AISI304不锈钢熔化过程中夹杂物在固-液糊状区漂移与聚集行为的原位观察

金属学报

2006, Vol. 42

Issue (7): 708-714

论文

本期目录 | 过刊浏览

AISI304不锈钢熔化过程中夹杂物在固-液糊状区漂移与聚集行为的原位观察

梁高飞; 王成全; 方园

宝钢集团有限公司技术中心前沿技术研究所; 上海 201900

In Situ Observation on Movement And Agglomeration of Inclusion in Solid--Liquid Mush Zone During Melting of Stainless Steel AISI304

LIANG Gaofei; WANG Chengquan; FANG Yuan

Advanced Technology Institute; Technology Center of Baosteel; Shanghai 201900

引用本文:

梁高飞; 王成全; 方园 . AISI304不锈钢熔化过程中夹杂物在固-液糊状区漂移与聚集行为的原位观察[J]. 金属学报, 2006, 42(7): 708-714 .
, , . In Situ Observation on Movement And Agglomeration of Inclusion in Solid--Liquid Mush Zone During Melting of Stainless Steel AISI304[J]. Acta Metall Sin, 2006, 42(7): 708-714 .

全文: PDF(1258 KB)

摘要: 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。

关键词 ：夹杂物, Confocal激光扫描显微镜, 钢熔体

Abstract：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.

Key words： inclusion confocal laser scanning microscope steel melt movement agglomeration in-situ observation

收稿日期: 2005-10-18

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