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A multi-element nitrided alloy cored wire and its application and application method in the strengthening treatment process of hrb400 steel

A technology of nitriding alloy and strengthening treatment, which is applied in the field of nitriding alloy cored wire and its application in HRB400 steel strengthening treatment process, and can solve the problems of low effective utilization rate, high cost, and inability to give full play to the strengthening effect. , to achieve the effect of improving the strengthening effect, improving the strengthening effect and stability

Active Publication Date: 2017-11-21
马鞍山中科冶金材料科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Aiming at the problems of low effective utilization rate of vanadium, insufficient strengthening effect, poor stability and high cost in the existing molten steel microalloying process, the present invention provides a nitrided alloy cored wire and its strengthening treatment process for HRB400 steel In the application and application method, the present invention adds beneficial elements such as Si, Mn, Ti, B, etc. in the nitrided alloy cored wire, which are beneficial to transfer N to V and combine with it, and at the same time have a positive correlation effect on steel performance strengthening , and in the molten steel refining process, adopting a method completely different from the current process to carry out nitriding alloy microalloying treatment on molten steel, the multi-element nitrided alloy composition of the present invention matches the requirements of HRB400 steel microalloying strengthening process very well, that is Fully guarantee the supply of N element and take into account the positive correlation of each alloy element, so that the strengthening effect can be fully exerted

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: 30%, V: 9%, Si: 41.2%, Mn: 4.7%, Ti: 2.6%, B : 3.5%, C: 0.12%, P: 0.07%, S: 0.06%, the balance is Fe and trace impurities, broken into small particles of 0.01 ~ 4.5mm; the above fractions are mass fractions.

[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%, the balance is Fe, and the thickness is 0.65 mm; the above fractions are mass fractions.

[0039] (3) the processing material in step (1) and the steel strip in step (2) are coated with a cored wire unit into cored wire.

[0040] (4) The multi-element nitrided alloy cored wire processed and 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 180 tons, the smelting steel is HRB400, and its refining process is: (a) Tapping at the end of ...

Embodiment 2

[0052] (1) Select a multi-element nitrided alloy whose composition is: N: 21%, V: 28%, Si: 29%, Ti: 4.0%, Mn: 6.0%, C: 0.9%, S: 0.10%, P : 0.08%, the balance is Fe and trace impurities, broken into small particles of 0.01 ~ 4.5mm; the above fractions are mass fractions.

[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%, the balance is Fe, and the thickness is 0.30 mm.

[0054] (3) the processing material in step (1) and the steel strip in step (2) are coated with a cored wire unit into cored wire.

[0055] (4) The multi-element nitrided alloy cored wire processed and 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 120 tons, the smelting steel is HRB400, 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 composi...

Embodiment 3

[0067] (1) Select a multi-element nitrided alloy whose composition is: N: 26.1%, V: 19.3%, Si: 45%, Mn: 0.05%, B: 1.4%, C: 1.3%, P: 0.1%, S : 0.06%, 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: 1.3%, and the thickness is 0.56mm.

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

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

[0071] (5) Choose a converter with a nominal capacity of 220 tons, the smelting steel is HRB400, 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 steel: C: 0.06-0.12%, P ≤0.025%, S≤0.02...

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Abstract

The invention discloses a multi-element nitralloy core-spun yarn and an application and an application method of the same to an HRB400 steel reinforcing treatment technology and belongs to the technical field of alloy material application. The yarn core of the multi-element nitralloy core-spun yarn comprises the following components (based on a percent by mass): 21-30% of N, 9-28% of V, 29-45% of Si, 0.05-6% of Mn, 0-4.0% of Ti, 0-3.5% of B, 0.12-1.3% of C, not larger than 0.10% of P, not larger than 0.10% of S and the balance of Fe and unavoidable impurities. The multi-element nitralloy component fully meets the requirements of the HRB400 steel micro-alloying reinforcing technology, the supply of N elements is fully ensured, and the positive correlation properties of all alloy elements are combined. Nitralloy micro-alloying treatment is carried out on molten steel by a technical method fully different from the traditional one, and the reinforcing effect of the multi-element nitralloy component is fully exerted. The multi-element nitralloy component has the advantages of being great in reinforcing effect, high in technical stability, high in target steel yield rate and the like.

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 application method in HRB400 steel strengthening treatment process. Background technique [0002] HRB400 is hot-rolled ribbed steel bar, which means that the surface of steel bar is deformed by hot rolling process to increase the bite force between it and concrete, including surface ribbed steel bar, spiral steel bar, herringbone steel bar, crescent steel bar, etc. "Code for Design of Concrete Structures" recommends high-quality HRB400 grade steel bars and high-strength, low-relaxation prestressed steel strands as the main reinforcement bars for concrete structure reinforcement. Among them, weldable and seismic steel bars not only require yield strength ≥ 400MPa, but also tensile strength The strength is ≥570MPa, and the ratio of the measured tensile strength to the measured yield strength is a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C21C7/00C22C30/00C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14C22C33/04
CPCC21C7/0056C22C30/00C22C33/04C22C38/001C22C38/02C22C38/04C22C38/06C22C38/12C22C38/14
Inventor 陈来祥
Owner 马鞍山中科冶金材料科技有限公司
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