Manufacturing technology of X100 anti-large deformation pipe steel
A manufacturing process and anti-large deformation technology, applied in the direction of manufacturing tools, temperature control, rolling force/roll gap control, etc., can solve the problem that there is little or no large-deformation-resistant pipeline steel, so as to improve toughness, promote diffusion, The effect of reducing the C content
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Embodiment 1
[0048] The chemical composition (wt%) of the developed X100 grade anti-large deformation pipeline steel is: C accounts for 0.046, Si accounts for 0.34, Mn accounts for 1.94, Nb accounts for 0.06, Ti accounts for 0.008, Mo accounts for 0.25, Ni accounts for 0.27, Cu accounts for 0.26 , P≤50ppm, S≤50ppm.
[0049] Send the cast slab that meets the composition requirements to a soaking furnace at 1200°C. After holding the heat for 150 minutes, descale the cast slab by high-pressure water to remove the oxide scale on the cast slab, and then enter into two-stage rolling; Zone rolling, the rolling start temperature is 1100°C, and the final rolling temperature is 1050°C; after multi-pass rolling, the billet is rolled to 81mm, and the reductions of each pass are 18%, 20%, 22 %, 22%, 24%, and the cumulative total reduction is 70%.
[0050] The intermediate billet is warmed to 900°C before the finish rolling mill, and starts the second stage of rolling, that is, the rolling in the non-r...
Embodiment 2
[0056] The chemical composition (wt%) of the developed X100 grade anti-large deformation pipeline steel is: C accounts for 0.045, Si accounts for 0.44, Mn accounts for 1.92, Nb accounts for 0.061, Ti accounts for 0.02, Mo accounts for 0.25, Ni accounts for 0.27, Cu accounts for 0.25 , P≤50ppm, S≤50ppm.
[0057] Send the slab that meets the composition requirements to a soaking furnace at 1200°C. After holding the heat for 150 minutes, descale the slab with high-pressure water to remove the iron oxide scale on the slab, and then enter into two-stage rolling. The first stage of rolling is rolled in the recrystallization zone, the rolling start temperature is 1130°C, and the final rolling temperature is 1070°C; after multiple passes of rolling, the billet is rolled to 81mm, and the reductions of each pass are respectively 18%, 20%, 22%, 22%, 24%, and the cumulative total reduction is 70%.
[0058] The intermediate billet is warmed to 900°C before the finish rolling mill, and sta...
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