CN112404376A - Mold for producing special alloy plate blank by vacuum induction smelting furnace and use method thereof - Google Patents
Mold for producing special alloy plate blank by vacuum induction smelting furnace and use method thereof Download PDFInfo
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- CN112404376A CN112404376A CN202011092351.1A CN202011092351A CN112404376A CN 112404376 A CN112404376 A CN 112404376A CN 202011092351 A CN202011092351 A CN 202011092351A CN 112404376 A CN112404376 A CN 112404376A
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- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D7/00—Casting ingots, e.g. from ferrous metals
- B22D7/06—Ingot moulds or their manufacture
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Abstract
The application discloses mould of vacuum induction melting furnace production special alloy slab, its characterized in that: the mould comprises a mould base, a flat inner cavity mould and a longitudinal casting pipe, wherein the flat inner cavity mould is arranged in the mould base, the longitudinal casting pipe extends downwards and is communicated with a transverse casting pipe arranged on the mould base, and the transverse casting pipe is communicated with the bottom of an inner cavity of the mould through a branch pipe. The invention provides a mould suitable for casting a slab in a vacuum induction melting furnace, which effectively improves the internal temperature field of the slab during casting by adopting the design that three bottom branch pipes simultaneously cast an inner cavity of the mould, greatly reduces the temperature difference between the edge part and the center part on the equal-height section of the slab, and thus can cast the slab with qualified quality.
Description
Technical Field
The application relates to a die for producing a special alloy plate blank by a vacuum induction smelting furnace and a using method thereof.
Background
At present, a plurality of manufacturers cast special alloy flat ingots in the smelting link of special plate production and then perform subsequent forging, cogging and rolling. In fact, the slab ingot does not meet the size requirement of direct rolling and still needs to be forged and cogging for realization, so that the method has difficulty in achieving the purposes of reducing the working procedures, energy consumption and cost. Aiming at partial special alloy products, if qualified special alloy slabs can be directly cast in the smelting link, the special alloy slabs can be directly rolled into special alloy finished plates without forging and cogging. Thereby achieving the purposes of reducing working procedures, energy consumption and cost.
Patent 208712810U discloses a pouring slab ingot device is smelted to alloy, including the funnel mount, the funnel brick, flat combination ingot mould, guide rail and driving motor, the bottom of funnel brick is provided with a funnel hole, the funnel hole is located rectangle pouring chamber directly over, the funnel brick passes through the funnel mount and installs in flat combination ingot mould top, flat combination ingot mould is including the bottom plate that is located the bottom, breakwater and the design mould of erectting on the bottom plate, the design mould passes through steel sheet fastening connection, install nut and bolt on the steel sheet, be provided with stop device on the guide rail both ends, driving motor is connected with one side of bottom plate, driving motor includes hydraulic telescoping rod, pneumatic cylinder and the heat-resisting stainless steel safety cover that is used for protecting hydraulic telescoping rod.
Patent 208712810U discloses an alloy smelting and casting slab ingot device, which can inhibit slab ingot cracking and make the alloy structure more uniform and pore-free, but the slab ingot does not conform to the size requirement of direct rolling, and can be realized only after continuous forging or rolling cogging, so the method still has the disadvantages of low efficiency and high cost, and is difficult to achieve the purposes of reducing working procedures and energy consumption and cost. Aiming at partial special alloy products, if qualified special alloy slabs can be directly cast in the smelting link, the special alloy slabs can be directly rolled into special alloy finished plates without forging and cogging. Thereby achieving the purposes of reducing working procedures, energy consumption and cost. Therefore, it is very important to design a tooling die which can directly cast special alloy slabs meeting the requirements in the smelting link.
Therefore, the invention designs the die suitable for producing the special alloy plate blank, and the plate blank meeting the rolling requirement can be directly cast in the vacuum induction smelting furnace, so that the forging and cogging links are reduced, the energy consumption is reduced, and the production efficiency is improved.
Disclosure of Invention
The invention aims to provide a die for producing a special alloy plate blank by using a vacuum induction melting furnace and a using method thereof, so as to overcome the defects in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a mould of vacuum induction smelting furnace production special alloy slab, includes the mould base, installs the flat inner chamber mould of inside cavity on the mould base and indulges the cast tube, indulge cast tube downwardly extending and set up horizontal cast tube on the mould base and be linked together, horizontal cast tube through the branch pipe with mould inner chamber bottom intercommunication.
Preferably, the tail end of the branch pipe is provided with an eyelet, and lifting lugs are arranged on two sides of the die.
Preferably, the length, width and height of the inner cavity of the grinding tool meet the following requirements: l3 (1.5-1.8) L2 (10-15) L1; wherein: l3 is the mold cavity height, L2 is the mold cavity width, and L1 is the mold cavity length.
Preferably, the radius ratio of the longitudinal casting pipe, the transverse casting pipe and the branch pipe is as follows: 1: 0.69-0.74: 0.58-0.6.
Preferably, the upper end of the longitudinal casting pipe is connected with a bell mouth, and the vertical height of the bell mouth is 500-800 mm higher than that of the upper end of the die.
Preferably, the upper end of the die is inwards recessed to form a refractory material groove, and an embedded refractory material riser is placed in the refractory material groove.
Preferably, the branch pipes include a first branch pipe, a second branch pipe and a third branch pipe, and the positional relationship among the eyelets at the ends of the first branch pipe, the second branch pipe and the third branch pipe satisfies the following conditions from left to right along the width direction of the mold cavity: l4 ═ L7 ═ 0.5L5 ═ 0.5L 6; l4 is the distance between the end hole of the first branch pipe and the left wall of the mold cavity, L5 is the distance between the end hole of the first branch pipe and the end hole of the second branch pipe, L6 is the distance between the end hole of the second branch pipe and the end hole of the third branch pipe, and L7 is the distance between the end hole of the third branch pipe and the right wall of the mold cavity.
In order to realize another purpose of the invention, the invention provides a use method of a mold for producing a special alloy plate blank by a vacuum induction smelting furnace, which comprises the following steps:
step 1: assembling; assembling a bottom branch pipe of the mold base and a transverse main pipe, then assembling a longitudinal cast pipe, a longitudinal cast pipe protective sleeve and a longitudinal cast pipe bell mouth, hoisting the mold to the mold base and fixing the mold in position;
step 2: casting; baking the assembled die in the step 1 at 400-500 ℃ for 2-4 hours; then controlling a casting ladle to enable the molten steel to enter from a longitudinal casting pipe horn and flow into the inner cavity of the mold through a transverse casting pipe and a bottom branch pipe, controlling the rising speed of the molten steel in the inner cavity of the mold until the molten steel fills the whole inner cavity of the mold, and stopping casting;
and step 3: demolding; and (4) after the mold poured in the step is cooled, demolding the mold.
Preferably, in the step 1, the longitudinal casting pipe protective sleeves are fastened by iron pins; and an embedded refractory riser is arranged at the upper end of the mold.
Compared with the prior art, the invention provides the mould suitable for the vacuum induction smelting furnace to cast the plate blank, the special alloy plate blank can be cast in the vacuum induction smelting furnace through the mould, the traditional cogging link is avoided, the rolling link can be directly entered, and compared with the traditional plate production mode needing cogging, the invention has great advantages in the aspects of reducing energy consumption, improving efficiency, reducing cost and the like. Simultaneously, the vacuum mould adopts the design that three bottom branch pipes simultaneously cast an inner cavity of the mould, effectively improves the internal temperature field of the slab during casting, and greatly reduces the temperature difference between the edge part and the center part on the equal-height section of the slab, thereby casting the slab with qualified quality.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments described in the present application, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a partial sectional view of a mold for producing a special alloy slab by a vacuum induction melting furnace according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a mold for producing a special alloy slab by using a vacuum induction melting furnace according to an embodiment of the invention;
fig. 3 is a schematic bottom structure diagram of a mold for producing a special alloy slab by using a vacuum induction melting furnace according to an embodiment of the invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described in detail below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
Referring to fig. 1, the mold 1 for producing the special alloy slab by using the vacuum induction melting furnace has a flat inner cavity 9 with openings at the upper and lower parts, wherein the size of the inner cavity 9 is similar to that of the required slab, the thickness of the inner cavity is L1, the width of the inner cavity is L2, and the height of the inner cavity is L3. 9 upper ends of mould inner chamber designs round refractory material recess 101 all around, places embedded refractory material rising head 2, and the lug is installed on 1 both sides of mould and is convenient for hoist and mount and accord with the next rolling mill processing requirement for the slab ingot casting that the casting came out, and in the aspect of 9 sizes of mould inner chamber, with height, width and thickness three design following proportional relation: l3 (1.5-1.8) L2 (10-15) L1
Referring to fig. 2, the mold of the present application adopts a bottom casting method, molten steel is cast into a longitudinal casting pipe 6 with a bell mouth 8 at the upper end from a tundish, the molten steel flows down along the longitudinal casting pipe 6 and reaches a bottom transverse casting pipe 7, the transverse casting pipe 7 is connected with one end of three horizontally placed bottom refractory branch pipes 8, the other end of each branch pipe 8 is led into the bottom of a mold cavity 9, and holes 801 are designed on the upper end surface of the tail end of each branch pipe 8. Therefore, after the molten steel reaches the transverse casting pipe 7, the molten steel is divided into three branch pipes 8, the molten steel flows horizontally along the bottom branch pipe 8, and finally is cast into different positions at the bottom of the inner cavity 9 of the mold through the upper holes 801 at the tail ends of the branch pipes 8, and the molten steel can be gradually cast into the inner cavity 9 of the mold from bottom to top along with the casting. The longitudinal casting pipe bell mouth 5 and the longitudinal casting pipe 6 are made of formed refractory materials and are connected in a step type splicing mode, the longitudinal casting pipe 6 can be spliced in a segmented mode according to the height condition, and cement is required to be smeared at the splicing position to ensure that molten steel does not leak from the joint. The outer layers of the horn mouth 5 and the longitudinal casting pipe 6 of the longitudinal casting pipe are sleeved with a longitudinal casting pipe protective sleeve 4 made of cast iron or carbon steel, and a gap between the protective sleeve 4 and the longitudinal casting pipe 6 is filled and tamped by adopting dry magnesia. The bottom horizontal casting pipe 7 and the branch flow pipe 8 are horizontally arranged in the groove of the mold base 3. In order to achieve better flow matching of molten steel in the longitudinal casting pipes 6, the transverse casting pipes 7 and the bottom branch pipes 8, the radius R1 of the longitudinal casting pipes 6, the radius R2 of the transverse casting pipes and the radius R3 of the bottom branch pipes 8 have the following proportional relationship:
R1：R2：R3＝1:(0.69～0.74)：(0.58～0.6)。
meanwhile, in order to ensure that the mould can be smoothly filled during casting, the upper end of the bell mouth 5 of the longitudinal casting pipe 7 is 500-800 mm higher than the upper end of the mould 1, and molten steel in the longitudinal casting pipe 7 is smoothly cast into the inner cavity of the mould through the transverse casting pipe and the bottom branch pipe by utilizing the liquid level difference principle, so that the filling is ensured to be finished.
As shown in fig. 3, L2 is the width of the mold cavity 9, L4 is the distance between the left branch and the left wall of the mold cavity 9, L5 is the distance between the left branch and the middle branch, L6 is the distance between the middle branch and the right branch, and L7 is the distance between the right branch and the right wall of the mold cavity. Satisfy L4-L7-0.5-L5-0.5-L6. t, the internal temperature field of the slab during and after casting is changed through the design of the distance, the temperature difference of the equal-height section of the slab is reduced, the surface quality of the slab is improved, and meanwhile, large shrinkage cavities in the slab, which are generated by the large temperature difference of the equal-height section, are avoided, so that the shrinkage cavities in the slab are miniaturized and dispersed. The small shrinkage cavity or the small porosity can be completely welded in the rolling process of the later slab through reasonable rolling temperature and rolling deformation.
Meanwhile, the casting system is integrally baked after being assembled, the temperature is kept at 450-550 ℃ for 2-3 hours, the baked die fixture is integrally hoisted to the casting chamber after baking time is up and casting is required to be performed, the door of the casting chamber is required to be closed immediately after the die fixture is positioned and placed, the casting chamber is vacuumized, and casting operation can be performed after the vacuum degree of the casting chamber meets the process requirement. In this way, the time from the stop of the baking to the start of the casting of the die is reduced, the temperature drop of the die is reduced, and the fluidity of the molten steel in the casting channel during the casting is ensured.
The application provides a use method of a mould for producing a special alloy plate blank by using a vacuum induction smelting furnace, which comprises the following steps:
step 1: assembling; firstly, assembling a bottom branch pipe on a mold base, and then assembling a longitudinal casting pipe, a longitudinal casting pipe protective sleeve and a longitudinal casting pipe bell mouth in sequence, wherein each section of protective sleeve needs to be fastened by an iron pin; then hoisting the mould to a mould base and fixing the position; and finally, placing an embedded refractory riser at the upper end of the mold.
Step 2: casting; and (4) after the die is assembled and baked for 2-4 hours at 400-500 ℃, the casting process can be carried out. And controlling a casting ladle to enable molten steel to flow out of the furnace mouth and be cast into a bell mouth of the longitudinal casting pipe, enabling the molten steel to flow downstream the longitudinal casting pipe, sequentially pass through the transverse casting pipe and the bottom branch pipe, finally casting into the mold, controlling the rising speed of the molten steel surface in the mold until the molten steel fully casts the whole mold cavity, stopping casting, and solidifying and cooling.
And step 3: demolding; after the inner plate blank of the mold is cooled, the mold can be hoisted to a demolding area for demolding, the demolding sequence is opposite to the mold assembling sequence, the mold is hoisted firstly, the plate blank is removed, and the joint can be cut off by a cutting tool; then loosening the iron pin for fastening the longitudinal casting pipe protective sleeve and separating the protective sleeve; and finally, breaking the coated refractory cast pipe, and taking out the cold steel of the casting channel.
Example 1:
in this example, the casting system used should meet and comply with the following characteristics: namely, a longitudinal casting pipe passes through a bottom transverse casting pipe and is connected with three or a plurality of branch pipes, and the branch pipes can guide molten steel into the same slab mold. The height L3, the width L2 and the thickness L1 of the size of the inner cavity of the die need to have the following proportional relationship: l3 (1.5-1.8) L2 (10-15) L1; the casting pipe radius R1, the transverse casting pipe radius R2 and the bottom branch pipe radius R3 are in proportion as follows: r1: r2: r3 is 1 (0.69-0.74): (0.58-0.6); the distance between the bottom branch pipe at the edge position and the bottom branch pipe at the central position is 2 times that between the bottom branch pipe at the edge position and the inner wall of the mold; after the die is assembled, the upper end of the bell mouth of the longitudinal cast tube is 500-800 mm higher than the upper end of the die; and (4) integrally baking the assembled die, and keeping the temperature of the die at 450-550 ℃ for 2-3 h.
In the example operation, a 4.5 ton vacuum induction melting furnace was used, the cast steel grade was 4J36 precision alloy, the casting temperature was 1530 ℃, the speed of the rise of the liquid steel level in the mold was 5.2mm/s.
Example 2:
in this example, the casting system used should meet and comply with the following characteristics: namely, a longitudinal casting pipe passes through a bottom transverse casting pipe and is connected with three or a plurality of branch pipes, and the branch pipes can guide molten steel into the same slab mold. The height L3, the width L2 and the thickness L1 of the size of the inner cavity of the die need to have the following proportional relationship: l3 (1.5-1.8) L2 (10-15) L1; the casting pipe radius R1, the transverse casting pipe radius R2 and the bottom branch pipe radius R3 are in proportion as follows: r1: r2: r3 is 1 (0.69-0.74): (0.58-0.6); the distance between the bottom branch pipe at the edge position and the bottom branch pipe at the central position is 2 times that between the bottom branch pipe at the edge position and the inner wall of the mold; after the die is assembled, the upper end of the bell mouth of the longitudinal cast tube is 500-800 mm higher than the upper end of the die; and (4) integrally baking the assembled die, and keeping the temperature of the die at 450-550 ℃ for 2-3 h.
In the example operation, a 4.5 ton vacuum induction melting furnace is used, the casting steel grade is 4J36 precision alloy, the casting temperature is 1535 ℃, the rising speed of the steel liquid level in the die is 5.1mm/s, the surface quality of the slab produced by using the slab casting system and relevant casting parameters is good, and the internal quality also meets the process requirements.
Example 3:
in this example, the casting system used should meet and comply with the following characteristics: namely, a longitudinal casting pipe passes through a bottom transverse casting pipe and is connected with three or a plurality of branch pipes, and the branch pipes can guide molten steel into the same slab mold. The height L3, the width L2 and the thickness L1 of the size of the inner cavity of the die need to have the following proportional relationship: l3 (1.5-1.8) L2 (10-15) L1; the casting pipe radius R1, the transverse casting pipe radius R2 and the bottom branch pipe radius R3 are in proportion as follows: r1: r2: r3 is 1 (0.69-0.74): (0.58-0.6); the distance between the bottom branch pipe at the edge position and the bottom branch pipe at the central position is 2 times that between the bottom branch pipe at the edge position and the inner wall of the mold; after the die is assembled, the upper end of the bell mouth of the longitudinal cast tube is 500-800 mm higher than the upper end of the die; and (4) integrally baking the assembled die, and keeping the temperature of the die at 450-550 ℃ for 2-3 h.
In the example operation, a 4.5-ton vacuum induction melting furnace is used, the casting steel grade is 4J36 precision alloy, the casting temperature is 1540 ℃, the rising speed of the liquid steel level in the die is 5.0mm/s, the surface quality of the slab produced by using the slab casting system and relevant casting parameters is good, and the internal quality also meets the process requirements.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing is merely a detailed description of the present application, and it should be noted that modifications and embellishments could be made by those skilled in the art without departing from the principle of the present application, and these should also be considered as the protection scope of the present application.
Claims (9)
1. The utility model provides a mould of special alloy slab of vacuum induction melting furnace production which characterized in that: the mould comprises a mould base, a flat inner cavity mould and a longitudinal casting pipe, wherein the flat inner cavity mould is arranged in the mould base, the longitudinal casting pipe extends downwards and is communicated with a transverse casting pipe arranged on the mould base, and the transverse casting pipe is communicated with the bottom of an inner cavity of the mould through a branch pipe.
2. The mold for producing the special alloy plate blank by the vacuum induction melting furnace according to claim 1, is characterized in that: the tail end of the branch pipe is provided with a hole, and lifting lugs are arranged on two sides of the die.
3. The mold for producing the special alloy plate blank by the vacuum induction melting furnace according to claim 1, is characterized in that: the length, width and height of the inner cavity of the grinding tool meet the following requirements: l3 (1.5-1.8) L2 (10-15) L1; wherein: l3 is the mold cavity height, L2 is the mold cavity width, and L1 is the mold cavity length.
4. The mold for producing the special alloy plate blank by the vacuum induction melting furnace according to claim 1, is characterized in that: the radius ratio of the longitudinal casting pipe, the transverse casting pipe and the branch pipe is as follows: 1: 0.69-0.74: 0.58-0.6.
5. The mold for producing the special alloy plate blank by the vacuum induction melting furnace according to claim 1, is characterized in that: the upper end of the longitudinal casting pipe is connected with a horn mouth, and the vertical height of the horn mouth is higher than that of the upper end of the die by 500-800 mm.
6. The mold for producing the special alloy plate blank by the vacuum induction melting furnace according to claim 1, is characterized in that: the upper end of the die is inwards sunken to form a refractory material groove, and an embedded refractory material riser is placed in the refractory material groove.
7. The mold for producing the special alloy plate blank by the vacuum induction melting furnace according to claim 1, is characterized in that: the branch pipes comprise a first branch pipe, a second branch pipe and a third branch pipe, and the position relation among the eyelets at the tail ends of the first branch pipe, the second branch pipe and the third branch pipe satisfies the following conditions from left to right along the width direction of the inner cavity of the mold: l4 ═ L7 ═ 0.5L5 ═ 0.5L 6; l4 is the distance between the end hole of the first branch pipe and the left wall of the mold cavity, L5 is the distance between the end hole of the first branch pipe and the end hole of the second branch pipe, L6 is the distance between the end hole of the second branch pipe and the end hole of the third branch pipe, and L7 is the distance between the end hole of the third branch pipe and the right wall of the mold cavity.
8. Use method of a mould for producing special alloy slabs by using a vacuum induction smelting furnace according to any one of claims 1 to 7, characterized by comprising the following steps: the method comprises the following steps:
step 1: assembling; assembling a bottom branch pipe of the mold base and a transverse main pipe, then assembling a longitudinal cast pipe, a longitudinal cast pipe protective sleeve and a longitudinal cast pipe bell mouth, hoisting the mold to the mold base and fixing the mold in position;
step 2: casting; baking the assembled die in the step 1 at 400-500 ℃ for 2-4 hours; then controlling a casting ladle to enable the molten steel to enter from a longitudinal casting pipe horn and flow into the inner cavity of the mold through a transverse casting pipe and a bottom branch pipe, controlling the rising speed of the molten steel in the inner cavity of the mold until the molten steel fills the whole inner cavity of the mold, and stopping casting;
and step 3: demolding; and (4) after the mold poured in the step is cooled, demolding the mold.
9. The use method of the mold for producing the special alloy plate blank by the vacuum induction melting furnace according to the claim 8 is characterized in that: in the step 1, the longitudinal casting pipe protective sleeves are fastened by iron pins; and an embedded refractory riser is arranged at the upper end of the mold.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011092351.1A CN112404376B (en) | 2020-10-13 | 2020-10-13 | Mold for producing special alloy plate blank by vacuum induction smelting furnace and use method thereof |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202011092351.1A CN112404376B (en) | 2020-10-13 | 2020-10-13 | Mold for producing special alloy plate blank by vacuum induction smelting furnace and use method thereof |
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| CN112404376A true CN112404376A (en) | 2021-02-26 |
| CN112404376B CN112404376B (en) | 2022-05-27 |
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| US4278124A (en) * | 1978-04-11 | 1981-07-14 | Kawasaki Steel Corporation | Method of producing hollow steel ingot and apparatus therefor |
| CN202155487U (en) * | 2011-06-20 | 2012-03-07 | 郭秀梅 | Liquid steel casting equipment |
| WO2012174991A1 (en) * | 2011-06-20 | 2012-12-27 | Zhu Shucheng | Pouring device for liquid state molten steel |
| CN102886501A (en) * | 2012-10-09 | 2013-01-23 | 中国科学院金属研究所 | Tooling for efficiently manufacturing wide thick plate blank for wide thick plate rolling machine and manufacture method thereof |
| CN103008577A (en) * | 2012-12-07 | 2013-04-03 | 中国科学院金属研究所 | Preparation method and mold for microdefect high-utilization rate high-quality static ingot |
| CN203184610U (en) * | 2013-01-17 | 2013-09-11 | 中国科学院金属研究所 | Steel ingot mold for large-scale and extremely thick slab |
| CN210172516U (en) * | 2019-04-28 | 2020-03-24 | 江苏省沙钢钢铁研究院有限公司 | Tool and die for producing square vacuum ingot |
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2020
- 2020-10-13 CN CN202011092351.1A patent/CN112404376B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS4941223A (en) * | 1972-08-29 | 1974-04-18 | ||
| JPS5120414B2 (en) * | 1972-12-29 | 1976-06-24 | ||
| US4278124A (en) * | 1978-04-11 | 1981-07-14 | Kawasaki Steel Corporation | Method of producing hollow steel ingot and apparatus therefor |
| CN202155487U (en) * | 2011-06-20 | 2012-03-07 | 郭秀梅 | Liquid steel casting equipment |
| WO2012174991A1 (en) * | 2011-06-20 | 2012-12-27 | Zhu Shucheng | Pouring device for liquid state molten steel |
| CN102886501A (en) * | 2012-10-09 | 2013-01-23 | 中国科学院金属研究所 | Tooling for efficiently manufacturing wide thick plate blank for wide thick plate rolling machine and manufacture method thereof |
| CN103008577A (en) * | 2012-12-07 | 2013-04-03 | 中国科学院金属研究所 | Preparation method and mold for microdefect high-utilization rate high-quality static ingot |
| CN203184610U (en) * | 2013-01-17 | 2013-09-11 | 中国科学院金属研究所 | Steel ingot mold for large-scale and extremely thick slab |
| CN210172516U (en) * | 2019-04-28 | 2020-03-24 | 江苏省沙钢钢铁研究院有限公司 | Tool and die for producing square vacuum ingot |
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|---|---|
| CN112404376B (en) | 2022-05-27 |
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