CN215810161U - Nested combined crucible for induction smelting - Google Patents
Nested combined crucible for induction smelting Download PDFInfo
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- CN215810161U CN215810161U CN202121353338.7U CN202121353338U CN215810161U CN 215810161 U CN215810161 U CN 215810161U CN 202121353338 U CN202121353338 U CN 202121353338U CN 215810161 U CN215810161 U CN 215810161U
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Abstract
The utility model relates to a nested combined crucible for induction melting, which comprises an outer lining crucible 1, wherein the outer lining crucible 1 is placed in a crucible basket, a gap between the outer lining crucible 1 and the crucible basket is filled with refractory materials to fix the position of the outer lining crucible 1, a substrate groove 2 is placed at the bottom of an inner cavity of the outer lining crucible 1, a lining crucible 3 is placed above the substrate groove 2, and a single crystal high-temperature alloy ingot to be melted is placed in the lining crucible 3 for refining. The combined crucible can realize the quick replacement of the lining crucible 3 without breaking vacuum, and achieves the purpose that a single lining crucible 3 is used for single-furnace smelting and pouring, and in addition, the purpose of continuously obtaining single crystal high-temperature alloy castings with high purity, multiple varieties and mass production in the same vacuum induction smelting equipment can be achieved by selecting the combination mode of the lining crucibles 3 and the substrate grooves 2 with multiple sizes.
Description
Technical Field
The utility model relates to a nested combined crucible for induction melting, belonging to the technical field of manufacturing of single crystal high-temperature alloy castings.
Background
The single crystal high temperature alloy is a key material for turbine blades and other parts with extremely high temperature bearing and bearing requirements in advanced gas turbine engines. In recent years, with the explosive growth of the types and the number of aero-engines, the development mode of high-purity, multi-variety and mass production of single crystal superalloy castings becomes the future industrialized development trend. Generally, the engineering development of the single crystal high temperature alloy casting is carried out by remelting the single crystal high temperature alloy by a Bridgman directional solidification method through vacuum induction melting equipment, injecting the remelted single crystal high temperature alloy into a ceramic shell and casting.
The existing vacuum induction smelting method is that a crucible basket is fixed in an electromagnetic induction coil, a crucible with a specific size is embedded in the crucible basket, a refractory material is filled in a gap between the crucible and the crucible basket, a single crystal high-temperature alloy ingot with a specific mark is fed into the crucible, the alloy ingot is subjected to electromagnetic induction heating remelting refining and then is injected into a ceramic shell, and a single crystal high-temperature alloy casting is obtained through a directional solidification mode. The disadvantages of the existing vacuum induction melting method are that: firstly, one crucible is used for as many as 7 heats, the probability of impurities on the surface of the crucible diffusing into the alloy liquid is increased, and the purity of the single crystal high-temperature alloy is influenced; secondly, after the size of the crucible is fixed, a single variety of single crystal castings is obtained; and the crucible replacement process has long downtime waiting time, needs vacuum breaking, has low production efficiency and is not suitable for batch production.
Disclosure of Invention
The utility model provides a nested combined crucible for induction melting aiming at the defects in the prior art, and aims to overcome the defects of the existing vacuum induction melting method and meet the future industrialized development trend of single crystal high-temperature alloy castings.
The purpose of the utility model is realized by the following technical scheme:
the nested combined crucible for induction melting comprises an outer lining crucible 1, wherein the outer lining crucible 1 is placed in a crucible basket, a refractory material is filled in a gap between the outer lining crucible 1 and the crucible basket to fix the position of the outer lining crucible 1, a substrate groove 2 is placed at the bottom of an inner cavity of the outer lining crucible 1, a lining crucible 3 is placed above the substrate groove 2, and a single crystal high-temperature alloy ingot to be melted is placed in the lining crucible 3 for refining.
Further, the outer lining crucible 1 and the inner lining crucible 3 are both aluminum crucibles manufactured by the same process, and the high-temperature sintering temperature after isostatic pressing is not lower than 1650 ℃.
Further, the substrate groove 2 is made of graphite.
Further, the thickness value of the side wall of the substrate groove 2 is not less than 2 times of the thickness value of the side wall of the lining crucible 3.
Further, the clearance between the outer side wall surface of the substrate groove 2 and the inner side wall surface of the outer lining crucible 1 is less than 3 mm.
Further, the gap between the outer side wall surface of the lining crucible 3 and the inner side wall surface of the outer lining crucible 1 is 5-10 mm.
Further, the height of the top end face of the lining crucible 3 is higher than that of the top end face of the outer lining crucible 1, and the height difference of the two end faces is 8-15 mm.
Above-mentioned technical scheme can realize not breaking quick replacement inside lining crucible 3 under the vacuum, reaches 3 single heats of single inside lining crucible and smelts the pouring and use, in addition, can reach the purpose that obtains high purity, many varieties, the single crystal superalloy foundry goods of mass production in same vacuum induction melting equipment in succession through the compound mode of selecting multiple size inside lining crucible 3 and substrate groove 2.
The technical scheme of the utility model has the advantages that:
firstly, the utility model can realize the quick replacement of the lining crucible [3] under the condition of no vacuum breaking, and achieves the purpose of single-furnace smelting and pouring of a single lining crucible [3 ].
Secondly, the substrate groove is made of graphite which has a heat storage effect, so that the crucible can be slowly cooled after the high-temperature alloy liquid is smelted and poured in each furnace, the thermal shock degree of the crucible is reduced, and the service life of the crucible is prolonged.
Thirdly, the utility model can achieve the purpose of continuously obtaining single crystal high temperature alloy castings with high purity, various varieties and mass production in the same vacuum induction melting equipment by selecting the combination mode of lining crucibles [3] and lining grooves [2] with various sizes.
Drawings
FIG. 1 is a schematic structural view of a nested combination crucible for induction melting according to the present invention
Detailed Description
The utility model will be further described in detail with reference to the following figures and examples:
referring to fig. 1, the nested combined crucible for induction melting comprises an outer lining crucible 1, the outer lining crucible 1 is placed in a crucible basket, then a substrate groove 2 is slowly fed into the outer lining crucible 1 firstly, the outer bottom surface of the substrate groove 2 is ensured to be stably contacted with the inner bottom surface of the outer lining crucible 1, then an inner lining crucible 3 is slowly fed into the outer lining crucible 1, the outer bottom surface of the inner lining crucible 3 is ensured to be stably contacted with the outer top surface of the substrate groove 2, finally a single-crystal high-temperature alloy ingot is fed into the inner lining crucible 3, the alloy ingot is remelted and refined into alloy liquid through electromagnetic induction, the inner lining crucible 3 is continuously and gently poured into a ceramic shell, and a single-crystal high-temperature alloy casting is obtained after a directional solidification process.
In this embodiment, the outer crucible 1 and the inner crucible 3 are both aluminum crucibles manufactured by the same process, and the high-temperature sintering temperature after isostatic pressing is not lower than 1650 ℃.
In this embodiment, the substrate groove 2 is made of graphite.
In this embodiment, the thickness of the sidewall of the substrate bath 2 is not less than 2 times the thickness of the sidewall of the lining crucible 3.
In this embodiment, the gap between the outer wall surface of the substrate tank 2 and the inner wall surface of the outer crucible 1 is less than 3 mm.
In this embodiment, the gap between the outer wall surface of the lining crucible 3 and the inner wall surface of the outer lining crucible 1 is 5 to 10 mm.
In this embodiment, the height of the top end surface of the inner crucible 3 should be higher than that of the top end surface of the outer crucible 1, and the height difference between the two end surfaces is 8-15 mm.
Under the condition that the sizes of the substrate tank 2 and the lining crucible 3 meet the requirements, the sizes of the substrate tank 2 and the lining crucible 3 can be adjusted according to different alloy grades and material weights.
Experiments prove that the nested combined crucible can realize the quick replacement of the lining crucible 3 without breaking vacuum, so that the single lining crucible 3 can be used for single-furnace smelting and pouring, and in addition, the purpose of continuously obtaining single-crystal high-temperature alloy castings with high purity, multiple varieties and mass production in the same vacuum induction smelting equipment is achieved by selecting the combination mode of the lining crucibles 3 and the substrate grooves 2 with multiple sizes.
Claims (7)
1. The utility model provides an induction melting is with nested formula combination crucible which characterized in that: the combined crucible comprises an outer lining crucible (1), wherein the outer lining crucible (1) is placed in a crucible basket, a gap between the outer lining crucible (1) and the crucible basket is filled with refractory materials to fix the position of the outer lining crucible (1), a substrate groove (2) is placed at the bottom of an inner cavity of the outer lining crucible (1), a lining crucible (3) is placed above the substrate groove (2), and a single crystal high-temperature alloy ingot to be smelted is placed in the lining crucible (3) for refining.
2. The nested combination crucible for induction melting of claim 1, wherein: the outer lining crucible (1) and the inner lining crucible (3) are both aluminum crucibles manufactured by the same process, and the high-temperature sintering temperature after isostatic pressing is not lower than 1650 ℃.
3. The nested combination crucible for induction melting of claim 1, wherein: the substrate groove (2) is made of graphite.
4. The nested combination crucible for induction melting of claim 1, wherein: the thickness value of the side wall of the substrate groove (2) is not less than 2 times of the thickness value of the side wall of the lining crucible (3).
5. The nested combination crucible for induction melting of claim 1, wherein: the clearance between the outer side wall surface of the substrate groove (2) and the inner side wall surface of the outer lining crucible (1) is less than 3 mm.
6. The nested combination crucible for induction melting of claim 1, wherein: the clearance between the outer side wall surface of the lining crucible (3) and the inner side wall surface of the outer lining crucible (1) is 5-10 mm.
7. The nested combination crucible for induction melting of claim 1, wherein: the height of the top end face of the lining crucible (3) is higher than that of the top end face of the outer lining crucible (1), and the height difference of the two end faces is 8-15 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121353338.7U CN215810161U (en) | 2021-06-17 | 2021-06-17 | Nested combined crucible for induction smelting |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121353338.7U CN215810161U (en) | 2021-06-17 | 2021-06-17 | Nested combined crucible for induction smelting |
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| CN215810161U true CN215810161U (en) | 2022-02-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114635182A (en) * | 2022-03-30 | 2022-06-17 | 福建福晶科技股份有限公司 | Crystal production and lifting device and method convenient for discharging crystals |
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2021
- 2021-06-17 CN CN202121353338.7U patent/CN215810161U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114635182A (en) * | 2022-03-30 | 2022-06-17 | 福建福晶科技股份有限公司 | Crystal production and lifting device and method convenient for discharging crystals |
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