Corrosion-resistant steel bar and production method of corrosion-resistant steel bar

Abstract

The invention discloses a corrosion-resistant steel bar and a production method of the corrosion-resistant steel bar. Chemical components of the steel bar comprise 0.02%-0.08% of C, not larger than 1% of Si, not larger than 1% of Mn, 4%-8% of Cr, not larger than 2% of Mo, 0.3%-0.6% of Cu, not larger than 2% of Ni, not larger than 0.02% of N, larger than 0.03% and not larger than 0.05% of P, not larger than 0.01% of S, not larger than 1% of Si + Mn, 4%-8.5% of Cr + Mo, 0.5%-2.5% of Cu + Ni + P and the balance iron. In production, the sulfur upper limit at the end point of molten iron pre-desulfurization can be 0.002%; the carbon upper limit of added ferrochrome after converter smelting tapping is finished is 2.0%; LF furnace refining is carried out; RH furnace refining is carried out; square billet continuous casting is carried out; hot continuous rolling is carried out; and Stelmor cooling is carried out, wherein cooling is firstly carried out to 500 + / -20 DEG C at the speed of 4-7 DEG C / s, and then cooling is carried out to room temperature at the speed smaller than or equal to 1 DEG C / s. The production difficulty and cost are low, and corrosion resistance, strength, the yield ratio and plasticity are all excellent.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and relates to a corrosion-resistant steel bar and a production method of the corrosion-resistant steel bar. Background technique [0002] Reinforced concrete structure is the most important structural method in infrastructure construction. As the skeleton material, the performance of steel bar affects the life of the concrete structure, which in turn affects the safety of the building structure. With the development of society, buildings will gradually expand to areas with harsh geological environments such as coastal areas, deep seas, polar regions, and inland areas. The mechanical properties and corrosion resistance of building materials, especially steel bars for concrete structures, are facing more stringent requirements. Therefore, how to improve the mechanical properties and corrosion resistance is also an important research topic in the production of steel bars for concrete structures....

AI Technical Summary

Problems solved by technology

For example, in the existing technology, a large amount of alloying elements are added, or the content range of elements is strictly required, which leads to the difficulty of steelmaking and the increase of production cost

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