| 高铝奥氏体无磁钢20Mn23Al2V板坯连铸结晶器保护渣的研究 |
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| 引用本文： | 张宇斌,文光华,于雄,唐萍.高铝奥氏体无磁钢20Mn23Al2V板坯连铸结晶器保护渣的研究[J].特殊钢,2013,34(6):22-25. |
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| 作者姓名： | 张宇斌 文光华 于雄 唐萍 |
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| 作者单位： | 1山西太钢不锈钢股份有限公司技术中心，太原030003 ；
2重庆大学材料科学与工程学院，重庆400044 |
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| 基金项目： | 国家自然科学基金项目资助(51274260) |
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| 摘 要： | 浇铸过程无磁钢20Mn23A12V(/%:0.14~0.20C、≤0.50Si、21.5~25.0 Mn、1.50~2.50Al、0.04~0.10V)中的Al-Al]易与保护渣中的SiO2-(SiO2)反应,导致结晶器保护渣变性,要求低碱度、低Al2O3的保护渣;并且该钢合金元素含量高,液相线温度低,要求低熔化温度的保护渣。设计了3种低碱度(0.55~0.61)、低熔化温度(904~1 015℃)的结晶器保护渣(/%:20.2~24.4CaO、35.3~40.0SiO2、2.2~4.1Al2O3、3.0~5.0B2O3),经25 t中间包,200 mm×1 260 mm板坯连铸试验。结果表明,5.0%B2O3,碱度0.50~0.60、熔化温度1 010℃、粘度0.215Pa·s的无磁钢20Mn23Al2V保护渣在0.60~0.65 m/min拉速下能较好的满足连铸工艺要求。
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| 关 键 词： | 高铝奥氏体无磁钢20Mn23Al2V 板坯连铸 结晶器保护渣 |
| 收稿时间： | 2013-06-07 |
A Study on Mold Powder for High Aluminium Austenite
Non-Magnetic Steel 20Mn23Al2V Slab Casting |
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| Zhang Yubin,Wen Guanghua,Yu Xiong,Tang Ping.A Study on Mold Powder for High Aluminium Austenite
Non-Magnetic Steel 20Mn23Al2V Slab Casting[J].Special Steel,2013,34(6):22-25. |
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| Authors: | Zhang Yubin Wen Guanghua Yu Xiong Tang Ping |
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| Affiliation: | 1 Technical Center, Shanxi Taiyuan Iron and Steel (Group) Co Ltd, Taiyuan 030003；
2 College of Materials Science and Engineering, Chongqing University, Chongqing 400044 |
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| Abstract: | The Al in non-magnetic steel 20Mn23Al2V (/% ： 0. 14 ~ 0. 20C, ≤0. 50Si, 21. 5 ~ 25. 0Mn, 1. 50 ~
2. 50Al, 0. 04 ~0. 10V)- Al] easily reacts with SiO2 in mold powder- (SiO2) led to modification of mold powder and the liquidus temperature of non-magnetic steel is lower because of higher alloy elements content, therefore the mold powder with low basicity, low A12O3 content and low melting temperature is required. Three kinds of mold powder (/% ： 20. 2 ~ 24.4CaO, 35. 3 ~40.0SiO2,2. 2 ~ 4. 1 Al2O3,3. 0 ~5. 0B2O3) with low basicity (0. 55 ~0. 61) and low melting temperature (904 ~ 1 015 ℃) have been designed. The test results by 200 mm x 1 260 mm slab casting with 25 t tundish show that the mold powder for non-magnetic steel 20Mn23Al2V with 5.0% B2O3, basicity 0.50 ~0. 60, melting temperature 1 010 °C and viscosity 0. 215 Pa·s and in casting speed 0. 60 ~ 0. 65 in/min is optimum to satisfy the requirement of casting process. |
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