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Phi 40mm HRB600 high-strength aseismic steel bar and production method thereof

An anti-seismic steel bar and high-strength technology, applied in the direction of roll speed control, temperature control, metal rolling, etc., can solve the problems of difficult control of 40mm steel bar performance, poor performance stability, poor seismic performance, etc., to achieve improved plasticity and toughness, and small performance fluctuations , the effect of low production cost

Pending Publication Date: 2021-08-10
盐城市联鑫钢铁有限公司
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Problems solved by technology

[0002] At present, there are relatively few HRB600 steel bars in the domestic market, and most steel mills are still in the production and sales of HRB400 steel bars. The HRB600 steel bars produced in the prior art generally have poor performance stability, low strength-to-yield ratio, poor seismic performance, and low cost. Higher comprehensive problems, especially the performance of 40mm steel bars is not easy to control, and the performance stability is poor; with the continuous development of my country's buildings towards high-rise, long-span and earthquake-resistant structures, the development of 600MPa earthquake-resistant steel bars with high strength, toughness and excellent comprehensive performance has become an important issue. One of the important tasks for the iron and steel industry to upgrade its technical level and adjust its product structure

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  • Phi 40mm HRB600 high-strength aseismic steel bar and production method thereof
  • Phi 40mm HRB600 high-strength aseismic steel bar and production method thereof
  • Phi 40mm HRB600 high-strength aseismic steel bar and production method thereof

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Embodiment Construction

[0017] A Φ40mmHRB600 high-strength anti-seismic steel bar, the chemical composition of which is by weight: C 0.25-0.27wt%, Si 0.50-0.65wt%, Mn 1.45-1.55wt%, S≤0.035wt%, P≤0.035wt%, V0.125~0.140wt%, Nb 0.025~0.030wt%, the rest is Fe and unavoidable impurities, Cr+Ni in impurities is the residual elements in molten iron and scrap steel, which can improve the corrosion resistance of steel bars.

[0018] A production process method of Φ40mmHRB600 high-strength anti-seismic steel bar, which comprises the following process steps:

[0019] Step 1: Put molten iron and steel scrap at 70±2t and 16±2t respectively into an 80-ton electric arc furnace for blowing with oxygen supply, and control the oxygen pressure at 0.75-1.05MPa, and then add CaO content ≥84% into the furnace in batches Slagging is carried out with high-quality lime, and the carbon content at the end point is controlled to be 0.08-0.12wt%, P≦0.025%, and the trace elements do not exceed the standard, and the temperature is...

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Abstract

The invention relates to the technical field of smelting, in particular to a phi 40mm HRB600 high-strength aseismic steel bar and a production method. The steel comprises, by weight, 0.25-0.27wt% of C, 0.50-0.65wt% of Si, 1.45-1.55wt% of Mn, less than or equal to 0.035wt% of S, less than or equal to 0.035wt% of P, 0.125-0.140wt% of V, 0.025-0.030wt% of Nb, and the balance Fe and inevitable impurities, and Cr+Ni in the impurities are residual elements in molten iron and scrap steel. The steel bar provided by the invention has the comprehensive characteristics of high strength, high shock resistance, high toughness, low cost, stable performance and the like.

Description

technical field [0001] The invention relates to the technical field of product inspection, in particular to a Φ40mmHRB600 high-strength anti-seismic steel bar and a production method. Background technique [0002] At present, there are relatively few HRB600 steel bars in the domestic market, and most steel mills are still in the production and sales of HRB400 steel bars. The HRB600 steel bars produced in the prior art generally have poor performance stability, low strength-to-yield ratio, poor seismic performance, and low cost. Higher comprehensive problems, especially the performance of 40mm steel bars is not easy to control, and the performance stability is poor; with the continuous development of my country's buildings towards high-rise, long-span and earthquake-resistant structures, the development of 600MPa earthquake-resistant steel bars with high strength, toughness and excellent comprehensive performance has become an important issue. It is one of the important tasks f...

Claims

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Application Information

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IPC IPC(8): C22C38/02C22C38/04C22C38/38C22C38/24C22C38/26C22C38/20C22C33/06B21B1/16B21B1/18B21B37/46B21B37/74
CPCC22C38/02C22C38/04C22C38/38C22C38/24C22C38/26C22C38/20C22C33/06B21B1/18B21B37/74B21B37/46B21B1/163
Inventor 赵根社刁承民谢吉祥谢碧松王康
Owner 盐城市联鑫钢铁有限公司
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