Effect of Different Alloying Processes on Inclusions of 18Cr Ultra-pure Ferrite Stainless Steel during Refining Process

doi:10.20057/j.1003-8620.2022-00207

Abstract

Abstract: Effect of different alloying processes on inclusions of 18Cr ultra-pure ferrite stainless steel during refining process were investigated by using industrial experiments and thermodynamic calculations. The results showed that the inclusion type of 18Cr ultra-pure ferrite stainless steel before titanium alloying is CaO-Al₂O₃-MgO， and the inclusion type changes to CaO-Al₂O₃-MgO-TiO_X after titanium alloying. After titanium alloying， the number density of inclusions and the weight percentage of TiO_X in Nb-Ti double stable heats number （Ti： 0.181%， Nb： 0.147%） are lower than those in single Ti stable heats number （Ti： 0.324%）.

Key words: 18Cr Ultra-pure Ferrite Stainless Steel, Refining Process, Inclusion, Nb-Ti Double Stable, Thermodynamic Calculation

摘要： 采用试验和热力学计算相结合的方法研究了不同合金化工艺对18Cr超纯铁素体不锈钢精炼过程夹杂物的影响。试验结果表明：18Cr超纯铁素体不锈钢钛合金化前的夹杂物类型为CaO-Al₂O₃-MgO，钛合金化后夹杂物类型转变为了CaO-Al₂O₃-MgO-TiO_X。铌钛双稳定（Ti：0.181%，Nb：0.147%）合金化后的炉次夹杂物数量密度和夹杂物中TiO_X的重量百分比都要低于钛单稳定（Ti：0.324%）的炉次。

关键词: 18Cr超纯铁素体不锈钢, 精炼, 夹杂物, 铌钛双稳定, 热力学计算

Zhang　Jianlong, Chen　Xingrun, Cheng　Yunxia, Li　Hongliang, Xu　Bin, Pan　Jixiang. Effect of Different Alloying Processes on Inclusions of 18Cr Ultra-pure Ferrite Stainless Steel during Refining Process[J]. Special Steel, 2023, 44(3): 34-38.

张建龙, 陈兴润, 程云霞, 李鸿亮, 徐斌, 潘吉祥. 不同合金化工艺对18Cr超纯铁素体不锈钢精炼过程夹杂物的影响[J]. 特殊钢, 2023, 44(3): 34-38.

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