差温轧制连铸钢坯芯部孔洞压合过程数值模拟

doi:10.12068/j.issn.1005-3026.2021.07.005

东北大学学报（自然科学版） ›› 2021, Vol. 42 ›› Issue (7): 939-946.DOI: 10.12068/j.issn.1005-3026.2021.07.005

差温轧制连铸钢坯芯部孔洞压合过程数值模拟

王斌¹，宁新禹¹，李方坡²，李海军¹

(1.东北大学轧制技术及连轧自动化国家重点实验室，辽宁沈阳110819;2.中国石油集团石油管工程技术研究院石油管材及装备材料服役行为与结构安全国家重点实验室，陕西西安710077)

修回日期:2020-12-28 接受日期:2020-12-28 发布日期:2021-07-16
通讯作者: 王斌
作者简介:王斌(1984-)，男，辽宁锦州人，东北大学讲师，博士.
基金资助:
国家重点研发计划项目(2017YFB0305103)；辽宁省自然科学基金资助项目(2020-MS-078)；中国石油天然气集团有限公司科学研究与技术开发项目(2019B-4014，2018E-2101).

Numerical Simulation of Void Closure in the Core of Continuous Casting Steel During Temperature Gradient Rolling Process

WANG Bin¹， NING Xin-yu¹， LI Fang-po²， LI Hai-jun¹

1.State Key Laboratory of Rolling and Automation， Northeastern University， Shenyang 110819， China; 2.State Key Laboratory for Performance and Structure Safety of Petroleum Tubular Goods and Equipment Materials， CNPC Tubular Goods Research Institute， Xi’an 710077， China.

Revised:2020-12-28 Accepted:2020-12-28 Published:2021-07-16
Contact: WANG Bin
About author:-
Supported by:
-

摘要/Abstract

摘要： 基于“温度-形变”耦合控制的高渗透差温轧制技术，通过DEFORM有限元软件研究了差温轧制过程中轧制前强水冷与轧制压下率对铸坯芯部缩孔压合的影响规律.研究结果表明，温度梯度是金属变形流动的主要影响因素之一，增加水冷时间等工艺条件可以提高铸坯芯表温差，获得较大温度梯度，有效提升轧制变形渗透性；在提高铸坯温度梯度的条件下，通过增加单道次轧制压下率可以进一步提高铸坯芯部金属流动性，促进孔洞压合，改善铸坯内部质量.

关键词: 高强钢；差温轧制；压下率；孔洞压合；数值模拟

Abstract: Based on the high permeability temperature gradient rolling technology by temperature-deformation coupling control， the effects of the intensive water cooling before rolling and rolling reduction ratio on void closure in the core of the bloom were studied by numerical simulation using DEFORM software. The results show that temperature gradient greatly affects the deformation flow of the bloom. Increasing the water-cooling time increases the temperature difference between the core and the surface of the continuous casting steel， which leads to a larger temperature gradient， so that the deformation permeability of rolling can be enhanced effectively. Moreover， an increasing reduction ratio of the single-pass rolling combined with the temperature gradient can further increase the deformation flow in the core of the bloom， which promotes the void closure， so that the quality of the continuous casting steel can be greatly improved.

Key words: high strength steel; temperature gradient rolling; reduction ratio; void closure; numerical simulation

中图分类号:

TG335.11

王斌，宁新禹，李方坡，李海军. 差温轧制连铸钢坯芯部孔洞压合过程数值模拟[J]. 东北大学学报（自然科学版）, 2021, 42(7): 939-946.

WANG Bin， NING Xin-yu， LI Fang-po， LI Hai-jun. Numerical Simulation of Void Closure in the Core of Continuous Casting Steel During Temperature Gradient Rolling Process[J]. Journal of Northeastern University(Natural Science), 2021, 42(7): 939-946.

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差温轧制连铸钢坯芯部孔洞压合过程数值模拟

Numerical Simulation of Void Closure in the Core of Continuous Casting Steel During Temperature Gradient Rolling Process

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