Simulation and research on the rheocasting process of 7075 aluminum alloy
Taking the 7075 aluminum alloy as an example, this paper did some simulation work on temperature, flow field and shrinkage porosity distribution in the rheocasting process using the simulation casting software PROCAST. Effects of the casting temperature and filling speed on casting quality as well as segregation phenomenon of solid and liquid phases were discussed in this paper. Proper ranges of casting temperature and filling speed were obtained by the simulation. Good quality parts without shrinkage porosity were obtained in validation test using the casting temperature of 622-625℃ and filling speed of 40mm/s. Rheocasting was an important forming method using semi-solid melt to manufacture metal parts directly. It was a promising trend of semi-solid forming industry which had shorter process, higher efficiency and lower energy consumption compared to SIMA method 1-4. Rheocasting was generally applied to casting aluminum alloy but seldom to wrought aluminum alloys. The 7xxx series aluminum was generally manufactured though wrought or rolling technique to obtain dense parts with high strength. But few of them were produced directly through casting method without casting flaws5-6.To process the 7xxx series aluminum by rheocasting method would further expand the application of wrought aluminum alloy, so it is essential to do some research on the rheocasting technique for wrought aluminum alloy. Taking the 7075 aluminum alloy as an example, this paper did some simulation work on temperature, flow field and shrinkage porosity distribution in the rheocasting process using the simulation casting software PROCAST The effects of casting temperature and filling speed on the casting quality as well as the segregation phenomenon of solid and liquid phases were discussed in this paper. Proper ranges of casting temperature and filling speed were obtained by the simulation.
rheocasting semisolid simulation solid fraction segregation 7075 procast
Nan Li Shuming Xing Peiwei Bao
School of Mechanical Electronic and Control Engineering,Beijing Jiaotong University,Beijing,China,100044
国际会议
2010 International Conference on Material and Manufacturing Technology(2010材料与制造技术国际会议 ICMMT2010)
重庆
英文
482-489
2010-09-17（万方平台首次上网日期，不代表论文的发表时间）