AZ80镁合金车轮热旋压性能研究

发布时间：2018-02-04 12:58

本文关键词： 镁合金车轮旋压裂纹　出处：《热加工工艺》2017年01期 　论文类型：期刊论文

【摘要】：对AZ80镁合金锻坯热旋压性能进行了研究。结果表明:AZ80镁合金的热旋压性能差,强旋时在轮辋内侧易出现圆周方向裂纹;旋压过程中轮辋外侧的大应变速率及大变形量导致轮辋外壁萌生微裂纹;材料的变形程度决定了晶粒的细化程度,沿着轮辋壁厚方向由外至内晶粒的细化程度递减,外壁为2~5μm的等轴晶粒,内侧晶粒尺寸为80~120μm,外壁的强度及塑性均好于内侧,在较大拉应力作用下内表皮产生圆周方向裂纹。
[Abstract]:The hot spinning properties of AZ80 magnesium alloy forging billet were studied. The results showed that the hot spinning property of the AZ80 magnesium alloy was poor, and the circumferential crack appeared easily on the inner side of the rim during strong rotation. The high strain rate and large amount of deformation on the outside of the rim lead to the initiation of micro-cracks in the outer wall of the rim during spinning. The grain refinement degree is determined by the deformation degree of the material. Along the direction of the rim wall thickness, the grain refinement degree decreases from outside to inside. The outer wall is an equiaxed grain of 2 ~ 5 渭 m and the inner grain size is 80 ~ 120 渭 m. The strength and plasticity of the outer wall are better than that of the inner wall, and the inner epidermis produces circumferential cracks under the action of large tensile stress.
【作者单位】：秦皇岛燕大现代集成制造技术开发有限公司;秦皇岛戴卡兴龙轮毂有限公司;燕山大学机械学院;
【分类号】：TG306
【正文快照】： 镁及其合金是公认的绿色环保型的可持续发展材料,具有密度低、比强度高、阻尼性能优越、吸震性能优越等优点,镁合金车轮相比铝合金车轮减重1/3,节能效果显著,符合目前全球节能、减排、资源再生利用与清洁生产等环保要求,铸造镁合金车轮虽然具有生产成本低的优点,但铸造工艺易

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