High-strength steel bar and method for controlling power strength of concrete civil defense structure through high-strength steel bars
A high-strength steel bar and dynamic strength technology, which is applied in the field of high-strength steel bars and their control of the dynamic strength of concrete civil air defense structures, can solve the problems of high cost, unstable rolling quality, and high-strength steel bars whose yield strength cannot reach 600MPa and above. Effect of improving yield strength and tensile strength without reducing plasticity
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Embodiment 1
[0027] The high-strength steel bar of this embodiment has the following chemical composition and weight percentage: C: 0.19%, Si: 0.45%, Mn: 1.25%, V: 0.19%, Ti: 0.05%, Nb: 0.015%, Cr: 0.01%, Ni: 0.01%, P: 0.009%, S: 0.003%, N: 0.001%, and the balance is Fe and unavoidable impurities.
[0028]The production process of high-strength steel bars in this embodiment is: converter smelting, LF refining, billet continuous casting, bar rolling and cooling bed cooling; wherein, converter smelting, LF refining and billet continuous casting are all existing processes , billet continuous casting adopts the process technology of clean steel and defect-free continuous casting billet, alloy composition and nitrogen content in steel and precise control, continuous casting billet with excellent internal and surface quality of continuous casting billet; among them, bar rolling In the rolling process, the rolling speed is 11.0m / s, the temperature in the heating section is 1100°C, the temperature...
Embodiment 2
[0031] The high-strength steel bar of this embodiment, its chemical composition and weight percent are: C: 0.22%, Si: 0.71%, Mn: 1.51%, V: 0.24%, Nb: 0.006%, Cr: 0.025%, Ni: 0.03%, Cu: 0.02%, Mo: 0.01%, P: 0.008%, S: 0.009%, N: 0.008%, and the balance is Fe and unavoidable impurities.
[0032] The production process of high-strength steel bars in this embodiment is: converter smelting, LF refining, billet continuous casting, bar rolling and cooling bed cooling; wherein, converter smelting, LF refining and billet continuous casting are all existing processes , billet continuous casting adopts the process technology of clean steel and defect-free continuous casting billet, alloy composition and nitrogen content in steel and precise control, continuous casting billet with excellent internal and surface quality of continuous casting billet; among them, bar rolling In the rolling process, the rolling speed is 15.0m / s, the temperature of the heating section is 1050°C, the temperatur...
Embodiment 3
[0035] The high-strength steel bar of this embodiment has the following chemical composition and weight percentage: C: 0.29%, Si: 0.85%, Mn: 1.75%, V: 0.14%, Ti: 0.13%, Cr: 0.07%, Ni: 0.07%, Cu: 0.05%, Mo: 0.008%, P: 0.025%, S: 0.025%, N: 0.015%, and the balance is Fe and unavoidable impurities.
[0036] The production process flow of the high-strength steel bar of this embodiment is: converter smelting, LF refining, billet continuous casting, bar rolling and cooling bed cooling; wherein, converter smelting, LF refining and billet continuous casting are all existing Process, billet continuous casting adopts clean steel and defect-free continuous casting billet technology, alloy composition and nitrogen content in steel and precise control, continuous casting billet with excellent internal and surface quality of continuous casting billet; of which rod In the rolling process, the rolling speed is 18.0m / s, the temperature in the heating section is 1150°C, the temperature in the s...
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