|
|
|
| Analysis on clogging phenomenon of aluminum deoxidized sulfur-containing steel |
| XU Jia-lu, QU Zhi-dong, HUANG Guo-jun |
| Zenith Steel Group Company Limited, Changzhou 213011, Jiangsu, China |
|
|
|
|
Abstract Nodulation phenomenon of aluminium deoxidized sulphur-containing QC40 steel in a certain factory was analyzed.By scanning surface electron microscopy and energy spectrum analysis, it was found that the nodules were divided into two layers. The nodules near the inner layer of the nozzle were mainly MgO·Al2O3, high melting point CaO-Al2O3 and low melting point CaO-Al2O3. The nodules in the second layer are mainly MgO·Al2O3, CaO-Al2O3 with high melting point and CaS.The inclusions in the bar are mainly MgO·Al2O3, CaO-Al2O3 with high melting point and CaS inclusions.Analysis that appear this kind of phenomenon of nodular CaS belongs to high melting point is the cause of inclusion, but the liquid steel and wetting angle of 87° （less than 90°）, belongs to the wettability of molten steel and inclusion, Al2O3 and MgO style and high melting point CaO-Al2O3 and contact angle of liquid steel is greater than 90°, belongs to the high melting point and inclusion with poor wettability of molten steel, thus the CaS inclusions can only in the second the phenomena.The FactSage software was used to theoretically optimize the calcium treatment process of aluminum deoxidized sulfur-containing steel, and it was believed that by optimizing the calcium treatment process and reducing the secondary oxidation, the nodulation behavior of the immersed nozzle could be reduced or even eliminated.
|
|
Received: 01 March 2020
|
|
|
|
| [1] |
YANG Shu-feng, WANG Qiang-qiang, ZHANG Li-feng.Formation and modification of MgO·Al2O3 based inclusions in alloy steels[J].Metallurgial and Materials Transactions:B,2012, 43(4):731.
|
| [2] |
Cowles B A.High cycle fatigue in aircraft gas turbines-an industry perspective[J]. International Journal of Fracture, 1996, 80(2):147.
|
| [3] |
YANG S,WANG Q,ZHANG L,et al.Formation and modification of MgO·Al2O3-based inclusions in alloy steels[J]. Metallurgical and Materials Transactions:B, 2012, 43(4):731.
|
| [4] |
Verma N,Pistorius P C,Fruehan R J,et al.Transient inclusion evolution during modification of alumina inclusions by calcium in liquid steel: Part I. background, experimental techniques and analysis methods[J]. Metallurgical and Materials Transactions :B, 2011, 42(4):711.
|
| [5] |
隋亚飞,徐刚军,周军军,等.CSP含铝电工钢水口堵塞问题的研究和解决[J].连铸,2019,44(4):1.
|
| [6] |
单庆林,王保生,单伟,等.中碳低硅铝镇静钢连铸浸入式水口堵塞的原因分析及解决措施[J].连铸,2016,41(3):14.
|
| [7] |
成旭东,徐学良,唐志军,等.ML08Al水口堵塞的研究与解决[J].连铸,2012,37(1):13.
|
| [8] |
Sunday Abraham, Rick Bodnar, Justin Raines.Inclusion engineering and the metallurgy of calcium treatment[J]. Journal of Iron and Steel Research. International, 2013, 1(2):1243.
|
| [9] |
Salgado U D.Fluid force-induced detachment criteria for nonmetallic inclusions adhered to a refractory/molten steel interface[J]. Metallurgial and Materials Transactions:B,2018,49:1632.
|
| [10] |
Sangsuwan P,Tewari S N,Gatica J E,et al.Reactive infiltration of silicon melt through microporous amorphous carbon preforms[J]. Metallurgical and Materials Transactions:B, 1999, 30(5):933.
|
| [11] |
Singh S N,Bardes B P,Flemings M C.Solution treatment of cast Al-4.5 pct Cu alloy[J]. Metallurgical and Materials Transactions:B, 1970, 1(5):1383.
|
| [12] |
Sasai K, Mizukami Y.Effect of composition of immersion nozzle on occurrence of blister in steel sheet[J]. ISIJ International, 1996, 36(1):45.
|
| [13] |
Todoroki H.Effect of compositions of non-metallic inclusions on CC nozzle clogging of a Fe-Cr-Ni-Mo system stainless steel[J]. Tetsu-to-Hagané,2014,100(4):539.
|
| [14] |
Katsuhiro S.Mechanism of alumina deposition on alumina grap-hite immersion nozzle in continuous caster[J]. ISIJ,2001,41(11):1331.
|
| [15] |
Kusuhiro MUKAI.Effect of refractory materials on inclusion deposition of immersion nozzle in continuous casting and mathematical modeling of inclusion deposition[J].Tetsu-to-Hagané,1999,85:307.
|
| [16] |
LONG Mu-jun,ZUO Xiang-jun,ZHANG Li-feng,et al.Kinetic modeling on nozzle clogging during steel billet continuous casting[J]. Transactions of the Iron and Steel Institute of Japan, 2012,50(5):712.
|
| [17] |
李小明,汪衍军,贾李锋,等.不锈钢酸洗污泥对烧结黏结相与平衡相的影响[J].钢铁,2019,54(11):116.
|
| [18] |
赵建辉,张炯明,尹延斌,等.板坯夹杂物研究[J].连铸, 2019, 44(5):35.
|
| [1] |
LIU Liang. Analysis and control over formation cause of surface longitudinal crack for continuous casting bloom of sulfur bearing steel[J]. CONTINUOUS CASTING, 2022, 41(3): 51-55. |
| [2] |
WANG Zhang-yin, JIANG Min, WANG Xin-hua. Formation and evolution of inclusions in Q345D steel during secondary refining process[J]. Iron and Steel, 2022, 57(2): 63-72. |
| [3] |
ZHAO Jia-qi, CAI Xiao-feng, MA Jian-chao, LI Jie, ZHANG Lian-bing. Improvement on mechanism of nozzle clogging caused by CaS inclusions in Al-killed cold heading steel[J]. Iron and Steel, 2021, 56(9): 80-87. |
| [4] |
YANG Xin, ZHANG Yuan-yuan, HE Zhi-Jun, ZHANG Jun-hong, ZHAN Wen-long, YU Jing-kun. Study on inhibition of clogging of submerged entry nozzle by electric pulse technology[J]. Iron and Steel, 2021, 56(4): 52-56. |
| [5] |
XIE Yu-min, SONG Ming-ming, MEN Chao-qi, ZHU Hang-yu, MA Guo-jun, XUE Zheng-liang. Influence of Ca treatment on application of rare earth in HAZ during high heat input welding progress[J]. Iron and Steel, 2021, 56(3): 146-153. |
| [6] |
CHEN Zhuo, ZHENG Rui-qi, WANG Qian. Effect of titanium inclusions on performance of mold flux during continuous casting of Ti-bearing steel[J]. CONTINUOUS CASTING, 2021, 40(2): 33-37. |
|
|
|
|
2020, Vol. 39 
