JG4246A合金返回料夹杂物分析

Analysis of Inclusions in JG4246A Revert

分析了不同类别JG4246A返回料清洗处理前后表面夹杂物种类及分布。结果发现,返回料清洗前表面以与型壳反应后生成的Al_(2)O_(3)夹杂物为主,面积分数为24%~25%,同时存在少量HfO_(2)、富Ti氧化物及富Zr和Hf的氧化物。返回料处理后,表面仍存在一定数量Al_(2)O_(3)夹杂物,少量富Hf、富Zr和Si夹杂。返回料100%清洗并熔化后浮渣较多,无法满足返回料再利用需求,需进一步提高返回料母合金洁净度。

The kinds and distributions of inclusions in the surface of different types of JG4246 A revers before and after cleaning treatment were systematically analyzed.The results indicate that the Al_(2)O_(3)inclusions forming after the reaction with the shell are mainly on the surface of the revert before cleaning treatment,accounting for about 24%~25% of the area fraction.At the same time,there are a small amount of HfO_(2),Ti-rich inclusions and Zr-and Hf-rich inclusions,while there are still a certain amount of Al_(2)O_(3)inclusions,a small amount of Hf-rich inclusions and Zr-and Si-rich inclusions on the surface of the revert after cleaning treatment.After 100% cleaning treatment reverts were melted,and the molten steel with a lot of scum could not meet the demand for reuse of the reverts.It is necessary to further improve the cleanliness of the revert master alloy.