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Slit nozzle and high silicon steel strip manufacturing method

A technology of slit nozzle and manufacturing method, which is applied in the direction of spraying device, spraying device, metal material coating process, etc., can solve the problems that the fluctuation of Si concentration in high silicon steel strip cannot be fully suppressed, and achieve the effect of small fluctuation

Pending Publication Date: 2021-06-01
JFE STEEL CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] However, in the production methods of the above-mentioned Patent Documents 2 and 3, the fluctuation of Si concentration in the strip width direction of the high-silicon steel strip cannot be sufficiently suppressed.

Method used

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  • Slit nozzle and high silicon steel strip manufacturing method
  • Slit nozzle and high silicon steel strip manufacturing method
  • Slit nozzle and high silicon steel strip manufacturing method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0067] [Example 1: Evaluation of the position of the opening portion on the rectifier]

[0068]

[0069] Prepare outer tube (inner diameter: 120mm, outer diameter: 140mm, spray port of processing gas: 70cm (axial) × 10mm (direction to axially vertical)), inner tube (inner diameter: 60 mm, outer diameter: 70mm) and Rectifier plate 1. Then, the inner tube is disposed in the outer tube inside the outer tube in the center of the outer tube in the center of the outer tube, and the open end surface of the inner tube is disposed. figure 2 The slit nozzle 1 shown. Here, the wall of the closed end of the outer tube is set to 25 mm from the plane of the open end of the inner tube.

[0070] Three openings will be described later on the rectifier plate 1. In addition, the size of the three openings is equal. The three opening portions of the entire casting plate 1 are each having a width W1 of the opening 10 mm, and the opening degree A1 of the opening portion is 50 ° (see Figure 4 . In addi...

Embodiment 2

[0082] [Example 2: Rating the flow rate evaluation of the processing gas when the slit nozzle is alternately configured]

[0083] The slit nozzle 3 (the present invention) is disposed in such a manner that the supply port of the treatment gas is alternately different orientation (direction of the opposite side). Here, it is configured such that the position of the discharge port (slit) of the two slit nozzles 1 is configured in the manner in which the steel strip is consistent.

[0084] Further, in the two slit nozzles, one gas nozzle supplies the treatment gas from the supply gas supply port at a flow rate of 1.5 m / sec, and the other is supplied from the supply gases from the flow rate of 3.0 m / sec. Gas, measure the flow rate of the processing gas blown from the discharge port of the treatment gas. As the processing gas in the flow rate, nitrogen is used. Further, the flow rate at the axial position of the two slit nozzles is determined, and the flow rate of the flow rate at ...

Embodiment 3

[0089] [Example 3: Manufacturing evaluation of high silicon steel strips]

[0090] Prepare silicon steel strips (plate thickness: 100μm, plate width: 600mm, Si concentration: 3.4% by mass, Young's modulus: 210GPa (normal temperature)), pass Figure 5 The continuous manufacturing line shown has a high silicon steel strip having a silicon having a silicon volume of 6.5% by mass.

[0091] In the manufacture of high silicon steel strips in the examples of the present invention, Figure 5 In the continuous manufacturing line shown, in the wafers, in the case where the supply of the treatment gas is alternately different or the supply port is alternately different (the direction of the opposite side), the surface and the back surface of the strip. Two Example 1 The slit Nozzle 3 (Example) of the present invention). Further, in the same manner as in Example 2, two slit nozzles were disposed in the direction of the panel, and a gas nozzle supplied from the supply gas supplied from the suppl...

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Abstract

The purpose of the present invention is to provide a slit nozzle having a double tube structure with which it is possible to suppress variation in the flow rate of gas blown out in the axial direction. Another purpose of the present invention is to provide a method which makes it possible to stably manufacture a high silicon steel strip that has low variation in Si concentration in the plate width direction. This slit nozzle 10 has a double tube structure and comprises, in a space between an open end of the inner tube 30 and an end of a discharge port 21 on the open end side, a flow regulating plate 40 which blocks a space between the inner tube 30 and an outer tube 20. In the surface of the slit nozzle where the flow regulating plate 40 is provided, an opening 41 is provided only in a region of the flow regulating plate 40 where a center angle from a reference line L1 passing through the axial center of the outer tube 20 and the center in the width direction of the discharge port 21 is 27.5 degrees to 332.5 degrees.

Description

Technical field [0001] The present invention relates to a method for producing a slit nozzle and a high silicon steel strip. In more detail, the present invention relates to a slit nozzle having a double tube structure having a dual tube structure having a fluctuation of the blown gas flow of the axial direction and a high silicon steel strip using the slit nozzle. Background technique [0002] As a method of manufacturing a high silicon steel strip having a Si content of 4% by mass or more, there is a silicone treatment method. The manufacturing method is the following method: a thin steel strip containing a Si concentration of less than 4% by mass (SiCl) at a high temperature. 4 The processing gas is penetrated into the steel strip, and the Si penetrating into the surface of the steel strip is diffused in the plate thickness direction by heat treatment, thereby continuously manufacturing high silicon steel strips. [0003] As the method of spraying the treatment gas, it is know...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C10/08
CPCC23C10/08B05B1/005B05B1/044B05B1/30C23C10/00C21D1/767
Inventor 户部辉彦土居崇小关新司
Owner JFE STEEL CORP