CN211360654U - Molybdenum alloy heat shield for closed hot isostatic pressing - Google Patents
Molybdenum alloy heat shield for closed hot isostatic pressing Download PDFInfo
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- CN211360654U CN211360654U CN201921642812.0U CN201921642812U CN211360654U CN 211360654 U CN211360654 U CN 211360654U CN 201921642812 U CN201921642812 U CN 201921642812U CN 211360654 U CN211360654 U CN 211360654U
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- molybdenum
- heat shield
- hot isostatic
- isostatic pressing
- end cover
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- 238000001513 hot isostatic pressing Methods 0.000 title claims abstract description 21
- 229910001182 Mo alloy Inorganic materials 0.000 title claims abstract description 18
- ZOKXTWBITQBERF-UHFFFAOYSA-N Molybdenum Chemical compound [Mo] ZOKXTWBITQBERF-UHFFFAOYSA-N 0.000 claims abstract description 60
- 229910052750 molybdenum Inorganic materials 0.000 claims abstract description 49
- 239000011733 molybdenum Substances 0.000 claims abstract description 49
- 238000010438 heat treatment Methods 0.000 claims abstract description 13
- 238000007750 plasma spraying Methods 0.000 claims abstract description 4
- 238000000748 compression moulding Methods 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 5
- 238000009826 distribution Methods 0.000 abstract description 3
- 239000010410 layer Substances 0.000 description 18
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000013078 crystal Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- 229910045601 alloy Inorganic materials 0.000 description 1
- 239000000956 alloy Substances 0.000 description 1
- 238000005266 casting Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000010310 metallurgical process Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004663 powder metallurgy Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
- 238000005096 rolling process Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000002356 single layer Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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Abstract
A molybdenum alloy heat shield for closed hot isostatic pressing comprises a molybdenum end cover and a cylinder body which are riveted, wherein the molybdenum end cover is integrally formed by stamping, a molybdenum plate is heated to the surface temperature of 600-700 ℃ and then is stamped and formed at high temperature through a 2000-ton press and a concave-convex die, the cylinder body comprises a multi-layer splicing structure in the height direction, and each layer of splicing structure consists of a plurality of rolled molybdenum plates; the splicing seams between the molybdenum end cover and the cylinder body, between two adjacent molybdenum plates and between the upper and lower layers of splicing structures are riveted through the lapping strips and the rivets, and the riveted splicing seams are sealed by plasma spraying molybdenum powder; the utility model discloses can improve the homogeneity of the inside temperature distribution of heat shield device, make it possess stronger anti high temperature deformability and high temperature high pressure stability, extension fixture's life to practice thrift the heat energy consumption, reduce device heating power.
Description
Technical Field
The utility model relates to a molybdenum alloy processing field, more specifically say, relate to a molybdenum alloy heat shield for enclosed type hot isostatic pressing.
Background
With the improvement of the technological level, Hot Isostatic Pressing (HIP) is rapidly developed, is no longer a special technology for powder metallurgy, has an ever-expanding application range, and is gradually and widely applied to the production fields of diffusion welding of workpieces, elimination of casting defects, manufacturing of complex special-shaped parts and the like. The workpiece product prepared by the hot isostatic pressing technology can avoid chemical composition segregation existing in the traditional metallurgical process, so that the metallurgical product has higher alloy content, and a large-scale metallurgical part with a complex shape and no residual pores can be directly prepared, so that the strength and toughness of the workpiece product are obviously improved, and the method has greater superiority.
The hot isostatic pressing device belongs to special heat treatment equipment strictly, and the uniformity of temperature has important significance on the performance of a finished piece, so that the hot isostatic pressing device has higher requirements on the heat resistance and the strength of a heat shield. In the prior art, the heating temperature of each single-layer heat shield from inside to outside is higher after the heating element is heated, and the heat shield is deformed due to the conditions of self expansion and contraction, uneven internal stress and the like of the heat shield, so that the temperature field is uneven, and the service life of the heat shield is greatly shortened. Meanwhile, due to the restriction of equipment factors and process conditions, large-sized molybdenum sheets are difficult to produce, and the purpose of rolling a single molybdenum sheet into a heat shield drum is achieved, so that 2-4 molybdenum sheets are generally adopted to splice in the height direction for producing drum heat shields with the height of more than 680mm, gaps exist at the spliced positions, certain temperature difference exists between the gaps and thermal fields of other areas, internal stress of heating crystals in a furnace is easily generated, the crystals crack, and the product quality is affected. Therefore, aiming at the defects in the technology, the traditional hot isostatic pressing heat shield device is improved, the system stability of the device under the conditions of high temperature and high pressure is improved, and the device has great research and development significance and practical prospect.
SUMMERY OF THE UTILITY MODEL
In view of this, for solving above-mentioned prior art not enough, the utility model aims at providing a molybdenum alloy heat shield for closed hot isostatic pressing improves the homogeneity of the inside temperature distribution of heat shield device, makes it possess stronger anti high temperature deformability and high temperature high pressure stability, the life of extension device to practice thrift heat energy consumption, reduction device heating power.
In order to achieve the above object, the utility model adopts the following technical scheme:
a molybdenum alloy heat shield for closed hot isostatic pressing comprises a molybdenum end cover and a cylinder body, wherein the molybdenum end cover is riveted, the molybdenum end cover is integrally formed by stamping, the cylinder body comprises a multi-layer splicing structure in the height direction, and each layer of splicing structure consists of a plurality of molybdenum plates after being rolled; the splicing seams between the molybdenum end cover and the cylinder body, between two adjacent molybdenum plates and between the upper layer and the lower layer of the splicing structure are riveted through the lapping strips and the rivets, and the spliced seams after riveting are provided with molybdenum powder layers.
Further, the cylinder is of an 8-layer splicing structure.
Further, the diameter of the cylinder is 1490-1510 mm, and the height of the cylinder is greater than 5000 mm.
Further, the molybdenum end cover is formed by heating a molybdenum plate to the surface temperature of 600-700 ℃ and then performing compression molding at high temperature through a 2000-ton press and a concave-convex die.
Further, the width of the lapping strip is 95-105 mm, and the lapping strip is uniformly provided with a plurality of rows of rivet holes in the width direction.
Further, the molybdenum powder layer is formed at the splicing seam by molybdenum powder plasma spraying.
Further, the distance between two adjacent rows of rivet holes is 7-8 mm, and the diameter of rivet hole is 5.5-9 mm.
The utility model has the advantages that:
1. the heat shield comprises a molybdenum end cover and a cylinder body formed by molybdenum plates, wherein the molybdenum has good heat conductivity and low expansion coefficient, the high-temperature resistance is strong, the heat shield shell made of the molybdenum has even heat conduction, the expansion action force is small when meeting high temperature, and higher strength and stability can be still kept under the high-temperature condition;
2. the molybdenum end cover of the heat shield adopts a stamping integral forming structure, heats the molybdenum plate to the surface temperature of 600 plus 700 ℃, and punches the molybdenum plate through a 2000-ton press and a concave-convex mould at high temperature, so that the molybdenum end cover has good structural strength and sealing performance, and can ensure the heat preservation and heat insulation performance of a large hot isostatic pressure thermal field;
3. the utility model discloses a heat shield barrel forms the barrel that highly is greater than 5000mm by multilayer mosaic structure, and every layer of mosaic structure comprises the molybdenum plate after the board is rolled up by the polylith again, to the reel heat shield that highly is greater than 680mm of production, exists the clearance easily in concatenation department, leads to this clearance department and other regional heat fields to have certain difference in temperature to the production of stove internal heating crystal stress has been caused, the utility model discloses a between molybdenum end cover and barrel, two-layer from top to bottom between two adjacent molybdenum plates set up between the mosaic structure and take strip and rivet to at concatenation seam department spraying molybdenum powder layer, form very fine and close surface texture, further strengthen the structural strength and the sealing performance of heat shield, can effectively obstruct thermal outwards scattering and disappearing, reduced the energy consumption, improved energy utilization and heating efficiency effectively.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings 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 of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic view of a molybdenum alloy heat shield;
FIG. 2 is a schematic structural view of the cartridge;
FIG. 3 is a schematic view of the structure of the strap;
reference numerals: 1. molybdenum end cover, 2, barrel, 3, molybdenum plate, 4, lapping strip, 5, rivet, 6, rivet hole.
Detailed Description
The following provides specific embodiments, which will further clearly, completely and specifically explain the technical solutions of the present invention. The present embodiment is the best embodiment based on the technical solution of the present invention, but the scope of the present invention is not limited to the following embodiments.
A molybdenum alloy heat shield for closed hot isostatic pressing comprises a molybdenum end cover 1 and a cylinder body 2 which are riveted, wherein molybdenum has good heat conductivity and low expansion coefficient and strong high-temperature resistance, and a heat shield shell made of the molybdenum alloy heat shield has uniform heat conduction and small expansion force when meeting high temperature, and can still keep higher strength and stability under the high-temperature condition;
the molybdenum end cover 1 is integrally formed by punching: the molybdenum end cover 1 is formed by heating a molybdenum plate 3 to the surface temperature of 600-700 ℃ and then performing compression molding at high temperature through a 2000-ton press and a concave-convex mold, has good structural strength and sealing performance, and can ensure the heat preservation and heat insulation performance of a large hot isostatic pressing thermal field;
the cylinder body 2 comprises 8 layers of splicing structures in the height direction, each layer of splicing structure consists of a plurality of molybdenum plates 3 after being rolled, the diameter of the cylinder body 2 is 1490-1510 mm, and the height of the cylinder body is greater than 5000 mm; to the reel heat screen that highly is greater than 680mm of production, there is the clearance easily in concatenation department, leads to this clearance department and other regional thermal fields to have certain difference in temperature to the production of furnace internal heating crystal internal stress has been caused, the utility model discloses a between molybdenum end cover 1 and barrel 2, between two adjacent molybdenum plates 3, upper and lower two-layer it takes strip 4 and rivet 5 to rivet to set up between the mosaic structure to at concatenation seam department spraying molybdenum powder layer, form very fine and close surface texture, further strengthen the structural strength and the sealing performance of heat screen, can effectively the thermal outside scattering and disappearing of separation, has cut down the energy consumption, has improved energy utilization and heating efficiency effectively, and the operation is as follows:
the splicing seams between the molybdenum end cover 1 and the cylinder body 2, between two adjacent molybdenum plates 3 and between the upper and lower layers of splicing structures are riveted through the lapping strips 4 and the rivets 5, when the lapping strips 4 are used for riveting, the molybdenum plates 3 of each layer of splicing structures are riveted through the lapping strips 4 to form the cylinder bodies with lower heights, then the cylinder bodies of each layer are riveted through the lapping strips 4 to form the cylinder bodies with the heights larger than 5000mm, and then the top ends of the cylinder bodies are riveted with the molybdenum end cover 1 through the lapping strips 4; the width of each lapping strip 4 is 95-105 mm, multiple rows of rivet holes 6 are uniformly formed in each lapping strip 4 in the width direction, so that the rivet parts are tightly combined, the distance between every two adjacent rows of rivet holes 6 is 7-8 mm, and the diameter of each rivet hole 6 is 5.5-9 mm;
grinding the spliced seam after riveting, and performing plasma spraying of molybdenum powder at the spliced seam to form a compact and firm spraying layer; then, the sprayed surface is polished and gas is pressurized and detected, so that the whole cylinder body 2 is ensured to be airtight;
the utility model provides a molybdenum alloy heat shield for enclosed type hot isostatic pressing can improve the homogeneity of the inside temperature distribution of heat shield device, makes it possess stronger anti high temperature deformability and high temperature high pressure stability, extension fixture's life to practice thrift the heat energy consumption, reducing means power that generates heat.
The essential features, the basic principle and the advantages of the invention have been shown and described above. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only illustrative of the principles of the present invention, and that the present invention can be modified in various ways according to the actual situation without departing from the spirit and scope of the present invention, and these modifications and improvements are all within the scope of the present invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (7)
1. The molybdenum alloy heat shield for the closed hot isostatic pressing is characterized by comprising a riveted molybdenum end cover (1) and a cylinder body (2), wherein the molybdenum end cover (1) is integrally formed by stamping, the cylinder body (2) comprises a multi-layer splicing structure in the height direction, and each layer of splicing structure consists of a plurality of molybdenum plates (3) after being rolled; the molybdenum end cover is characterized in that the splicing seams between the molybdenum end cover (1) and the cylinder body (2), between two adjacent molybdenum plates (3) and between the upper layer and the lower layer of the splicing structures are riveted through the lapping strips (4) and the rivets (5), and the riveted splicing seams are provided with molybdenum powder layers.
2. The molybdenum alloy heat shield for closed hot isostatic pressing according to claim 1, wherein the cartridge (2) is an 8-layer split structure.
3. The molybdenum alloy heat shield for closed hot isostatic pressing according to claim 1, wherein the diameter of the cylinder (2) is 1490-1510 mm and the height is greater than 5000 mm.
4. The molybdenum alloy heat shield for the closed hot isostatic pressing according to claim 1, wherein the molybdenum end cover (1) is formed by heating the molybdenum plate (3) to a surface temperature of 600-700 ℃ and then performing compression molding at a high temperature by using a 2000-ton press and a concave-convex mold.
5. The molybdenum alloy heat shield for closed hot isostatic pressing according to claim 1, wherein the width of the lapping strip (4) is 95-105 mm, and the lapping strip (4) is provided with a plurality of rows of rivet holes (6) uniformly in the width direction.
6. The molybdenum alloy heat shield for closed hot isostatic pressing according to claim 1, wherein the molybdenum powder layer is formed by plasma spraying molybdenum powder at the joint line.
7. The molybdenum alloy heat shield for closed hot isostatic pressing according to claim 5, wherein the spacing between two adjacent rows of the rivet holes (6) is 7-8 mm, and the diameter of the rivet holes (6) is 5.5-9 mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921642812.0U CN211360654U (en) | 2019-09-29 | 2019-09-29 | Molybdenum alloy heat shield for closed hot isostatic pressing |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921642812.0U CN211360654U (en) | 2019-09-29 | 2019-09-29 | Molybdenum alloy heat shield for closed hot isostatic pressing |
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| CN211360654U true CN211360654U (en) | 2020-08-28 |
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| CN201921642812.0U Active CN211360654U (en) | 2019-09-29 | 2019-09-29 | Molybdenum alloy heat shield for closed hot isostatic pressing |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113943910A (en) * | 2021-08-26 | 2022-01-18 | 张小静 | Molybdenum plate stretching heat treatment annealing treatment die |
-
2019
- 2019-09-29 CN CN201921642812.0U patent/CN211360654U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113943910A (en) * | 2021-08-26 | 2022-01-18 | 张小静 | Molybdenum plate stretching heat treatment annealing treatment die |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A closed molybdenum alloy heat insulation screen for hot isostatic pressing Effective date of registration: 20220418 Granted publication date: 20200828 Pledgee: Bank of China Limited by Share Ltd. Luoyang branch Pledgor: Achemetal Tungsten AND Molybdenum Co.,Ltd. Registration number: Y2022980004337 |
|
| PC01 | Cancellation of the registration of the contract for pledge of patent right | ||
| PC01 | Cancellation of the registration of the contract for pledge of patent right |
Granted publication date: 20200828 Pledgee: Bank of China Limited by Share Ltd. Luoyang branch Pledgor: Achemetal Tungsten AND Molybdenum Co.,Ltd. Registration number: Y2022980004337 |