A356铸造铝合金车轮轮辐裂纹分析及改进方法  

Crack analysis and modification method of A356 cast aluminum alloy wheel spoke

作　　者：张艳新 阿拉腾 金洪福 王柱兴 吕金旗 ZHANG Yanxin;A Lateng;JIN Hongfu;WANG Zhuxing;LV Jinqi(CITIC Dicastal Co.Ltd.,Qinhuangdao 066000,China)

机构地区：[1]中信戴卡股份有限公司,河北秦皇岛066000

出　　处：《兵器材料科学与工程》2023年第3期134-139,共6页Ordnance Material Science and Engineering

摘　　要：针对轻量化铝合金车轮在径向疲劳试验中的轮辐背腔表面裂纹失效,通过分析轮毂受力,建立力学模型;通过轮辋变形试验,轮辐应变采集试验,采集轮辐受力情况。结果表明:仿真轮辐裂纹处疲劳强度为72 MPa。根据断裂力学得出,过度轻量化导致轮辐横截面积减小,造成应力幅增加,产生轮辐表面裂纹。调整工艺,将轮辐厚度从22.66 mm增至23.06 mm后,增加轮辐横截面积,径向疲劳试验合格。Aiming to solve the crack failure of the spokes of weight reduced aluminum alloy wheel,the mechanical model wasestablished by analyzing the force on the wheel.The force behavior of the spokes was collected through the rim deformation testand the spokes strain collection test.The results show that the fatigue strength at the crack of the simulated spokes is 72 MPa.According to fracture mechanics,it is found that excessive lightweight leads to the reduction in cross-sectional area of thespoke,the increase in stress amplitude,and the generation of cracks on the spoke surface.Increasing the thickness of the spokefrom 22.66 mm to 23.06 mm can increase its cross-sectional area,and the wheel is qualified to withstand the radial fatigue test.

关 键 词：铝合金车轮 轮辐减质量结构 径向疲劳试验 疲劳裂纹 改进方法 

分 类 号：TG292[金属学及工艺—铸造]