CN104148592B - The production method of a kind of cover formula industrial furnace scatterer - Google Patents
The production method of a kind of cover formula industrial furnace scatterer Download PDFInfo
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- CN104148592B CN104148592B CN201410449220.2A CN201410449220A CN104148592B CN 104148592 B CN104148592 B CN 104148592B CN 201410449220 A CN201410449220 A CN 201410449220A CN 104148592 B CN104148592 B CN 104148592B
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Abstract
The present invention relates to casting technology field, it is the production method of a kind of cover formula industrial furnace scatterer, it is characterized in that: comprise following processing step: (1) make foam mold by product design scantlings of the structure, purchase or make by oneself disappearance mould; (2) coating, in foam mold appearance, the molding box that high-temperature coatings puts into disappearance mould, adopt particle diameter to be the dry husky filled and process mould surrounding of 2-3mm quartz, vibration molding, is furnished with exhaust passage in molding box; (3) a sprue is set and is connected foam mold; (4) select 30Cr16Ni4Si2N material steel casting, does is its Chemical Composition weight percent: 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) water of step (4) being made steel is poured in disappearance mould by sprue, pours into a mould under negative pressure, forms foundry goods after solidifying cooling; (6) unpack and take out foundry goods, cutting polishing pouring gate finished product; The inventive method efficiently solves scatterer and is easily out of shape, cracking, it may also be useful to the problem that the life-span is short.
Description
Technical field
The present invention relates to casting technology field, the production method of especially a kind of cover formula industrial furnace scatterer.
Background technology
Cover formula industrial furnace scatterer is due to its complex structure (see Fig. 1,2), divide upper and lower two layers, centre is provided with multiple guide vane, weight is big, (diameter reaches 1m 4m), environment for use severe (Working environment high temperature reaches 800 900 DEG C) requires product performance height, and therefore process for processing is very difficult, belongs to a world-class difficult problem. At present, traditional production method is: becomes through welding processing after selecting 304 or 302 stainless steels to adopt ordinary sand casting methods to divide six or more sheets (domestic reach 16) casting again, adopts the scatterer of produced in conventional processes, owing to have employed welding technology, after applied at elevated temperature, product can produce displacement, uneven, strain cracking, the longest work-ing life is no more than 1 year, generally it is only six months, and product cost is higher, gives and use enterprise to bring production cost pressure. There is enterprise to carry out monoblock casting production test for this reason. Constructional feature according to scatterer, by the traditional design mode of thinking mostly have employed as shown in Figure 7 water design, i.e. sprue 5, a Liang Cengmojiao road 6, Qie Mojiao road is provided with many around inner ring surface, and not having breakthrough to be 302,304 stainless steels on Material selec-tion, Problems existing is: (1) adopt Duo Jiao road to enter molten steel, product became uneven, geometrical dimension is difficult to guarantee, when unpacking, cast member stress is excessive, causes foundry goods to ftracture, difficult shaping. (2) owing to this product design is circular upper and lower two layers, middle 16 road blades, upper strata is heavy duty plate, and lower floor is carrying board, middle blade is flow deflector, generally after having watered molten steel, when taking out foundry goods, foundry goods can ftracture voluntarily, because upper and lower two layers of circular product, stress cannot be eliminated. (3) many are entered molten steel and water, when taking out foundry goods, it is necessary to dead head is watered in cutting, and foundry goods is heated too big when cutting simultaneously, and pressure is concentrated, and after causing watering cutting, along with a large amount of contraction, foundry goods ftractures. So up to the present, both at home and abroad temporarily without monoblock casting examples of many successful except the applicant.
Summary of the invention
The object of the present invention to be solved the easy strain cracking of existing scatterer exactly, it may also be useful to the problem that the life-span is short, it is provided that the production method of a kind of cover formula industrial furnace scatterer.
The concrete scheme of the present invention is: the production method of a kind of cover formula industrial furnace scatterer, is characterized in that: comprise following processing step:
(1) make foam mold by product design scantlings of the structure, purchase or make by oneself disappearance mould;
(2) coating, in foam mold appearance, the molding box that high-temperature coatings puts into disappearance mould, adopt particle diameter to be the dry husky filled and process mould surrounding of 2-3mm quartz, vibration molding, is furnished with exhaust passage in molding box;
(3) a sprue is set and is connected foam mold;
(4) selecting 30Cr16Ni4Si2N material steel casting, its Chemical Composition weight percent is: C0.3, Cr14-16, Ni4-6, Si1.5-2.5, Cu0.23-0.25, Mo0.23-0.25, N0.12-0.15, surplus Fe;
(5) water of step (4) being made steel is poured in disappearance mould by sprue, pours into a mould under negative pressure, forms foundry goods after solidifying cooling;
(6) unpack and take out foundry goods, cutting polishing pouring gate finished product.
Step described in the present invention (2) and (3) in, when product diameter 1.5 meters and following time, the face layer of foam mold should be arranged upward, sprue is connected the thick wall place of face layer inner ring of foam mold; As product diameter > 1.5 meters, the face layer of foam mold should be arranged down, equally sprue is connected the thick wall place of face layer inner ring of froth foam mould.
The steel-making materials chemistry composition weight percent optimum proportion selected in the present invention is: C0.3, Cr15, Ni5, Si2.0, Cu0.24, Mo0.24, N0.13, surplus Fe.
The present invention passes through preferred material, adopt disappearance mould negative pressure production technique, particularly break through traditional design theory, adopt single straight to cast, scatterer integral casting forming is achieved, and product qualification rate reaching 100%, test shows that the scatterer bearing capacity under 900 DEG C of high temperature adopting the inventive method to produce reaches 60-80 ton (general work pressure is below 50 tons), and not modification, does not ftracture, work-ing life can, for 10 years, be more than ten times of conventional diffuser.
Accompanying drawing explanation
Fig. 1 is diameter is 1.5m diffuser structure front view;
Fig. 2 is diameter is 1.5m diffuser structure vertical view;
Fig. 3 is diameter is that 1.5m diffuser structure sprue arranges schematic diagram;
Fig. 4 is diameter is 3.06m diffuser structure front view;
Fig. 5 is diameter is 3.06m diffuser structure vertical view;
Fig. 6 is diameter is that 3.06m diffuser structure waters layout schematic diagram;
Fig. 7 is that scatterer waters schematic diagram by what traditional design method was arranged.
In figure: 1 scatterer, 2 sprues, 3 scatterers, 4 sprues, 5 sprues, 6 Mo Jiao roads.
Embodiment
Example 1: see Fig. 1,2,3, this is the scatterer 1 of a diameter phi 1.5m, and its production method comprises following processing step: (1) makes foam mold by product design scantlings of the structure, purchases or make by oneself disappearance mould; (2) coating, in foam mold appearance, the molding box that high-temperature coatings puts into disappearance mould, the face layer of foam mold is arranged (see Fig. 3) upward, adopt particle diameter to be the dry husky filled and process mould surrounding of 2-3mm quartz, vibration molding, is furnished with exhaust passage in molding box; (3) the thick wall place of face layer inner ring that a sprue 2 is connected foam mold is set; (4) selecting 30Cr16Ni4Si2N material steel casting, its Chemical Composition weight percent is: C0.3, Cr14, Ni6, Si1.5, Cu0.25, Mo0.23, N0.12, surplus Fe; (5) water of step (4) being made steel is poured in disappearance mould by sprue, pours into a mould under negative pressure, forms foundry goods after solidifying cooling;(6) unpack and take out foundry goods, cutting polishing pouring gate finished product.
Test shows: scatterer bearing capacity under 900 DEG C of high temperature that aforesaid method is produced reaches 60 tons, it may also be useful to the life-span can reach 10 years.
Example 2: see Fig. 4,5,6, this is the scatterer 3 of a diameter phi 3.06m, and its production method comprises following processing step: (1) makes foam mold by product design scantlings of the structure, purchases or make by oneself disappearance mould; (2) coating, in foam mold appearance, the molding box that high-temperature coatings puts into disappearance mould, the face layer of foam mold is arranged (see Fig. 6) down, adopt particle diameter to be the dry husky filled and process mould surrounding of 2-3mm quartz, vibration molding, is furnished with exhaust passage in molding box; (3) the thick wall place of face layer inner ring that a sprue 4 is connected foam mold is set; (4) selecting 30Cr16Ni4Si2N material steel casting, its Chemical Composition weight percent is: C0.3, Cr16, Ni4, Si2.5, Cu0.23, Mo0.25, N0.15, rare earth 0.08-0.10, surplus Fe; (5) water of step (4) being made steel is poured in disappearance mould by sprue, pours into a mould under negative pressure, forms foundry goods after solidifying cooling; (6) unpack and take out foundry goods, cutting polishing pouring gate finished product.
Test shows: scatterer bearing capacity under 900 DEG C of high temperature that aforesaid method is produced reaches 70 tons, it may also be useful to the life-span can reach 10 years.
Example 3: the scatterer producing a diameter phi 1m, its production method comprises following processing step: (1) makes foam mold by product design scantlings of the structure, purchases or make by oneself disappearance mould; (2) coating, in foam mold appearance, the molding box that high-temperature coatings puts into disappearance mould, adopt particle diameter to be the dry husky filled and process mould surrounding of 2-3mm quartz, vibration molding, is furnished with exhaust passage in molding box; (3) a sprue is set and is connected foam mold; (4) selecting 30Cr16Ni4Si2N material steel casting, its Chemical Composition weight percent is: C0.3, Cr15, Ni5, Si2.0, Cu0.24, Mo0.24, N0.13, surplus Fe; (5) water of step (4) being made steel is poured in disappearance mould by sprue, pours into a mould under negative pressure, forms foundry goods after solidifying cooling; (6) unpack and take out foundry goods, cutting polishing pouring gate finished product.
Test shows: scatterer bearing capacity under 900 DEG C of high temperature that aforesaid method is produced reaches 80 tons, it may also be useful to the life-span can reach 10 years.
Claims (3)
1. a production method for cover formula industrial furnace scatterer, is characterized in that: comprise following processing step:
(1) make foam mold by product design scantlings of the structure, purchase or make by oneself disappearance mould;
(2) coating, in foam mold appearance, the molding box that high-temperature coatings puts into disappearance mould, adopt particle diameter to be the dry husky filled and process mould surrounding of 2-3mm quartz, vibration molding, is furnished with exhaust passage in molding box;
(3) a sprue is set and is connected foam mold;
(4) selecting 30Cr16Ni4Si2N material steel casting, its Chemical Composition weight percent is: C0.3, Cr14-16, Ni4-6, Si1.5-2.5, Cu0.23-0.25, Mo0.23-0.25, N0.12-0.15, surplus Fe;
(5) water of step (4) being made steel is poured in disappearance mould by sprue, pours into a mould under negative pressure, forms foundry goods after solidifying cooling;
(6) unpack and take out foundry goods, cutting polishing pouring gate finished product.
2. the production method of a kind of cover formula industrial furnace scatterer according to claim 1, it is characterized in that: described step (2) and (3) in, when product diameter 1.5 meters and following time, the face layer of foam mold should be arranged upward, sprue is connected the thick wall place of face layer inner ring of foam mold; As product diameter > 1.5 meters, the face layer of foam mold should be arranged down, equally sprue is connected the thick wall place of face layer inner ring of foam mold.
3. the production method of a kind of cover formula industrial furnace scatterer according to claim 1, is characterized in that: the steel-making materials chemistry composition weight percent selected is: C0.3, Cr15, Ni5, Si2.0, Cu0.24, Mo0.24, N0.13, rare earth 0.09, surplus Fe.
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| CN201410449220.2A CN104148592B (en) | 2014-09-05 | 2014-09-05 | The production method of a kind of cover formula industrial furnace scatterer |
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| CN104148592B true CN104148592B (en) | 2016-06-08 |
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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 |
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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 |
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