论文部分内容阅读
研究等温热处理对半固态AZ91D镁合金组织的影响。结果表明,随着保温温度的提高和保温时间的延长初生α-Mg相的圆整度提高。在等温热处理过程中,半固态组织经历了组织分离、球化和粗化长大三个过程。半固态组织中的液相由液池、小液池和液相薄膜3部分组成,固相由初生α-Mg相和二次凝固时形成的α-Mg相2部分组成。
The effect of isothermal heat treatment on microstructure of semi-solid AZ91D magnesium alloy was studied. The results show that the roundness of primary α-Mg phase increases with the increase of holding temperature and holding time. In the isothermal heat treatment process, the semi-solid tissue has undergone three processes of tissue separation, spheroidization and coarsening. The liquid phase in the semi-solid structure is composed of liquid pool, small liquid pool and liquid film. The solid phase consists of primary α-Mg phase and α-Mg phase 2 formed during secondary solidification.