铝合金车轮内轮缘伸长率性能研究

Study on Elongation of Aluminum Alloy Inner Wheel Rim

内轮缘伸长率性能是衡量铸造铝合金车轮品质的重要指标,也是铝合金车轮的技术攻关难点,内轮缘伸长率主要受此部位微观缩松和二次枝晶间距的影响。运用模拟分析软件对多种铸造条件下的内轮缘区域微观缩松情况和二次枝晶间距进行理论研究和DOE分析。结果表明:内轮缘是整个铝合金车轮上比较容易产生微观缩松的区域,同时也是二次枝晶间距数值相对较小的区域;铸造条件调整对内轮缘区域的微观缩松和二次枝晶间距影响往往是相反的,在解决实际问题时只有辨别影响其伸长率性能的主要影响因素,才能找到有效地调整措施。

The elongation of inner wheel rim is an important index to evaluate the quality of cast aluminum alloy wheel,and it is also a technical difficulty of aluminum alloy wheel casting.The elongation of inner rim is mainly affected by the micro porosity and SDAS at the region.In the study,simulation analysis software was utilized for theoretical research and the analysis of DOE on the micro porosity and SDAS of inner rim under various casting conditions.The results show that the inner rim is an area of whole aluminum alloy wheel where the micro porosity is easy to produce,and is also the area with relatively small SDAS;the influence of casting conditions adjustment on the micro porosity and SDAS in the inner rim region is usually opposite,and effective adjustment measures can be found only by identifying main influence factors affecting the elongation in solving practical problems.