CN211938997U - Stainless steel/carbon steel composite pipe pouring system and production system - Google Patents
Stainless steel/carbon steel composite pipe pouring system and production system Download PDFInfo
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- CN211938997U CN211938997U CN202020099211.6U CN202020099211U CN211938997U CN 211938997 U CN211938997 U CN 211938997U CN 202020099211 U CN202020099211 U CN 202020099211U CN 211938997 U CN211938997 U CN 211938997U
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- 239000002131 composite material Substances 0.000 title claims abstract description 63
- 239000010935 stainless steel Substances 0.000 title claims abstract description 35
- 229910001220 stainless steel Inorganic materials 0.000 title claims abstract description 35
- 229910000975 Carbon steel Inorganic materials 0.000 title claims abstract description 31
- 239000010962 carbon steel Substances 0.000 title claims abstract description 31
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 28
- 239000000919 ceramic Substances 0.000 claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 40
- 238000005266 casting Methods 0.000 claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 26
- 229910000831 Steel Inorganic materials 0.000 claims description 41
- 239000010959 steel Substances 0.000 claims description 41
- 238000001816 cooling Methods 0.000 claims description 11
- 230000003028 elevating effect Effects 0.000 claims description 8
- 238000005496 tempering Methods 0.000 claims description 8
- 230000007704 transition Effects 0.000 claims description 6
- 238000010791 quenching Methods 0.000 claims description 5
- 230000000171 quenching effect Effects 0.000 claims description 5
- 239000000758 substrate Substances 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 2
- 238000002203 pretreatment Methods 0.000 claims 1
- 238000000034 method Methods 0.000 abstract description 27
- 230000008569 process Effects 0.000 abstract description 16
- 239000007788 liquid Substances 0.000 abstract description 12
- 238000013329 compounding Methods 0.000 abstract description 4
- 238000005098 hot rolling Methods 0.000 abstract description 3
- 230000004927 fusion Effects 0.000 abstract description 2
- 238000010114 lost-foam casting Methods 0.000 abstract description 2
- 238000007528 sand casting Methods 0.000 abstract description 2
- 239000000463 material Substances 0.000 description 6
- 238000005260 corrosion Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 3
- 238000004064 recycling Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 description 2
- 238000009750 centrifugal casting Methods 0.000 description 2
- 150000001875 compounds Chemical class 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000000137 annealing Methods 0.000 description 1
- 229910052786 argon Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000007730 finishing process Methods 0.000 description 1
- 238000001192 hot extrusion Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 238000005498 polishing Methods 0.000 description 1
- 229910052573 porcelain Inorganic materials 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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Abstract
The utility model discloses a stainless steel/carbon steel composite pipe casting system and a production system, which comprises a casting system, a pretreatment mechanism for treating a base layer pipe before casting, a heating furnace, a heating system and a heat treatment mechanism for heat treating the cast composite pipe; the heating system and the atmosphere protection system are respectively communicated with the heating furnace through pipelines; the system has a reliable structure and high automation degree, does not need a large amount of manual operation, and improves the stability and the production efficiency of products; the system adopts a solid-liquid composite structure to produce the stainless steel/carbon steel composite pipe, so that the requirement of the production process on the vacuum degree is reduced, metallurgical bonding is realized between stainless steel/carbon steel interfaces through fusion, and the strength is enough to meet the requirement of subsequent hot rolling production; and the system simplifies the complicated preposed process flow when the sand casting or the lost foam casting is adopted for solid-liquid compounding by designing the inner and outer double-layer ceramic molds, and can meet the production requirements of various specifications and components.
Description
Technical Field
The utility model relates to a bimetal combined material's preparation field, concretely relates to compound pipe the gating system of stainless steel/carbon steel and production system.
Background
The bimetal composite material is a novel material prepared by compounding two metals with different properties by various compounding technologies, not only exerts the corrosion resistance, heat resistance, wear resistance and other properties of a composite layer material, but also combines the strength and rigidity of a base material, so that the bimetal composite material obtains comprehensive properties which can not be achieved by a single component metal, and is more suitable for the rapid development of industry and science and technology and higher requirements on the material.
The stainless steel composite pipe is suitable for high-corrosion environment by combining a layer of layered composite material with high-corrosion resistance stainless steel on a carbon steel or low-alloy steel pipe by a certain process, greatly saves the consumption of expensive stainless steel and obviously reduces the production cost. The existing bimetal composite pipe forming technology mainly comprises a mechanical forming method and a metallurgical forming method, wherein the mechanical forming method mainly comprises a mechanical expanding method, an explosion expanding method, a sizing method and the like, and the metallurgical forming method mainly comprises a hot rolling method, a hot extrusion method, a centrifugal casting method and the like.
In summary, at present, no production system for efficiently producing large-size carbon steel/stainless steel composite pipes by a solid-liquid composite method exists. In order to solve the problems of temperature control, surface quality and production efficiency in the solid-liquid composite pouring process of the composite pipe, the development of a novel carbon steel/stainless steel solid-liquid composite pouring device and a production system is particularly critical.
SUMMERY OF THE UTILITY MODEL
To the problem that prior art exists, the utility model provides a compound pipe the gating system of stainless steel/carbon steel and production system.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a stainless steel/carbon steel composite pipe pouring system comprises a pouring area, a base layer pipe, a rotating assembly for driving the base layer pipe to rotate, a ceramic mold, a steel containing barrel and a lifting mechanism;
basic unit's pipe is in through the vertical setting of rotating assembly in the pouring district, ceramic mold is located basic unit's intraduct and respectively with all have the pouring cavity between basic unit's inside pipe wall and the diapire, flourishing steel drum is located basic unit intraductal and with the steel channel of watering has between the ceramic mold top, water the steel channel with the pouring cavity is linked together, elevating system's lower extreme respectively with flourishing steel drum is connected with ceramic mold, through elevating system drives flourishing steel drum and ceramic mold and follows the vertical lift of basic unit pipe.
Further, in the preferred embodiment of the present invention, the lifting mechanism includes a driving member and a lifting positioning shaft connected to the driving member, and the lower end of the lifting positioning shaft is connected to the steel barrel and the ceramic mold respectively.
Further, in a preferred embodiment of the present invention, the ceramic mold comprises an inlet section, an outlet section located below the inlet section, and a transition section connected between the inlet section and the outlet section;
the diameter of the inlet section is smaller than that of the outlet section, so that the whole ceramic die is of a taper structure, and the taper is 0.5%/m-3%/m.
Further, in a preferred embodiment of the present invention, a temperature control device and a flow control device are disposed in the steel barrel.
Further, in the preferred embodiment of the present invention, a cooling system is disposed at the bottom end of the substrate tube and corresponding to the ceramic mold, and the composite layer leaving the ceramic mold is cooled by the cooling system.
Further, in the preferred embodiment of the present invention, an atmosphere protection system is disposed below the casting area.
The utility model also provides a stainless steel/carbon steel composite pipe production system, which comprises the above casting system, a pretreatment mechanism for treating the base layer pipe before casting, a heating furnace, a heating system and a heat treatment mechanism for heat treating the cast composite pipe; the heating system and the atmosphere protection system are respectively communicated with the heating furnace through pipelines.
Further, in the preferred embodiment of the present invention, the pretreatment mechanism includes a finishing member for finishing the base pipe and a scrap recycling bin located below the base pipe.
Further, in a preferred embodiment of the present invention, the heat treatment mechanism includes a heat treatment tank for quenching the cast composite pipe and a tempering portion for performing medium-temperature tempering on the quenched composite pipe.
Further, in the preferred embodiment of the present invention, the base layer pipe before casting is lifted and moved to the casting area by the lifting device, and the composite pipe after casting is lifted and moved to the heat treatment tank and the tempering treatment portion.
The utility model discloses following beneficial effect has: the stainless steel/carbon steel composite pipe casting system and the production system provided by the utility model have the advantages of reliable structure, high automation degree, no need of a large amount of manual operation, smooth production flow and improved product stability and production efficiency; the system adopts a solid-liquid composite structure to produce the stainless steel/carbon steel composite pipe, so that the requirement of the production process on the vacuum degree is reduced, metallurgical bonding is realized between stainless steel/carbon steel interfaces through fusion, and the strength is enough to meet the requirement of subsequent hot rolling production; the system simplifies the complicated preposed process flow when the sand casting or the lost foam casting is adopted for solid-liquid compounding by designing the inner and outer double-layer ceramic molds, and can adapt to the production requirements of various specifications and various components; simultaneously, the ceramic mold can be repeatedly utilized, so that the stainless steel ceramic mold is prevented from bulging and deforming while the ceramic mold is convenient to transport, and the surface quality of the multilayer is improved.
Drawings
FIG. 1 is a schematic view of a pouring system of the present invention;
FIG. 2 is a schematic structural view of a ceramic mold according to the present invention;
FIG. 3 is a schematic structural view of a production system of the present invention;
in the figure: 1-pouring area, 2-base layer pipe, 3-rotating assembly, 4-ceramic mould, 5-steel containing barrel, 6-lifting mechanism, 7-pouring cavity, 8-steel pouring channel, 9-driving piece, 10-lifting positioning shaft, 40-inlet section, 41-outlet section, 42-transition section, 12-cooling system, 13-atmosphere protection system, 14-pretreatment mechanism, 15-heating furnace, 16-heating system, 17-heat treatment mechanism and 140-scrap steel recovery barrel.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, a stainless steel/carbon steel composite pipe casting system comprises a casting area 1, a base pipe 2, a rotating assembly 3 for driving the base pipe 2 to rotate, a ceramic mold 4, a steel containing barrel 5 and a lifting mechanism 6.
The carbon steel/stainless steel composite pipe has the pipe diameter of 100-6000mm and the height of 500-6000mm, the outer wall is a base layer pipe 2, the thickness of 100-300mm, the inner wall is a composite layer, and the thickness of 10-30 mm. The base layer pipe 2 can be made of a stainless steel pipe or a carbon steel pipe, stainless steel liquid or carbon steel liquid can be contained in the steel containing barrel 5 and serves as a composite layer compounded on the inner wall of the base layer pipe 2, and the composite layer is made of a material different from that of the base layer pipe 2.
The high-temperature ceramic die 4 is made of alumina. The preheated base layer pipe 2 is lifted to the pouring area 1 and is positioned through the rotating component 3, the ceramic mold 4 is lowered to the bottom of the base layer pipe 2 through the top lifting mechanism 6, the ceramic mold 4 is preheated to 1400 ℃ before pouring, the ceramic mold 4 and the base layer pipe 2 are centered through the positioning shaft of the lifting mechanism 6, the ceramic mold and the base layer pipe are separated by the pouring cavity 7, and the preferred distance is 15mm, namely the thickness of the multiple layers of the composite layer to be poured. The top of the high porcelain mold is provided with a steel containing barrel 5 which is used for containing composite layer molten steel and controlling the casting superheat degree to be 50-70 ℃ on a liquid phase line, in the casting process, a steel outlet of the steel containing barrel 5 is opened, the molten steel flows into a steel casting channel 8 from the steel outlet and then flows into a casting cavity 7, the casting speed is controlled by a flow control device inside the steel containing barrel 5, meanwhile, a top lifting mechanism 6 drives a ceramic mold 4 to ascend at the speed of 1.2mm/s, a base layer pipe 2 is driven by a rotating assembly 3 to rotate at the speed of 15 rpm in the process, the bottom of the ceramic mold 4 is provided with a cooling system 12, and the inner wall of a stainless steel clad layer just leaving the contact surface of the ceramic mold 4 is cooled at the speed of not less than 20 ℃/s through high-pressure argon in the mold lifting process. Therefore, inert atmosphere or reducing atmosphere is kept in the pouring area 1 in the whole pouring process, and the pouring effect is ensured. The utility model discloses a pouring on one side in the pouring process removes ceramic mould and still cool off the blank shell of ceramic mould below simultaneously, under ceramic mould's extrusion, make the surface quality of composite bed compare in centrifugal casting's solid-liquid combination mode obviously improve, make the composite bed inner wall level and smooth, avoid producing irregular shape, still can improve the inside quality of composite bed through ceramic mould extrusion simultaneously, improve the problem of sombrerous (shrinkage cavity) and segregation, and can also improve the cohesion between composite bed and the basic unit, and ceramic mould removes the process and also is the drawing of patterns process, when pouring liquid pours into a mould to basic unit's pipe top, ceramic mould removes to the top, remove the basic unit outside of tubes at last, whole process flow is very smooth and easy and swift, the production efficiency is greatly improved.
In order to improve elevating system 6's performance, the utility model discloses in, elevating system 6 includes driving piece 9 and connects the lift location axle 10 on driving piece 9, and the lower extreme of lift location axle 10 is connected with flourishing steel drum 5 and ceramic mould 4 respectively. The lifting positioning shaft 10 is driven to lift by the driving action of the driving piece 9, and then the steel containing barrel 5 and the ceramic mold 4 are driven to lift at a certain speed, the lifting is reliable and stable, and the uniformity of molten steel flowing out into the pouring cavity 7 in the lifting process is improved.
In order to improve the quality of the interior and the surface of the composite layer, as shown in fig. 2, in the present invention, the ceramic mold 4 includes an inlet section 40, an outlet section 41 located below the inlet section 40, and a transition section 42 connected between the inlet section 40 and the outlet section 41; the diameter of the inlet section 40 is smaller than that of the outlet section 41, and the transition section 42 is in a taper structure, and the taper is 0.5%/m-3%/m. The length of the transition section 42 is 150mm, and the composite layer which is not completely solidified can be extruded in the pouring process, so that the internal and surface quality of the composite layer is improved.
As shown in fig. 3, the utility model also provides a production system of stainless steel/carbon steel composite pipe, which comprises a casting system, a pretreatment mechanism 14 for treating the base pipe 2 before casting, a heating furnace 15, a heating system 16 and a heat treatment mechanism 17 for heat treating the cast composite pipe; the heating system 16 and the atmosphere protection system 13 are respectively communicated with the heating furnace 15 through pipelines.
The inner wall of the substrate tube 2 is finished by a pretreatment mechanism 14 to further improve the roughness to increase the carbon steel/stainless steel bonding surface area and bonding strength. Preheating the base layer pipe 2 by a heating furnace 15, preheating the base layer pipe 2 by utilizing the internal environment temperature of the heating furnace 15, heating the inner wall of the base layer pipe 2 by a heating system 16 before casting until the base layer pipe 2 reaches the preset heating temperature of 100-1800 ℃, the preheating time is 0.1-10 hours, and keeping inert atmosphere or reducing atmosphere in the heating furnace 15 in the whole preheating process. As mentioned above, the solid-liquid composition of the base layer pipe 2 and the composite molten steel is realized through the pouring system, and the composite pipe structure after composition is reliable and has good quality. And the compounded composite pipe is hoisted and moved to a heat treatment mechanism 17 through a lifting appliance, and a cooling and heat treatment operation process is formulated according to production requirements, wherein the cooling mode comprises one or more of furnace cooling, air cooling, stack cooling, water quenching and oil quenching, and the heat treatment process flow comprises one or more of annealing, normalizing, tempering and quenching. And finishing and packaging after the flaw detection is qualified.
The pretreatment mechanism 14 includes a finishing member for finishing the base pipe 2 and a scrap collecting tub 140 located below the base pipe 2. In the finishing process, the inner wall of the base layer pipe 2 is subjected to thread machining, polishing or corrosion and other modes through the finishing piece, so that the roughness is improved, the steel scraps after finishing are dropped into the scrap steel recycling bin 140 to be recycled, the pollution to the machining environment is avoided, and the recycled steel scraps can be used for other machining, and recycling is realized.
And hoisting and moving the base layer pipe 2 before casting into the casting area through a hoisting tool, and hoisting and moving the cast composite pipe to a heat treatment tank and a tempering treatment part. The base layer pipe 2 and the poured composite pipe are in an upright state in the whole production process and are transported through a top lifting appliance and a guide rail in the heating furnace 15.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (10)
1. A stainless steel/carbon steel composite pipe pouring system is characterized by comprising a pouring area (1), a base layer pipe (2), a rotating assembly (3) for driving the base layer pipe (2) to rotate, a ceramic mold (4), a steel containing barrel (5) and a lifting mechanism (6);
base course pipe (2) are in through the vertical setting of rotating assembly (3) in pouring district (1), ceramic mold (4) are located inside base course pipe (2) and respectively with all have pouring cavity (7) between base course pipe (2) inner wall and the diapire, flourishing steel drum (5) are located in base course pipe (2) and with ceramic mold (4) top between have pour steel passageway (8), pour steel passageway (8) with pouring cavity (7) are linked together, the lower extreme of elevating system (6) respectively with flourishing steel drum (5) are connected with ceramic mold (4), through elevating system (6) drive flourishing steel drum (5) and ceramic mold (4) are followed base course pipe (2) vertical lift.
2. The stainless steel/carbon steel composite pipe pouring system according to claim 1, wherein the lifting mechanism (6) comprises a driving member (9) and a lifting positioning shaft (10) connected to the driving member (9), and the lower end of the lifting positioning shaft (10) is connected to the steel containing barrel (5) and the ceramic mold (4), respectively.
3. The stainless steel/carbon steel composite pipe gating system according to claim 1, wherein the ceramic mold (4) comprises an inlet section (40), an outlet section (41) located below the inlet section (40), and a transition section (42) connected between the inlet section (40) and the outlet section (41);
the diameter of the inlet section (40) is smaller than that of the outlet section (41), the transition section is of a taper structure, and the taper is 0.5%/m-3%/m.
4. The stainless steel/carbon steel composite pipe casting system according to claim 1, wherein a temperature control device and a flow control device are arranged in the steel barrel (5).
5. The stainless steel/carbon steel composite pipe gating system according to claim 4, characterized in that a cooling system (12) is arranged at the bottom end of the base pipe (2) and corresponding to the ceramic mold (4), and the composite layer leaving the ceramic mold (4) is cooled by the cooling system (12).
6. The stainless steel/carbon steel composite pipe gating system according to any one of claims 1 to 5, characterized in that an atmosphere protection system (13) is arranged below the gating area (1).
7. A stainless steel/carbon steel composite pipe production system, characterized by comprising the casting system according to claim 6, further comprising a pretreatment mechanism (14) for treating the base pipe (2) before casting, a heating furnace (15), a heating system (16), and a heat treatment mechanism (17) for heat-treating the cast composite pipe; the heating system (16) and the atmosphere protection system (13) are respectively communicated with the heating furnace (15) through pipelines.
8. A stainless steel/carbon steel composite pipe production system according to claim 7, characterized in that the pre-treatment mechanism (14) comprises a finishing piece for finishing the substrate pipe (2) and a scrap recovery barrel (140) located below the substrate pipe (2).
9. A stainless steel/carbon steel composite pipe production system according to claim 7, wherein the heat treatment mechanism (17) comprises a heat treatment tank for quenching the cast composite pipe and a tempering treatment section for medium-temperature tempering the quenched composite pipe.
10. The system for producing the stainless steel/carbon steel composite pipe according to claim 9, wherein the base pipe (2) before casting is hoisted and moved into the casting area by a hoisting tool, and the composite pipe after casting is hoisted and moved to the heat treatment tank and the tempering treatment part.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020099211.6U CN211938997U (en) | 2020-01-16 | 2020-01-16 | Stainless steel/carbon steel composite pipe pouring system and production system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020099211.6U CN211938997U (en) | 2020-01-16 | 2020-01-16 | Stainless steel/carbon steel composite pipe pouring system and production system |
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| CN211938997U true CN211938997U (en) | 2020-11-17 |
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| CN202020099211.6U Expired - Fee Related CN211938997U (en) | 2020-01-16 | 2020-01-16 | Stainless steel/carbon steel composite pipe pouring system and production system |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111230072A (en) * | 2020-01-16 | 2020-06-05 | 青岛力晨新材料科技有限公司 | Stainless steel/carbon steel composite pipe pouring system and pouring process thereof |
| CN113059020A (en) * | 2021-04-01 | 2021-07-02 | 青岛力晨新材料科技有限公司 | Bimetal composite pipe and preparation method thereof |
| CN114054722A (en) * | 2021-11-18 | 2022-02-18 | 河北工业大学 | High-overload-resistant foamed zinc-aluminum eutectoid alloy/aluminum alloy composite material and preparation method thereof |
| CN115194007A (en) * | 2022-09-16 | 2022-10-18 | 南通科沃纺织有限公司 | Mechanical part punching machine of textile machine |
| CN117983796A (en) * | 2024-04-02 | 2024-05-07 | 江苏亚立特钢有限公司 | Stainless steel round tube production casting equipment |
-
2020
- 2020-01-16 CN CN202020099211.6U patent/CN211938997U/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111230072A (en) * | 2020-01-16 | 2020-06-05 | 青岛力晨新材料科技有限公司 | Stainless steel/carbon steel composite pipe pouring system and pouring process thereof |
| CN111230072B (en) * | 2020-01-16 | 2021-11-02 | 青岛力晨新材料科技有限公司 | Stainless steel/carbon steel composite pipe pouring system and pouring process thereof |
| CN113059020A (en) * | 2021-04-01 | 2021-07-02 | 青岛力晨新材料科技有限公司 | Bimetal composite pipe and preparation method thereof |
| CN114054722A (en) * | 2021-11-18 | 2022-02-18 | 河北工业大学 | High-overload-resistant foamed zinc-aluminum eutectoid alloy/aluminum alloy composite material and preparation method thereof |
| CN115194007A (en) * | 2022-09-16 | 2022-10-18 | 南通科沃纺织有限公司 | Mechanical part punching machine of textile machine |
| CN115194007B (en) * | 2022-09-16 | 2023-11-14 | 北京中智蓝瑞机械设备有限公司 | Punching machine for mechanical parts of textile machine |
| CN117983796A (en) * | 2024-04-02 | 2024-05-07 | 江苏亚立特钢有限公司 | Stainless steel round tube production casting equipment |
| CN117983796B (en) * | 2024-04-02 | 2024-06-04 | 江苏亚立特钢有限公司 | Stainless steel round tube production casting equipment |
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Granted publication date: 20201117 |