Method and system for producing IF steel through low temperature process
A low-temperature process and temperature range technology, which is applied in the field of steel rolling, can solve problems such as low temperature, cracks, and warped edges of hot-rolled strip steel, and achieve the effect of optimizing the steel burning system and reducing costs
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Embodiment 1
[0048] Embodiment 1: The influence of the temperature of the slab coming out of the furnace.
[0049]The experimental steel type is IF steel DC06. In the case of the same other processes, three different furnace temperatures are used to compare the effects of furnace temperature on hot coil precipitates and mechanical properties of finished products. The three furnace temperatures are 1260°C and 1230°C respectively. and 1200°C. Table 1 shows the precipitates of hot coils at the three furnace temperatures. It can be seen that with the decrease of the temperature of the furnace, the size of the precipitates in the hot coils increases significantly, and when the temperature decreases to 1230 ° C, coarser TiCN appears, which decreases to Coarse TiN appeared at 1200°C, and the coarse precipitates are beneficial to improve the mechanical properties of the finished product.
[0050]
[0051] The mechanical properties of the continuous annealed finished product are shown in Table ...
Embodiment 2
[0053] Embodiment 2: The influence of the total slab time in the furnace and the steel loading gap.
[0054] The experimental steel type is IF steel DC06. Under the same conditions of other processes, the influence of different combinations of slab total furnace time and steel loading gap parameters on the incidence of subsequent edge warping defects was statistically compared, as shown in the table. It can be seen from the table that under the same slab total time in the furnace, increasing the slab loading gap can reduce the occurrence rate of edge warping defects, while prolonging the slab total time in the furnace will test the edge defects. The occurrence of warped skin defects first decreased and then increased, and the occurrence rate was the lowest at 180-220 minutes. Considering the impact of the steel installation gap on production capacity, the steel installation gap of 130-150mm is optimal.
[0055]
Embodiment 3
[0056] Embodiment three: the influence of continuous retreat soaking temperature.
[0057] The experimental steel type is IF steel DC06, which is produced at a low temperature of 1200°C, and the soaking temperature of continuous annealing is 780°C, 800°C, 820°C and 840°C respectively. It can be seen that with the decrease of the continuous annealing soaking temperature, the yield and tensile strength show a slight increase trend, and the elongation fluctuates slightly, but they all meet the user's standard, and the r value and n value both increase slightly.
[0058]
[0059] Through one or more embodiments of the present invention, the present invention has the following beneficial effects or advantages:
[0060] The invention discloses a method and system for producing IF steel by adopting a low-temperature process. Firstly, heating the heating furnace to 1150-1200°C to heat the slab; secondly, controlling the width reduction of the side press to 50-100mm for Rough rolli...
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