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High-strength and high-weldability steel bar

A weldable and high-strength technology, applied in the field of steel bars, can solve problems such as poor welding performance, achieve excellent welding performance, avoid the reduction of mechanical properties and corrosion resistance, and reduce the effect of impact.

Inactive Publication Date: 2016-05-18
广西丛欣实业有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a high-strength and high-weldability steel bar, which can solve the problem of poor weldability in existing high-strength steel bars

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] The high-strength and high-weldability steel bar of this embodiment has the following chemical composition in mass percentage: C0.06%, Mn0.4%, Si0.3%, V0.05%, Ti0.5%, Nb0.05%, Ni0.01, Cr0.2%, Mo0.1%, Cu0.2%, the rest are Fe and unavoidable impurities, among them, S≦0.005% and P≦0.005% in the unavoidable impurities.

[0012] During production, hot metal desulfurization is adopted, converter smelting adopts double slag method for dephosphorization, converter top and bottom blowing argon for refining, vacuum treatment after furnace, calcium treatment after vacuum treatment; continuous casting of billets, the billets are sent to the heating furnace for heating , carry out rough rolling and finish rolling, and control the cooling of the steel bars obtained by the finish rolling until the temperature of the steel bars is 680-700 ° C, and air-cool to room temperature to obtain the product.

[0013] The properties of the high-strength and high-weldability steel bars in this emb...

Embodiment 2

[0015] The high-strength and high-weldability steel bar of this embodiment has the following chemical composition in mass percentage: C0.08%, Mn0.6%, Si0.15%, V0.06%, Ti0.01%, Nb0.04%, Ni0.015, Cr0.3%, Mo0.15%, Cu0.3%, and the rest are Fe and unavoidable impurities, among them, S≦0.005% and P≦0.005% in the unavoidable impurities.

[0016] During production, hot metal desulfurization is adopted, converter smelting adopts double slag method for dephosphorization, converter top and bottom blowing argon for refining, vacuum treatment after furnace, calcium treatment after vacuum treatment; continuous casting of billets, the billets are sent to the heating furnace for heating , carry out rough rolling and finish rolling, and control the cooling of the steel bars obtained by the finish rolling until the temperature of the steel bars is 680-700 ° C, and air-cool to room temperature to obtain the product.

[0017] The properties of the high-strength and high-weldability steel bars in ...

Embodiment 3

[0019] The high-strength and high-weldability steel bar of this embodiment has the following chemical composition in mass percentage: C0.1%, Mn0.5%, Si0.5%, V0.08%, Ti0.04%, Nb0.01%, Ni0.02, Cr0.5%, Mo0.2%, Cu0.5%, the rest are Fe and unavoidable impurities, among them, S≦0.005% and P≦0.005% in the unavoidable impurities.

[0020] During production, hot metal desulfurization is adopted, converter smelting adopts double slag method for dephosphorization, converter top and bottom blowing argon for refining, vacuum treatment after furnace, calcium treatment after vacuum treatment; continuous casting of billets, the billets are sent to the heating furnace for heating , carry out rough rolling and finish rolling, and control the cooling of the steel bars obtained by the finish rolling until the temperature of the steel bars is 680-700 ° C, and air-cool to room temperature to obtain the product.

[0021] The properties of the high-strength and high-weldability steel bars in this emb...

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PUM

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Abstract

The invention discloses a high-strength and high-weldability steel bar and relates to the technical field of steel bars. The high-strength and high-weldability steel bar comprises, by mass, 0.06-0.1% of C, 0.4-0.6% of Mn, 0.15-0.5% of Si, 0.05-0.08% of V, 0.01-0.05% of Ti, 0.01-0.05% of Nb, 0.01-0.02% of Ni, 0.2-0.5% of Cr, 0.1-0.2% of Mo, 0.2-0.5% of Cu, and the balance Fe and inevitable impurities. The inevitable impurities comprise 0-0.005% of S and 0-0.005% of P. By the adoption of the high-strength and high-weldability steel bar, the problem that an existing high-strength steel bar is poor in weldability is solved.

Description

technical field [0001] The invention relates to the technical field of steel bars, in particular to a high-strength and high-weldability steel bar. Background technique [0002] Steel bars are widely used in various modern building structures. The performance of steel bars has a direct impact on the safety performance and life of concrete building structures. With the development of high-rise buildings and long-span structures and the prevention of geological disasters Demand, the construction industry puts forward higher requirements for the strength of steel bars. Compared with traditional ordinary steel bars, the existing high-strength steel bars have better mechanical properties, which can effectively ensure the quality of the project, and at the same time, reduce the use of steel bars It is beneficial to save steel and reduce the cost of engineering materials. Ordinary steel bars can be arranged at a certain interval in the vertical and horizontal directions, and all i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C38/18C22C38/16C22C38/14C22C38/12C22C38/08C22C38/04C22C38/02
CPCC22C38/18C22C38/02C22C38/04C22C38/08C22C38/12C22C38/14C22C38/16
Inventor 王剑平王雪峰
Owner 广西丛欣实业有限公司