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Steel for high strength shock-proof hot-rolled steel bar

A high-strength, rebar technology, applied in the fields of high-strength steel hot-processed bar steel and hot-rolled steel bar, can solve the problems of increasing steel consumption, increasing construction cost, low strength-yield ratio, etc., and reducing the density of reinforcement. , The effect of improving the seismic performance and the strength-yield ratio

Active Publication Date: 2006-05-10
MAANSHAN IRON & STEEL CO LTD
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  • Summary
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AI Technical Summary

Problems solved by technology

Since the yield strength and strength-to-yield ratio of the steel bars in the above countries are relatively low, to ensure the safety and seismic performance of the building structure, it is necessary to increase the density of the bars or the specifications of the steel bars with high strength, which increases the amount of steel and increases the construction cost.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0012] Embodiment 1: adopt common steelmaking process respectively by " numbering " of table 1 on general steelmaking equipment, each element of designation and content (% by weight %) carry out smelting; With general steel rolling equipment and rolling process, produce A high-strength anti-seismic hot-rolled steel bar with a nominal diameter of 18mm was produced; the test results of the mechanical properties of the steel bar are listed in Table 1.

Embodiment 2

[0013] Embodiment 2: each element and content (% by weight %) specified by "numbering" 2 of table 1, repeat the method for embodiment 1, produce the hot-rolled high-strength shock-resistant hot-rolled steel bar of nominal diameter 18mm, steel bar mechanical property test The results are listed in Table 1.

Embodiment 3

[0014] Embodiment 3: each element and content (% by weight %) specified by "numbering" 3 of table 1, repeat the method for embodiment 1, produce the hot-rolled high-strength shock-resistant hot-rolled steel bar of nominal diameter 18mm, steel bar mechanical performance test The results are listed in Table 1.

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PUM

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Abstract

This invention relates to a aseismatic heat rolled steel bar with high strength, which belongs to alloy steel, especially to the heat rolled steel bar, the steel bar is composed by the following elements: 0.07-0.16úÑCíó1.2-2.0úÑSiíó1.5-2.0úÑMníó íœ0.4úÑCríó0.02-0.14úÑVú¼the rest is Fe and impurity. The universal steel-making device uses the universal technology; it smelts steel according to the said component range and produces heat rolled steel bar or rod with highe strength and better aseismatic charater. Wherein the yield strengthen ªÊs(p0.2)í¦550MPaú¼the yield proportion ªÊb / ªÊs(p0.2)í¦1.45. And the high strength and high yield proportion of the steel bar can enforce the aseismatic charater of the building.

Description

technical field [0001] The invention belongs to alloy steel, in particular to steel for hot-rolled steel bars for reinforced concrete, or steel for hot-processed bars of other high-strength steels. Background technique [0002] The alloy elements and content in steel affect the mechanical properties of steel, and the yield strength and strength-to-yield ratio of steel bars directly affect the safety and seismic performance of building structures. Therefore, the use of high-strength hot-rolled steel bars with good seismic performance in building structures has attracted increasing attention. At present, the highest yield strength level of hot-rolled steel bars for construction used at home and abroad is only 500-520MPa, and the highest requirement for the strength-to-yield ratio as an important seismic performance index can only be ≥1.30. For example, the 460MPa steel bar in the British BS4449:1997 standard requires a yield strength of ≥460MPa and a yield ratio of ≥1.10; the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/38
Inventor 完卫国
Owner MAANSHAN IRON & STEEL CO LTD
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