CN103008635B - Melting and casting mold and preparation method thereof - Google Patents
Melting and casting mold and preparation method thereof Download PDFInfo
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- CN103008635B CN103008635B CN201210590901.1A CN201210590901A CN103008635B CN 103008635 B CN103008635 B CN 103008635B CN 201210590901 A CN201210590901 A CN 201210590901A CN 103008635 B CN103008635 B CN 103008635B
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- mould
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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 mould and preparation method thereof, be specifically related to a kind of material composition of BFe30-1-1 founding mould (at the bottom of stopper bowl), configuration design and cooperation, belong to casting technology field.
Background technology
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, little producer can produce qualified product, main cause is the copper flow quantity controlling to lead to crystallizer after copper liquid dissolves by the size in the stopper of melting burner and bowl gap, the end, and the material of bowl at the bottom of stopper is graphite, because BFe30-1-1 founding cast temperature is high in actual production, bowl at the bottom of stopper contacts with high-temperature copper liquid and namely progressively to melt at 15 minutes that cause cannot from main regulation copper flow quantity (stove of casting be generally at 45-70 minute), adjustment burner height can only be relied on during operation to carry out copper liquid liquid level in crystallization control device, by in atmosphere exposed for copper liquid, both caused ingot casting oxygen content high, to exceed standard (standard-required C≤0.05% containing " C " amount because the carbon of graphite piece melts to cause in copper liquid simultaneously, content height then affects the service life of material), above problem is there is not in another copper-nickel alloy BFe10-1-1 because casting temperature is low.The present invention overcomes the deficiency existed in bowl technology at the bottom of stopper in BFe30-1-1 copper alloy founding production process.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, provide one can meet BFe30-1-1 copper alloy founding mould (at the bottom of stopper bowl) completely.
According to technical scheme provided by the invention, founding mould, comprises stopper and end bowl; Stopper is made up of front end, middle part and tail end, and front end is circular arc; End bowl comprises at the bottom of the rim of a bowl, through hole and bowl; Stopper front end coordinates 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 preparation method of described founding mould, formula rate by weight step is as follows:
(1) prepare: batching clears up readjusting operations scene before selecting materials, keep no-sundries; Check and clean up the equipment such as mixer, vibrating head; Inspection water, its water quality must reach drinking water standard;
Leave machining allowance according to the size of designing mould, make template with steel plate and hardwood plate, formwork quality should be guaranteed not to be shifted, not spillage;
(2) discharging: get 65 ~ 70 parts of Al
2o
3; 8 ~ 12 parts of MgO; 12 ~ 16 parts of SiC, the curing agent of 2 ~ 4 parts and 4 ~ 6 parts of adhesives, add in agitator, evenly adds the water of 4 ~ 6 parts 35 ~ 45 DEG C, and after mixing JW-250 type forced mixer stirs 8 ~ 12min, discharging obtains castable;
(3) mould is entered: get castable that step (2) goes out and pour in the mould that step (1) prepares in the 30min of discharging, layering ram-jolt, every layer height 190 ~ 210mm, can not touch anchoring piece and thermal insulation layer during vibration, must not shake for a long time at same position or heavily shake; Treat that slurry is returned on surface, after bubble tails off, vibrating head is slowly extracted out, avoid product produce segregation phenomenon and occur hole;
(4) form removal: product surface sclerosis in step (3) gained mould, form removal when intensity reaches 70% ~ 75%, maintenance 22 ~ 26h, with 1000W electric light baking 40h, until castable is hardened completely;
(5) aft-loaded airfoil: by step (4) products obtained therefrom according to the machined of mould drawing requirement size, obtain product founding mould.
Described adhesive is PA-80 adhesive.
Described curing agent is R2256 curing agent.
During batching, grain size proportion is granularity 0.2 ~ 0.5mm, accounts for 23%; Granularity is 0.05 ~ 0.2mm, accounts for 40%; Granularity is less than 0.05mm, accounts for 25%; Ultramicro-powder accounts for 12%.
The composition proportion of raw material, material, grade height, to have with the mold use life-span and directly have relation, need to select that refractory temperature is high, intensity hardness is high, anti-impact brushing force is strong, chemical composition is not conflicted with BFe30-1-1, impurity content is low, have the material of good 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 DEG C of water-cooleds) is secondary | ≥6 |
| Al 2O 3+MgO％ | ≥58 |
| Al 2O 3+MgO+SiC％ | ≥88 |
For ensureing the die quality after processing, also need to adopt many grain compositions to put, adopt the principle of most dense packing carry out all with change reasonable disposition, adopt oxidation resistant Ultramicro-powder to fill space simultaneously, 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.
The design of stopper and end bowl is also the key factor affecting service life with coordinating, design of the present invention adopts in both junctions with arc transition, stopper head hardness a little higher than end bowl is simultaneously with hemisphere format, and end bowl adopts the circular arc at low center, make both can combine closely and can also be able to use under end bowl progressively weares and teares
Tool of the present invention has the following advantages: the present invention selects that refractory temperature is high, intensity hardness is high, anti-impact brushing force is strong, chemical composition, and do not conflict with BFe30-1-1, product impurity content is low, has the material of good heat conductivility.Obtained stopper and end bowl are in both junctions with arc transition, and stopper head hardness a little higher than end bowl is simultaneously with hemisphere format, and end bowl adopts the circular arc at low center, make both can combine closely and can also be able to use under end bowl progressively weares and teares.
Accompanying drawing explanation
Fig. 1 stopper structural representation of the present invention.
Fig. 2 end of the present invention bowl structure schematic diagram.
Detailed description of the invention
Below in conjunction with specific embodiment, the invention will be further described.
Embodiment 1
Founding mould, comprises stopper 1 and end bowl 2; Stopper 1 is made up of front end 3, middle part 4 and tail end 5, and front end 3 is circular arc; End bowl 2 to comprise at the bottom of the rim of a bowl 6, through hole 7 and bowl 8; Stopper 1 front end 3 coordinates 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.
The preparation method of embodiment 2 founding mould, formula rate by weight step is as follows:
(1) prepare: batching clears up readjusting operations scene before selecting materials, keep no-sundries; Check and clean up the equipment such as mixer, vibrating head; Inspection water, its water quality must reach drinking water standard;
Leave machining allowance according to the size of designing mould, make template with steel plate and hardwood plate, formwork quality should be guaranteed not to be shifted, not spillage;
(2) discharging: get 65 parts of Al
2o
3; 8 parts of MgO; 12 parts of SiC, the curing agent of 2 parts and 4 parts of adhesives, add in agitator, evenly adds the water of 4 parts 35 ~ 45 DEG C, and after mixing JW-250 type forced mixer stirs 8 ~ 12min, discharging obtains castable;
(3) mould is entered: get castable that step (2) goes out and pour in the mould that step (1) prepares in the 30min of discharging, layering ram-jolt, every layer height 190mm, can not touch anchoring piece and thermal insulation layer during vibration, must not shake for a long time at same position or heavily shake; Treat that slurry is returned on surface, after bubble tails off, vibrating head is slowly extracted out, avoid product produce segregation phenomenon and occur hole;
(4) form removal: product surface sclerosis in step (3) gained mould, form removal when intensity reaches 70%, maintenance 22h, with 1000W electric light baking 40h, until castable is hardened completely;
(5) aft-loaded airfoil: by step (4) products obtained therefrom according to the machined of mould drawing requirement size, obtain product founding mould.
Described adhesive is PA-80 adhesive.
Described curing agent is R2256 curing agent.
The preparation method of embodiment 3 founding mould, formula rate by weight step is as follows:
(1) prepare: batching clears up readjusting operations scene before selecting materials, keep no-sundries; Check and clean up the equipment such as mixer, vibrating head; Inspection water, its water quality must reach drinking water standard;
Leave machining allowance according to the size of designing mould, make template with steel plate and hardwood plate, formwork quality should be guaranteed not to be shifted, not spillage;
(2) discharging: get 65 ~ 70 parts of Al
2o
3; 12 parts of MgO; 16 parts of SiC, the curing agent of 4 parts and 6 parts of adhesives, add in agitator, evenly adds the water of 6 parts 45 DEG C, and after mixing JW-250 type forced mixer stirs 12min, discharging obtains castable;
(3) mould is entered: get castable that step (2) goes out and pour in the mould that step (1) prepares in the 30min of discharging, layering ram-jolt, every layer height 210mm, can not touch anchoring piece and thermal insulation layer during vibration, must not shake for a long time at same position or heavily shake; Treat that slurry is returned on surface, after bubble tails off, vibrating head is slowly extracted out, avoid product produce segregation phenomenon and occur hole;
(4) form removal: product surface sclerosis in step (3) gained mould, form removal when intensity reaches 75%, maintenance 26h, with 1000W electric light baking 40h, until castable is hardened completely;
(5) aft-loaded airfoil: by step (4) products obtained therefrom according to the machined of mould drawing requirement size, obtain product founding mould.
The preparation method of embodiment 4 founding mould, formula rate by weight step is as follows:
(1) prepare: batching clears up readjusting operations scene before selecting materials, keep no-sundries; Check and clean up the equipment such as mixer, vibrating head; Inspection water, its water quality must reach drinking water standard;
Leave machining allowance according to the size of designing mould, make template with steel plate and hardwood plate, formwork quality should be guaranteed not to be shifted, not spillage;
(2) discharging: get 68 parts of Al
2o
3; 10 parts of MgO; 14 parts of SiC, the curing agent of 3 parts and 5 parts of adhesives, add in agitator, evenly adds the water of 5 parts 35 ~ 45 DEG C, and after mixing JW-250 type forced mixer stirs 8 ~ 12min, discharging obtains castable;
(3) mould is entered: get castable that step (2) goes out and pour in the mould that step (1) prepares in the 30min of discharging, layering ram-jolt, every layer height 200mm, can not touch anchoring piece and thermal insulation layer during vibration, must not shake for a long time at same position or heavily shake; Treat that slurry is returned on surface, after bubble tails off, vibrating head is slowly extracted out, avoid product produce segregation phenomenon and occur hole;
(4) form removal: product surface sclerosis in step (3) gained mould, form removal when intensity reaches 72%, maintenance 24h, with 1000W electric light baking 40h, until castable is hardened completely;
(5) aft-loaded airfoil: by step (4) products obtained therefrom according to the machined of mould drawing requirement size, obtain product founding mould.
Cast under other conditions equal 3 stove BFe30-1-1 " C ", " O " content balance of stopper prepared by embodiment 2-4 and end bowl and conventional graphite goods is as shown in table 2.
Table 2
Other elements do not change.In following process and use, the product of graphite product is obviously better than by the BFe30-1-1 of bowl casting at the bottom of this product stopper.
Claims (5)
1. founding mould, comprises stopper (1) and end bowl (2); Stopper (1) is made up of front end (3), middle part (4) and tail end (5), and front end (3) are circular arc; End bowl (2) comprises at the bottom of the rim of a bowl (6), through hole (7) and bowl (8); Stopper (1) front end (3) coordinates 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. the preparation method of founding mould as claimed in claim 1, described founding mould comprises stopper (1) and end bowl (2), and step is as follows by weight to it is characterized in that formula rate:
(1) prepare: batching clears up readjusting operations scene before selecting materials, keep no-sundries; Check and clean up mixer, vibrating head; Inspection water, its water quality must reach drinking water standard;
Leave machining allowance according to the size of designing mould, make template with steel plate and hardwood plate, formwork quality should be guaranteed not to be shifted, not spillage;
(2) discharging: get 65 ~ 70 parts of Al
2o
3; 8 ~ 12 parts of MgO; 12 ~ 16 parts of SiC, the curing agent of 2 ~ 4 parts and 4 ~ 6 parts of adhesives, add in agitator, evenly adds the water of 4 ~ 6 parts 35 ~ 45 DEG C, and after mixing JW-250 type forced mixer stirs 8 ~ 12min, discharging obtains castable;
(3) mould is entered: get castable that step (2) goes out and pour in the mould that step (1) prepares in the 30min of discharging, layering ram-jolt, every layer height 190 ~ 210mm, can not touch anchoring piece and thermal insulation layer during vibration, must not shake for a long time at same position or heavily shake; Treat that slurry is returned on surface, after bubble tails off, vibrating head is slowly extracted out, avoid product produce segregation phenomenon and occur hole;
(4) form removal: product surface sclerosis in step (3) gained mould, form removal when intensity reaches 70% ~ 75%, maintenance 22 ~ 26h, with 1000W electric light baking 40h, until castable is hardened completely;
(5) aft-loaded airfoil: by step (4) products obtained therefrom according to the machined of mould drawing requirement size, obtain product founding mould.
3. the preparation method of founding mould as claimed in claim 2, is characterized in that: described adhesive is PA-80 adhesive.
4. the preparation method of founding mould as claimed in claim 2, is characterized in that: described curing agent is R2256 curing agent.
5. the preparation method of founding mould as claimed in claim 2, is characterized in that: during batching, grain size proportion is granularity 0.2 ~ 0.5mm, accounts for 23%; Granularity is 0.05 ~ 0.2mm, accounts for 40%; Granularity is less than 0.05mm, accounts for 25%; 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 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103008635A CN103008635A (en) | 2013-04-03 |
| CN103008635B true 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 |
|---|---|
| CN103008635A (en) | 2013-04-03 |
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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. |
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