Anti-seismic H-type steel and production method thereof

A production method and technology for H-beam, applied in the direction of temperature control, etc., can solve the problems of reducing the welding performance and toughness of steel, and high production cost, and achieve the effect of improving seismic performance, good combination of strength and toughness, and excellent comprehensive seismic performance.

Inactive Publication Date: 2011-04-20
MAANSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above anti-seismic steels all contain precious alloying elements such as Cr, Ni, Mo, Cu, etc., and the production cost is relatively high. At the same time, adding a large amount of alloying elements will reduce the welding performance and toughness of the steel.

Method used

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  • Anti-seismic H-type steel and production method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] The chemical composition of the anti-seismic H-beam is shown in Table 1 Example 1. The rolling process parameters are: heating temperature 1210°C; deformation below 950°C 50%; final rolling temperature 850°C.

[0022] The performance index is: R eL 500MPa, R m is 665MPa, R eL / R m 0.75, A is 24%, ΔE is 2.08%, 0°C longitudinal KV is 74J, cycle toughness value σ a ·Δε t 34.07J / cm 3 . The above indicators are better than the five performance indicators of anti-seismic steel.

Embodiment 2

[0024] The chemical composition of the anti-seismic H-beam is shown in Table 1, Example 2. The rolling process parameters are: heating temperature 1220°C; deformation below 950°C 55%; final rolling temperature 880°C.

[0025] The performance index is: R eL is 480MPa, R m 650MPa, R eL / R m 0.74, A is 20.5%, ΔE is 3.2%, 0°C longitudinal KV is 115J, cycle toughness value σ a ·Δε t 37.82J / cm 3 . The above indicators are better than the five performance indicators of anti-seismic steel.

Embodiment 3

[0027]The chemical composition of the anti-seismic H-beam is shown in Table 1, Example 3. The rolling process parameters are: heating temperature 1230°C; deformation below 950°C 60%; final rolling temperature 820°C.

[0028] The performance index is: R eL 530MPa, R m 695MPa, R eL / R m 0.76, A is 20.5%, ΔE is 2.44%, 0°C longitudinal KV is 76J, cycle toughness value σ a ·Δε t 33.06J / cm 3 . The above indicators are better than the five performance indicators of anti-seismic steel.

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Abstract

The invention discloses anti-seismic H-type steel which comprises the following chemical components in percentage by weight: 0.16-0.20 percent of C, 0.4-0.5 percent of Si, 1.3-1.5 percent of Mn, 0.06-0.08 percent of V, 0.02-0.04 percent of Nb, less than or equal to 0.025 of P, less than or equal to 0.015 of S, less than or equal to 100ppm of N, less than or equal to 100ppm of O, and the balance of Fe and impurity elements. A production method of the anti-seismic H-type steel comprises the procedures of heating, rolling and cooling and is characterized in that the heating temperature is 1210 DEG C-1250 DEG C; the rolling technique is as follows: the controlled rolling temperature at unrecrystallized areas is less than or equal to 950 DEG C, the accumulated deformation for passes is 50-70%, and the final rolling temperature is controlled to be 820 DEG C-880 DEG C; and after rolling, air cooling is carried out by utilizing a cold bed until the temperature of the product is room temperature.

Description

technical field [0001] The invention belongs to the field of low-alloy steel, and in particular relates to a steel for hot-rolled H-shaped steel with high anti-seismic performance and a production method thereof Background technique [0002] In recent years, with the rapid development of urban construction, high-rise, super high-rise and long-span steel structure buildings are a development trend, which has higher performance requirements for construction steel. In addition to improving the strength level of steel, it is also proposed Some special requirements such as anti-seismic performance have been imposed. The steel used in high-rise buildings is mainly steel plate and section steel, among which hot-rolled H-section steel accounts for a large proportion of steel used in high-rise buildings. At the same time, steel structures based on hot-rolled H-beams have been widely used in large-scale industrial plants and urban high-rise buildings due to their scientific and reaso...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/12B21B37/74
Inventor 吴结才盛光敏龚庆华吴保桥
Owner MAANSHAN IRON & STEEL CO LTD
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