华南理工大学学报(自然科学版) ›› 2015, Vol. 43 ›› Issue (11): 67-74.doi: 10.3969/j.issn.1000-565X.2015.11.010

• 材料科学与技术 • 上一篇    下一篇

平流铸造 Fe78Si9B13 非晶合金薄带流动 与传热的数值模拟

孙海波1,李烈军1,2   

  1. 1. 华南理工大学机械与汽车工程学院
    2. 广东韶关市华工高新技术产业研究院
  • 收稿日期:2014-12-08 修回日期:2015-07-02 出版日期:2015-11-25 发布日期:2015-10-01
  • 通信作者: 孙海波( 1986-) ,男,博士,助理研究员,主要从事现代先进铸造技术研究 E-mail:sunmyseven@126.com
  • 作者简介:孙海波( 1986-) ,男,博士,助理研究员,主要从事现代先进铸造技术研究
  • 基金资助:
    中国博士后科学基金资助项目( 2014M562176)

Numerical Simulation on Flow and Heat Transfer Behaviours During Planar Flow Casting of Amorphous Alloy Fe78Si9B13 Ribbon

Sun Hai-bo 1 Li Lie-jun1,2   

  1. 1. School of Mechanical and Automotive Engineering,South China University of Technology 2. Shaoguan-SCUT Institute of High-Tech Industries
  • Received:2014-12-08 Revised:2015-07-02 Online:2015-11-25 Published:2015-10-01
  • Contact: 孙海波( 1986-) ,男,博士,助理研究员,主要从事现代先进铸造技术研究 E-mail:sunmyseven@126.com
  • About author:孙海波( 1986-) ,男,博士,助理研究员,主要从事现代先进铸造技术研究
  • Supported by:
    Supported by the China Postdoctoral Science Foundation( 2014M562176)

摘要: 基于二维非稳态传热 - 多相流耦合模型和三维非稳态单辊结晶器传热模型,结 合生产数据,对平流铸造 Fe78 Si9B13时熔潭形成过程中的流动、传热现象以及结晶器内的 传热特征进行了研究. 结果表明: 在文中工艺条件下,熔潭稳定形成后,其上游弯月面呈 C 形,下游弯月面呈带波纹的斜坡状; 结晶器达到热平衡状态的时间为 20 s; 高温熔体对结 晶器冲击后,会在距表面 0. 0004 m 范围内形成一个热冲击区,该区域表面中心最高温度 可达 513. 5 K; 与径向热膨胀相比,结晶器周向热膨胀对实际总膨胀量的贡献更大,约为 96% .

关键词: 平流铸造, 非晶合金, 流动, 传热, 数值模拟

Abstract: On the basis of two models,namely,the developed coupled model of two-dimensional transient heat transfer and multiphase flow and the model of three-dimensional transient heat transfer of single-roller crystallizers, the fluid flow and heat transfer behaviors during the puddle forming precess of the planar flow casting ( PFC) of Fe78 Si9B13 as well as the heat transfer characteristics of rollers are investigated according to the production data. The results show that ( 1) under a given casting condition,the upstream and downstream meniscuses of the formed puddle are respectively in a crescent shape and in a slope shape with ripple; ( 2) the time for the crystallizer to reach a quasi-thermal equilibrium state is 20 s; ( 3) the impact of high temperature melts on the crystallizer causes an melt impact region of a depth of 0. 0004 m to form,where the maximum temperature in the center of crystallizer surface is about 513. 5K; and ( 4) in comparison with the radial thermal expansion,the circumferential thermal expansion of crystallizer plays a more important role in the actual total expansion,which accounts for 96% .

Key words: planar flow casting, amorphous alloy, flow, heat transfer, numerical simulation