CN113702120A

CN113702120A - Device and method for extracting inclusions in steel

Info

Publication number: CN113702120A
Application number: CN202110800667.XA
Authority: CN
Inventors: 顾超; 包燕平
Original assignee: University of Science and Technology Beijing USTB
Current assignee: University of Science and Technology Beijing USTB
Priority date: 2021-07-15
Filing date: 2021-07-15
Publication date: 2021-11-26

Abstract

The invention discloses a device and a method for extracting inclusions in steel, and particularly relates to the technical field of metal materials. The utility model provides an extraction element of inclusion in steel, includes inside cavity and upper and lower open-ended casing, and the casing is pegged graft and is had the wooden plug, and integrated into one piece has check blend stop in the casing, and the check blend stop is equipped with the filter, wears to be equipped with the pin on the casing. The extraction method comprises the following steps: the method comprises the following steps: putting the extraction device into molten steel in the smelting process, slowly lifting the extraction device out of the molten steel, filtering the molten steel by a filter plate, and separating impurities in the filter plate; taking out the filter plate, and sticking and fixing the impurities on the inner side of the filter plate by using conductive adhesive; and carrying out gold spraying or carbon spraying conductive treatment on the filter plate, and respectively carrying out three-dimensional appearance observation on the conductive adhesive and the impurities on the filter plate by using a scanning electron microscope. The technical scheme of the invention solves the problem that the conventional extraction process cannot rapidly extract the inclusions in the steel, and can be used for rapidly extracting the inclusions in the steel and observing the original appearance of the inclusions.

Description

Device and method for extracting inclusions in steel

Technical Field

The invention relates to the technical field of steel cleanliness detection, in particular to a device and a method for extracting inclusions in steel.

Background

Inclusions in steel are important factors influencing the quality of steel, and along with the progress of steel smelting technology and the improvement of user requirements, the cleanliness of steel is continuously improved, and the number and the size of inclusions in steel are reduced. Under the background, the difficulty of accurately extracting inclusions in steel is gradually increased.

At present, there are two main methods for separating impurities from steel and observing original appearance, one is electrolysis using organic electrolyte, and the other is electrolysis using inorganic electrolyte. The method has the advantages that the electrolysis speed of the inorganic electrolyte is high, the method is suitable for extracting the impurities in large-size samples, and the original appearance of the impurities is damaged greatly; the electrolysis speed of the organic electrolyte is low, the damage to the original shape of the inclusion is low, and the method is suitable for extracting the inclusion in small-size patterns, but the separation of carbide and the inclusion cannot be completed by using the organic electrolyte, and the interference on the three-dimensional shape observation of the inclusion is high.

Disclosure of Invention

The invention aims to provide a device and a method for extracting inclusions in steel, and solves the problem that the inclusions in the steel cannot be extracted quickly by the existing extraction process.

In order to achieve the above purpose, one technical solution of the present invention is as follows: the utility model provides an extraction element of inclusion in steel, includes inside cavity and upper and lower open-ended casing, the open-top of casing and bottom opening part are all pegged graft and are had the wooden plug, still integrated into one piece has many interval distribution's check blend stop in the casing, the top of check blend stop is equipped with the filter, it has a plurality of logical grooves to open on the filter, wear to be equipped with many pins that offset with the filter on the casing.

Furthermore, the filter plate is made of zirconia foamed ceramics.

Through the arrangement, the high-temperature-resistant molten steel can resist high temperature, and is not broken, so that the condition of leaving zirconia impurities in the molten steel is avoided.

According to another technical scheme, the method for extracting the inclusions in the steel comprises the following steps:

s101, putting the extraction device into molten steel in a smelting process, slowly lifting the extraction device out of the molten steel, and filtering the molten steel by a filter plate at the bottom of the extraction device so as to separate impurities in the filter plate;

s103, after the extraction device is cooled, taking out the filter plate, and sticking and fixing the impurities on the inner side of the filter plate by using a conductive adhesive;

and S105, performing gold spraying or carbon spraying conductive treatment on the filter plate, and performing three-dimensional appearance observation on the conductive adhesive and the impurities on the filter plate respectively by using a scanning electron microscope.

Compared with the prior art, the beneficial effect of this scheme:

this scheme can simple efficient extract the oxide inclusion in the separation molten steel to keep the original appearance of oxide inclusion in the molten steel to the at utmost, with the original appearance separation extraction inclusion of current electrolytic process and compare, very big reduction the electrolysis method consuming time and to the destruction of inclusion, this scheme is through the filter of changing different apertures, can realize the separation to the not unidimensional oxide inclusion simultaneously.

Drawings

FIG. 1 is a sectional view of an apparatus for extracting inclusions in steel according to the present invention;

fig. 2 is a cross-sectional view a-a of fig. 1.

Detailed Description

The present invention will be described in further detail below by way of specific embodiments:

reference numerals in the drawings of the specification include: the device comprises a shell 1, a wooden plug 2, a grid barrier strip 3, a filter plate 4 and a pin 5.

As the extraction element of inclusion in steel that fig. 1 and fig. 2 show, including inside cavity and upper and lower open-ended casing 1, casing 1 adopts No. 45 steel, the open-top of casing 1 and bottom opening part are all pegged graft and are had wooden plug 2, still integrated into one piece has many interval distribution's check blend stop 3 in the casing 1, the check are kept off and are transferred and are adopted No. 45 steel, the top conflict of check blend stop 3 has filter 4, filter 4 is the foamed ceramic of zirconia material, it has a plurality of logical grooves to open on the filter 4. Wear to be equipped with many pins 5 that offset with filter 4 on the casing 1, many pins 5 circumference distribute on casing 1.

A method for extracting inclusions in steel comprises the following steps: the method comprises the following steps:

s101, putting the extraction device into a refining furnace in a smelting process, wherein steel slag above molten steel can be prevented from entering the extraction device by means of the wooden plug 2, the wooden plug 2 can be dissolved after entering the molten steel, after the molten steel enters the extraction device, the extraction device is slowly lifted out of the molten steel, and the molten steel is filtered by a filter plate 4 at the bottom of the extraction device, so that impurities are separated in the filter plate 4;

s103, after the extraction device is cooled, taking out the filter plate 4, and sticking and fixing the impurities on the inner side of the filter plate 4 by using conductive adhesive;

and S105, performing gold spraying or carbon spraying conductive treatment on the filter plate 4, and performing three-dimensional appearance observation on the conductive adhesive and the impurities on the filter plate 4 by using a scanning electron microscope.

The foregoing are merely examples of the present invention and common general knowledge of known specific structures and/or features of the schemes has not been described herein in any greater detail. It should be noted that, for those skilled in the art, without departing from the structure of the present invention, several changes and modifications can be made, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicability of the patent. The scope of the claims of the present application shall be determined by the contents of the claims, and the description of the embodiments and the like in the specification shall be used to explain the contents of the claims.

Claims

1. The utility model provides an extraction element of inclusion in steel which characterized in that: including inside cavity and upper and lower open-ended casing, the open-top of casing and bottom opening part are all pegged graft and are had the wooden plug, still integrated into one piece has many interval distribution's check blend stop in the casing, the top of check blend stop is equipped with the filter, it has a plurality of logical grooves to open on the filter, wear to be equipped with many pins that offset with the filter on the casing.

2. The apparatus for extracting inclusions from steel as set forth in claim 1, wherein: the filter plate is made of zirconia foam ceramic.

3. A method for extracting inclusions in steel comprises the following steps: the method is characterized in that: the method comprises the following steps:

s101, putting the extraction device of claim 1 or 2 into molten steel in a smelting process, slowly lifting the extraction device out of the molten steel, and filtering the molten steel by a filter plate at the bottom of the extraction device so as to separate impurities in the filter plate;