中国机械工程
中國機械工程
중국궤계공정
CHINA MECHANICAl ENGINEERING
2014年
10期
1400-1405
,共6页
黄华贵%王巍%刘永%杜凤山
黃華貴%王巍%劉永%杜鳳山
황화귀%왕외%류영%두봉산
大棒材%疏松%负张力轧制%体积可压缩材料%有限元方法
大棒材%疏鬆%負張力軋製%體積可壓縮材料%有限元方法
대봉재%소송%부장력알제%체적가압축재료%유한원방법
large section bar%porous defect%negative tension rolling%compressible material%finite element method(FEM)
以某厂φ150 mm大棒材连轧机组为对象，将大规格连铸坯芯部疏松视为体积可压缩材料，利用刚塑性有限元方法，建立了非均质大棒材轧制过程三维热力耦合非线性有限元模型，采用数值模拟方法研究了机架间张力对疏松缺陷致密压实的影响规律。结果表明，采用负张力轧制比自由轧制或微张力轧制能更有效地压实芯部疏松缺陷。从各道次孔型充满度和出口断面形状、轧制力能参数等方面探讨了实施负张力轧制工艺的可行性。
以某廠φ150 mm大棒材連軋機組為對象，將大規格連鑄坯芯部疏鬆視為體積可壓縮材料，利用剛塑性有限元方法，建立瞭非均質大棒材軋製過程三維熱力耦閤非線性有限元模型，採用數值模擬方法研究瞭機架間張力對疏鬆缺陷緻密壓實的影響規律。結果錶明，採用負張力軋製比自由軋製或微張力軋製能更有效地壓實芯部疏鬆缺陷。從各道次孔型充滿度和齣口斷麵形狀、軋製力能參數等方麵探討瞭實施負張力軋製工藝的可行性。
이모엄φ150 mm대봉재련알궤조위대상，장대규격련주배심부소송시위체적가압축재료，이용강소성유한원방법，건립료비균질대봉재알제과정삼유열력우합비선성유한원모형，채용수치모의방법연구료궤가간장력대소송결함치밀압실적영향규률。결과표명，채용부장력알제비자유알제혹미장력알제능경유효지압실심부소송결함。종각도차공형충만도화출구단면형상、알제력능삼수등방면탐토료실시부장력알제공예적가행성。
Aiming at aφ150mm large section bar continuous rolling line,considering the porous de-fects in the large scale continuous casting billet as compressible material,a three-dimensional thermal-deformation coupled finite element model was established for heterogeneous large section bar rolling process with the rigid-plastic FEM.The influences of rolling tension on the porous compaction were investigated by numerical simulation.The simulation results show that the porous defects can be com-pacted better under negative tension rolling than that under zero tension and positive tension rolling. The spread and deformation are satisfactory in all the 9 passes,there is no defect appeared during the rolling process,and the final shape and dimension meet the requirements of bar production.The rolling force and torque was presented to evaluate the feasibility of this new rolling technology.
