Yield strength 100MPa grade building earthquake-resistance low-yield strength steel and method for producing same

Abstract

The invention provides low-yield strength building earthquake-resistance steel, which comprises the following chemical components (in weight percentage): less than or equal to 0.01 percent of C, less than or equal to 0.02 percent of Si, 0.05 to 0.10 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 impurities. 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 80 to 120MPa, 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...

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Problems solved by technology

[0014] It can be seen from the above table 1 that the chemical composition and production process of comparative steel 1-3 are relatively complicated, and there is no clear requirement for the yield strength ratio