CAJ | 학술논문

针对薄带铸轧过程冷却速率大的特点,采用微观偏析模型对碳钢在薄带铸轧过程中溶质元素的微观偏析进行了模拟,通过模拟给出了铸轧凝固过程中固相率随温度的变化规律,固相率仅在很窄的温度范围内迅速增加.同时给出了冷却速率对溶质元素偏析的影响规律,随冷却速率的增加,溶质元素晶间偏析增大,而晶内偏析较小.在此基础上给出了碳钢薄带双辊铸轧过程中凝固终了温度值,为确定铸带凝固终了点的位置及铸轧过程的稳定性提供了有效的数据,为铸轧薄带的质量分析提供了理论依据.
침대박대주알과정냉각속솔대적특점,채용미관편석모형대탄강재박대주알과정중용질원소적미관편석진행료모의,통과모의급출료주알응고과정중고상솔수온도적변화규률,고상솔부재흔착적온도범위내신속증가.동시급출료냉각속솔대용질원소편석적영향규률,수냉각속솔적증가,용질원소정간편석증대,이정내편석교소.재차기출상급출료탄강박대쌍곤주알과정중응고종료온도치,위학정주대응고종료점적위치급주알과정적은정성제공료유효적수거,위주알박대적질량분석제공료이론의거.
The microsegregation of the solute in steel strip during thestrip casting process was investigated by numerical modelling. The relationship between solid fraction and temperature was given. The solid fraction increases quickly in a very small temperature range. With the increasing of cooling rate, the segregation between dendrite becomes large whereas the segregation with in the dendrite becomes small. Based on the computation results, the completed solidification temperature distribution in the twin roll casting strip was obtained. The results provide a theoretical foundation for dealing with the problems of casting process controlling and quality analysis.