重力铸造铝合金副车架的数值模拟和试验验证

摘要

According to the shape characteristics of cast aluminum alloy sub-frame and actual casting method,the casting process of aluminum alloy sub-frame was simulated by Adstefan software. Simultaneously,the casting process parameters were optimized and the simulation results were applied to the test. In the simulation process, defects such as shrinkage were found easily to be formed because of irregular shape and uneven wall thickness of the sub-frame. After optimization of the casting process,the optimum pouring temperature was 700℃,the casting speed was 15 cm/s and the mold temperature was 350 ℃. Through the metallographic observation of the trial-produced castings, it was verified that the defects inside the sub-frame were greatly improved to meet the production requirements. Consequently,a feasible way to trial-produce the sub-frame has been explored.%针对铝合金副车架的外形特点,结合实际铸造工艺,利用Adstefan软件模拟了副车架铸铝件的铸造过程.同时对铸造工艺参数进行优化设计,并将模拟结果应用到试验中.在模拟过程中,由于副车架形状不规则且壁厚不均匀,易形成缩孔等缺陷.经过铸造工艺的优化,得到了最佳的浇注温度为700 ℃、浇注速度为15 cm/s、模具温度为350 ℃.通过对试制铸件的金相观察,验证了优化后的副车架内部缺陷大大改善,满足了生产要求,从而探索出一条开发试制副车架的有效途径.