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AM60B镁合金方向盘骨架半固态射压 凝固过程数值模拟研究
Numerical Simulation of the Thixomolding Solidification Process for AM60B Magnesium Alloy Steering Wheel Frames
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- DOI:
- 作者:
- 徐春杰1，2，3，赵思琪 1，2，段宗昊 1，2，顾峻齐 1，2，谢婉婷 1，2，屠 涛 2，3，田
XUChunjie1,2,3, ZHAO Siqi1,2, DUAN Zonghao1,2, GU junqi1,2, XIE Wanting1,2, TU Tao2,3, TIAN Jun2,3,
- 作者单位:
- 1. 西安理工大学材料科学与工程学院，陕西西安710048；2.西安谢赫特曼诺奖新材料研究院，陕西西安710048；3.镁 高镁诺奖(铜川)新材料有限公司，陕西铜川727031
1. School of Materials Science and Engineering, Xi'an University of Technology, Xi'an 710048, China; 2. Xi'an Shechtman Nobel Prize New Materials Institute, Xi'an 710048, China; 3. Meigaomei Nobel Prize (Tongchuan) New Materials Co., Ltd., Tongchuan 727031, China
- 关键词:
- 半固态射压成形；AM60B镁合金；方向盘骨架；缩松缩孔；数值模拟
thixomolding; AM60B magnesium alloy; steering wheel frame; shrinkage and porosity defects; numerical simulation
- 摘要:
- 以AM60B镁合金重卡方向盘骨架半固态射压凝固过程为研究对象，针对铸件厚大部位在凝固过程孤立 液相区难以补缩的问题，利用ProCAST软件，优化了模具冷却排溢系统，并确定了最优生产工艺参数。在铸件厚大部位 的模具内局部设计冷却管路，以改变局部冷却条件，并结合工艺参数调整，针对模具改进后的凝固过程进行了模拟分 析。结果表明，最佳工艺参数为射压半固态浆料温度598℃，射压速度2m/s，模具预热温度为160℃。该参数下，收缩类 缺陷含量由2.27cm3降低至0.23cm3，减少了89.8%，满足实际生产要求。The thixomolding solidification process of an AM60B magnesium alloy heavy truck steering wheel frame was taken as the research object. Given that the bulk of the casting material is difficult to fill in the isolated liquid phase during the solidification process, the mold cooling and overflow system was optimized via ProCAST software, and the optimal production process parameters were determined. To change the local cooling conditions, a local cooling pipe was designed in the mold with the greatest part of the casting thickness, and the solidification process after the mold improvement was simulated and analysed according to the adjustment of process parameters. The optimum process parameters are the injection temperature of the semisolid slurry at 598 ℃, the injection velocity at 2 m/s, and the preheating temperature of the mold at 160 ℃. Under these parameter, the shrinkage defect content is reduced from 2.27 cm3 to 0.23 cm3, which is a reduction of 89.8% and can meet the actual production requirements.