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Multielement nitralloy cored wire, application of multielement nitralloy cored wire, and production method of HRB500E high-strength aseismic steel

A technology of nitrided alloy and production method, applied in the application field of alloy materials, can solve the problems of poor stability, high cost, low effective utilization rate of vanadium, etc., and achieve the effects of good process stability, sufficient strengthening effect and high hit rate

Inactive Publication Date: 2016-03-30
马鞍山中科冶金材料科技有限公司
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  • Summary
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  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problems of low effective utilization rate of vanadium, insufficient strengthening effect, poor stability and high cost in the existing HRB500E steel production process, the present invention provides a multi-element nitrided alloy cored wire and its application and HRB500E high-strength shock-resistant steel production method

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0037] (1) Select a multi-element nitrided alloy whose composition is (all in mass fraction, the same below): N: 22%, V: 21%, Si: 35%, Ti: 5.0%, Mn: 0.5%, B : 3.5%, Cr: 1.9%, C: 1.6%, P: 0.05%, S: 0.06%, the balance is Fe and trace impurities (unavoidable impurities), broken into small particles of 0.01 ~ 4.5mm.

[0038] (2) Choose a bright steel strip, its composition is: C: 0.06%, Si≤0.01%, Mn: 0.035%, P: 0.018%, S: 0.021%, Al: 0.06%, and the thickness is 0.75mm.

[0039] (3) Coating the processed material in step (1) and the steel strip in step (2) into a φ13mm cored wire with a cored wire unit.

[0040] (4) The multi-element nitrided alloy cored wire formed in step (3) is used in the refining process of molten steel in converter steelmaking.

[0041] (5) Choose a converter with a nominal capacity of 120 tons, the smelting steel is HRB500E, and its refining process is: (a) Tapping at the end of the converter (the temperature of the molten steel is controlled at 1680-1690°C...

Embodiment 2

[0052] (1) Select a multi-element nitrided alloy whose composition is (all in mass fraction, the same below): N: 17%, V: 47%, Si: 14%, Ti: 3.6%, B: 6.5%, Mn : 4.1%, Nb: 0.7%, Cr: 0.01%, C: 0.6%, P: 0.10%, S: 0.07%, the balance is Fe and trace impurities broken into 0.01 ~ 4.5mm small particles.

[0053] (2) Choose a bright steel strip, its composition is: C: 0.06%, Si≤0.01%, Mn: 0.032%, P: 0.02%, S: 0.019%, Al: 0.062%, and the thickness is 0.30mm.

[0054] (3) Coating the processed material in step (1) and the steel strip in step (2) into a φ9mm cored wire with a cored wire unit.

[0055] (4) The multi-element nitrided alloy cored wire formed in step (3) is used in the refining process of molten steel in converter steelmaking.

[0056](5) Choose a converter with a nominal capacity of 180 tons, the smelting steel is HRB500E, and its refining process is: (a) tapping at the end of the converter (the temperature of the molten steel is controlled at 1680-1690°C; the composition of...

Embodiment 3

[0067] (1) Select a multi-element nitrided alloy whose composition is: N: 26%, V: 28.9%, Si: 19.1%, B: 0.6%, Ti: 0.3%, Mn: 8.0%, Nb: 4.5%, Cr : 3.0%, C: 0.9%, P: 0.05%, S: 0.10%, the balance is Fe and trace impurities, broken into small particles of 0.01 ~ 4.5mm.

[0068] (2) Choose a bright steel strip, its composition is: C: 0.07%, Si≤0.01%, Mn: 0.03%, P: 0.02%, S: 0.023%, Al: 0.07%, and the thickness is 0.56mm.

[0069] (3) The processing material in the step (1) and the steel strip in the step (2) are coated with a cored wire unit into a φ26mm cored wire.

[0070] (4) The multi-element nitrided alloy cored wire formed in step (3) is used in the refining process of molten steel in converter steelmaking.

[0071] (5) Select a converter with a nominal capacity of 220 tons, the smelting steel type is HRB500E, and its refining process is: (a) tapping at the end of the converter (the temperature of the molten steel is controlled at 1680-1690°C; the composition of the molten ste...

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Abstract

The invention discloses a multielement nitralloy cored wire, an application of the multielement nitralloy cored wire and a production method of HRB500E high-strength aseismic steel, and belongs to the technical field of alloy material applications. A wire core of the multielement nitralloy cored wire comprises the following components (by mass fraction): 17-26% of N, 21-47% of V, 14-35% of Si, 0.6-6.5% of B, 0.3-5.0% of Ti, 0.01-3.0% of Cr, 0-4.5% of Nb, 0.5-8% of Mn, less than or equal to 1.6% of C, less than or equal to 0.10% of P, less than or equal to 0.10% of S, and the balance Fe and unavoidable impurities. With the adoption of multielement nitralloy, sufficient N content can be ensured in a refining process of the HRB500E high-strength aseismic steel, V and B are combined with N(C) fully, and a dissolved precipitation strengthening effect is exerted; in addition, the contents of Si, Mn, Ti, Cr and Nb are adjusted, a best positive correlation strengthening effect is reached; a microalloying technology having least influence factor variable on the steel performance strengthening effect is designed, screened and verified; and the multielement nitralloy cored wire has the advantages that the strengthening effect is most sufficient, the technology stability is good, and a hit rate of the target type of steel is high.

Description

technical field [0001] The invention belongs to the technical field of alloy material application, and more specifically relates to a nitrided alloy cored wire and its application and a production method of HRB500E high-strength shock-resistant steel. Background technique [0002] my country's hot-rolled ribbed steel bars are classified into three grades according to the yield strength grades, namely HRB335, HRB400, and HRB500. The seismic steel bars are added with E after the grades. The hot-rolled ribbed steel bars are divided into There are two types of straight bars and coiled bars, and the coiled steel bars are referred to as coiled snails. HRB500 and HRB500E are high-strength steel bars. Using them instead of HRB335 and HRB335E steel bars can save about 24% of steel materials. Using them instead of HRB400 and HRB400E steel bars can save about 10% of steel materials. In order to meet the needs of the rapid development of the construction industry and speed up the upgrad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C21C7/00C22C29/16
CPCC21C7/0006C21C7/0056C22C29/16
Inventor 陈来祥
Owner 马鞍山中科冶金材料科技有限公司
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