CN104148592A - Production method of cover type industrial furnace diffuser - Google Patents
Production method of cover type industrial furnace diffuser Download PDFInfo
- Publication number
- CN104148592A CN104148592A CN201410449220.2A CN201410449220A CN104148592A CN 104148592 A CN104148592 A CN 104148592A CN 201410449220 A CN201410449220 A CN 201410449220A CN 104148592 A CN104148592 A CN 104148592A
- Authority
- CN
- China
- Prior art keywords
- foam mold
- sprue
- casting
- production method
- mold
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
The invention relates to the technical field of casting and provides a production method of a cover type industrial furnace diffuser. The production method is characterized by comprising the following processing steps: 1, manufacturing a foam mold according to a designed structure size of a product, and buying or manufacturing a full mold; 2, applying a high-temperature painting to the surface of the foam die and placing the die in a casting box of the full mold, placing quartz dry sand with the diameter of 3 to 3 mm around the foam mold, vibrating the mold, placing an exhaust pipe in the casting box; 3, placing a sprue to be communicated with the foam mold; 4, using the material of 30Cr16Ni4Si2N for steelmaking and casting, wherein the material comprises the following chemical components by weight percent: 0.3 of C, 14 to 16 of Cr, 4 to 6 of Ni, 1.5 to 2.5 of Si, 0.23 to 0.25 of Cu, 0.23 to 0.25 of Mo, 0.12 to 0.15 of N, and the balance of Fe; 5, pouring molten steel obtained in step 4 into the full mold through the sprue, pouring under negative pressure, and forming a casting after coagulating and cooling; 6, opening the box to taken out the casting, cutting a pouring gate and polishing to obtain a finished product. The method provided by the invention effectively solves the problems of high probability of deformation and cracking, and short service life of a traditional diffuser.
Description
Technical field
The present invention relates to casting technology field, especially a kind of production method of bell-type industrial furnace diffuser.
Background technology
Bell-type industrial furnace diffuser is due to its complex structure (referring to Fig. 1,2), divide upper and lower two-layer, centre is provided with a plurality of guide vanes, weight is large, (diameter reaches 1m-4m), environment for use severe (working environment high temperature reaches 800-900 ℃) requires properties of product high, so production and processing is very difficult, belongs to a world-class difficult problem.At present, traditional production method is: select 304 or 302 stainless steels to adopt ordinary sand casting methods to divide six or more after multi-disc (domestic reach 16) casting, form through welding processing again, adopt the diffuser of produced in conventional processes, owing to having adopted welding technology, after applied at elevated temperature, product can produce displacement, injustice, strain cracking, be no more than 1 year service life the longest, be only generally six months, and product cost is higher, gives and use enterprise to bring production cost pressure.There is enterprise to carry out monoblock cast pilot production for this reason.According to the design feature of diffuser, by the traditional design mode of thinking, mostly adopted running channel design as shown in Figure 7, i.e. a sprue 5, two-layer mould running channel 6, and mould running channel is provided with many around inner ring surface, and break through on material is selected, be not 302,304 stainless steels, the problem of existence is: (1) adopt many running channels to enter molten steel, product became uneven, physical dimension is difficult to guarantee, while unpacking, cast member stress is excessive, causes foundry goods cracking, difficult moulding.(2) because this product design is that circle is two-layer up and down, middle Shi Liu road blade, the upper strata support plate of attaching most importance to, lower floor is carrying board, intermediate blade is deflector, generally after having watered molten steel, while taking out foundry goods, foundry goods can ftracture voluntarily, because circular product is two-layer up and down, stress cannot be eliminated.(3) many are entered molten steel running channel, when taking out foundry goods, must cut running channel dead head, and while foundry goods is heated too large when cutting, and pressure concentration causes after running channel cutting, along with a large amount of contractions, and foundry goods cracking.So up to the present, except the applicant both at home and abroad temporarily without monoblock cast successful examples.
Summary of the invention
Object of the present invention will solve the yielding cracking of existing diffuser exactly, and the problem that service life is short provides a kind of production method of bell-type industrial furnace diffuser.
Concrete scheme of the present invention is: a kind of production method of bell-type industrial furnace diffuser, is characterized in that: comprise following processing step:
(1) by product design physical dimension, make foam mold, purchase or make by oneself evaporative pattern;
(2) in foam mold appearance, coat the molding box that high-temperature coatings is put into evaporative pattern, adopting particle diameter is the quartzy dry husky filled and process mould surrounding of 2-3mm, and vibration molding, is furnished with exhaust duct in molding box;
(3) a sprue is set and is communicated with foam mold;
(4) select 30Cr16Ni4Si2N material steel casting, its chemical analysis percentage by weight is: C 0.3, Cr 14-16, Ni 4-6, Si 1.5-2.5, Cu 0.23-0.25, Mo 0.23-0.25, N 0.12-0.15, surplus Fe;
(5) the water of (4) step being made steel is poured in evaporative pattern by sprue, under negative pressure, pours into a mould, and solidifies cooling rear formation foundry goods;
(6) unpack and take out foundry goods, cutting polishing pouring gate finished product.
Step described in the present invention is (2) and (3), and when product diameter is at 1.5 meters and when following, the layout that the upper strata of foam mold should be faced up, is communicated with sprue in the upper aspect of foam mold and encircles heavy wall place; When 1.5 meters of product diameter >, the layout that the upper strata of foam mold should be faced down, is communicated with sprue equally in the upper aspect of froth foam mould and encircles heavy wall place.
The steel-making materials chemistry composition percentage by weight optimal proportion of selecting in the present invention is: C 0.3, and Cr 15, and Ni 5, and Si 2.0, and Cu 0.24, and Mo 0.24, and N 0.13, surplus Fe.
The present invention passes through preferred material, adopt evaporative pattern negative pressure production technology, particularly break through traditional design theory, adopt single straight running channel to cast, diffuser integral casting forming is achieved, and product qualification rate reaching 100%, test shows that the diffuser bearing capacity under 900 ℃ of high temperature that adopts the inventive method to produce reaches 60-80 ton (general work pressure is below 50 tons), and modification, does not ftracture, can, for 10 years, be the more than ten times of conventional diffuser service life.
Accompanying drawing explanation
Fig. 1 is that diameter is 1.5m diffuser structure front view;
Fig. 2 is that diameter is 1.5m diffuser structure top view;
Fig. 3 is that diameter is that 1.5m diffuser structure sprue is arranged schematic diagram;
Fig. 4 is that diameter is 3.06m diffuser structure front view;
Fig. 5 is that diameter is 3.06m diffuser structure top view;
Fig. 6 is that diameter is that 3.06m diffuser structure running channel is arranged schematic diagram;
Fig. 7 is the running channel schematic diagram that diffuser is arranged by traditional design method.
In figure: 1-diffuser, 2-sprue, 3-diffuser, 4-sprue, 5-sprue, 6-mould running channel.
The specific embodiment
Example 1: referring to Fig. 1,2,3, this is the diffuser 1 of a diameter phi 1.5m, and its production method comprises following processing step: (1) make foam mold by product design physical dimension, purchase or make by oneself evaporative pattern; (2) in foam mold appearance, coat the molding box that high-temperature coatings is put into evaporative pattern, make the upper strata of the foam mold layout (referring to Fig. 3) that faces up, adopting particle diameter is the quartzy dry husky filled and process mould surrounding of 2-3mm, and vibration molding, is furnished with exhaust duct in molding box; (3) the interior ring of the upper aspect heavy wall place that a sprue 2 is communicated with foam mold is set; (4) select 30Cr16Ni4Si2N material steel casting, its chemical analysis percentage by weight is: C 0.3, and Cr 14, and Ni 6, and Si 1.5, and Cu 0.25, and Mo 0.23, and N 0.12, surplus Fe; (5) the water of (4) step being made steel is poured in evaporative pattern by sprue, under negative pressure, pours into a mould, and solidifies cooling rear formation foundry goods; (6) unpack and take out foundry goods, cutting polishing pouring gate finished product.
Test shows: diffuser bearing capacity under 900 ℃ of high temperature that said method is produced reaches 60 tons, and can reach 10 years service life.
Example 2: referring to Fig. 4,5,6, this is the diffuser 3 of a diameter phi 3.06m, and its production method comprises following processing step: (1) make foam mold by product design physical dimension, purchase or make by oneself evaporative pattern; (2) in foam mold appearance, coat the molding box that high-temperature coatings is put into evaporative pattern, make the upper strata of the foam mold layout (referring to Fig. 6) that faces down, adopting particle diameter is the quartzy dry husky filled and process mould surrounding of 2-3mm, and vibration molding, is furnished with exhaust duct in molding box; (3) the interior ring of the upper aspect heavy wall place that a sprue 4 is communicated with foam mold is set; (4) select 30Cr16Ni4Si2N material steel casting, its chemical analysis percentage by weight is: C 0.3, and Cr 16, and Ni 4, and Si 2.5, and Cu 0.23, and Mo 0.25, and N 0.15, rare earth 0.08-0.10, surplus Fe; (5) the water of (4) step being made steel is poured in evaporative pattern by sprue, under negative pressure, pours into a mould, and solidifies cooling rear formation foundry goods; (6) unpack and take out foundry goods, cutting polishing pouring gate finished product.
Test shows: diffuser bearing capacity under 900 ℃ of high temperature that said method is produced reaches 70 tons, and can reach 10 years service life.
Example 3: produce the diffuser of a diameter phi 1m, its production method comprises following processing step: (1) make foam mold by product design physical dimension, purchase or make by oneself evaporative pattern; (2) in foam mold appearance, coat the molding box that high-temperature coatings is put into evaporative pattern, adopting particle diameter is the quartzy dry husky filled and process mould surrounding of 2-3mm, and vibration molding, is furnished with exhaust duct in molding box; (3) a sprue is set and is communicated with foam mold; (4) select 30Cr16Ni4Si2N material steel casting, its chemical analysis percentage by weight is: C 0.3, and Cr 15, and Ni 5, and Si 2.0, and Cu 0.24, and Mo 0.24, and N 0.13, surplus Fe; (5) the water of (4) step being made steel is poured in evaporative pattern by sprue, under negative pressure, pours into a mould, and solidifies cooling rear formation foundry goods; (6) unpack and take out foundry goods, cutting polishing pouring gate finished product.
Test shows: diffuser bearing capacity under 900 ℃ of high temperature that said method is produced reaches 80 tons, and can reach 10 years service life.
Claims (3)
1. a production method for bell-type industrial furnace diffuser, is characterized in that: comprise following processing step:
(1) by product design physical dimension, make foam mold, purchase or make by oneself evaporative pattern;
(2) in foam mold appearance, coat the molding box that high-temperature coatings is put into evaporative pattern, adopting particle diameter is the quartzy dry husky filled and process mould surrounding of 2-3mm, and vibration molding, is furnished with exhaust duct in molding box;
(3) a sprue is set and is communicated with foam mold;
(4) select 30Cr16Ni4Si2N material steel casting, its chemical analysis percentage by weight is: C 0.3, Cr 14-16, Ni 4-6, Si 1.5-2.5, Cu 0.23-0.25, Mo 0.23-0.25, N 0.12-0.15, surplus Fe;
(5) the water of (4) step being made steel is poured in evaporative pattern by sprue, under negative pressure, pours into a mould, and solidifies cooling rear formation foundry goods;
(6) unpack and take out foundry goods, cutting polishing pouring gate finished product.
2. the production method of a kind of bell-type industrial furnace diffuser according to claim 1, it is characterized in that: described step is (2) and (3), when product diameter is at 1.5 meters and when following, the layout that the upper strata of foam mold should be faced up, is communicated with sprue in the upper aspect of foam mold and encircles heavy wall place; When 1.5 meters of product diameter >, the layout that the upper strata of foam mold should be faced down, is communicated with sprue equally in the upper aspect of foam mold and encircles heavy wall place.
3. the production method of a kind of bell-type industrial furnace diffuser according to claim 1, is characterized in that: the steel-making materials chemistry composition percentage by weight of selecting is: C 0.3, and Cr 15, and Ni 5, Si 2.0, and Cu 0.24, and Mo 0.24, N 0.13, rare earth 0.09, surplus Fe.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410449220.2A CN104148592B (en) | 2014-09-05 | 2014-09-05 | The production method of a kind of cover formula industrial furnace scatterer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410449220.2A CN104148592B (en) | 2014-09-05 | 2014-09-05 | The production method of a kind of cover formula industrial furnace scatterer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104148592A true CN104148592A (en) | 2014-11-19 |
| CN104148592B CN104148592B (en) | 2016-06-08 |
Family
ID=51874323
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410449220.2A Active CN104148592B (en) | 2014-09-05 | 2014-09-05 | The production method of a kind of cover formula industrial furnace scatterer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104148592B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4034119B2 (en) * | 2002-05-23 | 2008-01-16 | 株式会社木村鋳造所 | Low carbon steel casting production method and mold |
| CN101962732A (en) * | 2010-11-09 | 2011-02-02 | 徐宏亮 | Austenite nodular cast iron diffuser and production method thereof |
| JP5147019B2 (en) * | 2009-05-22 | 2013-02-20 | 新日鐵住金株式会社 | Continuous casting method of high alloy steel |
| CN103008548A (en) * | 2012-12-26 | 2013-04-03 | 安岳县金龙机械制造有限公司 | Lost foam casting method |
-
2014
- 2014-09-05 CN CN201410449220.2A patent/CN104148592B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4034119B2 (en) * | 2002-05-23 | 2008-01-16 | 株式会社木村鋳造所 | Low carbon steel casting production method and mold |
| JP5147019B2 (en) * | 2009-05-22 | 2013-02-20 | 新日鐵住金株式会社 | Continuous casting method of high alloy steel |
| CN101962732A (en) * | 2010-11-09 | 2011-02-02 | 徐宏亮 | Austenite nodular cast iron diffuser and production method thereof |
| CN103008548A (en) * | 2012-12-26 | 2013-04-03 | 安岳县金龙机械制造有限公司 | Lost foam casting method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104148592B (en) | 2016-06-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104195448B (en) | Casting alloy material and the technique casting ocean platform canine tooth roller box foundry goods with it | |
| CN103464693B (en) | A kind of casting technique reducing traction sheave grooving surface hardness difference | |
| CN101417329A (en) | Method with lost foam casting process production blast furnace water-cooling wall | |
| CN104174820B (en) | A kind of ocean platform climbs the casting technique of machine secondary planet frame | |
| CN104174819B (en) | The climb casting technique of machine third-level planetary frame of a kind of ocean platform | |
| CN104226915B (en) | Casting method of hollow shaft and casting mold | |
| CN106001446A (en) | Method and mold for producing passenger car engine single-chip main bearing cover | |
| CN101524740B (en) | Vertical-parting casting section die | |
| CN102706920B (en) | Method for evaluating mixed crystal formation tendency of single-crystal high-temperature alloys | |
| CN202555770U (en) | Bimetal casting vertical parting string pouring type pouring system | |
| CN204934503U (en) | A kind of abrasive disk foundry goods and abrasive disk casting pattern | |
| CN104148592A (en) | Production method of cover type industrial furnace diffuser | |
| CN104985133A (en) | Inblock cast producing method of large-sized long-strip box body provided with long-strip cavity | |
| CN204842872U (en) | Water -cooling fire door the whole cast sand mould structure | |
| CN105149521B (en) | Steelframe casting and its production technology in a kind of subway | |
| CN203917854U (en) | A kind of vertical centrifugal casting device for the preparation of Concentric Reducers | |
| CN203281877U (en) | Full-automatic composite type shell investment casting valve production line | |
| CN202877472U (en) | Fusible mould shell | |
| CN101417326A (en) | Casting method of automobile brake drum and mold | |
| CN201342464Y (en) | Mould for casting car brake drum | |
| CN207103764U (en) | A kind of foundry sand tank tower | |
| CN204817918U (en) | Large -scale rectangular box the whole cast sand mould structure with rectangular cavity | |
| CN206305381U (en) | Single rising head sand gear ring casting mould | |
| CN205437036U (en) | Nodular cast iron brake cylinder casting casting machine | |
| CN212398000U (en) | Iron ring sand casting mould |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |