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A kind of ultra-fine grain hrb400e wire rod anti-seismic steel bar and preparation method thereof

An earthquake-resistant steel bar, ultra-fine grain technology, applied in the direction of manufacturing tools, metal rolling, metal rolling, etc., can solve the problem of high production cost, achieve low production cost, significantly refine ferrite grains, and reduce temperature. Effect

Active Publication Date: 2022-05-10
WUKUN STEEL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the problem that the production cost of HRB400E wire rod anti-seismic steel bar is high due to the addition of a certain amount of vanadium alloy in the steel using vanadium microalloying, the present invention aims to provide an ultra-fine-grained HRB400E wire rod with lower cost and higher quality Preparation method of anti-seismic steel bar

Method used

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  • A kind of ultra-fine grain hrb400e wire rod anti-seismic steel bar and preparation method thereof
  • A kind of ultra-fine grain hrb400e wire rod anti-seismic steel bar and preparation method thereof
  • A kind of ultra-fine grain hrb400e wire rod anti-seismic steel bar and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] A. Molten steel smelting: 160kg / t respectively 钢 、30kg / t 钢 The cold material is loaded into the proportion, and the scrap steel (chemical composition: C 0.07wt%, Si 0.15wt%, Mn 0.45wt%, P 0.025wt%, S 0.020wt% is added in the LD converter, and the rest is Fe and Inevitable impurities) and pig iron (chemical composition: C3.5wt%, Si 0.25wt%, Mn 0.35wt%, P0.100wt%, S 0.025wt%, the rest is Fe and unavoidable impurities); Then press 870kg / t 钢 The proportion of molten iron is loaded into the LD converter with the following temperature and mass ratio of molten iron: molten iron temperature 1340 ° C, molten iron composition C4.0wt%, Si 0.20wt%, Mn 0.30wt%, P 0.080wt%, S 0.025wt% , the rest is Fe and unavoidable impurities; scrap steel, pig iron and molten iron are blended into the LD converter, then conventional top-bottom composite blowing is carried out, and conventional lime, lightly burned dolomite and magnesite balls are added to make slag, and the amount of lime added i...

Embodiment 2

[0049] A. Molten steel smelting: 165kg / t respectively 钢 、30kg / t 钢 The cold material is charged into the proportion, and the steel scrap (chemical composition: C 0.17wt%, Si 0.35wt%, Mn 1.25wt%, P 0.035wt%, S 0.030wt% is added to the LD converter with the following mass ratio, and the rest is Fe and Inevitable impurities) and pig iron (chemical composition: C3.6wt%, Si 0.35wt%, Mn 0.45wt%, P0.110wt%, S 0.032wt%, the rest is Fe and unavoidable impurities); Then press 870kg / t 钢 The proportion of molten iron is loaded into the LD converter with the following temperature and mass ratio of molten iron: molten iron temperature 1345°C, molten iron composition C4.1wt%, Si 0.28wt%, Mn 0.40wt%, P 0.090wt%, S 0.031wt% , the rest is Fe and unavoidable impurities; scrap steel, pig iron and molten iron are blended into the LD converter, then conventional top-bottom composite blowing is carried out, and conventional lime, lightly burned dolomite and magnesite balls are added to make slag, a...

Embodiment 3

[0061] A. Molten steel smelting: 170kg / t respectively 钢 、30kg / t 钢 The cold material is loaded into the proportion, and the scrap steel (chemical composition: C 0.26wt%, Si 0.60wt%, Mn 1.50wt%, P 0.045wt%, S 0.040wt% is added in the LD converter, and the rest is Fe and Inevitable impurities) and pig iron (chemical composition: C3.7wt%, Si 0.45wt%, Mn 0.55wt%, P0.118wt%, S 0.040wt%, the rest is Fe and unavoidable impurities); Then press 870kg / t 钢 The proportion of molten iron is loaded into the LD converter with the following temperature and mass ratio of molten iron: molten iron temperature 1360 ° C, molten iron composition C4.2wt%, Si 0.35wt%, Mn 0.50wt%, P 0.100wt%, S 0.038wt% , the rest is Fe and unavoidable impurities; scrap steel, pig iron and molten iron are blended into the LD converter, then conventional top-bottom composite blowing is carried out, and conventional lime, lightly burned dolomite and magnesite balls are added to make slag, and the amount of lime added i...

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Abstract

The invention discloses an ultra-fine-grained HRB400E wire rod anti-seismic steel bar and a preparation method thereof. The steel bar has the following chemical components in parts by weight: C 0.22-0.25 wt%, Si 0.40-0.50 wt%, Mn 0.98-1.13 wt% , S≤0.045wt%, P≤0.045wt%, N 0.0090~0.0110wt%, the rest is Fe and unavoidable impurities. The preparation method is realized according to the following steps in sequence: molten steel smelting, deoxidation alloying, molten steel refining in an argon station, molten steel casting, billet heating and billet controlled rolling and controlled cooling processes. The preparation method of the present invention fully exerts multiple strengthening effects such as fine-grain strengthening, precipitation-strengthening strengthening and microstructure strengthening through the integration and innovation of chemical composition design, converter smelting, deoxidation alloying process, continuous casting, steel rolling heating system, and controlled rolling and controlled cooling process. With the characteristics of process applicability and strong controllability, the indicators of the produced wire rod steel bars are all better than GB / T 1499.2-2018, and the production cost is reduced by 30 yuan / t compared with the existing vanadium microalloying process 钢 The above has improved the market competitiveness of products and has significant economic and social benefits.

Description

technical field [0001] The invention belongs to the technical field of metallurgy, and in particular relates to an ultra-fine-grained HRB400E wire rod anti-seismic steel bar and a preparation method thereof. Background technique [0002] Hot-rolled ribbed steel bar is the main reinforcement material of reinforced concrete building structure, and it carries the stress and strain of loads such as tensile and compressive stress and strain in the structure. At present, the annual output of hot-rolled ribbed steel bars in my country exceeds 200 million tons, and it is the steel material most used in the construction of national economic construction projects. In recent years, with the continuous upgrading of building structures, the strength of steel used has continued to increase, which has promoted the upgrading of building steel bars and the revision and improvement of product standards. The national standard GB / T 1499.2-2018 for hot-rolled ribbed steel bars was officially im...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/60B21B1/16B21B45/02C21C7/00C21C7/06C22B7/00C22B7/04C22B34/22C22C33/06
CPCC22C38/02C22C38/04C22C38/002C22C38/60C22C38/001C22C33/06C21C7/0006C21C7/06C22B7/04C22B7/001C22B34/22B21B1/16B21B45/0224Y02P10/20
Inventor 陈伟张卫强刘林刚吴光耀武天寿张瑜曹云舒云胜张红斌文玉兵
Owner WUKUN STEEL
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