CN218642799U - Slender consumable electrode blank and manufacturing die thereof - Google Patents

Abstract

The utility model discloses a slender consumable electrode blank and a manufacturing mould thereof, wherein the slender consumable electrode blank is formed by connecting two electrode blank sections along axial stitch welding, the difficulty of casting two shorter electrode blank sections is lower than that of directly casting and manufacturing the slender consumable electrode blank, the success rate is high, the manufacturing efficiency of the slender consumable electrode blank can be effectively improved, and the manufacturing cost is reduced; the angle of the electrode billet used for welding the inclined plane is limited within a certain range, and in the electroslag remelting process, when the consumable electrode is melted and approaches to the welding position, because the end of the welding position of the consumable electrode billet is the inclined plane of 45 degrees, the top end of the inclined plane is melted at last, the phenomenon that the consumable electrode at the lower end falls off at the welding position when two electrode billet sections are adopted for stitch welding is avoided, and the metallurgical quality is favorably ensured.

Description

Slender consumable electrode blank and manufacturing die thereof

Technical Field

The utility model belongs to the technical field of special metallurgical engineering, concretely relates to slender type consumable electrode base and preparation mould thereof.

Background

The electroslag remelting technology is a method for smelting by using resistance heat generated when current passes through slag as a heat source, and aims to improve the purity of metal and improve ingot casting crystallization. The traditional electroslag remelting technology adopts a double-supporting-arm exchange normal-pressure electroslag furnace, and the problems of quality defects of an electroslag ingot slag channel and the like are easily caused because the double-supporting-arm exchange normal-pressure electroslag furnace has the defects of asymmetric magnetic field, low thermal efficiency, large loss, element burning loss, poor uniformity of components and structures, remelting in the atmosphere, incapability of effectively controlling the melting speed of a consumable electrode and the like. Therefore, the existing electroslag remelting technology generally adopts a fully-closed protective atmosphere electroslag furnace, so that all metallurgical reaction parameters, such as slag temperature, slag components, molten pool depth, steel slag oxidability and the like, in the whole electroslag remelting process are kept unchanged all the time, the metallurgical reaction and solidification conditions are constant, and a steel ingot with uniform components and high cleanliness is obtained.

For example, the electroslag remelting method for a consumable electrode and the electroslag furnace disclosed in chinese patent CN103602823B, the fully enclosed protective atmosphere electroslag furnace adopts a production mode of remelting one electroslag ingot by one consumable electrode blank; in order to make the electroslag process more stable and the quality segregation less, a consumable electrode blank with smaller taper is generally selected, but the consumable electrode blank with smaller taper is difficult to be directly cast and manufactured by an ingot mold, and the shrinkage cavity after the successful manufacture is also more serious; in order to improve the comprehensive yield of the electroslag ingot, a slender electroslag ingot is mostly adopted, and the pouring and manufacturing of a slender consumable electrode blank used by the slender electroslag ingot are more difficult; the forging manufacturing has the advantages of longer period, lower production efficiency and higher cost.

Therefore, the applicant adopts a mode of firstly casting and manufacturing two sections of shorter consumable electrode blanks, and then flatly welding and butting the two sections of shorter consumable electrode blanks to manufacture a slender consumable electrode blank, but as shown in figure 1, one end of an electroslag ingot 1 remelted by electroslag forms a metal molten pool 2, the inclination angle of the metal molten pool is generally not more than 45 degrees, a liquid slag pool 4 is arranged between the metal molten pool 2 and a consumable electrode tip 3, and most of consumable electrodes 5 melt the end surfaces, namely the angles of the consumable electrode tips 3 and the liquid slag pool 4 are not more than 30 degrees; in the electroslag remelting process, when a consumable electrode melts and approaches a welding position, the surface of the consumable electrode at the lower end melts, the electrode blank which is not melted at the center after a welding material is melted falls off, namely, the rest consumable electrode blank below the welding position falls off, so that the quality problem of dissimilar metals is caused, and the metallurgical quality is influenced.

Disclosure of Invention

An above-mentioned not enough to prior art, the utility model aims to provide a slim type consumable electrode base and preparation mould thereof solves the technical problem that the long and thin type consumable electrode base that the open butt joint formed can take place to fall the piece in the welding department, gains the effect that reduces the slim type consumable electrode base preparation degree of difficulty and improve metallurgical quality.

In order to solve the technical problem, the utility model adopts the following technical scheme:

a slender consumable electrode blank comprises two coaxial electrode blank sections, one end face of each electrode blank section is an inclined plane, the inclined angle of each inclined plane on each electrode blank section is 40-50 degrees, and the two inclined planes on the two electrode blank sections are in parallel, opposite to each other and are welded to each other.

Further, the inclination angle of the inclined plane on the electrode billet is 45 °.

Furthermore, the outer peripheral surface of the electrode billet has a taper, and the inclined surface on the electrode billet is positioned at the large-diameter end of the electrode billet.

Furthermore, two centering grooves are formed in the outer peripheral surface, close to the inclined surface of the electrode blank section, the centering grooves extend to the inclined surface of the electrode blank section along the axial direction of the electrode blank section, and the two centering grooves are located at the top end and the bottom end of the inclined surface respectively.

The utility model also relates to a preparation mould of above-mentioned slender type consumable electrode base, including mould body and moulded die base, have the die cavity that runs through mould body both ends and be the column in the mould body, moulded die base locates die cavity one end, and the axial bulge along the die cavity on the face of moulded die base towards the mould body is formed with the columnar shaping portion, and the shaping portion extends to in the die cavity, and the terminal surface of shaping portion is the inclined plane; and a pouring hole penetrating through the forming part is formed in the surface of the forming die base, which is far away from the die body.

Furthermore, the die cavity has a taper, the forming die base is positioned at the large-diameter end of the die cavity, and the peripheral surface of the forming part has the taper and is matched with the taper of the die cavity.

Furthermore, two centering columns are formed on the end face of the forming portion in a protruding mode in the axial direction of the die cavity, the two centering columns are located at the top end and the bottom end of the end face respectively, and the centering columns are located on the edge of the end face of the forming portion and are coplanar with the outer peripheral face of the forming portion.

Furthermore, a ring-column-shaped refractory part is matched and arranged in the pouring hole, and one end of the refractory part, facing the die body, is an inclined plane and is flush with the end face of the forming part.

Furthermore, the pouring hole has a taper, the large-diameter end of the pouring hole faces the die body, the outer peripheral surface of the refractory piece has a taper, the small-diameter end of the refractory piece faces the die body, the refractory piece is made of refractory materials, and the refractory piece is installed in the pouring hole.

Further, the refractory part adopts high-alumina bricks.

Compared with the prior art, the utility model discloses following beneficial effect has:

1. the utility model relates to a slim consumable electrode base, formed by two electrode base sections along the axial stitch welding connection, the difficulty of pouring two shorter electrode base sections is lower compared with the direct pouring for making slim consumable electrode base, the success rate is high, the making efficiency of slim consumable electrode base can be effectively improved, the making cost is reduced; the angle of the electrode billet for welding the inclined plane is limited to 45 degrees, and the top end of the inclined plane of the consumable electrode billet is finally melted in the electroslag remelting process, so that the phenomenon that a consumable electrode at the lower end falls off at a welding position when two electrode billet sections are adopted for stitch welding is avoided, and the metallurgical quality is favorably ensured; in addition, the inclined plane welding can also increase the welding area, thereby improving the welding strength.

2. The utility model relates to a slender consumable electrode blank, two centering grooves are arranged on the outer peripheral surface of the large-diameter end of the electrode blank section, and the two centering grooves are respectively positioned at the top end and the bottom end of an inclined plane; before welding, the two inclined planes of the two electrode blank sections can be oppositely attached by means of the centering groove, so that the difficulty of enabling the two electrode blank sections to be coaxial during welding can be reduced, and the production efficiency is improved.

3. The utility model relates to a manufacturing mould of a slender consumable electrode blank, which adopts the form of combining a mould body and a forming mould base, and is convenient for maintaining and repairing the mould body in the production and manufacturing process of the slender consumable electrode blank; the die body and the forming die base can be replaced independently, the whole manufacturing die is prevented from being scrapped together, and the production and manufacturing cost of the slender consumable electrode blank can be effectively reduced.

Drawings

FIG. 1 is a schematic diagram of the relationship between the consumable electrode and the position of an electroslag ingot in the background art;

FIG. 2 is a perspective view of an electrode billet of an embodiment;

FIG. 3 is a perspective view of an elongated consumable electrode blank according to an embodiment;

FIG. 4 is a radial cross-sectional view of a mold for making an elongated consumable electrode blank according to an embodiment;

FIG. 5 is a perspective view of a base of a molding die according to an embodiment;

FIG. 6 is a radial cross-sectional view of an embodiment of the refractory article;

the device comprises an electroslag ingot 1, a metal molten pool 2, a consumable electrode tip 3, a liquid slag pool 4 and a consumable electrode 5; an electrode billet 6, a centering groove 7; the casting mold comprises a mold body 8, a forming mold base 9, a mold cavity 10, a forming part 11, a pouring hole 12, a centering column 13 and a refractory piece 14.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings in the embodiments of the present invention are combined below to clearly and completely describe the technical solutions in the embodiments of the present invention. It is to be understood that the embodiments described are only some of the embodiments of the present invention, and not all of them. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures. In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description and simplification of the description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. Furthermore, the terms "horizontal", "vertical" and the like do not imply that the components are required to be absolutely horizontal or pendant, but rather may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined. In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example (b):

referring to fig. 2 and 3, a slender consumable electrode blank (the consumable electrode blank is a blank for manufacturing a consumable electrode and becomes a finished consumable electrode product after subsequent polishing and other processes) includes two electrode blank sections 6, one end surface of each electrode blank section 6 is an inclined surface, the inclined angle of the inclined surface on each electrode blank section 6 is 40-50 degrees, and the two inclined surfaces on the two electrode blank sections 6 are parallel, opposite and welded to each other; in this embodiment, in order to reduce the difficulty of casting the inclined plane on the electrode billet 6, the inclined angle of the inclined plane on the electrode billet 6 is selected to be 45 degrees, and 45 degrees is an optimal inclined angle, so that the welding operation is facilitated, and the phenomenon of block falling at the welding position in the electroslag remelting process can be avoided.

The utility model relates to a slender type consumable electrode base, by two electrode base sections 6 along the axial stitch welding connection form, the degree of difficulty of pouring two shorter electrode base sections 6 is lower than direct pouring preparation slender type consumable electrode base, the success rate is high, can effectively improve the preparation efficiency of slender type consumable electrode base, reduce the cost of manufacture; the end of the electrode billet 6 for welding connection is designed into an inclined plane, because the angle of the melting end surface of the consumable electrode is generally not more than 30 degrees, the inclination angle of a metal molten pool is generally not more than 45 degrees, and the angle of the electrode billet 6 for welding the inclined plane is limited to 45 degrees, in the electroslag remelting process, when the consumable electrode is melted and approaches to a welding position, the top end of the inclined plane of the consumable electrode at the lower end is melted finally, so that the phenomenon that the consumable electrode at the lower end falls off at the welding position when two electrode billet sections are adopted for stitch welding is avoided, and the metallurgical quality is favorably ensured; in addition, the inclined plane welding can also increase the welding area, thereby improving the welding strength.

In the embodiment, the peripheral surface of the electrode billet 6 is designed to have a taper, and the end surface of the large-diameter end of the electrode billet 6 is an inclined surface, so that compared with the conventional method of directly casting the electrode billet into a slender consumable electrode billet, the whole taper and the shrinkage cavity are smaller, thereby being beneficial to the stability of an electroslag process and having small mass segregation; the large-diameter ends of the two electrode billet sections 6 are welded and connected, so that the welding area can be increased, the welding strength is improved, and the integral structural strength of the slender consumable electrode billet formed by welding can be improved.

In this embodiment, two centering grooves 7 are formed in the outer peripheral surface of the electrode billet 6, which is close to the inclined surface of the electrode billet 6, the centering grooves 7 extend to the inclined surface of the electrode billet 6 along the axial direction of the electrode billet 6, and the two centering grooves 7 are respectively located at the top end and the bottom end of the inclined surface; therefore, before welding, the two inclined surfaces of the two electrode billet sections 6 can be just attached to each other by the centering groove 7, so that the difficulty of coaxiality of the two electrode billet sections 6 during welding can be reduced, and the production efficiency is improved.

Please refer to fig. 4 and 5, the present invention further provides a mold for manufacturing the elongated consumable electrode blank, the mold for manufacturing the elongated consumable electrode blank includes a mold body 8 and a forming mold base 9, a cylindrical mold cavity 10 penetrating through two ends of the mold body 8 is provided in the mold body 8, the forming mold base 9 is provided at one end of the mold cavity 10, a cylindrical forming portion 11 is formed on the surface of the forming mold base 9 facing the mold body 8 along the axial direction of the mold cavity 10, the forming portion 11 extends into the mold cavity 10, and the end surface of the forming portion 11 is an inclined surface; the surface of the forming die base 9 far away from the die body 8 is provided with a pouring hole 12 penetrating through the forming part 11. During practical use, the die body 8 is vertically placed, and the forming die base 9 is arranged at the bottom end of the die cavity 10.

During casting, a sealing element is arranged at the upper end of a mold body 8 to seal the corresponding end of a mold cavity 10, a forming mold base 9 is installed at the bottom end of the mold body 8, a forming part 11 extends into the mold cavity 10, molten metal liquid for manufacturing a consumable electrode blank is injected into the mold cavity 10 from a pouring hole 12 in the forming mold base 9 from bottom to top, the outer peripheral surface of the electrode blank section 6 is formed by the mold cavity 10, the inclined surface at the end part of the forming part 11 forms the inclined surface on the electrode blank section 6, the mold is removed after the molten metal is cooled, and a lug formed on the inclined surface due to the redundant molten metal in the pouring hole 12 is cut off, so that the electrode blank section 6 can be obtained; the utility model designs the making mould of the slender consumable electrode blank into the form of combining the mould body 8 and the forming mould base 9, which is convenient for maintaining and repairing the mould body 8 in the production and making process of the slender consumable electrode blank; the die body 8 and the forming die base 9 can be replaced independently, the whole manufacturing die is prevented from being scrapped together, and the production and manufacturing cost of the slender consumable electrode blank can be effectively reduced.

In this embodiment, the mold cavity 10 in the mold body 8 is designed to have a taper to cast the taper of the electrode billet 6, the forming mold base 9 is located at the large-diameter end of the mold cavity 10, and the outer peripheral surface of the forming portion 11 has a taper and is matched with the taper of the mold cavity 10, so that the outer peripheral surface of the forming portion 11 is tightly attached to the wall of the mold cavity 10, which is not only beneficial to casting, but also convenient for the installation and connection of the forming mold base 9 and the mold body 8.

Referring to fig. 5, in the present embodiment, two centering pillars 13 are formed on the end surface of the forming portion 11 in a protruding manner along the axial direction of the mold cavity 10, the two centering pillars 13 are respectively located at the top end and the bottom end of the inclined end surface and are distributed in a centering manner, and the centering pillars 13 are located at the edge of the end surface of the forming portion 11 and are coplanar with the outer peripheral surface of the forming portion 11; thus, when the inclined plane at the end of the forming part 11 forms the inclined plane at the end of the electrode billet 6, the centering column 13 can form the centering groove 7 extending to the inclined plane on the outer peripheral surface of the electrode billet 6, and the centering groove 7 is formed by one-step casting without subsequent arrangement of the centering groove 7.

Referring to fig. 4 and fig. 6, in addition, a ring-column-shaped refractory piece 14 is fittingly arranged in the pouring hole 12, and one end of the refractory piece 14 facing the mold body 8 is inclined and flush with the end surface of the molding part 11; the molten metal can be prevented from directly scouring the pouring hole 12, and the service life of the forming die base 9 is prolonged;

to provide a close fit of the refractory 14 to the pouring orifice 12 and to avoid the refractory 14 falling into the mould cavity 10 during pouring; setting a pouring hole 12 with a taper, wherein the large-diameter end of the pouring hole 12 faces the mold body 8, the outer peripheral surface of the refractory 14 has a taper, the small-diameter end of the refractory 14 faces the mold body 8, the refractory 14 is made of refractory material, in this embodiment, high-alumina bricks are adopted, and the refractory 14 is installed in the pouring hole 12;

the bore of the refractory 14 has a 5% taper with the large diameter end of the bore of the refractory 14 facing the die body 8.

The utility model solves the technical problem that the long and thin consumable electrode blank formed by butt welding can drop at the welding position, designs the long and thin consumable electrode blank formed by welding two electrode blank sections 6 through inclined planes, provides a feasible solution for manufacturing the long and thin consumable electrode blank, and provides a reference solution for manufacturing other similar consumable electrode blanks; certain contribution is made to popularization of the fully-closed protective atmosphere electroslag furnace; the traditional double-support-arm exchange normal-pressure electroslag furnace can also be used for manufacturing the consumable electrode blank in such a way, and is very beneficial to reducing or avoiding the exchange of the consumable electrode blank, avoiding the generation of quality defects of an electroslag ingot slag channel and the like.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the technical solutions, and those skilled in the art should understand that those modifications or equivalent substitutions can be made to the technical solutions of the present invention without departing from the spirit and scope of the technical solutions, and all should be covered in the scope of the claims of the present invention.

Claims (10)

1. An elongated consumable electrode blank, characterized by: the electrode blank comprises two coaxial electrode blanks, one end face of each electrode blank is an inclined plane, the inclined plane on each electrode blank has an inclination angle of 40-50 degrees, and the two inclined planes on the two electrode blanks are parallel, opposite and connected in a welding mode.

2. An elongated consumable electrode blank according to claim 1, wherein: the inclination angle of the inclined plane on the electrode billet is 45 degrees.

3. An elongated consumable electrode blank according to claim 1, wherein: the peripheral surface of the electrode billet has a taper, and the inclined plane on the electrode billet is positioned at the large-diameter end of the electrode billet.

4. An elongated consumable electrode blank according to claim 1, wherein: two centering grooves are formed in the outer peripheral surface, close to the inclined surface on the electrode blank section, of the electrode blank section, extend to the inclined surface on the electrode blank section along the axial direction of the electrode blank section, and the two centering grooves are located at the top end and the bottom end of the inclined surface respectively.

5. A mould for manufacturing a slender consumable electrode blank is characterized in that: the forming die comprises a die body and a forming die base, wherein a columnar die cavity penetrating through two ends of the die body is formed in the die body, the forming die base is arranged at one end of the die cavity, a columnar forming part is formed on the surface, facing the die body, of the forming die base along the axial direction of the die cavity in a protruding mode, the forming part extends into the die cavity, and the end face of the forming part is an inclined plane; and a pouring hole penetrating through the forming part is formed on the surface of the forming die base, which is far away from the die body.

6. The die for making an elongated consumable electrode blank according to claim 5, wherein: the die cavity has a taper, the forming die base is positioned at the large-diameter end of the die cavity, and the peripheral surface of the forming part has a taper and is matched with the taper of the die cavity.

7. The die for making an elongated consumable electrode blank according to claim 5, wherein: the axial bulge along the die cavity on the terminal surface of shaping portion is formed with two centering posts, and two centering posts are located the top and the bottom of terminal surface respectively, and the centering post is located the terminal surface border of shaping portion and has the coplane with the outer peripheral face of shaping portion.

8. The die for making an elongated consumable electrode blank according to claim 5, wherein: the pouring hole is internally matched with a fire-resistant piece in an annular column shape, and one end of the fire-resistant piece facing the mould body is an inclined plane and is flush with the end face of the forming part.

9. The die for making an elongated consumable electrode blank according to claim 8, wherein: the pouring hole has a taper, the large-diameter end of the pouring hole faces the mold body, the outer peripheral surface of the refractory part has a taper, the small-diameter end of the refractory part faces the mold body, the refractory part is made of refractory materials, and the refractory part is installed in the pouring hole.

10. The die for making an elongated consumable electrode blank according to claim 8, wherein: the refractory part is made of high-alumina bricks.

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