WANG Zhaodong
,
GUO Yanhui
,
ZHAO Zhong
,
LIU Xianghua
,
WANG Guodong
钢铁研究学报(英文版)
The processing conditions of the texture formation and deep drawability of a TiIF steel strip hotrolled in ferritic region and subsequently annealed were investigated. The rvalue increases with the decrease of reheating temperature, and finish rolling temperature and the increase of reductions in ferritic region. For lubricated ferritic rolling and annealing, the rvalue is raised up to 175, and elongation rate is over 50% at the finish rolling temperature of 650 ℃, which is suitable for DDQ grade products. However, the rvalue is below 10 in the case of unlubricated rolling. The Xray diffraction was used to analyze the textural characteristic of samples. For samples subjected to lubricated rolling and annealing, the strong {111}∥ND recrystallization texture is distributed homogeneously along the thickness direction, and the intensity of {110} recrystallization texture is very low even in surface. However, for unlubricated samples, the {111} texture is distributed inhomogeneously and is weak along the thickness direction, and {110}∥ND recrystallization texture is strong, which deteriorates the formability.
关键词:
IF steel;ferritic rolling;annealing;deep drawability;texture
ZHU Fu-wen
,
HU Xian-lei
,
ZHAO Zhong
钢铁研究学报(英文版)
Viewpoint that using the identification quantity to identify the long ear disfigurement was brought up, and by calculation, it can be deduced that identification quantity should be set as the quantity of long ear disfigurement of the position which is about 0.2 times of plate width to the plate border. Conception of plate head tiny cell was brought up, and the long ear disfigurement was uncoupled into the product of elongation percentage and length of tiny cell. On the base of prediction of long ear disfigurement, process control model of MAS rolling was built up, and application indicates that it can fit the on-line producing and eliminate the long ear disfigurement commendably
关键词:
plate;plan view pattern;MAS rolling;long ear disfigurement;head disfigurement
