Corrosion-resistant steel bar and production method of corrosion-resistant steel bar
A production method and technology for steel bars, which are applied in the production of corrosion-resistant steel bars and in the field of corrosion-resistant steel bars, can solve the problems of difficulty in steelmaking and increase in production costs, and achieve the effects of avoiding the reduction of steel plasticity, reducing the difficulty of production, and loose control.
Active Publication Date: 2022-06-21
INST OF RES OF IRON & STEEL JIANGSU PROVINCE +2
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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
Method used
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[0043] The technical solution of the present invention will be further introduced below in conjunction with specific embodiments, but the scope of protection is not limited to the description.
[0044] The present embodiment provides a corrosion-resistant steel bar and a production method for providing the corrosion-resistant steel bar. In this embodiment, through the comprehensive improvement of chemical composition and production process, under the condition of lower production difficulty and production cost, steel bars with better corrosion resistance and mechanical properties are obtained, which greatly improves the wide application of steel bars.
[0045] The chemical composition of the steel bar includes in mass percentage: C: 0.02%-0.08%, Si≤1.0%, Mn≤1.0%, Cr: 4.0%-8.0%, Mo≤2.0%, Cu: 0.3%-0.6% , Ni≤2.0%, N≤0.02%, 0.03%<P≤0.05%, S≤0.01%, the balance is Fe and inevitable impurities.
[0046] In addition, in the chemical composition of the steel bar, Si+Mn≤1.0%, Cr+Mo: 4....
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Abstract
The invention discloses a corrosion-resistant steel bar and a production method of the corrosion-resistant steel bar. Chemical composition of steel bar: C:0.02~0.08%, Si≤1%, Mn≤1%, Cr:4~8%, Mo≤2%, Cu:0.3~0.6%, Ni≤2%, N≤0.02% , 0.03%<P≤0.05%, S≤0.01%, and Si+Mn≤1%, Cr+Mo: 4-8.5%, Cu+Ni+P: 0.5-2.5%, and the balance is iron. In production, the upper limit of sulfur at the end point of pre-desulfurization of molten iron can be 0.002%; the upper limit of carbon in ferrochrome alloy added after converter smelting and tapping is 2.0%; LF furnace refining; RH furnace refining; billet continuous casting; hot continuous rolling; Holmer cooling: first cool to 500±20°C at 4~7°C / s, and then cool to room temperature at ≤1°C / s. The invention has low production difficulty and cost, and excellent corrosion resistance, strength, strength-to-yield ratio and plasticity.
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 a skeleton material, its performance 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. [0003] In a...
Claims
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IPC IPC(8): C22C38/02C22C38/04C22C38/22C22C38/20C22C38/44C22C38/42C21D8/08C22C33/06C22C38/24C22C38/26C22C38/28C22C38/32C22C38/46C22C38/48C22C38/50C22C38/54
CPCC22C38/02C22C38/04C22C38/22C22C38/20C22C38/44C22C38/42C21D8/08C22C33/06C22C38/24C22C38/26C22C38/28C22C38/32C22C38/46C22C38/48C22C38/50C22C38/54C21D2211/005C21D2211/002C21D2211/008
Inventor 陈焕德麻晗白鸿国张宇杨晓伟张珍张海
Owner INST OF RES OF IRON & STEEL JIANGSU PROVINCE