在 SIMA 过程的 AZ61 镁合金的非树突结构上的 predeformation 举止, predeformation 比率和等温的热对待参数的效果被学习。在相互平等的热对待状况下面,在 SIMA 过程的半固体微观结构上的热弄翻 predeformation 的影响与冷压缩 predeformation 的相比。结果显示在 AZ61 镁合金营舍的那非树突微观结构能被热或冷的弄翻的 predeformation 在 SIMA 过程获得,尽管他们进化的机制是不同的。增加热或冷的弄翻的 predeformation 比率能提高在存储精力前形成直到浸透,而是合适的等温的温度的非树突微观结构的效果和质量,成立时间应该被选择。
The effect of predeformation manner, predeformation ratio and isothermal heat-treat parameter on the non-dendrite structure of AZ61 magnesium alloy in SIMA process was studied. Under coequal heat-treat condition, the impact of the hot upsetting pre- deformation on semi-solid microstructure in SIMA process was compared with that of the cold compressive predeformation. The results indicate that non-dendrite microstructure in AZ61 magnesium alloy billets can be obtained by hot or cold upsetting predeformation in SIMA process, although their mechanisms of evolution are different. Increasing hot or cold upsetting predeformation ratio can enhance the effect and quality of the non-dendrite microstructure formed before storage energy up to saturation, but the proper isothermal temperature and holding time should be selected.