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Yield strength 160MPa grade building earthquake-resistance low-yield strength steel and method for producing same

A production method and low yield strength technology, applied in the field of steel manufacturing, can solve the problems of chemical composition of steel and complex production process, and achieve the effects of excellent comprehensive mechanical properties, simple production process and excellent impact toughness

Active Publication Date: 2009-08-26
BAOSHAN IRON & STEEL CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0013] It can be seen from Table 1 that the chemical division and production process of the steel are relatively complicated, and there is no clear requirement for the yield strength ratio

Method used

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  • Yield strength 160MPa grade building earthquake-resistance low-yield strength steel and method for producing same
  • Yield strength 160MPa grade building earthquake-resistance low-yield strength steel and method for producing same
  • Yield strength 160MPa grade building earthquake-resistance low-yield strength steel and method for producing same

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0038] According to the chemical composition of the following table 2, it was smelted in a 500kg vacuum induction furnace in the laboratory. The billet heating temperature is 1180°C, the final rolling temperature is 920-950°C, after rolling, it is air-cooled to 600-750°C for coiling or cooled to room temperature. The rolling thickness is 12mm. The mechanical properties of the obtained steel are shown in Table 3.

[0039] Table 2 The chemical composition of steel in Example 1 (weight %)

[0040]

[0041] Table 3 Mechanical properties of steel in Example 1

[0042]

Embodiment 2

[0044] According to the chemical composition of the following table 4, it was smelted in a 500kg vacuum induction furnace in the laboratory. The billet heating temperature is 1180°C, the final rolling temperature is 900-930°C, and coiled after rolling. The rolling thickness is 16mm. The mechanical properties of the obtained steel are shown in Table 5.

[0045] Table 4 Chemical composition (weight %) of steel of embodiment 2

[0046]

[0047] Table 5 Mechanical properties of steel in Example 2

[0048]

Embodiment 3

[0050] According to the chemical composition of the following table 6, it was smelted in a laboratory 500kg vacuum induction furnace. The billet heating temperature is 1180°C, the final rolling temperature is 870-900°C, and air-cooled after rolling. The rolling thickness is 20mm. The mechanical properties of the obtained steel are shown in Table 7.

[0051] The chemical composition (weight %) of table 6 embodiment 3 steels

[0052]

[0053] Table 7 The mechanical properties of steel in Example 3

[0054]

[0055] It can be seen from the mechanical properties described in Table 3, Table 5 and Table 7 that the steel provided by the present invention has good yield strength, all within 140-180 MPa, and has excellent plasticity, and the elongation exceeds 50%. In addition, from the data of transverse impact energy at 0°C, the impact energy of all samples is above 200J, which shows that the steel provided by the present invention has excellent impact performance.

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Abstract

The invention provides low-yield strength building earthquake-resistance steel, which comprises the following chemical components (in weight percentage): 0.01 to 0.05 percent of C, 0.02 percent of Si, 0.05 to 0.15 percent of Mn, less than or equal to 0.01 percent of P, less than or equal to 0.006 percent of S, 0.01 to 0.05 percent of Al, less than or equal to 0.005 percent of N, 0.01 to 0.10 percent of Ti, and the balance of Fe and inevitable impurity elements. The invention also provides a method for producing the earthquake-resistance steel. The earthquake-resistance steel has excellent comprehensive mechanical properties, a yield strength of 140 to 180MPa, an elongation of more than 50 percent, excellent plastic deformation capacity, excellent zero degree centigrade impact toughness, an excellent low cycle fatigue property and excellent welding performance, and is suitable to be used in building earthquake-resistance design to protect main buildings and is simple in production process, low in cost and suitable for large-scale production.

Description

technical field [0001] The invention belongs to the field of iron and steel manufacturing, specifically, the invention relates to the field of ultra-low carbon steel manufacturing, and more specifically, the invention relates to anti-seismic steel and a production method thereof. Background technique [0002] Millions of earthquakes occur every year on the earth. As an earthquake-prone country, nearly 400 earthquakes of magnitude 6 or above occurred in my country in the 20th century, causing a large number of casualties and property losses. Disasters caused by earthquakes have aroused people's attention to the earthquake resistance of buildings. In recent years, great progress has been made in engineering anti-seismic research, and the anti-seismic performance of steel for engineering structures has also received increasing attention. [1，2] At present, a series of high-performance structural anti-seismic steels have been developed and applied to the construction of high-ris...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/14C21D1/78
Inventor 宋凤明温东辉李自刚柏明卓
Owner BAOSHAN IRON & STEEL CO LTD
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