14Cr-13Co-5Mo-2Ni齿轮钢真空自耗熔炼过程的数值模拟  

Numerical Simulation on Consumable-Electrode Vacuum Melting Process for 14Cr-13Co-5Mo-2Ni Gear Steel

作　　者：程爱民[1] 马昱[1] 高向宙[1] 李京社[1] 杨树峰[1] 白李国[1] 

机构地区：[1]北京科技大学冶金与生态工程学院,北京100083

出　　处：《特殊钢》2014年第5期23-25,共3页Special Steel

基　　金：国家自然科学基金资助项目(No51374016)

摘　　要：建立了14Cr-13Co-5Mo-2Ni齿轮钢(/%:0.014C,0.26Si,0.17Mn,13.79Cr,12.69Co,4.66Mo,2.00Ni,0.53Al)直径290 mm 9 t锭真空自耗熔炼过程三维数学模型,研究冷却水压、电流和熔化速率对自耗锭凝固组织分布及晶粒大小的影响。研究结果表明,当冷却水压由6 000 MPa增加到8 000 MPa,电流由6.250 0 kA减小至6.228 6kA,熔化速率由1.250 kg/s降低至1.125 kg/s后,冶炼的自耗锭内部等轴晶区域增大将近1倍,晶粒数目提高了45.17%,晶粒平均半径减小了17%,最大二次枝晶间距减小了4.88%,基本达到晶粒细化,合金元素分布均匀化的目的。A three-dimensional mathematical model for consumable-electrode vacuum melting process of 14Cr-13Co- 5Mo-2Ni gear steel （/% ： 0. 014C, 0. 26Si, 0. 17Mn, 13.79Cr, 12. 69Co, 4. 66Mo, 2. 00Ni, 0. 53A1） diameter 290 mm, 9 t ingot has been established to study the effect of cooling water pressure, electric current and smelting rate on distri- bution of solidified structure and grain size of consumable-electrode vacuum melting ingot. Research results show that as the cooling water pressure increases from 6 000 MPa to 8 000 MPa, the current and smelting rate respectively decrease from 6. 250 0 kA and 1. 250 kg/s to 6. 228 6 kA and 1. 125 kg/s, the equiaxed zone in melted ingot increases nearly by one- fold, amount of grain increases by 45.17% , average grain size decreases by 17% and max spacing between secondary den- dritic arms decreases by 4. 88%, basically to achieve the object of grain fining and uniform distribution of alloying elements in steel.

关 键 词：14Cr-13Co-5Mo-2Ni齿轮钢 真空自耗 工艺参数 数值模拟 

分 类 号：TF764[冶金工程—钢铁冶金]