CN103008635A - Melting and casting mold and preparation method thereof - Google Patents
Melting and casting mold and preparation method thereof Download PDFInfo
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- CN103008635A CN103008635A CN2012105909011A CN201210590901A CN103008635A CN 103008635 A CN103008635 A CN 103008635A CN 2012105909011 A CN2012105909011 A CN 2012105909011A CN 201210590901 A CN201210590901 A CN 201210590901A CN 103008635 A CN103008635 A CN 103008635A
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- mould
- bowl
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- stopper
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Abstract
The invention relates to a melting and casting mold and a preparation method thereof, in particular to material components, appearance design and matching of the BFe30-1-1 melting and casting mold (a stopper rod and a bottom bowl), and belongs to the technical field of melting and casting. According to the invention, a material with high fire resisting temperature, high strength and hardness, strong wash resistance, chemical components not conflicting with BFe30-1-1, low product impurity content and better heat conducting performance is selected. Circular arc transition is formed at the combined part of the prepared stopper rod and the prepared bottom bowl; the hardness of the head of the stopper rod is slightly higher than that of the bottom bowl and the stopper rod is in the semicircular form and the bottom bowl is in the form of a circular arc with low center; therefore, the stopper rod and the bottom bowl can be closely combined and can be also used when the bottom bowl is gradually worn off.
Description
Technical field
The present invention relates to a kind of founding with mould and preparation method thereof, be specifically related to a kind of BFe30-1-1 founding with material composition, configuration design and the cooperation of mould (bowl at the bottom of the stopper), belong to the casting technology field.
Background technology
The BFe30-1-1 copper alloy tube is used as important ships condenser pipe because of its good corrosion resistance, this product production difficulty when founding is high, seldom producer can produce qualified product, main cause is to control the copper flow quantity that leads to crystallizer by the stopper of melting burner and the size in bowl gap, the end after copper liquid dissolves, and the material of bowl is graphite at the bottom of the stopper, high because of BFe30-1-1 founding cast temperature in actual production, bowl contacts with high-temperature copper liquid at 15 minutes namely and to melt progressively that cause can't be from main regulation copper flow quantity (stove of casting be generally at 45-70 minute) at the bottom of the stopper, can only rely on the adjustment burner just to come copper liquid liquid level in the crystallization control device during operation, copper liquid is exposed in air, both caused the ingot casting oxygen content high, simultaneously because melting, the carbon of graphite piece in copper liquid, causes " C " amount exceed standard (standard-required C≤0.05%, the content height then affects the service life of material) that contains; There is not above problem in another copper-nickel alloy BFe10-1-1 because casting temperature is low.The present invention overcomes the deficiency that exists in the bowl technology at the bottom of the stopper in the BFe30-1-1 copper alloy founding production process.
Summary of the invention
The objective of the invention is to overcome the deficiencies in the prior art, provide a kind of and can satisfy BFe30-1-1 copper alloy founding mould (bowl at the bottom of the stopper) fully.
According to technical scheme provided by the invention, the founding mould comprises stopper and end bowl; Stopper is made of front end, middle part and tail end, and front end is circular arc; End bowl comprises the rim of a bowl, through hole and the bowl end; The stopper front end cooperates with the rim of a bowl of end bowl; It is characterized in that: the radian of described stopper front end is less than the radian of end bowl the rim of a bowl.
The described founding preparation method of mould, formula rate by weight step is as follows:
(1) prepare: the front cleaning readjusting operations scene of selecting materials of preparing burden keeps no-sundries; Check and clean up the equipment such as mixer, vibrating head; The Inspection water, its water quality must reach drinking water standard;
Size according to designing mould leaves machining allowance, makes template with steel plate and hardwood plate, and the formwork quality should be guaranteed not to be shifted, not spillage;
(2) discharging: get 65 ~ 70 parts of Al
2O
38 ~ 12 parts of MgO
212 ~ 16 parts of SiC, 2 ~ 4 parts curing agent and 4 ~ 6 parts of adhesives add in the agitator, evenly add 4 ~ 6 parts 35 ~ 45 ℃ water, mix with discharging behind JW-250 type forced mixer stirring 8 ~ 12min to obtain castable;
(3) enter mould: get castable that step (2) goes out and in the 30min of discharging, pour in the mould that step (1) prepares, layering ram-jolt, every layer height 190 ~ 210mm can not touch anchoring piece and thermal insulation layer during vibration, must not be in for a long time shake of same position or heavily shake; Treat that the surface returns slurry, after bubble tails off vibrating head is slowly extracted out, avoid product to produce segregation phenomenon and hole occurs;
(4) form removal: product surface sclerosis in step (3) the gained mould, form removal when intensity reaches 70% ~ 75%, maintenance 22 ~ 26h is with 1000W electric light baking 40h, until castable is hardened fully;
(5) processing after: step (4) products obtained therefrom according to the machined of mould drawing requirement size, is namely got product founding mould.
Described adhesive is the PA-80 adhesive.
Described curing agent is the R2256 curing agent.
Grain size proportion is granularity 0.2 ~ 0.5mm during batching, accounts for 23%; Granularity is 0.05 ~ 0.2mm, accounts for 40%; Granularity accounts for 25% less than 0.05mm; Ultramicro-powder accounts for 12%.
The composition proportion of raw material, material, grade height, have with the mold use life-span relation is directly arranged, needs selection refractory temperature is high, intensity hardness is high, antiscour power strong, chemical composition is not conflicted with BFe30-1-1, impurity content is low, have the preferably material of heat conductivility, leading indicator is as shown in table 1.
Table 1 Heat Conduction Material performance
| Project | Index |
| Apparent porosity % | ≤14 |
| Bulk density g/m 3 | ≥2.9 |
| Rupture strength Mpa | ≥14.8 |
| Thermal shock resistance (1100 ℃ of water-cooleds) is inferior | ≥6 |
| Al 2O 3+MgO 2% | ≥58 |
| Al 2O 3+MgO 2+SiC% | ≥88 |
Be the die quality after the assurance processing, also need to adopt many grain compositions to put, adopt the principle of dense packing to carry out all and the configuration of chemical combination reason, adopt simultaneously oxidation resistant Ultramicro-powder to fill the space, through precision-fit, obtain the close large product of body, improve scour resistance and the corrosion resistance of stopper, grain size proportion is as shown in table 2.
Stopper also is the key factor that affects service life with the design of end bowl with cooperating, design of the present invention is adopted in both junctions with arc transition, bowl of a little higher than end of stopper head hardness is simultaneously with the semicircle form, and end bowl adopts the circular arc at low center, both can be combined closely and can also use under end bowl progressively weares and teares
The present invention has following advantage: the present invention selects that refractory temperature is high, intensity hardness is high, antiscour power is strong, chemical composition, does not conflict with BFe30-1-1, and the product impurity content is low, has the preferably material of heat conductivility.With arc transition, bowl of a little higher than end of stopper head hardness is simultaneously with the semicircle form in both junctions for the stopper that makes and end bowl, and end bowl adopts the circular arc at low center, both can be combined closely and can also use under end bowl progressively weares and teares.
Description of drawings
Fig. 1 stopper structural representation of the present invention.
Fig. 2 end of the present invention bowl structure schematic diagram.
The specific embodiment
The invention will be further described below in conjunction with specific embodiment.
The founding mould comprises stopper 1 and end bowl 2; Stopper 1 is made of front end 3, middle part 4 and tail end 5, and front end 3 is circular arc; End bowl 2 comprises the rim of a bowl 6, through hole 7 and the bowl end 8; Stopper 1 front end 3 cooperates with the rim of a bowl 6 of end bowl 2; It is characterized in that: the radian of described stopper 1 front end 3 is less than the radian of end bowl 2 the rims of a bowl 6.
The embodiment 2 foundings preparation method of mould, formula rate by weight step is as follows:
(1) prepare: the front cleaning readjusting operations scene of selecting materials of preparing burden keeps no-sundries; Check and clean up the equipment such as mixer, vibrating head; The Inspection water, its water quality must reach drinking water standard;
Size according to designing mould leaves machining allowance, makes template with steel plate and hardwood plate, and the formwork quality should be guaranteed not to be shifted, not spillage;
(2) discharging: get 65 parts of Al
2O
38 parts of MgO
212 parts of SiC, 2 parts curing agent and 4 parts of adhesives add in the agitator, evenly add 4 parts 35 ~ 45 ℃ water, mix with discharging behind JW-250 type forced mixer stirring 8 ~ 12min to obtain castable;
(3) enter mould: get castable that step (2) goes out and in the 30min of discharging, pour in the mould that step (1) prepares, layering ram-jolt, every layer height 190mm can not touch anchoring piece and thermal insulation layer during vibration, must not be in for a long time shake of same position or heavily shake; Treat that the surface returns slurry, after bubble tails off vibrating head is slowly extracted out, avoid product to produce segregation phenomenon and hole occurs;
(4) form removal: product surface sclerosis in step (3) the gained mould, form removal when intensity reaches 70%, maintenance 22h is with 1000W electric light baking 40h, until castable is hardened fully;
(5) processing after: step (4) products obtained therefrom according to the machined of mould drawing requirement size, is namely got product founding mould.
Described adhesive is the PA-80 adhesive.
Described curing agent is the R2256 curing agent.
The embodiment 3 foundings preparation method of mould, formula rate by weight step is as follows:
(1) prepare: the front cleaning readjusting operations scene of selecting materials of preparing burden keeps no-sundries; Check and clean up the equipment such as mixer, vibrating head; The Inspection water, its water quality must reach drinking water standard;
Size according to designing mould leaves machining allowance, makes template with steel plate and hardwood plate, and the formwork quality should be guaranteed not to be shifted, not spillage;
(2) discharging: get 65 ~ 70 parts of Al
2O
312 parts of MgO
216 parts of SiC, 4 parts curing agent and 6 parts of adhesives add in the agitator, evenly add 6 parts 45 ℃ water, mix with discharging behind the JW-250 type forced mixer stirring 12min to obtain castable;
(3) enter mould: get castable that step (2) goes out and in the 30min of discharging, pour in the mould that step (1) prepares, layering ram-jolt, every layer height 210mm can not touch anchoring piece and thermal insulation layer during vibration, must not be in for a long time shake of same position or heavily shake; Treat that the surface returns slurry, after bubble tails off vibrating head is slowly extracted out, avoid product to produce segregation phenomenon and hole occurs;
(4) form removal: product surface sclerosis in step (3) the gained mould, form removal when intensity reaches 75%, maintenance 26h is with 1000W electric light baking 40h, until castable is hardened fully;
(5) processing after: step (4) products obtained therefrom according to the machined of mould drawing requirement size, is namely got product founding mould.
The embodiment 4 foundings preparation method of mould, formula rate by weight step is as follows:
(1) prepare: the front cleaning readjusting operations scene of selecting materials of preparing burden keeps no-sundries; Check and clean up the equipment such as mixer, vibrating head; The Inspection water, its water quality must reach drinking water standard;
Size according to designing mould leaves machining allowance, makes template with steel plate and hardwood plate, and the formwork quality should be guaranteed not to be shifted, not spillage;
(2) discharging: get 68 parts of Al
2O
310 parts of MgO
214 parts of SiC, 3 parts curing agent and 5 parts of adhesives add in the agitator, evenly add 5 parts 35 ~ 45 ℃ water, mix with discharging behind JW-250 type forced mixer stirring 8 ~ 12min to obtain castable;
(3) enter mould: get castable that step (2) goes out and in the 30min of discharging, pour in the mould that step (1) prepares, layering ram-jolt, every layer height 200mm can not touch anchoring piece and thermal insulation layer during vibration, must not be in for a long time shake of same position or heavily shake; Treat that the surface returns slurry, after bubble tails off vibrating head is slowly extracted out, avoid product to produce segregation phenomenon and hole occurs;
(4) form removal: product surface sclerosis in step (3) the gained mould, form removal when intensity reaches 72%, maintenance 24h is with 1000W electric light baking 40h, until castable is hardened fully;
(5) processing after: step (4) products obtained therefrom according to the machined of mould drawing requirement size, is namely got product founding mould.
Cast under equal other conditions 3 stove BFe30-1-1 " C ", " O " content balance of the stopper of embodiment 2-4 preparation and end bowl and conventional graphite goods are as shown in table 2.
Table 2
Other elements do not change.The product that in following process and use, obviously is better than graphite product by the BFe30-1-1 of bowl casting at the bottom of this product stopper.
Claims (5)
1. the founding mould comprises stopper (1) and end bowl (2); Stopper (1) is made of front end (3), middle part (4) and tail end (5), and front end (3) is circular arc; End bowl (2) comprises the rim of a bowl (6), through hole (7) and the bowl end (8); Stopper (1) front end (3) cooperates with the rim of a bowl (6) of end bowl (2); It is characterized in that: the radian of described stopper (1) front end (3) is less than the radian of end bowl (2) the rim of a bowl (6).
2. founding is with the preparation method of mould as claimed in claim 1, and step is as follows by weight to it is characterized in that formula rate:
(1) prepare: the front cleaning readjusting operations scene of selecting materials of preparing burden keeps no-sundries; Check and clean up the equipment such as mixer, vibrating head; The Inspection water, its water quality must reach drinking water standard;
Size according to designing mould leaves machining allowance, makes template with steel plate and hardwood plate, and the formwork quality should be guaranteed not to be shifted, not spillage;
(2) discharging: get 65 ~ 70 parts of Al
2O
38 ~ 12 parts of MgO
212 ~ 16 parts of SiC, 2 ~ 4 parts curing agent and 4 ~ 6 parts of adhesives add in the agitator, evenly add 4 ~ 6 parts 35 ~ 45 ℃ water, mix with discharging behind JW-250 type forced mixer stirring 8 ~ 12min to obtain castable;
(3) enter mould: get castable that step (2) goes out and in the 30min of discharging, pour in the mould that step (1) prepares, layering ram-jolt, every layer height 190 ~ 210mm can not touch anchoring piece and thermal insulation layer during vibration, must not be in for a long time shake of same position or heavily shake; Treat that the surface returns slurry, after bubble tails off vibrating head is slowly extracted out, avoid product to produce segregation phenomenon and hole occurs;
(4) form removal: product surface sclerosis in step (3) the gained mould, form removal when intensity reaches 70% ~ 75%, maintenance 22 ~ 26h is with 1000W electric light baking 40h, until castable is hardened fully;
(5) processing after: step (4) products obtained therefrom according to the machined of mould drawing requirement size, is namely got product founding mould.
3. founding is with the preparation method of mould as claimed in claim 1, and it is characterized in that: described adhesive is the PA-80 adhesive.
4. founding is with the preparation method of mould as claimed in claim 1, and it is characterized in that: described curing agent is the R2256 curing agent.
5. founding is with the preparation method of mould as claimed in claim 1, and it is characterized in that: grain size proportion is granularity 0.2 ~ 0.5mm during batching, accounts for 23%; Granularity is 0.05 ~ 0.2mm, accounts for 40%; Granularity accounts for 25% less than 0.05mm; Ultramicro-powder accounts for 12%.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210590901.1A CN103008635B (en) | 2012-12-31 | 2012-12-31 | Melting and casting mold and preparation method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210590901.1A CN103008635B (en) | 2012-12-31 | 2012-12-31 | Melting and casting mold and preparation method thereof |
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| Publication Number | Publication Date |
|---|---|
| CN103008635A true CN103008635A (en) | 2013-04-03 |
| CN103008635B CN103008635B (en) | 2015-04-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210590901.1A Active CN103008635B (en) | 2012-12-31 | 2012-12-31 | Melting and casting mold and preparation method thereof |
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Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1112819A (en) * | 1964-12-03 | 1968-05-08 | United Steel Companies Ltd | Nozzle and stopper assemblies for the teeming of liquid metal |
| JPS6335462A (en) * | 1985-12-11 | 1988-02-16 | 川崎炉材株式会社 | Castable refractories and manufacture |
| JPH08294759A (en) * | 1995-04-24 | 1996-11-12 | Akechi Ceramics Kk | Nozzle for continuous casting |
| CN2323335Y (en) * | 1996-12-27 | 1999-06-09 | 克里斯蒂安·莱特 | discharging mechanism of melting crucible |
| CN201020533Y (en) * | 2007-03-22 | 2008-02-13 | 济南麦哈勃冶金技术开发有限公司 | Stopper type fixed diameter nozzle quick-changing casting device |
| CN101497126A (en) * | 2009-02-20 | 2009-08-05 | 山东中齐耐火材料集团有限公司 | Multi-curve flow-control integral stopper and production method |
| CN102603339A (en) * | 2012-03-31 | 2012-07-25 | 芜湖县天海耐火炉料有限公司 | Fireproof castable and preparation method thereof |
| CN203061852U (en) * | 2012-12-31 | 2013-07-17 | 无锡隆达金属材料有限公司 | Mold for casting |
-
2012
- 2012-12-31 CN CN201210590901.1A patent/CN103008635B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1112819A (en) * | 1964-12-03 | 1968-05-08 | United Steel Companies Ltd | Nozzle and stopper assemblies for the teeming of liquid metal |
| JPS6335462A (en) * | 1985-12-11 | 1988-02-16 | 川崎炉材株式会社 | Castable refractories and manufacture |
| JPH08294759A (en) * | 1995-04-24 | 1996-11-12 | Akechi Ceramics Kk | Nozzle for continuous casting |
| CN2323335Y (en) * | 1996-12-27 | 1999-06-09 | 克里斯蒂安·莱特 | discharging mechanism of melting crucible |
| CN201020533Y (en) * | 2007-03-22 | 2008-02-13 | 济南麦哈勃冶金技术开发有限公司 | Stopper type fixed diameter nozzle quick-changing casting device |
| CN101497126A (en) * | 2009-02-20 | 2009-08-05 | 山东中齐耐火材料集团有限公司 | Multi-curve flow-control integral stopper and production method |
| CN102603339A (en) * | 2012-03-31 | 2012-07-25 | 芜湖县天海耐火炉料有限公司 | Fireproof castable and preparation method thereof |
| CN203061852U (en) * | 2012-12-31 | 2013-07-17 | 无锡隆达金属材料有限公司 | Mold for casting |
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| Publication number | Publication date |
|---|---|
| CN103008635B (en) | 2015-04-29 |
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Address after: 214105 No.18 Xiangyun Road, anzhen street, Xishan District, Wuxi City, Jiangsu Province Patentee after: Jiangsu Longda Super Alloy Co.,Ltd. Address before: 214105 An Zhen Gao E Cun, Xishan District, Wuxi City, Jiangsu Province Patentee before: WUXI LONGDA METAL MATERIALS Co.,Ltd. |