CN107243603A - A kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture method - Google Patents
A kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture method Download PDFInfo
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- CN107243603A CN107243603A CN201710478482.5A CN201710478482A CN107243603A CN 107243603 A CN107243603 A CN 107243603A CN 201710478482 A CN201710478482 A CN 201710478482A CN 107243603 A CN107243603 A CN 107243603A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
- B22C9/043—Removing the consumable pattern
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- 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
- C21D1/18—Hardening; Quenching with or without subsequent tempering
-
- 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
- C21D9/0068—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for particular articles not mentioned below
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
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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)
- Earth Drilling (AREA)
Abstract
The invention discloses a kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture method, it is characterised in that comprises the following steps：1) prepared by shell：It is prepared by a, wax-pattern；B, wax-pattern are stained with slurry, shell processed；C, dewaxing；D, Baking；2) melting：Furnace charge is first loaded into electric furnace, after furnace charge is all melting down, liquid level is covered with deslagging agent, and controls liquid steel temperature between 1,540 1580 DEG C, is sampled after alloy is melting down, temperature is maintained between 1,560 1600 DEG C；Power failure is skimmed, and is added deslagging agent and is covered and be warming up to tapping temperature, hangs ladle, treat that ladle is hung to before electric furnace, is tapped after being removed the gred completely in electric furnace, is obtained molten steel；3) pour into a mould：Diffusing, cutout should be prevented during cast；4) sand removal, gas cutting；Heat treatment；6) finishing：The defect of casting first is removed with gas cutting or plasma mode, then root more than removal casting head of casting of polishing.Offshore oil and gas drilling and producing platform casing thin-section casting manufacture method in the present invention has the advantages that Forming Quality is good, production efficiency is high.
Description
Technical field
The present invention relates to casting technology field, more particularly to a kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture
Method.
Background technology
It is well known that the offshore oil and gas production technique of China is more and more ripe, at present, offshore oil and gas exploitation it is main according to
Support oil gas drilling and producing platform is implemented, and offshore oil and gas drilling and producing platform casing is as one of building block of oil gas drilling and producing platform, its
Effect is particularly important.Offshore oil and gas drilling and producing platform casing thin-section casting has main body wall thickness small, and casting section thickness gap is big, Fang Men,
The features such as boss is more, because its planform is complicated, casting dimension requirement is strict, so as to cause the shaping of such casting pouring tired
Difficulty, existing production technology yield rate is low, production efficiency is not high and Forming Quality is poor.
The content of the invention
It is an object of the invention to provide a kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture method, it can be effective
Solve the technical problem being previously mentioned in background technology.
To achieve the above object, the present invention provides following technical scheme：
A kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture method, it comprises the following steps：
1) prepared by shell：
Prepared by a, wax-pattern, first prepare the wax-pattern with urea core, the clear water that temperature is not higher than 26 DEG C is put it into afterwards
In, allow urea core voluntarily to dissolve, obtain wax-pattern；
B, wax-pattern are stained with slurry, shell processed；By ratio of weight and the number of copies 1:1.2:1.35 take Ludox, JFC, white alundum powder, add afterwards
Agitator prepares slurry, pulls particle debris in slurry out with steel wire, adds a small amount of n-octyl alcohol, after stirring 10 minutes, by wax-pattern
Inclination is slowly immersed in slurry, and repeats to infiltrate up and down；
C, dewaxing；Injection running water or hot water into dewaxing groove, add the ammonium chloride for accounting for water proportion 3.5-5%, side edged
Stirring, opens dewaxing groove cap relief valve, and dewaxing liquid should rise to maximum temperature or fluidized state, and wax-pattern obtains formwork after entering groove, dewaxing；
D, Baking；Formwork is transported to roasting place, sintering temperature：930 DEG C -1020 DEG C, roasting time：90-360
Minute, obtain shell；
2) melting：Furnace charge is first loaded into electric furnace, after furnace charge is all melting down, liquid level is covered with deslagging agent, and control steel
Coolant-temperature gage is sampled, temperature is maintained between 1560-1600 DEG C between 1540-1580 DEG C after alloy is melting down；Power failure is skimmed, then
Add deslagging agent to cover and be warming up to tapping temperature, hang ladle, treat that ladle is hung to before electric furnace, tapped after being removed the gred completely in electric furnace,
Obtain molten steel；
3) pour into a mould：Diffusing, cutout should be prevented during cast, beam, emphasis thread are gradually reduced after being poured at rising head 2/3
Feeding, molten steel does not allow to overflow rising head, and coverture is added after at pouring molten steel to rising head 2/3, pours into a mould mid-term sampling analysis, cast
Coupon；
4) sand removal, gas cutting：After casting pouring, through cooling, shelled with shake shell machine, shake shell machine air pressure is 5kg, dead head
Using oxyacetylene gas cutting；
5) it is heat-treated：900-950 DEG C of hardening heat, 680-740 DEG C of temperature, the dispersed stall with goods spread out on the ground for sale of thin-wall part is opened in sand
It is blowed or misting cooling on the ground, then casting is upright, edge-on or prostration is overlayed in charging basket or charging tray, then forged in shove charge
Burn, fire box temperature is less than 500 DEG C；
6) finishing：The defect of casting first is removed with gas cutting or plasma mode, then root more than removal casting head of casting of polishing, obtain
To offshore oil and gas drilling and producing platform casing thin-section casting finished product.
It is preferred that, hardening heat is 930 DEG C, 720 DEG C of temperature in heat treatment.
Compared with prior art, the beneficial effects of the invention are as follows：
Offshore oil and gas drilling and producing platform casing thin-section casting in the present invention is prepared according to shell, melting, cast, sand removal, gas
Cut, be heat-treated and finishing procedure is prepared into finished product, the preparation method is applied to that main body wall thickness is small, and casting section thickness gap is big, side
Door, the casting more than boss, and can be so that offshore oil and gas drilling and producing platform casing has the advantages that Forming Quality is good, production efficiency is high.
Embodiment
The technical scheme in the embodiment of the present invention will be clearly and completely described below, it is clear that described implementation
Example only a part of embodiment of the invention, rather than whole embodiments.Based on the embodiment in the present invention, this area is common
The every other embodiment that technical staff is obtained under the premise of creative work is not made, belongs to the model that the present invention is protected
Enclose.
Embodiment one
A kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture method, it comprises the following steps：
1) prepared by shell：Prepared by a, wax-pattern, first prepare the wax-pattern with urea core, temperature is put it into afterwards and is not higher than
In 26 DEG C of clear water, allow urea core voluntarily to dissolve, obtain wax-pattern；B, wax-pattern are stained with slurry, shell processed；By ratio of weight and the number of copies 1:1.2:
1.35 measure Ludox, JFC, white alundum powder, and agitator is added afterwards and prepares slurry, particle in slurry is pulled out with steel wire miscellaneous
Thing, adds a small amount of n-octyl alcohol, after stirring 10 minutes, and wax-pattern is tilted and is slowly immersed in slurry, and repeats to infiltrate up and down；It is c, de-
Wax；Injection running water or hot water into dewaxing groove, add the ammonium chloride for accounting for water proportion 3.5-5%, stirring while adding, open dewaxing
Groove cap relief valve, dewaxing liquid should rise to maximum temperature or fluidized state, and wax-pattern obtains formwork after entering groove, dewaxing；D, Baking；Will
Formwork is transported to roasting place, sintering temperature：930 DEG C -1020 DEG C, roasting time：90-360 minutes, obtain shell；
2) melting：Furnace charge is first loaded into electric furnace, after furnace charge is all melting down, liquid level is covered with deslagging agent, and control steel
Coolant-temperature gage is sampled, temperature is maintained between 1560-1600 DEG C between 1540-1580 DEG C after alloy is melting down；Power failure is skimmed, then
Add deslagging agent to cover and be warming up to tapping temperature, hang ladle, treat that ladle is hung to before electric furnace, tapped after being removed the gred completely in electric furnace,
Obtain molten steel；
3) pour into a mould：Diffusing, cutout should be prevented during cast, beam, emphasis thread are gradually reduced after being poured at rising head 2/3
Feeding, molten steel does not allow to overflow rising head, and coverture is added after at pouring molten steel to rising head 2/3, pours into a mould mid-term sampling analysis, cast
Coupon；
4) sand removal, gas cutting：After casting pouring, through cooling, shelled with shake shell machine, shake shell machine air pressure is 5kg, dead head
Using oxyacetylene gas cutting；
5) it is heat-treated：900-950 DEG C of hardening heat, 680-740 DEG C of temperature, the dispersed stall with goods spread out on the ground for sale of thin-wall part is opened in sand
It is blowed or misting cooling on the ground, then casting is upright, edge-on or prostration is overlayed in charging basket or charging tray, then forged in shove charge
Burn, fire box temperature is less than 500 DEG C；
6) finishing：The defect of casting first is removed with gas cutting or plasma mode, then root more than removal casting head of casting of polishing, obtain
To offshore oil and gas drilling and producing platform casing thin-section casting finished product.
Embodiment two
A kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture method, it comprises the following steps：
1) prepared by shell：Prepared by a, wax-pattern, first prepare the wax-pattern with urea core, temperature is put it into afterwards and is not higher than
In 26 DEG C of clear water, allow urea core voluntarily to dissolve, obtain wax-pattern；B, wax-pattern are stained with slurry, shell processed；By ratio of weight and the number of copies 1:1.2:
1.35 measure Ludox, JFC, white alundum powder, and agitator is added afterwards and prepares slurry, particle in slurry is pulled out with steel wire miscellaneous
Thing, adds a small amount of n-octyl alcohol, after stirring 10 minutes, and wax-pattern is tilted and is slowly immersed in slurry, and repeats to infiltrate up and down；It is c, de-
Wax；Injection running water or hot water into dewaxing groove, add the ammonium chloride for accounting for water proportion 3.5%, stirring while adding, open dewaxing groove
Cap relief valve, dewaxing liquid should rise to maximum temperature or fluidized state, and wax-pattern obtains formwork after entering groove, dewaxing；D, Baking；By mould
Shell is transported to roasting place, sintering temperature：1000 DEG C, roasting time：90-360 minutes, obtain shell；
2) melting：Furnace charge is first loaded into electric furnace, after furnace charge is all melting down, liquid level is covered with deslagging agent, and control steel
Coolant-temperature gage is sampled, temperature is maintained between 1560-1600 DEG C between 1540-1580 DEG C after alloy is melting down；Power failure is skimmed, then
Add deslagging agent to cover and be warming up to tapping temperature, hang ladle, treat that ladle is hung to before electric furnace, tapped after being removed the gred completely in electric furnace,
Obtain molten steel；
3) pour into a mould：Diffusing, cutout should be prevented during cast, beam, emphasis thread are gradually reduced after being poured at rising head 2/3
Feeding, molten steel does not allow to overflow rising head, and coverture is added after at pouring molten steel to rising head 2/3, pours into a mould mid-term sampling analysis, cast
Coupon；
4) sand removal, gas cutting：After casting pouring, through cooling, shelled with shake shell machine, shake shell machine air pressure is 5kg, dead head
Using oxyacetylene gas cutting；
5) it is heat-treated：930 DEG C of hardening heat, 720 DEG C of temperature, the dispersed stall with goods spread out on the ground for sale of thin-wall part is opened on sandy ground and carried out
Blowing or misting cooling, then casting is upright, edge-on or prostration is overlayed in charging basket or charging tray, then calcined in shove charge, burner hearth temperature
Degree is less than 500 DEG C；
6) finishing：The defect of casting first is removed with gas cutting or plasma mode, then root more than removal casting head of casting of polishing, obtain
To offshore oil and gas drilling and producing platform casing thin-section casting finished product.
Above content is only to structure example of the present invention and explanation, affiliated those skilled in the art couple
Described specific embodiment is made various modifications or supplement or substituted using similar mode, without departing from invention
Structure surmounts scope defined in the claims, all should belong to protection scope of the present invention.
Claims (2)
1. a kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture method, it is characterised in that comprise the following steps：
1) prepared by shell：
Prepared by a, wax-pattern, first prepare the wax-pattern with urea core, temperature is put it into afterwards and is not higher than in 26 DEG C of clear water, is allowed
Urea core voluntarily dissolves, and obtains wax-pattern；
B, wax-pattern are stained with slurry, shell processed；By ratio of weight and the number of copies 1:1.2:1.35 measure Ludox, JFC, white alundum powder, add stir afterwards
Mix bucket and prepare slurry, pull particle debris in slurry out with steel wire, add a small amount of n-octyl alcohol, after stirring 10 minutes, wax-pattern is inclined
Tiltedly it is slowly immersed in slurry, and repeats to infiltrate up and down；
C, dewaxing；Injection running water or hot water into dewaxing groove, add the ammonium chloride for accounting for water proportion 3.5-5%, stirring while adding,
Dewaxing groove cap relief valve is opened, dewaxing liquid should rise to maximum temperature or fluidized state, and wax-pattern obtains formwork after entering groove, dewaxing；
D, Baking；Formwork is transported to roasting place, sintering temperature：930 DEG C -1020 DEG C, roasting time：90-360 points
Clock, obtains shell；
2) melting：Furnace charge is first loaded into electric furnace, after furnace charge is all melting down, liquid level is covered with deslagging agent, and control molten steel temperature
Degree is sampled, temperature is maintained between 1560-1600 DEG C between 1540-1580 DEG C after alloy is melting down；Power failure is skimmed, and is added
Deslagging agent covers and is warming up to tapping temperature, hangs ladle, treats that ladle is hung to before electric furnace, taps, obtains after being removed the gred completely in electric furnace
Molten steel；
3) pour into a mould：Diffusing, cutout should be prevented during cast, beam is gradually reduced after being poured at rising head 2/3, emphasis is mended with thread
Contracting, molten steel does not allow to overflow rising head, and coverture is added after at pouring molten steel to rising head 2/3, pours into a mould mid-term sampling analysis, cast examination
Rod；
4) sand removal, gas cutting：After casting pouring, through cooling, shelled with shake shell machine, shake shell machine air pressure is 5kg, dead head is used
Oxyacetylene gas cutting；
5) it is heat-treated：900-950 DEG C of hardening heat, 680-740 DEG C of temperature, the dispersed stall with goods spread out on the ground for sale of thin-wall part is opened on sandy ground
It is blowed or misting cooling, then casting is upright, edge-on or prostration is overlayed in charging basket or charging tray, then calcined in shove charge, stove
Bore temperature is less than 500 DEG C；
6) finishing：The defect of casting first is removed with gas cutting or plasma mode, then root more than removal casting head of casting of polishing, obtain sea
The pneumatic drill that oils adopts platform casing thin-section casting finished product.
2. a kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture method according to claim 1, it is characterised in that：
Hardening heat is 930 DEG C, 720 DEG C of temperature in heat treatment.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710478482.5A CN107243603A (en) | 2017-06-22 | 2017-06-22 | A kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture method |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710478482.5A CN107243603A (en) | 2017-06-22 | 2017-06-22 | A kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture method |
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| CN107243603A true CN107243603A (en) | 2017-10-13 |
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| CN201710478482.5A Pending CN107243603A (en) | 2017-06-22 | 2017-06-22 | A kind of offshore oil and gas drilling and producing platform casing thin-section casting manufacture method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107838378A (en) * | 2017-11-24 | 2018-03-27 | 江苏华立控制阀有限公司 | A kind of shell melting casting process processed applied to control valve |
| CN109175232A (en) * | 2018-11-23 | 2019-01-11 | 安徽应流铸业有限公司 | A kind of thin-walled pressure-bearing casting lost wax casting technique |
| CN111112549A (en) * | 2019-02-19 | 2020-05-08 | 大成（常熟）机械有限公司 | Precision casting production process of flow divider and flow divider |
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| JPH0237937A (en) * | 1988-07-28 | 1990-02-07 | Kobe Steel Ltd | Precision casting method for casting having narrow mouth hollow part |
| US4921038A (en) * | 1988-05-20 | 1990-05-01 | Nobuyoshi Sasaki | Process for preparing mold for investment casting |
| CN102717032A (en) * | 2012-07-09 | 2012-10-10 | 江苏多为泵业股份有限公司 | Precision casting method for automobile turbocharger casing part |
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2017
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107838378A (en) * | 2017-11-24 | 2018-03-27 | 江苏华立控制阀有限公司 | A kind of shell melting casting process processed applied to control valve |
| CN109175232A (en) * | 2018-11-23 | 2019-01-11 | 安徽应流铸业有限公司 | A kind of thin-walled pressure-bearing casting lost wax casting technique |
| CN111112549A (en) * | 2019-02-19 | 2020-05-08 | 大成（常熟）机械有限公司 | Precision casting production process of flow divider and flow divider |
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