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Steel for high-strength anti-seismic and corrosion-resistant steel bars and its heat treatment process

A high-strength and corrosion-resistant technology, applied in the field of steel for seismic and corrosion-resistant steel bars, can solve the problems of increasing the complexity of the structure, poor seismic effect, and short service life, and achieve uniform grain distribution, significant seismic effect, and use. long life effect

Active Publication Date: 2016-05-11
江苏森林建筑新材料股份有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Steel is widely used in the construction industry, especially for the supporting role of large span and complex structure. Its importance is self-evident. The alloy elements and their content in steel directly affect the mechanical properties of steel, especially the detection structure. safety and anti-seismic performance, but the current existing steel has low strength, low safety factor, poor anti-seismic effect, and short service life. cost, and also increased the complexity of its structure

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] This embodiment provides steel for high-strength anti-seismic and corrosion-resistant steel bars. The chemical composition is: C: 0.02%, Ni: 3.1%, Cr: 1.6%, Si: 2.2%, Ti: 1.8%, Co: 2.7%, Mn: 3.2%, Cu: 4.8%, V: 3.24%, Mo: 5.1%, P: 3.62%, W: 0.51%, Tm: 1.6%, La: 1.7%, Tb : 1.35%, Pr : 1.53%, Er : 1.12%, surplus is Fe; This invention also provides the heat treatment process of this high-strength anti-seismic and corrosion-resistant reinforcement steel, and this process is carried out by the following steps: Step (1): Carry out heat treatment process for the first time first: steel is put into Heat to 1120°C in a high-frequency furnace, keep it warm for 4 hours, and then adopt the first cooling process: first cool with water to 580°C at a rate of 16°C / s, then cool with oil to 260°C at a rate of 8°C / s; then Quenching treatment: Put it in a high-frequency furnace and heat it to 580°C, keep it warm for 1h, put the steel in cooling water and cool it to room temperature; step ...

Embodiment 2

[0027] The present embodiment provides steel for high-strength anti-seismic and corrosion-resistant steel bars: the chemical composition is by mass percentage: C: 0.04%, Ni: 3.5%, Cr: 1.9%, Si: 2.4%, Ti: 2.3%, Co: 2.9%, Mn: 3.5%, Cu: 5.2%, V: 3.26%, Mo: 5.3%, P: 3.68%, W: 0.55%, Tm: 1.8%, La: 1.9%, Tb : 1.38%, Pr : 1.55%, Er : 1.15%, and the balance is Fe; the invention also provides the heat treatment process of the steel for this high-strength anti-seismic and corrosion-resistant steel bar, and the process is carried out in the following steps: step (1): firstly carry out the heat treatment process for the first time: put the steel into Heating in a high-frequency furnace to 1250°C, holding for 6 hours, and then adopting the first cooling process: first cooling with water to 590°C at a rate of 20°C / s, then cooling with oil to 280°C at a rate of 12°C / s; then Carry out quenching treatment: put it in a high-frequency furnace and heat it to 600°C, keep it warm for 2 hours, put...

Embodiment 3

[0029] The present embodiment provides steel for high-strength anti-seismic and corrosion-resistant steel bars: the chemical composition is by mass percentage: C: 0.03%, Ni: 3.4%, Cr: 1.8%, Si: 2.3%, Ti: 2.2%, Co: 2.9%, Mn: 3.3%, Cu: 5.1%, V: 3.25%, Mo: 5.2%, P: 3.65%, W: 0.54%, Tm: 1.7%, La: 1.8%, Tb : 1.36%, Pr : 1.54%, Er : 1.13%, surplus is Fe; This invention also provides the heat treatment process of steel for this high-strength anti-seismic and corrosion-resistant steel bar, and this process is carried out by the following steps: Step (1): Carry out heat treatment process for the first time first: steel is put into Heating to 1122°C in a high-frequency furnace, keeping it warm for 5 hours, and then using the first cooling process: first cooling with water to 585°C at a rate of 18°C / s, then cooling with oil to 270°C at a rate of 11°C / s; then Quenching treatment: Put it in a high-frequency furnace and heat it to 590°C, keep it warm for 1.2h, put the steel in cooling wat...

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Abstract

The invention discloses steel for a high-strength anti-shaking anti-corrosion reinforcing steel bar and a thermal treatment process of the steel. The steel comprises the following chemical components in percentage by mass: 0.12-0.15% of C, 13.5-13.8% of Ni, 5.4-5.8% of Cr, 1.5-1.8% of Si, 1.2-1.5% of Mn, 1.8-2.2% of Cu, 0.56-0.58% of V, 0.21-0.28% of Mo, 0.036-0.038% of P, 0.65-0.68% of W, 0.16-0.18% of composite rare earth, and the balance of Fe. The steel for the high-strength anti-shaking anti-corrosion reinforcing steel bar is not only high in strength, long in service life, low in production cost, simple in thermal treatment process and high in working efficiency, but also remarkable in anti-shaking effect, good in corrosion resistance and high-temperature resistance, the use amount of the steel can be reduced in practical application, the design requirements can be met, the consumption of steel is reduced, the complex degree of a structure is reduced, and the construction is simple.

Description

technical field [0001] The invention relates to steel for anti-seismic and corrosion-resistant steel bars, in particular to steel for high-strength anti-seismic and anti-corrosion steel bars and heat treatment process thereof. Background technique [0002] Steel is widely used in the construction industry, especially for the supporting role of large span and complex structure. Its importance is self-evident. The alloy elements and their content in steel directly affect the mechanical properties of steel, especially the detection structure. safety and anti-seismic performance, but the current existing steel has low strength, low safety factor, poor anti-seismic effect, and short service life. The cost is increased, and the complexity of its structure is also increased. Contents of the invention [0003] The technical problem to be solved by the present invention is to propose steel for high-strength anti-seismic and corrosion-resistant steel bars and its heat treatment pro...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/46C21D6/00C21D1/78C21D1/773
CPCC21D1/773C21D1/78C21D6/004C21D6/005C21D6/008C22C38/002C22C38/005C22C38/02C22C38/04C22C38/105C22C38/14C22C38/16
Inventor 姚圣法吴海洋
Owner 江苏森林建筑新材料股份有限公司
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