CN104043779A - Process method for producing low-carbon casting by using expendable mold - Google Patents
Process method for producing low-carbon casting by using expendable mold Download PDFInfo
- Publication number
- CN104043779A CN104043779A CN201410323708.0A CN201410323708A CN104043779A CN 104043779 A CN104043779 A CN 104043779A CN 201410323708 A CN201410323708 A CN 201410323708A CN 104043779 A CN104043779 A CN 104043779A
- Authority
- CN
- China
- Prior art keywords
- casting
- coating
- evaporative pattern
- carbon dioxide
- carbon
- 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.)
- Pending
Links
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a process method for producing a low-carbon casting by using an expendable mold. The expendable mold is gasified in advance at the temperature of 500-550 DEG C in the casting process; the inner surface of a water-soluble silicate coating can effectively absorb carbon dioxide in the gasification process of the expendable mold, and the coating can be hardened; a sprayed coating is water-soluble silicate; secondary carbon dioxide adopted for strengthening the coating performs injection hardening and secondary drying; a carbonate, silicate and silicon dioxide mixture shell obtained by treatment serves as a casting mold. The method has the beneficial effects that compared with other coating processes, the expendable mold has the advantages of simplicity in operation, low cost, small working allowance, suitability for casting a complicated structure and the like; the limitation that an existing expendable mold can be used for producing a high-quality low-carbon casting such as low-carbon steel and spheroidal graphite cast iron is avoided. A casting body is cast by using the method, so that mixing of uncontrollable carbon dioxide into the casting body in the casting process can be effectively prevented.
Description
Technical field
The present invention relates to the technical field of casting mould, particularly relating to a kind of effectively preventing in Foundry Production enters in casting body because of the carbon dioxide that evaporative pattern produces in casting gasification, increase casting body carbon content and form carbide colony, for producing high-quality low-carbon (LC) foundry goods, on the basis of traditional lost foam casting process, evaporative pattern is carried out to a series of processing, to use evaporative pattern to produce a kind of process of low-carbon (LC) foundry goods.
Background technology
At present, known lost foam casting, because evaporative pattern is when casting molten iron or molten steel, evaporative pattern is at high temperature vaporized, in gasification, produce a large amount of carbon dioxide, not only increased the CO2 emission in atmosphere, and carbon dioxide is invaded in the molten iron or molten steel of melting simultaneously, cause the inner phosphorus content of casting body to raise, also cause the inner carbide colony of casting body inhomogeneous simultaneously, but so evaporative pattern can not be for the production of the high-quality low-carbon (LC) foundry goods such as mild steel and spheroidal graphite cast-iron. evaporative pattern contrasts other casting process, have simple to operate, with low cost, allowance is little, the advantages such as casting that are applicable to complex structure part.
Summary of the invention
The object of the invention is in order to overcome the crystalline phase of the effect of carbon dioxide foundry goods that evaporative pattern produces in gasification in casting, the invention provides a kind of process: at evaporative pattern surface spraying water-soluble silicate, through carbon dioxide hardening coating, dry, evaporative pattern gasification, secondary spraying, after this series of processes of post-curing coating, obtain one and there is some strength and inner level and smooth cavity, this cavity is produced foundry goods as the casting space of casting body, effectively prevent that the carbon dioxide that evaporative pattern produces in gasification from entering foundry goods, thereby use evaporative pattern to produce complex structure, low carbon containing, surplus is little, smooth surface, cost is low, the uniform high-quality foundry goods of crystalline phase.
The technical solution adopted for the present invention to solve the technical problems is:
In casting cycle, the link of evaporative pattern gasification in advance, makes the molten iron of melting or molten steel have no chance to contact with the carbon dioxide producing in evaporative pattern gasification; Water-soluble silicate is convenient in evaporative pattern surface spraying and adhesion; Water-soluble silicate can with carbon dioxide reaction, after reaction, form carbonate silicate and the silica mixture of sclerosis, there is some strength and chemical stability, surfacing is smooth; This mixture inner chamber is used as the space of casting, uses the method cast article body, can effectively prevent from sneaking into uncontrollable carbon dioxide at casting cycle medium casting body.
Concrete grammar step:
At the special-purpose foam surface spraying of the mould of evaporative pattern 2mm thickness waterglass, i.e. water-soluble silicate, molecular formula: R2OnSiO2.
In airtight space, process, at waterglass jet surface carbon dioxide, carbon dioxide reacts Formed hydrochlorate and silica with the outer surface of waterglass, thereby makes this sprayed coating outer surface sclerosis.In airtight space, its objective is as reducing the use amount of carbon dioxide and preventing that dioxide dispersion is to atmosphere.
Waterglass coating to evaporative pattern surface under 70-80 degree celsius temperature is carried out drying and processing.
Under 500-550 degree celsius temperature, evaporative pattern is gasified, main carbon dioxide and the steam of generating of evaporative pattern gasification, partial CO 2 and waterglass coating inner surface reactive absorption, remainder carbon dioxide, steam, a small amount of carbon monoxide and carbon, under the effect of vavuum pump, enter atmosphere after being pumped to limewash absorption cleaning.
After evaporative pattern is gasified totally, form the carbonate silicate of a thickness 2mm and the ghost of silica mixture, this ghost is as the casting space of follow-up cast article body.
For strengthening the intensity of mould, again spray the waterglass of 1mm thickness.
In confined space, reuse carbon dioxide jet spray sclerosis.
Under 70-80 degree celsius temperature, ghost is carried out to secondary drying processing.
In ghost mould inside, shoot out after the releasing agent of atomization, cast.
Adopt the beneficial effect of the technical program: evaporative pattern contrasts other casting process, have simple to operate, with low cost, allowance is little, be applicable to the advantages such as casting of complex structure part. having overcome evaporative pattern in the past can not be for the limitation of the production of the high-quality low-carbon (LC) foundry goods such as mild steel and spheroidal graphite cast-iron.Use the method cast article body, can effectively prevent from sneaking into uncontrollable carbon dioxide at casting cycle medium casting body.
The specific embodiment
The specific embodiment of the present invention, then be explained as follows: implementation step:
1, in the special-purpose foam surface spraying of the mould 2mm of evaporative pattern thickness waterglass (water-soluble silicate, molecular formula: R2OnSiO2).
2, in airtight space (for reducing the use amount of carbon dioxide and preventing that dioxide dispersion is to atmosphere), at waterglass jet surface carbon dioxide, carbon dioxide reacts Formed hydrochlorate and silica with the outer surface of waterglass, thereby makes this sprayed coating outer surface sclerosis.
3, under 70-80 degree celsius temperature, the waterglass coating to evaporative pattern surface is carried out drying and processing.
4, under 500-550 degree celsius temperature, evaporative pattern is gasified, main carbon dioxide and the steam of generating of evaporative pattern gasification, partial CO 2 and waterglass coating inner surface reactive absorption, remainder carbon dioxide, steam, a small amount of carbon monoxide and carbon, under the effect of vavuum pump, enter atmosphere after being pumped to lime pond absorption cleaning.
5, after evaporative pattern is gasified totally, form the carbonate silicate of a thickness 2mm and the ghost of silica mixture, this ghost is as the casting space of follow-up cast article body.
6, for strengthening the intensity of mould, again spray the waterglass of 1mm thickness.
7, in confined space, reuse carbon dioxide jet spray sclerosis.
8, under 70-80 degree celsius temperature, ghost is carried out to secondary drying.
After the releasing agent of ghost mould interior spray, cast.
Claims (2)
1. an evaporative pattern is produced low-carbon (LC) casting process method, it is characterized in that: the evaporative pattern that gasifies under 500-550 degree celsius temperature in advance in casting cycle, and water-soluble silicate coating inner surface can effectively absorb the carbon dioxide in evaporative pattern gasification and coating be played to the effect of sclerosis; Spray-on coating is water-soluble silicate; The sclerosis of secondary carbon dioxide jet and the secondary drying that for strengthening strength of coating, adopt; Process carbonate silicate later and silica mixture shell as the mould of cast member.
2. evaporative pattern according to claim 1 is produced low-carbon (LC) casting process method, it is characterized in that: described method step is at the special-purpose foam surface spraying of the mould 2mm of evaporative pattern thickness waterglass, i.e. water-soluble silicate; At waterglass jet surface carbon dioxide, Formed hydrochlorate and silica, make this sprayed coating outer surface sclerosis; Waterglass coating to evaporative pattern surface under 70-80 degree celsius temperature is dried; Under 500-550 degree celsius temperature, evaporative pattern is gasified, form the carbonate silicate of thickness 2mm and the ghost of silica mixture, as the casting space of cast article body; For strengthening the intensity of mould, again spray the waterglass of 1mm thickness; Reuse carbon dioxide jet spray sclerosis; Under 70-80 degree celsius temperature, ghost is carried out to secondary drying; After the releasing agent of ghost mould internal spray atomization, cast.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410323708.0A CN104043779A (en) | 2014-07-09 | 2014-07-09 | Process method for producing low-carbon casting by using expendable mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410323708.0A CN104043779A (en) | 2014-07-09 | 2014-07-09 | Process method for producing low-carbon casting by using expendable mold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104043779A true CN104043779A (en) | 2014-09-17 |
Family
ID=51497447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410323708.0A Pending CN104043779A (en) | 2014-07-09 | 2014-07-09 | Process method for producing low-carbon casting by using expendable mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104043779A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353779A (en) * | 2014-10-31 | 2015-02-18 | 安徽应流集团霍山铸造有限公司 | Method for removing polyvinyl chloride foam pattern during precision casting of evaporative pattern |
| CN105033179A (en) * | 2015-04-28 | 2015-11-11 | 桂林中铸机械科技有限公司 | Complex-moulding evaporative pattern casting method with foam pattern and clay or sodium silicate sand |
| CN105964920A (en) * | 2016-06-29 | 2016-09-28 | 兴化市雅兰机械制造有限公司 | White die casting process for ductile iron casting |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412076A (en) * | 2008-03-07 | 2009-04-22 | 安徽应流铸业有限公司 | A kind of precision casting technique of ceramic shell lost foam |
| CN101524739A (en) * | 2009-04-03 | 2009-09-09 | 宁波通达精密铸造有限公司 | Precision-investment casting method |
| CN101590513A (en) * | 2009-07-03 | 2009-12-02 | 郑州神牛铸造有限公司 | Method for evaporative pattern precise composite casting |
| CN101862811A (en) * | 2010-02-09 | 2010-10-20 | 徐州胜海机械制造科技有限公司 | Rapid investment casting method of complex thin-wall component |
| CN102672103A (en) * | 2012-05-29 | 2012-09-19 | 刘翔 | Shell casting method through contraction and then gasification of high-performance coating foam and mold sample of evanescent mode |
| CN103056325A (en) * | 2012-12-03 | 2013-04-24 | 南车戚墅堰机车车辆工艺研究所有限公司 | Method for casting air sucking valve steel casting part |
| CN103433434A (en) * | 2013-09-02 | 2013-12-11 | 山东墨龙石油机械股份有限公司 | Method for casting valve body of flat gate valve |
| CN103480797A (en) * | 2013-08-05 | 2014-01-01 | 天津津浦轨道交通装备配件有限责任公司 | Casting process for square shell of buffer of high-speed railway vehicle |
-
2014
- 2014-07-09 CN CN201410323708.0A patent/CN104043779A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101412076A (en) * | 2008-03-07 | 2009-04-22 | 安徽应流铸业有限公司 | A kind of precision casting technique of ceramic shell lost foam |
| CN101524739A (en) * | 2009-04-03 | 2009-09-09 | 宁波通达精密铸造有限公司 | Precision-investment casting method |
| CN101590513A (en) * | 2009-07-03 | 2009-12-02 | 郑州神牛铸造有限公司 | Method for evaporative pattern precise composite casting |
| CN101862811A (en) * | 2010-02-09 | 2010-10-20 | 徐州胜海机械制造科技有限公司 | Rapid investment casting method of complex thin-wall component |
| CN102672103A (en) * | 2012-05-29 | 2012-09-19 | 刘翔 | Shell casting method through contraction and then gasification of high-performance coating foam and mold sample of evanescent mode |
| CN103056325A (en) * | 2012-12-03 | 2013-04-24 | 南车戚墅堰机车车辆工艺研究所有限公司 | Method for casting air sucking valve steel casting part |
| CN103480797A (en) * | 2013-08-05 | 2014-01-01 | 天津津浦轨道交通装备配件有限责任公司 | Casting process for square shell of buffer of high-speed railway vehicle |
| CN103433434A (en) * | 2013-09-02 | 2013-12-11 | 山东墨龙石油机械股份有限公司 | Method for casting valve body of flat gate valve |
Non-Patent Citations (1)
| Title |
|---|
| 刘玉满: "《消失模先烧后浇空壳铸造消除碳缺陷》", 《铸造技术》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104353779A (en) * | 2014-10-31 | 2015-02-18 | 安徽应流集团霍山铸造有限公司 | Method for removing polyvinyl chloride foam pattern during precision casting of evaporative pattern |
| CN105033179A (en) * | 2015-04-28 | 2015-11-11 | 桂林中铸机械科技有限公司 | Complex-moulding evaporative pattern casting method with foam pattern and clay or sodium silicate sand |
| CN105964920A (en) * | 2016-06-29 | 2016-09-28 | 兴化市雅兰机械制造有限公司 | White die casting process for ductile iron casting |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105127361B (en) | A kind of 3D sand molds printing composite phosphate inorganic binder and preparation method thereof | |
| CN1067358C (en) | Method for production of refractory formed products and adhesive used for refractory formed products | |
| CN101412076A (en) | A kind of precision casting technique of ceramic shell lost foam | |
| CN104588572B (en) | A kind of centrifugal casting coating and preparation method thereof | |
| CN106734879B (en) | A kind of lost foam casting moulding process of waste incineration reciprocating grate bar | |
| CN103722122B (en) | A kind of sprayed on material of metal type dies and spraying coating process thereof | |
| CN102672103A (en) | Shell casting method through contraction and then gasification of high-performance coating foam and mold sample of evanescent mode | |
| CN101607301A (en) | A kind of soluble core and preparation method thereof | |
| CN105690039A (en) | Preparation method of high-pressure seamless steel cylinder | |
| CN104043779A (en) | Process method for producing low-carbon casting by using expendable mold | |
| CN104325073A (en) | Casting technology of wear-resistant and low-porosity steel casting | |
| US20040238157A1 (en) | Water-soluble casting mold and method for manufacturing the same | |
| CN105562600A (en) | White mold production process of evanescent mode | |
| CN100569959C (en) | A kind of hot disintegration method for molten steel slag | |
| CN104003366A (en) | Novel sodium tripolyphosphate production technology | |
| CN101967540A (en) | Light absorption paint for laser quenching and preparation method thereof | |
| RU2433013C1 (en) | Method of producing multilayer investment shell casting moulds | |
| CN102069145B (en) | Lost foam complex solvent formula for electric power storage (EPS) white mold shell mould casting process and method for manufacturing EPS white mold shell mould | |
| CN111455167A (en) | Sintering method for promoting combustion by water spraying for sintering machine | |
| KR20090011520A (en) | Apparatus for molding core and molding method for the same | |
| CN101837429A (en) | Carbon dioxide hardened sodium silicate sand swage sand shooting modeling method | |
| CN106498132A (en) | High-pressure gas quenching process for die | |
| CN107243620A (en) | A kind of wind-driven generator group wheel box high-pressure casting method | |
| CN104152841A (en) | Surface treatment process for carbon coated roller core | |
| CN105014051A (en) | Casting production process for machine tool shell |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20140917 |