大棒材芯部疏松缺陷控制与负张力轧制工艺研究

中国机械工程 ›› 2014, Vol. 25 ›› Issue (10): 1400-1405.

大棒材芯部疏松缺陷控制与负张力轧制工艺研究

黄华贵1;王巍2;刘永1;杜凤山1

1.国家冷轧板带装备及工艺工程技术研究中心,秦皇岛,066004
2.燕山大学,秦皇岛,066004

出版日期:2014-05-25 发布日期:2014-05-27
基金资助:
国家自然科学基金资助项目（51005197）;河北省自然科学基金资助项目（E2013203377）

Research on Inner Porous Defect Control and Negative Tension Rolling Process of Large Section Bars

Huang Huagui1;Wang Wei2;Liu Yong1;Du Fengshan1

1.National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Qinhuangdao, Hebei, 066004
2.Yanshan University,Qinhuangdao,Hebei,066004

Online:2014-05-25 Published:2014-05-27
Supported by:
National Natural Science Foundation of China（No. 51005197）;Hebei Provincial Natural Science Foundation of China（No. E2013203377）

摘要/Abstract

摘要：

以某厂直径150mm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。

关键词: 大棒材, 疏松, 负张力轧制, 体积可压缩材料, 有限元方法

Abstract:

Aiming at a 150mm large section bar continuous rolling line, considering the porous defects 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 compacted 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.

Key words: large section bar, porous defect, negative tension rolling, compressible material, finite element method(FEM)

中图分类号:

TG335.62

黄华贵, 王巍, 刘永, 杜凤山. 大棒材芯部疏松缺陷控制与负张力轧制工艺研究[J]. 中国机械工程, 2014, 25(10): 1400-1405.

Huang Huagui, Wang Wei, Liu Yong, Du Fengshan. Research on Inner Porous Defect Control and Negative Tension Rolling Process of Large Section Bars[J]. China Mechanical Engineering, 2014, 25(10): 1400-1405.

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