铸造2025，Vol.74Issue(10)：1373-1381,9.
充型加压参数对差压铸造镁合金机匣冶金质量的影响
Effect of Filling and Pressurization Parameters on the Filling Process of Low-Pressure Casting Magnesium Alloy Casing
王晓明 1蔡增辉 1康洪岩 1杨光山 1李勇军 1徐琳 2宁志良2
作者信息
- 1. 中国航发哈尔滨东安发动机有限公司,黑龙江哈尔滨 150001
- 2. 哈尔滨工业大学材料科学与工程学院,黑龙江哈尔滨 150006
- 折叠
摘要
Abstract
The intricate structural design and drastic wall thickness transitions in large magnesium alloy casing castings often induce turbulent flow of molten metal during the differential pressure casting filling stage,resulting in internal defects like gas porosity and non-metallic inclusions.Uncontrolled filling speeds may severely degrade the mechanical properties of the castings.To optimize the pressurization parameters for the differential pressure casting of magnesium alloy casings,the ProCAST numerical simulation software was employed to investigate the mold filling process and analyze the effects of different pressurization rates on filling stability.The results indicated that for thin-walled casing castings,a single linear pressurization rate was insufficient to ensure stable filling of complex structural components.By implementing a nonlinear pressurization curve tailored to changes in the cross-sectional area of the casting,filling stability could be significantly improved.When the pressurization rate was set between 0.9 kPa/s and 1.2 kPa/s,no turbulence was observed at the molten metal front.However,as the pressurization rate increased,the back-filling phenomenon became more pronounced.Additionally,the locations of solidification defects(e.g.,shrinkage porosity)were unaffected by the pressurization method,but their volume markedly reduced compared to linear pressurization.Specifically,the shrinkage porosity volume decreased to 4.32 cm3,representing a 58.7％reduction relative to the linear pressurization scheme.关键词
镁合金/ProCAST数值模拟/差压铸造/加压参数/凝固缺陷Key words
magnesium alloy/ProCAST numerical simulation/differential pressure casting/pressure parameters/solidification defects分类
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王晓明,蔡增辉,康洪岩,杨光山,李勇军,徐琳,宁志良..充型加压参数对差压铸造镁合金机匣冶金质量的影响[J].铸造,2025,74(10):1373-1381,9.
