High-strength anti-seismic HRB500E hot-rolled ribbed bar and production process thereof
A hot-rolled ribbed steel bar and production process technology, which is applied in the field of converter smelting and bar rolling, can solve the problems that the strength-yield ratio and yield-yield ratio of seismic steel bars cannot be satisfied at the same time, and the reduction of steel bars, etc.
Active Publication Date: 2013-01-16
PANGANG GROUP CHENGDU STEEL & VANADIUM
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Problems solved by technology
However, the effect of simple fine-grain strengthening on the yield strength of steel is greater than its tensile strength, which will reduce the strength-to-yield ratio of the steel bar and increase the yield ratio of the steel bar, so that the strength-to-yield ratio and the yield-to-yield ratio of the seismic steel bar cannot be satisfied at the same time. requirements
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[0012] Hereinafter, the production process of the high-strength earthquake-resistant HRB500E hot-rolled ribbed steel bar of the present invention and the steel bar produced according to the production process will be described in detail in combination with exemplary embodiments. Wherein, unless otherwise specified, the percentages involved are all percentages by weight.
[0013] According to an exemplary embodiment of the production process of the high-strength shock-resistant HRB500E hot-rolled ribbed steel bar of the present invention, the production process includes the following steps: raw material preparation, molten steel smelting, continuous casting billets, heating continuous casting billets, rolling, cooling, Post-processing and obtaining finished steel bars, wherein, in terms of weight percentage, the finished steel bars include the following chemical components: C: 0.21-0.24%, Si: 0.60-0.75%, Mn: 1.40-1.55%, P≤0.040%, S ≤0.040%, V: 0.07~0.12%, N: 0.007~0.010%, Mo: 0...
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The invention relates to a high-strength anti-seismic HRB500E hot-rolled ribbed bar which is microalloyed by optimizing chemical components. Pre-rolling heating schedule of a heating furnace is regulated correspondingly. Precipitation strengthening and grain refinement actions of V-N alloy in steel are given to full play. Yield strength and toughness of the steel bar are improved mainly. Tensile strength of the steel bar is mainly improved under the influence of microalloying element Mo on organization phase transformation. Therefore, tensile strength, field strength and toughness of the HRB500E hot-rolled ribbed bar are well matched, and high-strength seismic resistance is achieved. Mechanical properties of the high-strength anti-seismic HRB500E hot-rolled ribbed bar 40mm phi produced in trial can reach national standard of 500MPa hot-rolled anti-seismic ribbed bars, and the requirement of reinforced concrete steel for high-strength seismic resistance is met.
Description
technical field [0001] The invention belongs to the technical field of converter smelting and bar rolling, and more specifically relates to a production process of a high-strength shock-resistant HRB500E hot-rolled ribbed steel bar and the steel bar. Background technique [0002] As the main component of iron and steel materials, steel bars are the main reinforcing materials for reinforced concrete building structures. They carry tensile and compressive stress and strain in the structure, high cycle or low cycle fatigue effects, high temperature or cold brittle effects, physical or chemical corrosion, Various loads such as the reprocessing effect of steel bars enable concrete to meet various functional requirements and have a wide range of applications. In order to improve the safety of buildings, the foreign construction industry generally adopts anti-seismic steel bars with good welding performance and high strength. For example, Europe, America, Australia, New Zealand and...
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Inventor 李义长彭俊昕王健鲁庆文钟正华梁东黄生权余海滨王洪利严加骐滕建明易良刚蒋世川樊毅赵如龙李荣华
Owner PANGANG GROUP CHENGDU STEEL & VANADIUM