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A kind of hi-b steel manufactured by inherent inhibitor method and slab low temperature heating process

A technology of heating process and inhibitor, which is applied in the field of silicon steel production, can solve problems such as the inability to produce Hi-B steel, insufficient inherent inhibitory power, and complicated production process, so as to promote the development of secondary recrystallization, wide range of process adaptability, The effect of increasing the amount of precipitation

Active Publication Date: 2019-04-02
ZHONG NAT ENG & RES CENT
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to overcome the problem that the existing low-temperature heating process of casting slabs, the inherent inhibitory force of the precipitation in the steel is insufficient, and Hi-B steel cannot be produced; at the same time, it overcomes the more complex production process and harsh control of the inhibitor method. To solve such problems, provide a kind of Hi-B steel manufactured by inherent inhibitor method and slab low-temperature heating process, and obtain a kind of high-quality magnetic properties through optimal composition design, reasonable combination of inhibitors and control of γ-phase content in steel Hi-B steel

Method used

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  • A kind of hi-b steel manufactured by inherent inhibitor method and slab low temperature heating process
  • A kind of hi-b steel manufactured by inherent inhibitor method and slab low temperature heating process
  • A kind of hi-b steel manufactured by inherent inhibitor method and slab low temperature heating process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0050] Example 1 uses the ingredients in Table 1 as raw materials, and adopts a converter for smelting, and the tapping temperature of the converter is 1650°C.

[0051] RH refining adopts alloy fine-tuning twice, the leakage of the vacuum pump system is less than 25Kg, and the vacuum degree is less than or equal to 266Pa. The starting temperature of the RH treatment molten steel is 1635°C, and the treatment end temperature is 1565°C.

[0052] In the continuous casting process, refractory materials are used for the tundish, and carbon-free refractory materials are used for the submerged nozzle of the crystallizer. The long nozzle is protected by argon blowing, and the temperature is measured for 4 to 5 minutes, 20 minutes, and 35 minutes during normal casting. The insertion depth of the thermocouple is 145mm and must be inserted in the middle. The distance between the temperature measuring head and the surrounding wall should be ≥ 250mm. When pouring, the long nozzle must be w...

Embodiment 2

[0061] The ingredients of Example 2 are as shown in Table 1, and all the other steps are the same as in Example 1.

[0062] Finished product average magnetic induction value B 8 is 1.936T, the average iron loss value P 17 / 50 It is 1.057W / kg.

Embodiment 3

[0064] (1) The composition of Example 3 is shown in Table 1, and the tapping temperature of the converter is 1660°C.

[0065] (2) RH refining adopts two times of alloy fine-tuning, the leakage of the vacuum pump system is less than 25Kg, and the vacuum degree is less than or equal to 266Pa. The starting temperature of RH treatment molten steel is 1640℃, and the treatment end temperature is 1570℃.

[0066] (3) In the continuous casting process, the refractories used for the tundish and the submerged nozzle of the crystallizer are made of carbon-free refractories. The long nozzle is protected by argon blowing, and the temperature is measured for 4 to 5 minutes, 20 minutes, and 35 minutes during normal casting. The insertion depth of the thermocouple is 145mm and must be inserted in the middle. The distance between the temperature measuring head and the surrounding wall should be ≥ 250mm. When pouring, the long nozzle must be worn to protect the casting with argon blowing at the...

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Abstract

The present invention belongs to the technical field of silicon steel production, and in particular relates to a Hi-B steel produced using an intrinsic inhibitor method and a casting blank low-temperature heating process. The liquid Hi-B steel contains the following chemical components in mass percent: 0.04-0.065% of C, 3.1-3.3% of Si, 0.08-0.60% of Mn, 0.01-0.03% of P, less than or equal to 0.01% of S, 0.025-0.055% of Als, 0.007-0.013% of N, and 0.1-1.0% of Cu. The Hi-B is prepared with a sulfide serving as an auxiliary inhibitor and by means of the casting blank low-temperature heating process. According to the present invention, not only is low-temperature heating used for a casting blank, but also the process is wide in application range and sufficient in inhibition capability; and the Hi-B steel obtained according to the present invention has a value of B8 as high as 1.988T, and a value of P17 / 50 as low as 0.836W / kg.

Description

technical field [0001] The invention belongs to the technical field of silicon steel production, in particular to a Hi-B steel manufactured by adopting an inherent inhibitor method and a billet low-temperature heating process. Background technique [0002] Oriented silicon steel refers to a 3% Si-Fe soft magnetic material with a single {110}<001> texture (ie Goss texture). Because of its complex production process and strict manufacturing technology, it is often called "art" in steel materials. At present, the more mature production processes of Hi-B steel mainly include: first, the production of Hi-B steel by "inherent inhibitor + high-temperature heating process of billet"; the main technical parameters of the technical scheme proposed by JFE for the production of oriented silicon steel are: AlN +Sb+MnSe is used as an inhibitor, and the main components (mass fraction%) of the slab are C0.03~0.055, Si2.9~3.3, Als0.007~0.02, Mn0.06~0.08, N0.004~0.008, S0. 002~0.005, ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/16C21D8/12
CPCC21D8/1222C21D8/1233C21D8/1255C22C38/001C22C38/02C22C38/04C22C38/06C22C38/16
Inventor 仇圣桃项利王海军付兵荣哲李军干勇
Owner ZHONG NAT ENG & RES CENT
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