30-05-2023 дата публикации
Номер: CN116179818A
Принадлежит:
The invention discloses a production method for improving the yield of a TMCP type low-temperature high-strength steel plate. The production method comprises the processes of casting blank smelting, TMCP rolling and water cooling after rolling. The casting blank obtained in the casting blank smelting process comprises the following chemical components in percentage by mass: 0.15%-0.20% of C, 0.20%-0.30% of Si, 0.90%-1.40% of Mn, less than or equal to 0.025% of P, less than or equal to 0.010% of S, 0.18%-0.25% of Cr, 0.010%-0.020% of Nb, more than or equal to 0.020% of Alt and the balance of Fe and inevitable impurities, wherein the carbon equivalent CEV is 0.40%-0.46%; in the TMCP rolling process, the initial rolling temperature of finish rolling is 840-860 DEG C, and the final rolling temperature is 800-820 DEG C; in the post-rolling water cooling process, the water inlet temperature is 790-810 DEG C, a post-rolling water cooling system is divided into four areas A/B/C/D, headers are distributed ...
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