CN215237612U - Superimposed iron casting die of iron casting machine - Google Patents
Superimposed iron casting die of iron casting machine Download PDFInfo
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- CN215237612U CN215237612U CN202023075492.0U CN202023075492U CN215237612U CN 215237612 U CN215237612 U CN 215237612U CN 202023075492 U CN202023075492 U CN 202023075492U CN 215237612 U CN215237612 U CN 215237612U
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Abstract
A superimposed cast iron mould of a pig machine comprises a cast carbon steel matrix, wherein a heat-resistant stainless steel working layer is arranged in the inner cavity of the cast carbon steel matrix; the heat-resistant stainless steel working layer is arranged on the surface of the inner cavity of the cast carbon steel base body, and the outline of the outer surface of the heat-resistant stainless steel working layer is consistent with the outline of the surface of the inner cavity of the cast carbon steel base body; the heat-resistant stainless steel working layer is a shell which is superposed on the surface of the inner cavity, corresponding through holes are arranged on the cast carbon steel base body and the heat-resistant stainless steel working layer, the cast carbon steel base body and the heat-resistant stainless steel working layer are connected through plug welding at the through holes, a plug welding seam I is formed on the heat-resistant stainless steel working layer of a plug welding seam II formed on the cast carbon steel base body, and the periphery of the upper opening of the heat-resistant stainless steel working layer is welded with the cast carbon steel base body to form a connecting welding seam.
Description
Technical Field
The utility model relates to a wearing part for a matching pig casting machine of an iron-making blast furnace, in particular to a superposed cast iron die of a pig casting machine.
Background
In iron and steel enterprises producing cast iron, an iron casting machine is a main device for producing iron blocks, and molten iron smelted by a blast furnace is changed into the iron blocks through the iron casting machine; in the iron and steel united enterprises, the pig machine is an auxiliary device of an iron-making blast furnace, molten iron is smelted by the blast furnace, and is sent to a steel plant to be smelted into molten steel, and finally, the molten iron is continuously cast and rolled into various steel products. Blast furnace ironmaking is a continuous process, and the blast furnace cannot be easily stopped, so that the cost is high when the blast furnace ironmaking is started once. When the steel making or the subsequent steel rolling process has faults, the molten iron produced by the iron making blast furnace is cast into iron blocks with certain shapes by an iron casting machine and stored, so that the blast furnace is not stopped. The cast iron mold accounts for about one third of the weight of the whole casting machine and is a key wearing part of the casting machine. The cast iron mold is fixed on the transmission chain belt, high-temperature molten iron with the temperature of about 1350 ℃ flows into the cast iron mold of the pig machine through the molten iron runner, the molten iron in the cast iron mold is cooled and cast into iron blocks through the spray water cooling area along with the movement of the chain belt, the temperature is about 500 ℃ when the iron blocks are separated from the cast iron mold, and the temperature is reduced to about 200 ℃ when the cast iron mold returns to the casting point again. Therefore, the cast iron die is in a rapid cooling and rapid heating state which changes frequently for a long time under the working condition, the working condition is very bad, thermal fatigue cracks or fractures are easy to occur, the machine is frequently stopped and replaced, and the comprehensive production capacity of the pig machine is influenced. The structural design of the cast iron mould is optimized to different degrees in domestic same industries, the materials are selected from gray cast iron, nodular cast iron, heat-resistant cast iron, low-carbon cast steel and the like, and the refractory materials are compounded in the inner cavity of the cast iron mould, although the refractory materials have certain effects, the refractory materials are easy to be eroded by molten iron, and the effect is not obvious. If the nickel-chromium austenite anti-oxidation steel is selected, the cost is high, and the user cannot accept the steel, so that the development of the cast iron mold with low cost, long service life and durability is urgent.
SUMMERY OF THE UTILITY MODEL
Aiming at the technical problem that the thermal fatigue crack or fracture easily occurs in the using process of the cast iron die, the utility model aims to provide a superimposed cast iron die of an iron casting machine.
The purpose of the utility model is realized with the following mode:
a superimposed cast iron mould of a pig machine comprises a cast carbon steel matrix, wherein a heat-resistant stainless steel working layer is arranged in the inner cavity of the cast carbon steel matrix; the heat-resistant stainless steel working layer is arranged on the surface of the inner cavity of the cast carbon steel base body, and the outline of the outer surface of the heat-resistant stainless steel working layer is consistent with the outline of the surface of the inner cavity of the cast carbon steel base body; the heat-resistant stainless steel working layer is a shell body superposed on the surface of the inner cavity, and the cast carbon steel base body is connected with the heat-resistant stainless steel working layer through welding.
The casting carbon steel base body and the heat-resistant stainless steel working layer are provided with corresponding through holes, the casting carbon steel base body and the heat-resistant stainless steel working layer are connected through plug welding at the through holes, a plug welding seam II is formed on the casting carbon steel base body, and a plug welding seam I is formed on the heat-resistant stainless steel working layer.
The periphery of the upper opening of the heat-resistant stainless steel working layer is welded and connected with the cast carbon steel matrix to form a connecting welding seam.
Further, the thickness of the heat-resistant stainless steel working layer is one third of the thickness of the cast carbon steel matrix.
Preferably, the heat-resistant stainless steel working layer is made of chromium-nickel austenite anti-oxidation steel.
Preferably, the welding rod used for the plug welding I is A102, the welding rod used for the plug welding II is J422, and the welding rod used for the welding of the upper opening periphery of the heat-resistant stainless steel working layer and the cast carbon steel matrix is A102.
Compared with the prior art, the utility model discloses a to the cast iron mould overall structure design innovation, the material of the working layer of contact molten iron has been changed, the working layer of cavity contact molten iron of cast iron mould has become heat-resisting stainless steel working layer, thermal fatigue life is showing and is improving, it obviously reduces to change the cast iron mould number of times, life has improved more than 3 times, reduce the pig machine and shut down maintenance time, the comprehensive production capacity of pig machine is showing and is improving, use producer's equipment running cost greatly reduced, simultaneously because the lower casting carbon steel of the casting carbon steel base member of cast iron mould still adopts the cost, so the cost of whole cast iron mould is also accepted by the user more easily, economic benefits is showing.
Drawings
Fig. 1 is a schematic sectional view of the front view of the present invention.
Fig. 2 is a schematic top view of the present invention.
Fig. 3 is a left side view schematic sectional structure of the present invention.
Wherein, 1-casting a carbon steel matrix; 2-lumen surface; 3-heat-resistant stainless steel working layer; 4-welding seams; 5-plug weld I; 6-plug weld II 6.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and specific embodiments.
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," and "fixed" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally formed; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.
Referring to fig. 1-3, a superimposed iron casting mold of an iron casting machine comprises a casting carbon steel substrate 1, wherein a heat-resistant stainless steel working layer 3 is arranged in the inner cavity of the casting carbon steel substrate 1, the heat-resistant stainless steel working layer 3 can bear molten iron erosion, the heat conductivity, the thermal fatigue strength, the high-temperature oxidation resistance and the high-temperature mechanical property of the heat-resistant stainless steel working layer 3 are superior to those of the casting carbon steel substrate 1, and the economic cost of the casting carbon steel substrate 1 is lower than that of the heat-resistant stainless steel working layer 3.
Further, a heat-resistant stainless steel working layer 3 is provided on the inner cavity surface 2 of the cast carbon steel base body 1, and the outer surface profile of the heat-resistant stainless steel working layer 3 conforms to the profile of the inner cavity surface 2 of the cast carbon steel base body 1.
Preferably, the heat resistant stainless steel working layer 3 is a shell superimposed on the inner cavity surface 2.
Furthermore, corresponding through holes are arranged on the casting carbon steel base body 1 and the heat-resistant stainless steel working layer 3, 3 through holes are uniformly arranged on the transverse central line of the cavity of the cast iron mold, the casting carbon steel base body 1 and the heat-resistant stainless steel working layer 3 are connected through plug welding at the through holes, a plug welding seam II 6 is formed on the casting carbon steel base body 1, a plug welding seam I5 is formed on the heat-resistant stainless steel working layer 3, and the periphery of the upper opening of the heat-resistant stainless steel working layer 3 is connected with the casting carbon steel base body 1 in a welding mode to form a connecting welding seam 4.
Specifically, the thickness of the heat-resistant stainless steel working layer 3 is one third of the thickness of the cast carbon steel base body 1.
Preferably, the cast carbon steel matrix 1 is a general engineering cast carbon steel, and the cast carbon steel is preferably ZG230-450 carbon steel.
Preferably, the heat-resistant stainless steel working layer 3 is made of chromium-nickel austenite oxidation-resistant steel, preferably 06Cr19Ni10 stainless steel.
Preferably, the plug weld I5 is made of a material with the performances of high-temperature oxidation resistance, thermal fatigue resistance and the like equivalent to those of the heat-resistant stainless steel working layer 3, preferably A102; the plug weld II 6 at the cast carbon steel substrate 1 is made of a material with the strength performance equivalent to that of the cast carbon steel substrate 1, preferably J422, and the connecting weld 4 is made of a material with the high-temperature oxidation resistance, thermal fatigue resistance and the like equivalent to that of the heat-resistant stainless steel working layer 3, preferably A102.
The working condition that the cast iron mold repeatedly receives high-temperature molten iron at about 1350 ℃ when in work, gray cast iron, nodular cast iron, heat-resistant cast iron and low-carbon cast steel are difficult to bear long service, and the composite refractory material of the inner cavity is not resistant to molten iron corrosion; the utility model discloses a to the design innovation of cast iron mould overall structure, change the material of cast iron mould inner chamber contact molten iron, prolong the life of cast iron mould, reduce the pig machine and shut down maintenance duration to improve the comprehensive productivity of pig machine.
Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.
Claims (7)
1. The utility model provides a pig machine stack formula iron casting mould which characterized in that: comprises a cast carbon steel substrate (1), wherein a heat-resistant stainless steel working layer (3) is arranged in the inner cavity of the cast carbon steel substrate (1); the heat-resistant stainless steel working layer (3) is arranged on the inner cavity surface (2) of the cast carbon steel base body (1), and the outline of the outer surface of the heat-resistant stainless steel working layer (3) is consistent with the outline of the inner cavity surface (2) of the cast carbon steel base body (1); the heat-resistant stainless steel working layer (3) is a shell which is superposed on the surface (2) of the inner cavity, and the cast carbon steel substrate (1) is connected with the heat-resistant stainless steel working layer (3) by welding.
2. The superimposed iron casting mold of an iron casting machine according to claim 1, wherein: the casting carbon steel base body (1) and the heat-resisting stainless steel working layer (3) are provided with corresponding through holes, the casting carbon steel base body (1) and the heat-resisting stainless steel working layer (3) are connected through plug welding at the through holes, a plug welding seam II (6) is formed on the casting carbon steel base body (1), and a plug welding seam I (5) is formed on the heat-resisting stainless steel working layer (3).
3. The superimposed iron casting mold of an iron casting machine according to claim 1, wherein: the periphery of the upper opening of the heat-resistant stainless steel working layer (3) is welded with the cast carbon steel matrix (1) to form a connecting welding seam (4).
4. The superimposed iron casting mold of an iron casting machine according to claim 1, wherein: the thickness of the heat-resistant stainless steel working layer (3) is one third of that of the cast carbon steel matrix (1).
5. The superimposed iron casting mold of an iron casting machine according to claim 1, wherein: the heat-resistant stainless steel working layer (3) is made of chromium-nickel austenite anti-oxidation steel.
6. The superimposed iron casting mold of an iron casting machine according to claim 2, characterized in that: the welding rod used by the welding seam (4) and the plug welding seam I (5) is A102.
7. The superimposed iron casting mold of an iron casting machine according to claim 2, characterized in that: and the welding rod used by the plug welding seam II (6) is J422.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023075492.0U CN215237612U (en) | 2020-12-18 | 2020-12-18 | Superimposed iron casting die of iron casting machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202023075492.0U CN215237612U (en) | 2020-12-18 | 2020-12-18 | Superimposed iron casting die of iron casting machine |
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| Publication Number | Publication Date |
|---|---|
| CN215237612U true CN215237612U (en) | 2021-12-21 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202023075492.0U Active CN215237612U (en) | 2020-12-18 | 2020-12-18 | Superimposed iron casting die of iron casting machine |
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| Country | Link |
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| CN (1) | CN215237612U (en) |
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2020
- 2020-12-18 CN CN202023075492.0U patent/CN215237612U/en active Active
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