Determination of non-metallic inclusions in a continuous casting slab of ultra-low carbon interstitial free steel by applying of metallographic method, electrolytic method and RTO technique
Determination of non-metallic inclusions in a continuous casting slab of ultra-low carbon interstitial free steel by applying of metallographic method, electrolytic method and RTO technique
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金相法、电解法和RTO技术测定超低碳无间隙原子钢连铸板坯中非金属夹杂物
DOI：
10.1038/s41598-018-36766-6
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发表时间：
2019-02
影响因子：
4.6
通讯作者：
Mei Yaguang
中科院分区：
文献类型：
--
作者：
Guo Jing;Cheng Shu sen;Guo Hanjie;Mei Yaguang
为了更准确地测定超低碳无间隙(IF)钢中的非金属夹杂物，并进一步确认它们来自紧凑型带钢连铸(CC)板坯，采用金相、电解法和RTO(室温有机)技术进行了研究。结果表明，金相法检测到的夹杂物尺寸较小，成分以Al_2O_3或TiN为主，而电解法提取的夹杂物尺寸较大，成分以硅酸钙为主。此外，应用RTO技术对提取的夹杂物的内部结构进行了检测。较大尺寸的硅酸钙型夹杂物主要来源于结晶器保护渣和/或中间包保护渣，受钢水成分的影响较小；较小尺寸的夹杂物一般为精炼或凝固过程中析出的内源夹杂物，强烈依赖于钢水成分和温度。
Metallographic, electrolytic method and RTO(room temperature organic) technique were applied in the present study to more accurately determine non-metallic inclusion in a ultra-low carbon interstitial free(IF) steel and further to confirm their origination in a Compact Strip Production Process (CSP Process) continuous casting (CC) slab. Results show that inclusions detected by metallographic method usually appear relative smaller size and are mainly Al2O3based or TiN based in composition, whereas those extracted by electrolytic method usually have larger size and are much more calcium-silicate based in composition. In addition, inner structures of extracted inclusions were detected by applying of RTO technique. The large size calcium-silicate based inclusions are confirmed high possibilities originating from mold flux and/or tundish flux entrapment, which are less affected by the liquid steel composition; while the smaller ones are generally endogenous inclusion precipitating during the refining or solidification process that strongly depending on the liquid steel composition and temperature.
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影响因子：
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通讯作者：
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