Al-7Si-Mg铝合金挤压铸造过程热-力行为的研究

王春涛; 姚杰; 赵海东; 李俊文; 邓德杰

doi:10.15980/j.tzzz.2018.09.014

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Al-7Si-Mg铝合金挤压铸造过程热-力行为的研究
Temperature and Pressure Evolution during Al-7Si-Mg Alloy Solidification Process
2018年38卷第9期页码：977-980
纸质出版日期： 2018 ，
DOI： 10.15980/j.tzzz.2018.09.014

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[1]王春涛,姚杰,赵海东,李俊文,邓德杰.Al-7Si-Mg铝合金挤压铸造过程热-力行为的研究[J].特种铸造及有色合金,2018,38(09):977-980.

Wang Chuntao, Yao Jie, Zhao Haidong, et al. Temperature and Pressure Evolution during Al-7Si-Mg Alloy Solidification Process[J]. Special Casting & Nonferrous Alloys, 2018,38(9):977-980.
[1]王春涛,姚杰,赵海东,李俊文,邓德杰.Al-7Si-Mg铝合金挤压铸造过程热-力行为的研究[J].特种铸造及有色合金,2018,38(09):977-980. DOI： 10.15980/j.tzzz.2018.09.014.

Wang Chuntao, Yao Jie, Zhao Haidong, et al. Temperature and Pressure Evolution during Al-7Si-Mg Alloy Solidification Process[J]. Special Casting & Nonferrous Alloys, 2018,38(9):977-980. DOI： 10.15980/j.tzzz.2018.09.014.

摘要

采用了0.1、50、75和100 MPa压力对Al-7Si-Mg合金进行直接挤压铸造

对铸型内温度和压力变化进行了测试

讨论了两者之间的关系以及压力变化对收缩缺陷形成的影响。同时

计算了凝固过程铸件和模具界面摩擦力。结果表明

外挤压力对界面摩擦力和压力传递有重要作用。

Abstract

A series of experiments were carried out to measure the temperature and pressure histories in cavity of Al-7 Si-Mg direct squeeze castings with different applied solidification pressures of 0.1

and 100 MPa.The evolution of the measured temperatures and pressures was discussed comparatively.The effect of pressure change on formation of shrinkage defects was analyzed.Further more

the friction force between the castings and dies during solidification process was calculated.It is shown that the applied squeeze pressure has significant influence on the frictional force at die and casting interfaces

which affects the pressure evolution and transmission.