Preparation method of 1300MPa-grade rare earth reverse transformation Q & P steel
A reverse conversion and rare earth technology, applied in the field of iron and steel metallurgy, can solve problems such as increasing costs, and achieve the effect of improving welding performance, increasing content and stability
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Embodiment 1
[0035] The present invention relates to a 1300MPa grade rare earth reverse transformation Q&P steel preparation method. The preparation steps are as follows: (1) Steel plate smelting and casting: the components are: C: 0.17% by mass, Mn: 2.31%, Si: 1.10 %, Al: 0.80%, V: 0.06%, B: 0.002%, the balance is Fe and unavoidable impurities. The powder of the composition of the present invention is smelted in an electric arc furnace, transferred to an IF furnace for refining, and fed through In the wire method, a mixed rare earth iron alloy containing 5% cerium, 2.5% lanthanum, and the rest is Fe and other unavoidable impurities is added to prepare a cast slab.
[0036] (2) Heat preservation, hot rolling, quenching: heat the cast slab to 1050℃, keep it for 1.2h, then perform hot rolling after the heat preservation, the opening temperature is 950℃, and finish rolling at 850℃ to obtain 1.8mm thick steel plate. , Quench to room temperature.
[0037] (3) The first reverse transformation heat p...
Embodiment 2
[0043] The present invention relates to a 1300MPa grade rare earth reverse transformation Q&P steel preparation method. The preparation steps are as follows: (1) Steel plate smelting and casting: the components are: C: 0.17% by mass, Mn: 2.31%, Si: 1.10 %, Al: 0.80%, V: 0.06%, B: 0.002%, the balance is Fe and unavoidable impurities. The powder of the composition of the present invention is smelted in an electric arc furnace, transferred to an IF furnace for refining, and fed through In the wire method, a mixed rare earth iron alloy containing 5% cerium, 2.5% lanthanum, and the rest is Fe and other unavoidable impurities is added to prepare a cast slab.
[0044] (3) Heat preservation, hot rolling, quenching: heat the cast slab to 1050°C, hold for 1.2h, and then perform hot rolling after heat preservation. The opening temperature is 950°C, and finish rolling is performed at 850°C to obtain a 1.8mm thick steel plate. , Quench to room temperature.
[0045] (3) The first reverse transf...
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