Method for producing hi-b steel using inherent inhibitor method and slab low temperature heating process

A heating process and casting billet technology, applied in the field of silicon steel production, can solve the problems of complex production process, insufficient inherent inhibitory force, harsh control, etc., and achieve the effect of wide range of process adaptation, reduction of equilibrium precipitation, and expansion of the range.

Active Publication Date: 2018-08-10
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 cast slab, the inherent inhibitor force of precipitation in steel is insufficient; at the same time, to overcome the problems of more complex production process and harsh control by using the method of obtaining inhibitor, and provide a method using inherent The method of producing Hi-B steel by inhibitor method and slab low-temperature heating process aims to use the existing production equipment of iron and steel enterprises, through the optimal design of components, the reasonable combination of inhibitors, the appropriate formulation of hot rolling and normalization processes, and the steel A production method of Hi-B steel with excellent magnetic properties obtained by using traditional slab production technology by means of controlling the content of medium γ phase

Method used

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  • Method for producing hi-b steel using inherent inhibitor method and slab low temperature heating process
  • Method for producing hi-b steel using inherent inhibitor method and slab low temperature heating process
  • Method for producing hi-b steel using inherent inhibitor method and slab low temperature heating process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] 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.

[0075] 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.

[0076]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 wo...

Embodiment 2

[0084] The ingredients of Example 2 are as shown in Table 1, and all the other steps are the same as in Example 1.

[0085] 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

[0087] (1) The composition of Example 3 is shown in Table 1, and the tapping temperature of the converter is 1660°C.

[0088] (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℃.

[0089] (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 invention belongs to the technical field of silicon steel production, and particularly relates to a method for producing Hi-B steel through an intrinsic inhibitor method and a casting blank low-temperature heating process. The method comprises the steps of converter smelting, RH refining, continuous casting, plate blank heating, hot rolling, normalizing, cold rolling, decarburizing annealing and high-temperature annealing. Casting blanks are subjected to low-temperature heating, and the process is wide in application range, and the inhibiting ability is sufficient; and according to the Hi-B steel obtained through the method, the B<8> value is up to 1.988 T, and P<17 / 50> is as low as 0.836 W / kg.

Description

technical field [0001] The invention belongs to the technical field of silicon steel production, and in particular relates to a method for producing Hi-B steel 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 high magnetic induction oriented silicon steel (Hi-B steel) mainly include: first, the production of Hi-B steel by "inherent inhibitor + high-temperature heating process of billet"; the technical plan for the production of oriented silicon steel proposed by JFE The characteristics of the main technical parameters are: AlN+Sb+MnSe as the inhibitor, the main components (mass fraction%) of the slab are C0.03~0...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C38/02C22C38/04C22C38/06C22C38/16C21D8/12C21D1/74C21C7/10B22D11/00
CPCB22D11/001C21C7/10C21D1/74C21D6/008C21D8/1222C21D8/1233C21D8/1255C21D8/1272C22C38/02C22C38/04C22C38/06C22C38/16
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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