CN111136247A - A stainless steel/carbon steel composite pipe casting system and production system - Google Patents
A stainless steel/carbon steel composite pipe casting system and production system Download PDFInfo
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- CN111136247A CN111136247A CN202010045172.6A CN202010045172A CN111136247A CN 111136247 A CN111136247 A CN 111136247A CN 202010045172 A CN202010045172 A CN 202010045172A CN 111136247 A CN111136247 A CN 111136247A
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- 239000002131 composite material Substances 0.000 title claims abstract description 68
- 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 29
- 238000005266 casting Methods 0.000 title claims description 29
- 239000000919 ceramic Substances 0.000 claims abstract description 48
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 230000007246 mechanism Effects 0.000 claims abstract description 30
- 229910000831 Steel Inorganic materials 0.000 claims description 38
- 239000010959 steel Substances 0.000 claims description 38
- 238000001816 cooling Methods 0.000 claims description 11
- 238000005496 tempering Methods 0.000 claims description 7
- 238000010791 quenching Methods 0.000 claims description 6
- 230000000171 quenching effect Effects 0.000 claims description 6
- 230000007704 transition Effects 0.000 claims description 6
- 238000011084 recovery Methods 0.000 claims description 2
- 238000000034 method Methods 0.000 abstract description 28
- 230000008569 process Effects 0.000 abstract description 17
- 239000007788 liquid Substances 0.000 abstract description 12
- 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 5
- 238000005260 corrosion Methods 0.000 description 4
- 230000003028 elevating effect Effects 0.000 description 4
- 238000013329 compounding Methods 0.000 description 3
- 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
- 230000009471 action Effects 0.000 description 2
- 238000009750 centrifugal casting Methods 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
- 239000000758 substrate Substances 0.000 description 2
- 229910000851 Alloy steel Inorganic materials 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
- 238000010586 diagram 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
- 238000002203 pretreatment Methods 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/16—Casting in, on, or around objects which form part of the product for making compound objects cast of two or more different metals, e.g. for making rolls for rolling mills
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0081—Casting in, on, or around objects which form part of the product pretreatment of the insert, e.g. for enhancing the bonding between insert and surrounding cast metal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/62—Quenching devices
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/08—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for tubular bodies or pipes
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Heat Treatment Of Articles (AREA)
Abstract
本发明公开了一种不锈钢/碳钢复合管浇注系统以及生产系统，包括浇注系统、浇注前对基层管进行处理的预处理机构、加热炉、加热系统以及对浇注后的复合管进行热处理的热处理机构；加热系统与气氛保护系统分别通过管道与所述加热炉相连通；该系统结构可靠，自动化程度高，无需大量人工操作，提高了产品稳定性及生产效率；该系统采用固液复合的结构生产不锈钢/碳钢复合管，降低了生产过程对真空度的要求，不锈钢/碳钢界面间通过熔合实现冶金结合，强度足以满足后续热轧生产的需求；且该系统通过设计内、外双层陶瓷模具，简化了采用砂型铸造或消失模铸造进行固液复合时复杂的前置工艺流程，并可适应多种规格、多种成分的生产要求。
The invention discloses a stainless steel/carbon steel composite pipe pouring system and production system, comprising a pouring system, a pretreatment mechanism for treating a base pipe before pouring, a heating furnace, a heating system and a heat treatment for heat treating the poured composite pipe mechanism; the heating system and the atmosphere protection system are respectively connected with the heating furnace through pipes; the system has a reliable structure, a high degree of automation, does not require a lot of manual operations, and improves product stability and production efficiency; the system adopts a solid-liquid composite structure The production of stainless steel/carbon steel composite pipes reduces the requirement for vacuum degree in the production process. The metallurgical bond between the stainless steel/carbon steel interface is achieved by fusion, and the strength is sufficient to meet the needs of subsequent hot rolling production; and the system is designed with inner and outer double layers. The ceramic mold simplifies the complex pre-process process when using sand casting or lost foam casting for solid-liquid composite, and can adapt to the production requirements of various specifications and components.
Description
Technical Field
The invention relates to the field of preparation of bimetal composite materials, in particular to a stainless steel/carbon steel composite pipe pouring system and a 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.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides a stainless steel/carbon steel composite pipe pouring system and a production system.
The technical scheme for solving the technical problems is 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 a preferred embodiment of the present invention, the lifting mechanism includes a driving member and a lifting positioning shaft connected to the driving member, and a lower end of the lifting positioning shaft is connected to the steel container 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 a preferred embodiment of the present invention, a cooling system is disposed at a position corresponding to the ceramic mold at the bottom end of the substrate tube, and the composite layer leaving the ceramic mold is cooled by the cooling system.
Further, in a preferred embodiment of the invention, an atmosphere protection system is arranged below the casting area.
The invention also provides a production system of the stainless steel/carbon steel composite pipe, which comprises the pouring system, a pretreatment mechanism for treating the base pipe before pouring, a heating furnace, a heating system and a heat treatment mechanism for carrying out heat treatment on the poured composite pipe; the heating system and the atmosphere protection system are respectively communicated with the heating furnace through pipelines.
Further, in a 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 treatment portion for medium-temperature tempering the quenched composite pipe.
Further, in the preferred embodiment of the present invention, the base pipe before casting is hoisted and moved to the casting area by the hoisting device, and the composite pipe after casting is hoisted and moved to the heat treatment tank and the tempering treatment part.
The invention has the following beneficial effects: the stainless steel/carbon steel composite pipe casting system and the production system provided by the invention have the advantages that the structure is reliable, the automation degree is high, a large amount of manual operation is not needed, the production flow is smooth, and the product stability and the production efficiency are improved; 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 gating system according to the present invention;
FIG. 2 is a schematic structural view of a ceramic mold according to the present invention;
FIG. 3 is a schematic diagram of a production system according to 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 this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the 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. According to the invention, the ceramic mold is moved while pouring in the pouring process, and the blank shell below the ceramic mold is cooled at the same time, so that the surface quality of the composite layer is obviously improved compared with a solid-liquid combination mode of centrifugal casting under the extrusion action of the ceramic mold, the inner wall of the composite layer is smooth, irregular shapes are avoided, the internal quality of the composite layer can be improved through the extrusion of the ceramic mold, the problems of Susong (shrinkage cavity) and segregation are solved, the binding force between the composite layer and the base layer can be improved, the moving process of the ceramic mold is also a demolding process, when pouring liquid is poured to the top of the base layer pipe, the ceramic mold is moved to the top, and finally the base layer pipe is removed, so that the whole process flow is very smooth and rapid, and the production efficiency is greatly.
In order to improve the usability of the lifting mechanism 6, in the invention, 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 respectively connected with the steel containing barrel 5 and the ceramic mold 4. 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 present invention further provides a system for producing a stainless steel/carbon steel composite tube, comprising a casting system, a pre-treatment mechanism 14 for treating the base tube 2 before casting, a heating furnace 15, a heating system 16, and a heat treatment mechanism 17 for heat-treating the cast composite tube; 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 purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (10)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010045172.6A CN111136247A (en) | 2020-01-16 | 2020-01-16 | A stainless steel/carbon steel composite pipe casting system and production system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202010045172.6A CN111136247A (en) | 2020-01-16 | 2020-01-16 | A stainless steel/carbon steel composite pipe casting system and production system |
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| CN111136247A true CN111136247A (en) | 2020-05-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
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| JP2014151324A (en) * | 2013-02-05 | 2014-08-25 | Sumitomo Electric Ind Ltd | Clad steel wire and method of manufacturing the same |
| CN105328167A (en) * | 2015-10-30 | 2016-02-17 | 东北大学 | DC casting device and method for producing steel/aluminum composite pipe |
| KR20160078784A (en) * | 2014-12-24 | 2016-07-05 | 주식회사 포스코 | Manufacture Method of Clading Pipe and Manufacture Device of Clading Pipe |
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2020
- 2020-01-16 CN CN202010045172.6A patent/CN111136247A/en active Pending
Patent Citations (9)
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| JPH0760431A (en) * | 1993-08-30 | 1995-03-07 | Kubota Corp | Clad pipe manufacturing method |
| CN101073822A (en) * | 2007-06-27 | 2007-11-21 | 西安建筑科技大学 | Method for producing ultrathin and ultralong centrifugal metallurgical composite double-metal pipe |
| CN101125362A (en) * | 2007-10-11 | 2008-02-20 | 丁家伟 | Casting method for manufacturing layered metal composite material technology and equipment |
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| CN105328167A (en) * | 2015-10-30 | 2016-02-17 | 东北大学 | DC casting device and method for producing steel/aluminum composite pipe |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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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