Hot Rolled Strip Re-reddening Temperature Changing Law during Ultra-fast Cooling

被引：0

作者：

Lian-yun JIANG ^{[1
]}

Chun-jiang ZHAO ^{[2
]}

Jian-hui SHI ^{[1
]}

Guo YUAN ^{[1
]}

Xue-qiang WANG ^{[3
]}

Qing-xue HUANG ^{[1
]}

机构：

[1] State Key Laboratory of Rolling and Automation, Northeastern University

[2] School of Mechanical Engineering, Taiyuan University of Science and Technology

[3] Shougang Qian'an Iron and Steel Co., Ltd.

来源：

Journal of Iron and Steel Research(International) | 2015年 / 22卷 / 08期

关键词：

ultra-fast cooling; laminar cooling; cooling rate; re-reddening temperature;

D O I：

暂无

中图分类号：

TG335.11 [热轧]; TG335.56 [];

学科分类号：

080201 ; 080503 ;

摘要：

Temperature deviation between surface and the center of hot rolled strip is formed during ultra-fast cooling(UFC). Surface temperature would rise when temperature deviation goes up to an extent, and strip re-reddening phenomenon will appear. Strip re-reddening affects the stability of strip microstructure, property and temperature control precision. Thus, it is necessary to conduct research on re-reddening temperature changing law to improve strip property and temperature control precision. Strip temperature trends for various strip thicknesses and ultra-fast cooling rates were obtained by numerical calculation method. Re-reddening temperature, temperature deviation between surface and center, and boundary layer position changing law were obtained. By comparison, some conclusions were obtained: UFC re-reddening temperature and laminar cooling(LC) re-reddening temperature were linear to ultra-fast cooling rate respectively. Ultra-fast cooling rate affected UFC re-reddening temperature greatly, but it had little effect on LC re-reddening temperature. Equations which were used to calculate UFC re-reddening temperature, LC re-reddening temperature and maximum temperature deviation were obtained. The position of boundary layer stayed in 1/4 strip thickness.

引用

页码：694 / 702

页数：9

共 9 条

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