CN104249130B - A kind of coating and preparation technology thereof improving precision casting inner surface graphite linings thickness - Google Patents
A kind of coating and preparation technology thereof improving precision casting inner surface graphite linings thickness Download PDFInfo
- Publication number
- CN104249130B CN104249130B CN201410493153.4A CN201410493153A CN104249130B CN 104249130 B CN104249130 B CN 104249130B CN 201410493153 A CN201410493153 A CN 201410493153A CN 104249130 B CN104249130 B CN 104249130B
- Authority
- CN
- China
- Prior art keywords
- coating
- graphite
- cerium
- electrolysis
- parts
- 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.)
- Active
Links
Landscapes
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a kind of coating improving precision casting inner surface graphite linings thickness, described coating comprises organic solvent and solute, described organic solvent is ethanol, described solute comprises bauxite 60-65 part, electrolysis cerium 3-6 part, sodium bentonite 1-3 part, graphite 3-7 part, dispersant 1-1.5 part, the Baume degrees of described coating is 62-68; The present invention adopts 200-300 object bauxite, graphite, sodium bentonite and electrolysis cerium, it adds active electrolysis cerium in refractory material, make matrix can possess good elevated temperature strength and stability, and electrolysis cerium can promote that Form in High Nickel Austenite Nodular Cast Iron spheroidal graphiteization is in progress, reduce the formation of stratiform graphite linings; Formulation for coating material of the present invention is simple and practical, and manufacture craft is easy and effect abundant, is worth application and promotes.
Description
Technical field
The invention belongs to casting auxiliary material technical field, be specifically related to a kind of coating and the preparation technology thereof that improve precision casting inner surface graphite linings thickness.
Background technology
Form in High Nickel Austenite Nodular Cast Iron is due to its good heat resistance and corrosion resistance, increasing application is obtained in automobile exhaust pipe manufacturer, but due to the solidification mode that it is special, make the crystallization condition of its inner surface cooling procedure different from outside, it has the structure and properties different from inside, endosexine is made to occur flake graphite defect, especially complicated pipe fitting foundry goods, have a strong impact on the quality of foundry goods, its product percent of pass is caused to reduce, hydraulic performance decline, and this defect has more present pipe fitting runner intersection or tube wall thickness changes obvious thermal center place, surface is made to produce the graphite linings being up to 0.8 ㎜, have a strong impact on the quality of product, in order to avoid the generation of this type of situation in actual production, often adopt to be coated with on core or inner core and coat, make it can form layer protective layer to prevent the generation reducing graphite linings, but the H of the inner core of the precoated sand adopting coating additive that foundry goods is used because producing after iron liquid parcel and heating, O, N gas, because of H, N gas hinders graphite element, consume the nodularization element that foundry goods inner surface and inner core connect principal surface, the inner surface of foundry goods is made to create abnormal nodularizing, there is flake graphite and lopsided graphite.
A kind of sand casting alcohol-base paint and preparation method thereof has been suffered at CN102873267A.The density of this coating is 1200-1400kg/m3, is made up of solute and organic solvent; Organic solvent is selected from one or more mixing in methyl alcohol, ethanol, isopropyl alcohol; Solute comprises the component of following weight percentage: bauxite 60-75%, attapulgite 1-5%, sodium bentonite 0.5-1.5%, amorphous graphite 2-10%, flake graphite 3-15%, iron oxide red 2-10%, polyvinyl butyral resin 1-5%, surfactant 0.1-0.5%, dispersant 0.1-0.5%, hydrochloric acid solution 1-5%; But the improvement of ductile Ni-resist cast iron foundry goods graphite linings can not be applicable to, therefore need a kind of coating that ductile Ni-resist cast iron graphite linings can be maximized process.
Summary of the invention
The present invention is to make up the deficiencies in the prior art, provides a kind of easy and simple to handle and significantly can reduce the coating of graphite linings thickness.
Technical scheme adopted to achieve these goals: a kind of coating improving precision casting inner surface graphite linings thickness, described coating comprises organic solvent and solute, described organic solvent is ethanol, described solute comprises bauxite 60-65 part, electrolysis cerium 3-6 part, sodium bentonite 1-3 part, graphite 3-7 part, dispersant 1-1.5 part, the Baume degrees of described coating is 62-68.
Described solute comprises bauxite 60 parts, electrolysis cerium 5 parts, sodium bentonite 2 parts, 5 parts, graphite, dispersant 1 part, and the Baume degrees of described coating is 65.
The granularity of described bauxite, electrolysis cerium, sodium bentonite, graphite is 200-300 order.
Improve a preparation technology for the coating of precision casting inner surface graphite linings thickness, comprise the following steps: a, add bauxite, graphite and dispersant in organic solvent and then stir;
B, the electrolysis cerium adding 3-6 part stir;
C, add the sodium bentonite of 1-3 part, stir 40-50 minute, namely obtain described coating.
Of the present invention possess following advantage:
1. the present invention adopts 200-300 object bauxite, graphite, sodium bentonite and electrolysis cerium, active electrolysis cerium is added in refractory material, make matrix can possess good elevated temperature strength and stability, and electrolysis cerium can promote that Form in High Nickel Austenite Nodular Cast Iron spheroidal graphiteization is in progress, reduce the formation of stratiform graphite linings.
2. in the end adding sodium bentonite makes the solute in the present invention to disperse in organic solvent uniformly, makes can not precipitate in pulping process, causes the phenomenon of skewness, improve stability and the brushability of coating.
3. formulation for coating material of the present invention is simple and practical, and manufacture craft is easy and effect abundant, is worth application and promotes.
detailed description of the invention:
Embodiment one: a kind of coating improving precision casting inner surface graphite linings thickness, described coating comprises organic solvent and solute, and described organic solvent is ethanol, described solute comprises bauxite 60 parts, electrolysis cerium 3 parts, sodium bentonite 1 part, 3 parts, graphite, dispersant 1 part;
The granularity of described bauxite, electrolysis cerium, sodium bentonite, graphite is 200 orders.
Improve a preparation technology for the coating of precision casting inner surface graphite linings thickness, comprise the following steps: a, add bauxite, graphite and dispersant in organic solvent and then stir;
B, the electrolysis cerium adding 3 parts stir;
C, add the sodium bentonite of 1 part, stir 45 minutes, namely obtain described coating, Baume degrees is 60.
Embodiment two:
Improve a coating for precision casting inner surface graphite linings thickness, described coating comprises organic solvent and solute, and described organic solvent is ethanol, and described solute comprises bauxite 62 parts, electrolysis cerium 5 parts, sodium bentonite 2 parts, 5 parts, graphite, dispersant 1.3 parts.
The granularity of described bauxite, electrolysis cerium, sodium bentonite, graphite is 200 orders.
Improve a preparation technology for the coating of precision casting inner surface graphite linings thickness, comprise the following steps: a, add bauxite, graphite and dispersant in organic solvent and then stir;
B, the electrolysis cerium adding 5 parts stir;
C, add the sodium bentonite of 2 parts, stir 40 minutes, namely obtain described coating, Baume degrees is 62.
Embodiment three: a kind of coating improving precision casting inner surface graphite linings thickness, described coating comprises organic solvent and solute, and described organic solvent is ethanol, described solute comprises bauxite 65 parts, electrolysis cerium 6 parts, sodium bentonite 3 parts, 7 parts, graphite, dispersant 1.5 parts.
The granularity of described bauxite, electrolysis cerium, sodium bentonite, graphite is 290 orders.
Improve a preparation technology for the coating of precision casting inner surface graphite linings thickness, comprise the following steps: a, add bauxite, graphite and dispersant in organic solvent and then stir;
B, the electrolysis cerium adding 6 parts stir;
C, add the sodium bentonite of 3 parts, stir 50 minutes, namely obtain described coating, the Baume degrees of acquisition is 61.
Embodiment four: a kind of coating improving precision casting inner surface graphite linings thickness, described coating comprises organic solvent and solute, and described organic solvent is ethanol, described solute comprises bauxite 60 parts, electrolysis cerium 5 parts, sodium bentonite 2 parts, 5 parts, graphite, dispersant 1 part
The granularity of described bauxite, electrolysis cerium, sodium bentonite, graphite is 300 orders.
Improve a preparation technology for the coating of precision casting inner surface graphite linings thickness, comprise the following steps: a, add bauxite, graphite and dispersant in organic solvent and then stir;
B, the electrolysis cerium adding 5 parts stir;
C, add the sodium bentonite of 2 parts, stir 48 minutes, namely obtain described coating, the Baume degrees of described coating is 65.
Embodiment five: a kind of coating improving precision casting inner surface graphite linings thickness, described coating comprises organic solvent and solute, and described organic solvent is ethanol, described solute comprises bauxite 65 parts, electrolysis cerium 6 parts, sodium bentonite 2.5 parts, 7 parts, graphite, dispersant 1.3 parts
The granularity of described bauxite, electrolysis cerium, sodium bentonite, graphite is 240 orders.
Improve a preparation technology for the coating of precision casting inner surface graphite linings thickness, comprise the following steps: a, add bauxite, graphite and dispersant in organic solvent and then stir;
B, the electrolysis cerium adding 6 parts stir;
C, add the sodium bentonite of 2.5 parts, stir 50 minutes, namely obtain described coating, the Baume degrees of described coating is 68.
The coating test result characteristic that embodiment 1-5 obtains is as shown in the table:
| Suspension stability (24 hours suspensions) | Equadag coating (thickness is millimeter) | |
| Embodiment 1 | 98% | 0.01 |
| Embodiment 2 | 95% | 0.05 |
| Embodiment 3 | 97% | 0.02 |
| Embodiment 4 | 96% | 0.09 |
| Embodiment 5 | 98% | 0.07 |
Splendid and equadag coating thickness very thin obtained of suspension stability of the present invention as can be seen from the above table, make the graphite linings that originally can arrive 0.5 ㎜, be reduced to 0.1 below ㎜, and the sidewall thickness originally producing graphite linings place is about 5 ㎜, before not adopting this coating, actual wall thickness is about 4 ㎜, adopt actual (real) thickness after the present invention to be then 4.8 more than ㎜, improve the quality of product, extend service life.
In use by uniform for the present invention dipping thermal center place and the corner being with pit, then light, for subsequent use after the drying.
Of the present invention possess following advantage:
1. the present invention adopts 200-300 object bauxite, graphite, sodium bentonite and electrolysis cerium, active electrolysis cerium is added in refractory material, make matrix can possess good elevated temperature strength and stability, and electrolysis cerium can promote that Form in High Nickel Austenite Nodular Cast Iron spheroidal graphiteization is in progress, reduce the formation of stratiform graphite linings.
2. in the end adding sodium bentonite makes the solute in the present invention to disperse in organic solvent uniformly, makes can not precipitate in pulping process, causes the phenomenon of skewness, improve stability and the brushability of coating.
3. formulation for coating material of the present invention is simple and practical, and manufacture craft is easy and effect abundant, is worth application and promotes.
Claims (4)
1. one kind is improved the coating of precision casting inner surface graphite linings thickness, it is characterized in that: described coating comprises organic solvent and solute, described organic solvent is ethanol, described solute comprises bauxite 60-65 part, electrolysis cerium 3-6 part, sodium bentonite 1-3 part, graphite 3-7 part, dispersant 1-1.5 part, the Baume degrees of described coating is 62-68.
2. improve the coating of precision casting inner surface graphite linings thickness as claimed in claim 1, it is characterized in that: described solute comprises bauxite 60 parts, electrolysis cerium 5 parts, sodium bentonite 2 parts, 5 parts, graphite, dispersant 1 part, the Baume degrees of described coating is 65.
3. improve the coating of precision casting inner surface graphite linings thickness as claimed in claim 1, it is characterized in that: the granularity of described bauxite, electrolysis cerium, sodium bentonite, graphite is 200-300 order.
4. improve a preparation technology for the coating of precision casting inner surface graphite linings thickness, it is characterized in that: comprise the following steps:
A, add bauxite, graphite and dispersant in organic solvent and then stir;
B, the electrolysis cerium adding 3-6 part stir;
C, add the sodium bentonite of 1-3 part, stir 40-50 minute, namely obtain described coating.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410493153.4A CN104249130B (en) | 2014-09-24 | 2014-09-24 | A kind of coating and preparation technology thereof improving precision casting inner surface graphite linings thickness |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410493153.4A CN104249130B (en) | 2014-09-24 | 2014-09-24 | A kind of coating and preparation technology thereof improving precision casting inner surface graphite linings thickness |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104249130A CN104249130A (en) | 2014-12-31 |
| CN104249130B true CN104249130B (en) | 2016-01-27 |
Family
ID=52184582
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410493153.4A Active CN104249130B (en) | 2014-09-24 | 2014-09-24 | A kind of coating and preparation technology thereof improving precision casting inner surface graphite linings thickness |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104249130B (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105344922A (en) * | 2015-10-26 | 2016-02-24 | 无锡市永亿精密铸造有限公司 | Primary layer coating for airplane blade precise coating |
| CN112059105B (en) * | 2020-09-18 | 2021-03-30 | 纪汉成 | Coating for thoroughly eliminating defects of reaction layer on surface of ductile iron piece |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5994550A (en) * | 1982-11-19 | 1984-05-31 | Kawasaki Steel Corp | Method for preventing deterioration in graphite texture in surface layer of casting of spherioidal graphite cast iron |
| CN101602088A (en) * | 2009-07-13 | 2009-12-16 | 西安建筑科技大学 | A kind of preparation method of iron casting coating by flyash |
| CN102000762A (en) * | 2010-11-08 | 2011-04-06 | 上海市机械制造工艺研究所有限公司 | Combined coating layer process for large-scale steel casting water glass sand molds |
| CN102873266A (en) * | 2012-10-19 | 2013-01-16 | 南京信息工程大学 | Alcohol-group dry powder sand mould foundry coating |
| CN102873267A (en) * | 2012-10-19 | 2013-01-16 | 南京信息工程大学 | Alcohol-based paint for sand casting and preparation method thereof |
| CN103056290A (en) * | 2013-01-25 | 2013-04-24 | 南京信息工程大学 | Heat-resisting cast iron casting coating and preparation method thereof |
-
2014
- 2014-09-24 CN CN201410493153.4A patent/CN104249130B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5994550A (en) * | 1982-11-19 | 1984-05-31 | Kawasaki Steel Corp | Method for preventing deterioration in graphite texture in surface layer of casting of spherioidal graphite cast iron |
| CN101602088A (en) * | 2009-07-13 | 2009-12-16 | 西安建筑科技大学 | A kind of preparation method of iron casting coating by flyash |
| CN102000762A (en) * | 2010-11-08 | 2011-04-06 | 上海市机械制造工艺研究所有限公司 | Combined coating layer process for large-scale steel casting water glass sand molds |
| CN102873266A (en) * | 2012-10-19 | 2013-01-16 | 南京信息工程大学 | Alcohol-group dry powder sand mould foundry coating |
| CN102873267A (en) * | 2012-10-19 | 2013-01-16 | 南京信息工程大学 | Alcohol-based paint for sand casting and preparation method thereof |
| CN103056290A (en) * | 2013-01-25 | 2013-04-24 | 南京信息工程大学 | Heat-resisting cast iron casting coating and preparation method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104249130A (en) | 2014-12-31 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102873266B (en) | Alcohol-group dry powder sand mould foundry coating | |
| CN104923729A (en) | Manufacturing method of composite shell of large diffuser precision casting | |
| CN104249130B (en) | A kind of coating and preparation technology thereof improving precision casting inner surface graphite linings thickness | |
| CN103302230A (en) | Special sand proportiom for casting | |
| CN102873267B (en) | Alcohol-based paint for sand casting and preparation method thereof | |
| CN102994907A (en) | Casting method of check valve body | |
| CN104014725A (en) | Improved pig-bone alcohol-based casting paint and production method thereof | |
| CN105598389A (en) | Process for casting seal rainproof complex flanges | |
| CN102864371B (en) | Brake cylinder of wind power unit and manufacturing method thereof | |
| CN104014764B (en) | A kind of aluminum alloy low-pressure casting preparation method of ceramic sprue bushing | |
| CN103586406A (en) | Casting coating for stainless steel valve body and preparation method thereof | |
| CN105418088A (en) | Preparing method for heat-shock-resisting firebricks | |
| CN103056306A (en) | Method for casting bearing seat | |
| CN109175221B (en) | Curing agent for casting self-hardening furan resin and preparation method thereof | |
| CN104876608A (en) | Manufacturing method of thermal-shock resistant refractory brick | |
| CN104876609A (en) | Thermal-shock resistant refractory brick | |
| CN104399869A (en) | Alcohol-based mica/montmorillonite composite casting paint and manufacturing method thereof | |
| CN104942220A (en) | Thermo-curing core-making process by use of inorganic binder | |
| CN108754259A (en) | A kind of high-strength aluminum alloy section and its processing method | |
| CN107755625A (en) | A kind of coating of used in aluminium alloy casting core and external mold, the preparation method of thin-wall aluminum alloy component | |
| CN103586409A (en) | Fired mold preparation technology | |
| CN103101275A (en) | Scratch-resistant aluminum alloy plate and preparation method thereof | |
| CN106077445A (en) | A kind of aluminum alloy low-pressure casting chill coating and preparation method thereof | |
| CN105014051A (en) | Casting production process for machine tool shell | |
| CN104874724A (en) | Cast steel lost foam coating |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20151216 Address after: Nanyang City, Henan province 474550 Xixia County Private eco industrial park (enter Zhen Shi Mei Long Cun) Applicant after: XIXIA COUNTY XIBENG SPECIAL FOUNDRY CO.,LTD. Address before: 474550 Industrial Zone, East Ring Road, Xixia County, Nanyang, Henan Applicant before: Henan Province Xixia Automobile Water Pump Co.,Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CP01 | Change in the name or title of a patent holder | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 474550 private Ecological Industrial Park, Xixia County, Nanyang City, Henan Province (HUICHE Town, Shiti Village) Patentee after: Xixia Feilong Special Casting Co.,Ltd. Address before: 474550 private Ecological Industrial Park, Xixia County, Nanyang City, Henan Province (HUICHE Town, Shiti Village) Patentee before: XIXIA COUNTY XIBENG SPECIAL FOUNDRY CO.,LTD. |