氟化物对钢中氧化铝夹杂物改性的影响
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摘要
为了研究氟化物对钢中Al_2O_3夹杂物的改性作用,在某钢厂2t中频电炉中进行了钢中加氟化物的试验。在完成了对钢种的成分、温度控制后,向钢中加入以CaF_2/MgF_2混合物为主要组成的改性剂,探讨对钢中氧化铝夹杂物的改性作用。结果表明:向钢液中加入氟化物改性剂后,能够将钢中的Al_2O_3夹杂物改性成Al_2O_3与MnS的复合夹杂物,夹杂物心部Al_2O_3较多,MnS较少,而在边缘MnS含量增多,呈现出MnS包裹或半包裹Al_2O_3的复合形态,在难变形Al_2O_3与钢之间形成1个易变形的MnS缓冲层,减小了Al_2O_3对钢基体的危害。
To study the effect of fluoride on the modification of Al_2O_3 inclusions in steel,the experiment of adding fluoride into steel during melting process was carried out in 2 ton medium frequency furnace.After the composition and the temperature of the molten steel reached the experimental requirements,the composite modifier composed of CaF_2/MgF_2 mixture was added into the molten steel and the effect of the modifier on the modification of Al_2O_3 inclusions in steel was studied.The results showed that MnS and Al_2O_3 compound type inclusions appeared in the steel after modification treatment.The central position of the inclusions contained more Al_2O_3 and MnS content increased at the edge.The composite inclusions of MnS enwrapping and half enwrapping Al_2O_3 were formed.The deformable MnS buffer layer formed between Al_2O_3 and the steel matrix,could reduce the harm of Al_2O_3.
To study the effect of fluoride on the modification of Al_2O_3 inclusions in steel,the experiment of adding fluoride into steel during melting process was carried out in 2 ton medium frequency furnace.After the composition and the temperature of the molten steel reached the experimental requirements,the composite modifier composed of CaF_2/MgF_2 mixture was added into the molten steel and the effect of the modifier on the modification of Al_2O_3 inclusions in steel was studied.The results showed that MnS and Al_2O_3 compound type inclusions appeared in the steel after modification treatment.The central position of the inclusions contained more Al_2O_3 and MnS content increased at the edge.The composite inclusions of MnS enwrapping and half enwrapping Al_2O_3 were formed.The deformable MnS buffer layer formed between Al_2O_3 and the steel matrix,could reduce the harm of Al_2O_3.
引文
[1]孙彦辉,方忠强.钙处理中间产物的形成及其对氧化铝夹杂的改性[J].北京科技大学学报,2014,36(12):1 615-1 625.
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[11]张风林,任鸿儒,原春阳,等.Ce对0.2C-0.5Si-1.5Mn钢液洁净度与夹杂物变性的研究[J].太原理工大学学报,2012,43(5):595-602.
[12]杨吉春,刘晓,高学中,等.稀土元素Ce对2Cr13不锈钢中夹杂物变性的影响[J].特殊钢,2007,28(3):30-31.
[13]张峰,吕学钧,王波,等.稀土处理无取向硅钢中夹杂物的控制[J].钢铁钒钛,2011,32(3):46-50.
[14]杨晓红,吴鹏飞,吴铖川,等.特殊钢中稀土变质夹杂物行为研究[J].中国稀土学报,2010,28(5):612-618.
[15]彭承松,周德福,王建军,等.CaF2-MgF2对钢中Al2O3夹杂物去除作用的研究[J].钢铁钒钛,2017,38(1):123-131.
[16]王新华,王立峰.硬线钢中非金属夹杂物控制[J].金属制品,2005,31(5):9-13.
[17]雷少龙,姜敏,杨叠,等.Al脱氧钢中氧化物对MnS析出的影响[J].北京科技大学学报,2013,35(11):1 443-1 449.
[18]马跃,潘涛,江波,等.S含量对高速车轮钢断裂韧性影响的研究[J].金属学报,2011,47(8):978-983.
[2]杨俊,杜江,陈波涛,等.超低氧精炼时钙处理对氧化物夹杂的影响[J].钢铁,2015,50(1):19-26.
[3]M.Herrera,F.Castro,M.Castro,et al.Modification of Al2O3inclusions in medium carbon aluminum killed steels by AlCaFe additions[J].Ironmaking and Steelmaking,2006,33(1):45-51.
[4]张峰,王波,陈晓,等.钙处理对无取向硅钢中非金属夹杂物的影响[J].特殊钢,2011,32(1):44-47.
[5]张彩军,高爱民,蔡开科.管线钢夹杂物变性的理论与实验研究[J].过程工程学报,2008,8(S1):171-175.
[6]Abdelaziz.S,Megahed.G,El-Mahallawi.I,et al.Control of Ca addition for improved cleanness of low C,Al killed steel[J].Ironmaking&Steelmaking,2009,36(6):432-441.
[7]郭宝奇,包燕平,王敏,等.20Mn2钢钙处理过程钙铝比对夹杂物转变的影响[J].炼钢,2015,31(3):36-40.
[8]冯捷,包燕平,崔衡.镁对低碳铝镇静钢SPHC中夹杂物变性的影响[J].特殊钢,2010,31(6):16-20.
[9]郑万,刘磊,李光强.Ti-Mg复合脱氧钢中夹杂物细化机制[J].工程科学学报,2015,37(7):873-882.
[10]李长荣,杨洪,文辉.稀土元素对硬线钢中夹杂物的变性处理[J].热加工工艺,2010,39(8):12-14.
[11]张风林,任鸿儒,原春阳,等.Ce对0.2C-0.5Si-1.5Mn钢液洁净度与夹杂物变性的研究[J].太原理工大学学报,2012,43(5):595-602.
[12]杨吉春,刘晓,高学中,等.稀土元素Ce对2Cr13不锈钢中夹杂物变性的影响[J].特殊钢,2007,28(3):30-31.
[13]张峰,吕学钧,王波,等.稀土处理无取向硅钢中夹杂物的控制[J].钢铁钒钛,2011,32(3):46-50.
[14]杨晓红,吴鹏飞,吴铖川,等.特殊钢中稀土变质夹杂物行为研究[J].中国稀土学报,2010,28(5):612-618.
[15]彭承松,周德福,王建军,等.CaF2-MgF2对钢中Al2O3夹杂物去除作用的研究[J].钢铁钒钛,2017,38(1):123-131.
[16]王新华,王立峰.硬线钢中非金属夹杂物控制[J].金属制品,2005,31(5):9-13.
[17]雷少龙,姜敏,杨叠,等.Al脱氧钢中氧化物对MnS析出的影响[J].北京科技大学学报,2013,35(11):1 443-1 449.
[18]马跃,潘涛,江波,等.S含量对高速车轮钢断裂韧性影响的研究[J].金属学报,2011,47(8):978-983.