CN105499529A - Furnace tube columnar crystal texture forming method and temperature control device - Google Patents
Furnace tube columnar crystal texture forming method and temperature control device Download PDFInfo
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- CN105499529A CN105499529A CN201510920659.3A CN201510920659A CN105499529A CN 105499529 A CN105499529 A CN 105499529A CN 201510920659 A CN201510920659 A CN 201510920659A CN 105499529 A CN105499529 A CN 105499529A
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- natural gas
- cooling water
- centrifugal casting
- branch pipe
- tube
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D13/00—Centrifugal casting; Casting by using centrifugal force
- B22D13/12—Controlling, supervising, specially adapted to centrifugal casting, e.g. for safety reasons
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- Mechanical Engineering (AREA)
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Abstract
The invention discloses a furnace tube columnar crystal texture forming method and a temperature control device. The furnace tube columnar crystal texture forming method adopts a centrifugal casting and pouring process, and comprises the following steps: firstly, heating a centrifugal casting barrel; preserving the heat after reaching a preset temperature; and injecting casting molten steel into the centrifugal casting barrel; and ensuring temperature gradient between the casting molten steel and the centrifugal casting barrel in the whole centrifugal casting process by virtue of a temperature control device, thereby obtaining a furnace tube with a required columnar crystal texture proportion. A heating system and a cooling system below the centrifugal casting barrel can ensure the temperature gradient between the casting molten and the centrifugal casting barrel during production of a centrifugal casting tube section, so that the proportion of the columnar crystal texture of the centrifugal casting furnace is ensured.
Description
Technical field
The invention belongs to high-temperature alloy material preparing technical field, be specifically related to a kind of petrochemical industry boiler tube column crystal metallographic structure formation method and temperature control equipment.
Background technology
Ethylene cracking tube in petroleum chemical industry or HK-40 Tube at Hydrogen Reformer are all operated in about 1000 DEG C, and the work period is 8-10, so generally all have requirement to columanar structure's proportion.Boiler tube crystalline structure outermost layer is very thin thin crystal layer, is then columanar structure, and this tissue, owing to successively growing, has higher anti-oxidant, decay resistance.Such as, so user requires that columanar structure is within the scope of certain proportion, requires 60-80%.Columanar structure's growth depends primarily on the difference of the liquid steel temperature of cast and the thermograde of cast type tube.Therefore, the ratio difficulty that accurately will control boiler tube columanar structure is very large.
Summary of the invention
In order to overcome the above-mentioned defect that prior art field exists, the object of the invention is to, a kind of boiler tube columanar structure's formation method and temperature control equipment are provided, control petrochemical industry heat-resisting alloy boiler tube columanar structure ratio.
Boiler tube columanar structure provided by the invention formation method, adopt centrifugal casting pouring technology, first centrifugal casting moulded barrel is heated, be incubated after reaching predetermined temperature, molten steel will be cast and inject centrifugal casting moulded barrel, guaranteed the thermograde of casting in whole centrifugal casting process between molten steel and centrifugal casting moulded barrel by temperature control equipment, thus obtain the boiler tube of required columanar structure ratio.
A kind of temperature control equipment of boiler tube columanar structure of preparing for the production of such as said method, it is arranged on below centrifugal casting moulded barrel, it comprises heating system, cooling system, control system, described heating system comprises gas pressure table, natural gas main pipeline, natural gas film pressure regulator valve, natural gas electric-control stop valve, natural gas branch pipe road, natural gas branch pipe road pipe clamp, natural gas end pipeline, natural gas electronic lighter, natural gas film pressure regulator valve and natural gas electric-control stop valve is provided with between natural gas main pipeline and natural gas branch pipe road, natural gas branch pipe road pipe clamp is provided with between natural gas branch pipe road and natural gas end pipeline, natural gas end duct end is provided with natural gas electronic lighter, natural gas main pipeline is provided with gas pressure table, described cooling system comprises cooling water main pipeline, cooling water hand stop valve, cooling water electric-control stop valve, cooling water branch pipe(tube), cooling water end pipeline, cooling water atomizer, cooling water hand stop valve and cooling water electric-control stop valve is provided with between cooling water main pipeline and cooling water branch pipe(tube), cooling water end duct end is provided with cooling water atomizer, type tube temperature is measured by type tube temperature measuring equipment, the technological parameter Real-time Feedbacks such as the switch of type tube temperature, valve to control system, and carry out real-time online control.
Boiler tube columanar structure's formation method provided by the invention and temperature control equipment, its beneficial effect is, when heating system below centrifugal casting moulded barrel and cooling system can guarantee that centrifugal casting pipeline section is produced, thermograde between casting molten steel and centrifugal casting moulded barrel, thus guarantee the ratio of the columanar structure of centrifugal casting furnace tube.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of temperature control equipment of the present invention;
Fig. 2 is that the A-A of Fig. 1 is to structural representation;
Fig. 3 is the working state figure of boiler tube centrifugal casting equipment.
Mark in figure:
1. natural gas electronic lighter; 2. type tube temperature measuring equipment; 3. cooling water hand stop valve; 4. cooling water electric-control stop valve; 5. cooling water main pipeline; 6. cooling water branch pipe(tube); 7. natural gas branch pipe road pipe clamp; 8. gas pressure table; 9. natural gas main pipeline; 10. natural gas film pressure regulator valve; 11. natural gas electric-control stop valves; 12. natural gas branch pipe roads; 13. cooling water end pipelines; 14. natural gas end pipelines; 15. bracing frames; 16. cooling water atomizers; 17. centrifugal casting moulded barrels.
Detailed description of the invention
With reference to the accompanying drawings, in conjunction with an embodiment, boiler tube columanar structure's formation method provided by the invention and temperature control equipment are described in detail.
With reference to Fig. 1-Fig. 3, temperature control equipment is arranged on below centrifugal casting moulded barrel 17, it comprises heating system, cooling system, control system, described heating system comprises gas pressure table 8, natural gas main pipeline 9, natural gas film pressure regulator valve 10, natural gas electric-control stop valve 11, natural gas branch pipe road 12, natural gas branch pipe road pipe clamp 7, natural gas end pipeline 14, natural gas electronic lighter 1, natural gas film pressure regulator valve 10 and natural gas electric-control stop valve 11 is provided with between natural gas main pipeline 9 and natural gas branch pipe road 12, natural gas branch pipe road pipe clamp 7 is provided with between natural gas branch pipe road 12 and natural gas end pipeline 14, natural gas end pipeline 14 terminal is provided with natural gas electronic lighter 1, natural gas main pipeline 9 is provided with gas pressure table 8, described cooling system comprises cooling water main pipeline 5, cooling water hand stop valve 3, cooling water electric-control stop valve 4, cooling water branch pipe(tube) 6, cooling water end pipeline 13, cooling water atomizer 16, cooling water hand stop valve 3 and cooling water electric-control stop valve 4 is provided with between cooling water main pipeline 5 and cooling water branch pipe(tube) 6, cooling water end pipeline 13 terminal is provided with cooling water atomizer 16, type tube temperature is measured by type tube temperature measuring equipment 2, type tube temperature, the technological parameter Real-time Feedbacks such as the switch of valve are to control system, and carry out real-time online control, natural gas end pipeline 14 and cooling water end pipeline 13 are arranged on below centrifugal casting moulded barrel 17 by bracing frame 15.
Boiler tube columanar structure of the present invention formation method, adopt centrifugal casting pouring technology, first centrifugal casting moulded barrel 17 is heated, be incubated after reaching predetermined temperature, molten steel will be cast and inject centrifugal casting moulded barrel 17, guaranteed the thermograde of casting in whole centrifugal casting process between molten steel and centrifugal casting moulded barrel 17 by temperature control equipment, thus obtain the boiler tube of required columanar structure ratio.
When starting to produce every day, the centrifugal casting moulded barrel 17 of cast can be placed in drying kiln and heat, and being incubated, being transferred on centrifugal casting machine and pouring into a mould before cast when reaching requirement temperature.Casting molten steel has individual thermograde with the front type tube temperature of cast according to setting value, pours into a mould centrifugal casting furnace tube, columanar structure can be made to reach more than 60-80% under this thermograde.If the temperature of centrifugal casting moulded barrel 17 is bound to rise during continuous pouring, in order to there is certain thermograde when ensureing cast, the cooling system below centrifugal casting moulded barrel 17 can be adopted to cool, if weather temperature is lower when producing, it is very fast that cast moulding leads to that temperature falls, also the flame heating system below centrifugal casting moulded barrel 17 can be adopted to heat, during to guarantee that centrifugal casting pipeline section is produced, thermograde between casting molten steel and centrifugal casting moulded barrel 17, thus guarantee the ratio of the columanar structure of centrifugal casting furnace tube.
Embodiment
The ethylene cracking tube of boiler tube external diameter 73 ㎜, internal diameter 59 ㎜, monolateral thickness 7 ㎜, monolateral processing capacity 4 ㎜.
ZG40Cr35Ni45Nb alloy adopts centrifugal casting technique, and its chemical composition is: C:0.40%-0.48%; Si:1.20%-2.00%; Mn:1.0%-2.0%; P≤0.03%; S≤0.03%; Cr:33.0%-36.0%; Ni:43.0%-46.0%; Nb:0.8%-1.5%.Casting the ethylene cracking tube that molten steel pouring temperature is 1580 DEG C-1600 DEG C, type tube cast head temperature is 240 DEG C-290 DEG C, type tube cast tail end temperature is 270 DEG C-320 DEG C, type tube rotating speed prepares boiler tube external diameter 73 ㎜, internal diameter 59 ㎜, monolateral thickness 7 ㎜, monolateral processing capacity 4 ㎜ under being the process program of 2200rpm, the columanar structure of prepared boiler tube is between 60%-80%.
Claims (2)
1. a boiler tube columanar structure formation method, adopt centrifugal casting pouring technology, it is characterized in that: first centrifugal casting moulded barrel is heated, be incubated after reaching predetermined temperature, molten steel will be cast and inject centrifugal casting moulded barrel, guaranteed the thermograde of casting in whole centrifugal casting process between molten steel and centrifugal casting moulded barrel by temperature control equipment, thus obtain the boiler tube of required columanar structure ratio.
2. the temperature control equipment for the production of boiler tube columanar structure as claimed in claim 1, it is arranged on below centrifugal casting moulded barrel, it is characterized in that: it comprises heating system, cooling system, control system, described heating system comprises gas pressure table, natural gas main pipeline, natural gas film pressure regulator valve, natural gas electric-control stop valve, natural gas branch pipe road, natural gas branch pipe road pipe clamp, natural gas end pipeline, natural gas electronic lighter, natural gas film pressure regulator valve and natural gas electric-control stop valve is provided with between natural gas main pipeline and natural gas branch pipe road, natural gas branch pipe road pipe clamp is provided with between natural gas branch pipe road and natural gas end pipeline, natural gas end duct end is provided with natural gas electronic lighter, natural gas main pipeline is provided with gas pressure table, described cooling system comprises cooling water main pipeline, cooling water hand stop valve, cooling water electric-control stop valve, cooling water branch pipe(tube), cooling water end pipeline, cooling water atomizer, cooling water hand stop valve and cooling water electric-control stop valve is provided with between cooling water main pipeline and cooling water branch pipe(tube), cooling water end duct end is provided with cooling water atomizer, type tube temperature is measured by type tube temperature measuring equipment, the technological parameter Real-time Feedbacks such as the switch of type tube temperature, valve to control system, and carry out real-time online control.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510920659.3A CN105499529A (en) | 2015-12-14 | 2015-12-14 | Furnace tube columnar crystal texture forming method and temperature control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510920659.3A CN105499529A (en) | 2015-12-14 | 2015-12-14 | Furnace tube columnar crystal texture forming method and temperature control device |
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| CN105499529A true CN105499529A (en) | 2016-04-20 |
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| CN201510920659.3A Pending CN105499529A (en) | 2015-12-14 | 2015-12-14 | Furnace tube columnar crystal texture forming method and temperature control device |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6316843A (en) * | 1986-07-07 | 1988-01-23 | Kobe Steel Ltd | Production of centrifugal casting pipe |
| JP2001150114A (en) * | 1999-12-02 | 2001-06-05 | Kubota Corp | Metallic mold for centrifugal casting |
| CN2476372Y (en) * | 2001-04-27 | 2002-02-13 | 大连万通工业装备有限公司 | Water-cooled metal type centrifugal tube casting machine |
| JP2003285149A (en) * | 2002-03-25 | 2003-10-07 | Kurimoto Ltd | Method for producing uniform pipe joint of iron based shape-memory alloy |
| CN1891843A (en) * | 2005-07-07 | 2007-01-10 | 株式会社日立制作所 | Pipe for steam turbine, manufacturing process of same, and steam turbine power plant using those pipes |
| CN101530897A (en) * | 2008-07-24 | 2009-09-16 | 新兴铸管股份有限公司 | Bimetal clad pipe blank with transition layer and production method and production device thereof |
| CN103335956A (en) * | 2013-06-21 | 2013-10-02 | 合肥通用机械研究院 | Quality evaluation method of centrifugal casting alloy furnace tube |
| CN103409665A (en) * | 2013-07-02 | 2013-11-27 | 青岛新力通工业有限责任公司 | Chromium-nickel alloy high-temperature dusting corrosion resistance furnace tube and centrifugal casting production method thereof |
-
2015
- 2015-12-14 CN CN201510920659.3A patent/CN105499529A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6316843A (en) * | 1986-07-07 | 1988-01-23 | Kobe Steel Ltd | Production of centrifugal casting pipe |
| JP2001150114A (en) * | 1999-12-02 | 2001-06-05 | Kubota Corp | Metallic mold for centrifugal casting |
| CN2476372Y (en) * | 2001-04-27 | 2002-02-13 | 大连万通工业装备有限公司 | Water-cooled metal type centrifugal tube casting machine |
| JP2003285149A (en) * | 2002-03-25 | 2003-10-07 | Kurimoto Ltd | Method for producing uniform pipe joint of iron based shape-memory alloy |
| CN1891843A (en) * | 2005-07-07 | 2007-01-10 | 株式会社日立制作所 | Pipe for steam turbine, manufacturing process of same, and steam turbine power plant using those pipes |
| CN101530897A (en) * | 2008-07-24 | 2009-09-16 | 新兴铸管股份有限公司 | Bimetal clad pipe blank with transition layer and production method and production device thereof |
| CN103335956A (en) * | 2013-06-21 | 2013-10-02 | 合肥通用机械研究院 | Quality evaluation method of centrifugal casting alloy furnace tube |
| CN103409665A (en) * | 2013-07-02 | 2013-11-27 | 青岛新力通工业有限责任公司 | Chromium-nickel alloy high-temperature dusting corrosion resistance furnace tube and centrifugal casting production method thereof |
Non-Patent Citations (1)
| Title |
|---|
| 沈红杰: "制氢转化炉管结构与质量控制", 《炼厂制氢、废氢回收与氢气管理学术交流会论文集》 * |
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