气滑铸造工艺参数对2024铝合金微观组织的影响

Effects of Air-slip Casting Parameters on the Microstructure of 2024 Aluminum Alloy

采用气滑铸造技术,按照不同的铸造工艺参数半连续铸造制备直径为135mm的2024铝合金锭坯,研究了浇注温度、浇注速度、气压对铸锭凝壳厚度和微观组织的影响。结果表明,在浇注温度为710℃、浇注速度为175mm/min、气压为0.6MPa、冷却水压为580kPa的条件下,制备出组织比较均匀细小、凝壳比较薄、表面比较光滑的铸锭。

2024 aluminum alloy ingot with 135 mm in diameters was produced by air-slip semi-continuous casting with varied processing parameters.The effects of pouring temperature,pouring velocity,gas pressure on thickness of solidified shell and microstructure of aluminum alloy ingot have been described.The results show that the ingot with uniform fine microstructure and thin-walled solidified shell as well as smooth surface can be produced successfully with filling at 710 ℃,at 175 mm/min,gas pressure of 0.6 MPa and cooling pressure of 580 kPa.