采用 CaO-MgO-Al2 O 3-SiO 2-CaF2渣系的精炼渣,研究了渣系中 MgO 含量对镁铝铁合金脱氧 H13钢中夹杂物密度、尺寸和成分的影响.结果表明：采用质量分数5％MgO 精炼渣精炼后,钢中的夹杂物最少,密度为55．62个.mm-2,夹杂物尺寸均小于8μm；当 MgO 的质量分数低于或高于5％时,夹杂物数量都较多,都含有尺寸为8~10μm 的大型夹杂物；当精炼渣中 MgO 的质量分数为0时,钢中夹杂物主要为 MgO.Al2 O 3和 Al2 O 3-SiO 2,当精炼渣中 MgO 的质量分数为5％,8％和12％时,钢中的夹杂物分别主要为 MgO.Al2 O 3和 Al2 O 3-SiO 2、MgO.Al2 O 3和 Al2 O 3-SiO 2-CaO、MgO.Al2 O 3和 Al2 O 3-SiO 2-CaO-MgO；通过热力学数据计算得到的与钢中镁、铝相对应的氧化物稳定区图与试验得到的 A 类夹杂物的成分一致.
The effects of MgO contents in slag system CaO-SiO 2-Al2 O 3-MgO-CaF2 on the number,size and composition of inclusions in H13 steel deoxidized with Mg-Al-Fe alloy were studied.Results show that when the content of MgO in the slag was 5wt%,the minimum number of inclusions was 55.62 per square millimeter,and the size of all inclusions was less than 8 μm.When the content of MgO in the slag was less than or more than 5wt%, there was more number of inclusions in the steel,and the size of some inclusions was 8-10 μm.When the content of MgO in the slag was 5wt%,8wt%,12wt%,respectively,the inclusions were MgO.Al2 O 3 and Al2 O 3-SiO 2 , MgO.Al2 O 3 and Al2 O 3-SiO 2-CaO,MgO.Al2 O 3 and Al2 O 3-SiO 2-CaO-MgO,respectively.A stability diagram of inclusions corresponding to magnesium and alumina contents in the steel was calculated employing available thermodynamic data,and the A-type inclusion composition experimentally obtained well agreed with the diagram.
参考文献
| [1] | 张立峰,李燕龙,任英.钢中非金属夹杂物的相关基础研究（Ⅰ）--非稳态浇铸中的大颗粒夹杂物及夹杂物的形核、长大、运动、去除和捕捉[J].钢铁,2013(11):1-10. |
| [2] | 孙伟;王静松;曹立军 等.镁处理对轴承钢中夹杂物变形的热力学分析[J].炼钢,2010,26(6):42-48. |
| [3] | Shu-feng Yang,Jing-she Li,Zai-fei Wang,Jiao Li,Lin Lin.Modification of MgO· Al2O3 spinel inclusions in Al-killed steel by Ca-treatment[J].矿物冶金与材料学报,2011(01):18-23. |
| [4] | MA W J;BAO Y P;WANG M et al.Effect of Mg and Ca treatment on behavior and particle size of inclusions in bearing steels[J].ISIJ International,2014,54(3):536-542. |
| [5] | 沈春飞,蒋兴元,李阳,龚伟,姜周华.Mg处理钢生成细小尖晶石夹杂物的研究[J].炼钢,2009(05):52-54,77. |
| [6] | PARK J H;TODOROKI H K .Control of MgO.Al2 O 3 spinel inclusions in stainless steel[J].ISIJ International,2010,50(10):1333-1335. |
| [7] | SUITO H;INOUE R .Thermodynamics on control of inclusions composition in ultra-clean steels[J].ISIJ International,1996,36(5):528-536. |
| [8] | 潘志胜,王谦,何生平,李玉刚.连铸保护渣组分对粘度的影响[J].四川冶金,2010(05):17-21. |
| [9] | 郭洛方,李宏,王耀,李永卿.Al_2O_3夹杂物在钢-渣界面处的运动特性及去除率[J].钢铁,2012(04):23-27. |
| [10] | 史冠勇;张廷安;牛丽萍 等.低氟 CaF2-Ca0-Al2 O3-MgO-SiO2 系精炼渣的性能[J].过程工程学,2011,11(4):695-699. |
| [11] | 王亮亮,李晶,周文,李积回.Mg对刀剪用钢中夹杂物影响的试验研究[J].南方金属,2012(03):1-3. |
| [12] | ZHANG T S;WANG D Y;LIU C W et al.Modification of inclusions in liquid iron by Mg treatment[J].Journal of Iron and Steel Research,2014,21(z1):99-103. |
| [13] | SARKAR R;DAS S .Auto combustion synthesis for magnesium aluminate spinel using glycine as fuel and its sintering study[J].Transactions of the Indian Ceramic Society,2014,73(2):172-176. |
| [14] | SATOH N;TANIGUCHI T;MISHIMA S et al.Prediction of nonmetallic inclusion formation in Fe-40mass%Ni-5mass%Cr alloy production process[J].Tetsu-to-Hagane,2009,95(12):827-836. |
| [15] | ONO H;NAKAJIMA K;IBUTA T et al.Equilibrium relationship between the oxide compounds in MgO-Al2 O 3-Ti2 O 3 and molten iron at 1873 K[J].ISIJ International,2010,50(12):1955-1958. |
| [16] | ZHANG T S;WANG D Y;LIU C W et al.Modification of inclusions in liquid iron by mg treatment[J].Journal of Iron and Steel Research,2014,21(z1):99-103. |
| [17] | OKUYAMA G;YAMAGUCHI K;TAKEUCHI S et al.Effect of slag composition on the kinetics of formation of Al2 O 3-MgO inclusions in aluminum killed ferritic stainless steel[J].ISIJ International,2000,40(1):121-128. |
| [18] | FUJII K;NAGASAKA T;HINO M .Activities of the constituents in spinel solid solution and free energies of formation of MgO,MgO.Al2 O 3[J].ISIJ International,2000,40(11):1064-1065. |
| [19] | 范植金,冯文圣,罗国华,朱玉秀.铝脱氧并真空脱气后喂钙-硅线对GCr5钢中氧含量及夹杂物的影响[J].机械工程材料,2011(10):46-49. |
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