声-电物理场协同孕育处理对高碳钢中心偏析的影响及作用机理研究

高碳钢中心偏析问题是目前冶金研究的热点课题之一。本项目拟以高碳钢熔体为研究对象，以促进超声波、脉冲电场在钢铁生产中的应用、提高高碳钢的冶金质量为目的，开展超声波-脉冲电场协同孕育处理研究，利用扫描电镜、透射电镜、高温热台显微镜、高温液态X射线衍射检测、金属原位分析等工具和手段，分析超声波-脉冲电场协同孕育处理时超声波的功率和频率、脉冲电场的放电电压、放电频率、孕育处理时间、钢液过热度等对高碳钢中心偏析、凝固组织、元素迁移以及高碳钢熔体结构的作用规律，探讨超声波-脉冲电场协同孕育处理改善高碳钢中心偏析、细化高碳钢凝固组织的最佳条件，揭示超声波-脉冲电场协同孕育处理对高碳钢凝固行为、熔体结构特征及组织影响的机制，为开发超声波-脉冲电场协同孕育处理抑制高碳钢中心偏析、细化其凝固组织的新技术提供基础依据。

The Central segregation of high carbon steel is one of the hotspots in current metallurgical study. This project takes molten high carbon steel as the research target, takes promoting the application of ultrasonic and pulsed electric field in iron and steel production and improving metallurgical quality of high carbon steel for propose, carries out the synergetic inoculation treatment professional research about ultrasonic and pulsed electric field. We analysis the effect of ultrasonic power and frequency, discharge voltage and frequency of pulsed electric field, inoculation treatment time and superheat of molten steel on central segregation, solidification structure, element migration and melt structure of high carbon steel by the tools and means of SEM, TEM, high temperature microscope, X-ray soattering of high temperature liquid, original position analyzer for metal and so on. The optimum conditions of central segregation improving and solidification structure refining in high carbon steel by ultrasonic-pulsed electric field synergetic inoculation treatment are discussed. We will discusses the solidification behavior, molten structure characteristics and solidification structure influence mechanism of ultrasonic-pulsed electric field synergetic inoculation treatment on high carbon steel.Research results will provide basic theory for the inhibition of high carbon steel central segregation and the refinement of solidification structure during the synergetic inoculation treatment about ultrasonic-pulsed electric field on high carbon steel.