量化研究 I. 轮毂工艺和性能研究

he detection and analysis on mechanical performance of wheel hubs of super-plastically mould forged AZ80 Mg alloy were conducted, along with the corrosion fatigue in salt water, saline spray, thermal cycling and steel ball collision tests of wheel hub samples were investigated. It is found that the overall properties of the forged wheel hub are all over those of Al alloy ones, and the coating of Mg alloy wheel hub posses sufficient resistance to low and high temperature, thermal cycling and impacting to hard objects. Small amount production verified that the supper-plastic forming of a single wheel hub needs only 8 minutes, and the large scale production can be started already on good technological base.