论文部分内容阅读
熔体中B的损失主要在加B后的合金化过程 ,其次是铸造时熔体的保温过程 ,在工艺上加强脱氧和覆盖 ,可以比较合理地控制B含量 ;在保温铸造过程中B有向表面迁移聚集的倾向 ;w(B) =0 .0 13 %时 ,对铸态组织有明显细化作用 ,高倍组织发现针状相和块状相 ,B含量较低时 ,未发现针状相 ,块状相经电子探针X射线扫描分析 ,是一种含有合金元素As和其他杂质的富B化合物 ,熔体对硅砂炉衬侵蚀严重。
The loss of B in the melt is mainly the alloying process after the addition of B, followed by the heat preservation process of the melt when casting, and the deoxidation and the covering are strengthened in the process to control the B content more rationally; during the heat preservation casting, (B) = 0.013%, the as-cast microstructure is obviously refined, high-power microstructure was found acicular and massive phase, B content is low, no acicular phase was found , Massive phase by electron probe X-ray scanning analysis, is a kind of alloy elements containing As and other impurities rich B compounds, fused silica sand lining erosion serious.