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采用数值模拟和实验研究相结合的方法,研究了φ140 mm×φ110 mm的4045/3003铝合金包覆铸造过程中分流方式、铸造温度、铸造速度对温度场、流场及凝固过程的影响规律。结果表明:密集不均匀分流方式可最大化的使芯材支撑层四周温度分布和熔体流速趋于均匀一致,复合面上边缘温差在5℃内;3003铝合金铸造温度从720℃提高到760℃对整个温度场几乎没有影响,但在适当的温度范围较高的浇注温度有利于提高支撑层表面光滑度和铸锭表面质量;铸造速度过慢会出现卡锭现象,铸造速度过快会导致漏铝,因此铸造速度应保持在100 mm/min左右,以保证试验顺利进行。模拟结果可为进一步优化包覆铸造工艺和工业化提供理论基础。
The effects of shunting method, casting temperature and casting speed on temperature field, flow field and solidification process during 40 ± 300 mmφ110 mm 4040/5003 aluminum alloy cladding casting were studied by means of numerical simulation and experimental research. The results show that the dense non-uniform shunt method can maximize the temperature distribution and melt flow rate around the core support layer, the temperature difference of the upper edge of the composite surface is within 5 ℃, the casting temperature of 3003 aluminum alloy increases from 720 ℃ to 760 ° C has almost no effect on the whole temperature field. However, the pouring temperature with a higher temperature range is favorable for improving the surface smoothness of the support layer and the surface quality of the ingot; if the casting speed is too slow, the ingot ingot phenomenon may occur; if the casting speed is too fast, Aluminum leakage, so the casting speed should be maintained at 100 mm / min or so, in order to ensure the smooth running of the test. The simulation results can provide the theoretical basis for further optimizing the casting process and industrialization.