中文摘要：

微观结构特征和机械性质 2024 做一种新 rheoforming 技术在当演员组下面生产并且优化了热处理条件的铝合金被调查。现在的 rheoforming 联合了独立地发达的 rheocasting 进程，作为 LSPSF 说出(低过热与 shear 域流) 进程，并且存在压榨扔进程。试验性的结果证明 LSPSF 能被用来在 25 s 以内准备健全半固体泥浆充分遇见生产率压榨扔。主要(艾尔) 在 69 m 和 0.76 的形状因素的吝啬的相等的直径介绍，并且展示零骗诱 eutectics。与相比常规压榨扔，现在的 LSPSF rheoforming 能改进微观结构和机械性质。一个优化的热处理导致 microsegregation 和机械性质的重要改进的实质的减小，例如 321 MPa 的收益力量， 428 MPa 的最终的张力的力量和 12% 的延伸。

英文摘要：

The microstructure characteristics and mechanical properties of 2024 wrought aluminum alloy produced by a new rheoforming technique under as-cast and optimized heat treatment conditions were investigated. The present rheoforming combined the independently developed rheocasting process, named as LSPSF （low superheat pouring with a shear field） process, and the existing squeeze casting process. The experimental results show that LSPSF can be used to prepare sound semi-solid slurry within 25 s to fully meet the production rate of squeeze casting. The primary a（A1） presents in mean equivalent diameter of 69 ~rn and shape factor of 0.76, and features zero-entrapped eutectics. Compared with conventional squeeze casting, the present LSPSF rheoforming can improve the microstructures and mechanical properties. An optimized heat treatment results in substantial reduction of microsegregation and significant improvement of mechanical properties, such as yield strength of 321 MPa, ultimate tensile strength of 428 MPa and elongation of 12%.