NSENGI’s New Developed Bloom Continuous Casting Technology for Improving Internal Quality of Special Bar Quality（NS Bloom Large Reduction）
作者单位：Plant ＆ Machinery DivisionNippon Steel ＆ Sumikin Engineering Co.Ltd.
会议名称：《2015连铸装备的技术创新和精细化生产技术交流会》
会议日期：2015年
学科分类：080602[工学-钢铁冶金] 08[工学] 0806[工学-冶金工程]
关 键 词：center porosity special bar quality improved quality bloom large reduction
摘 要：The special alloy steel which is widely used for the bearing and structural parts for a car and construction equipment *** great needs for improving the function and quality,because it affects the processing characteristic and heat treatability at machining and decides the reliability and durability of the final ***,various countermeasures have been taken for improving surface quality and internal quality of bloom（*** and internal crack,inclusions,center segregation） in the continuous caster for a long *** STEEL ＆ SUMIKIN ENGINEERING CO.,Ltd.（NSENGI） has developed many innovative technologies for improving the quality of the large section bloom caster from 1970’ s and put them into commercial use,such as NS plasma heater in tundish,NS M-EMS（In-Mold Electro-Magnetic Stirrer）,NS Soft ***,NSENGI aimed at no internal defects in the special bar quality and co-developed the large reduction technology for bloom continuous caster（NS bloom large reduction） with a special steel ***,NSENGI succeeded in reducing center porosity of cast *** addition,NSENGI firstly succeeded in putting it into commercial use in the world and have contributed to improving the yield ratio at the various steel *** the development,NSENGI did the numerical analysis and a rolling mill test by using the casting piece processed the artificial porosity in it,and gained a better understanding of the reduction characteristic of the ***,NSENGI realized the compact equipment which could reduce center porosity by high efficient bloom reduction and be installed into a little space of multi-strand bloom continuous *** this paper,the principle,the solved technological problems,the improved quality effect and the feature of bloom large reduction equipment are stated.