510L汽车大梁钢低熔点夹杂物形成的热力学及其控制研究  

Thermodynamics of Formation of Low Melting Point Inclusions and Its Control in 510L Automobile Crossbeam Steel

作　　者：阮文康[1,2] 包燕平[1,2] 林路[1,3] 王敏[1] 张乐辰[1,2] 

机构地区：[1]北京科技大学钢铁冶金新技术国家重点实验室,北京100083 [2]北京科技大学冶金与生态工程学院,北京100083 [3]北京科技大学国家板带生产先进装备工程技术研究中心,北京100083

出　　处：《铸造技术》2015年第12期2815-2819,共5页Foundry Technology

基　　金：中国博士后科学基金资助项目(2014M560890);国家自然科学基金资助项目(51274029)

摘　　要：结合某厂510L汽车大梁钢生产试验,通过Factsage6.2热力学软件计算SiO_2-Al_2O_3-CaO-MgO四元系的相图以及低熔点区,探讨了SiO_2-Al_2O_3-CaO-MgO系低熔点夹杂物生产条件以及钢液成分控制范围。结果表明,若使510L汽车大梁钢夹杂物成分控制在Si O2-Al2O3-Ca O-（5～10%）Mg O系低熔点区域,夹杂物目标成分为0～5.8%SiO_2、43.5%～53.1%CaO、40.2%～55.9%Al_2O_3和5%～10%MgO。与之平衡的钢液中铝含量为0.010%以上,钙含量〉12×10-6,氧含量在0.000 5%以内。With the consideration of production practice of 510 L automobile crossbeam steel in a specific Iron and Steel Group Co., SiO_2-Al_2O_3-CaO-MgO quaternary phase diagram and low melting point area of the phase diagram were calculated by the thermodynamic software Factsage6.2. The condition of forming SiO_2-Al_2O_3-CaO-MgO inclusion with low melting point and control of liquid steel composition were thermodynamically discussed. The results show that if inclusion composition of 510 L automobile crossbeam steel can be controlled in low melting point area of SiO_2-Al_2O_3-CaO-（5～10%）MgO system, the target of inclusion composition is 0～5.8%SiO_2, 43.5%～53.1%CaO, 40.2～55.9%Al_2O_3, 5%～10%MgO,and then it also guarantee that the aluminum content is more than 0.01%, calcium content is more than 12 ×10-6, oxygen content is within 0.000 5% in the balanced liquid steel.

关 键 词：汽车大梁钢 低熔点区 Factsge热力学软件 夹杂物 

分 类 号：U465.11[一般工业技术—材料科学与工程] TF76[机械工程—车辆工程]