利用Confocal激光扫描显微镜原位观察了AISI304不锈钢熔化过程中夹杂物在固-液（S-L）糊状区内的漂移与聚集行为。结果显示，夹杂在剩余固相形成的液相通道中漂移，剩余奥氏体体积分数70%时平均漂移速率为80 μm/s；近完全熔化时，远离S-L界面的夹杂漂移速率高达1500 μm/s，而S-L界面附近的夹杂速率在50 ~ 200 μm/s之间。发现近完全熔化时钢熔体表层存在一层金属膜（δ铁素体相），具有类似于固体金属的晶界与亚晶界，表层钢膜吸附夹杂；随着熔化进行，糊状区内可见夹杂由球状向蠕虫状发展；夹杂之间表现出强吸引力，在表层钢膜处发生聚集以及自球化等行为。
The movement and agglomeration of inclusion in the solid-liquid (S-L) zone during melting of an AISI304 stainless steel has been observed in-situ by using a confocal laser scanning microscope. The results show that the inclusion particles move through the liquid channels formed by the remaining solid. The average movement rate is 80 μm/s when the volume fraction of remaining austenite is about 70 %. Near to absolute melting, the movement rate of the inclusion far away from S-L interface is higher than 1500 μm/s, and that nearby the interface is in the range from 50 μm/s to 200 μm/s. A metal layer (δ ferrite phase) has been observed on the melt surface. It has the crystal boundary and sub-boundary similar to ordinary metal. The inclusions have been adsorbed by the metal layer. The morphology of the visible inclusion transfers from granular to worm-like during melting. The inclusions attract severely with each other, as a result, they agglomerate and granulate close-by the metal layer.
参考文献
| [1] | |
| [2] | |
| [3] | |
| [4] | |
| [5] | |
| [6] | |
| [7] | |
| [8] | |
| [9] | |
| [10] | |
| [11] | |
| [12] | |
| [13] | |
| [14] | |
| [15] | |
| [16] | |
| [17] | |
| [18] | |
| [19] |
- 下载量()
- 访问量()
- 您的评分：
-
10%
-
20%
-
30%
-
40%
-
50%