理化检验-物理分册2025，Vol.61Issue(8)：75-78,4.DOI:10.11973/lhjy-wl240343
压铸铝合金转向节断裂原因
Reasons for fracture of die cast aluminum alloy steering knuckle
摘要
Abstract
A certain die cast aluminum alloy steering knuckle broke.The reasons for the fracture of the steering knuckle were analyzed using macroscopic observation,chemical composition analysis,industrial computer tomography imaging analysis,scanning electron microscopy and energy spectrum analysis,metallographic examination,mechanical property testing.The results show that the fracture of the steering knuckle mainly concentrated in the upper surface near the outer diameter area,and there were casting defects such as looseness and cracks near the fracture.Stress concentration occurred at the defect site,causing a decrease in the strength of the material.Under the action of the pressing force,cracks appeared at the defect site,and the cracks continued to propagate,ultimately leading to ductile fracture of the steering knuckle.关键词
铝合金转向节/压铸/铸造缺陷/韧性断裂/力学性能Key words
aluminum alloy steering knuckle/die cast/casting defect/ductile fracture/mechanical property分类
通用工业技术引用本文复制引用
昌飞,戴煦,张晶晶,曾啸虎..压铸铝合金转向节断裂原因[J].理化检验-物理分册,2025,61(8):75-78,4.基金项目
华测检测认证集团创新研发项目(HQC31202112) （HQC31202112）
