CN102441643B - Lost-foam casting production process combined with thermal spraying surface treatment - Google Patents
Lost-foam casting production process combined with thermal spraying surface treatment Download PDFInfo
- Publication number
- CN102441643B CN102441643B CN2011104036850A CN201110403685A CN102441643B CN 102441643 B CN102441643 B CN 102441643B CN 2011104036850 A CN2011104036850 A CN 2011104036850A CN 201110403685 A CN201110403685 A CN 201110403685A CN 102441643 B CN102441643 B CN 102441643B
- Authority
- CN
- China
- Prior art keywords
- thermal spraying
- casting
- temperature
- foam casting
- lost foam
- 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.)
- Expired - Fee Related
Links
Images
Abstract
The invention discloses a lost-foam casting production process combined with thermal spraying surface treatment, which combines the characteristics of a thermal spraying process and a lost-foam casting process, and closely combines the two processes to the greatest extent. In the invention, by using a large amount of residual casting heat produced in the cooling process after castings are cast and formed and using the characteristics of a lost-foam casting method that falling sand is easy to clean, the surface quality is high and a running and feeding system is small, the aftertreatment of rough castings and the pretreatment of thermal spraying in the process of lost-foam casting are merged, thereby forming a set of new process which is simplified, economical, energy-saving and environmental-friendly.
Description
Technical field
The present invention relates to a kind of lost foam casting production technology for extraordinary castings production, specifically a kind of in conjunction with thermal spraying surface-treated lost foam casting production technology.
Background technology
Development along with the most advanced branches of science and modern industry, each industrial department requires plant equipment to descend operation steady in a long-term at high parameter (high temperature, high pressure, high-speed and increasingly automated) and abominable working condition (as serious abrasion and corrosion) more and more, and is also more and more high to the serviceability requirement of material and facility and component of machine.The application of high-performance special part and market have obtained increasing fast accordingly, seek economic, practical method and obtain the research and development direction that the high-performance special part becomes this field.
Surface engineering technology arises at the historic moment thus: people are in production practices, on the surface of common material, make a special working surface, it is reached: a series of several functions such as anticorrosion, wear-resisting, anti-attrition, high temperature resistance, anti-oxidant, heat insulation, insulation, conduction, anti-microwave radiation, realize economical with materials, the purpose of energy savings.In addition, as important material forming technique, foundry engieering is to obtain one of the most common and economic means of part.Obviously, plasma spray technology combines with the cast form technology, can not need the metal (as titanium, nickel, cobalt, tungsten, zirconium etc.) of usage comparison costliness to carry out monoblock cast and can obtain the high-performance special foundry goods, and application prospect is very wide.The present invention is conceived to this, in conjunction with thermal spraying Surface Engineering and lost foam casting process characteristics, proposed a comprehensive Foundry Production scheme of cover, taken full advantage of afterheat in casting and saved the pre-pre-treatment link of thermal spraying, realized to greatest extent surface engineering technology being fused in the casting production process flow process going.
Thermal spraying and evaporative pattern technical background see for details as follows:
Plasma spray technology is as an important branch in Surface Engineering, have a wide range of applications industrial, its know-why is for passing through the thermals source such as flame, electric arc or plasma, certain powdery, band shape, thread or bar-shaped metal or nonmetallic coating material are heated to melting or half melting state, and the molten drop that will speed up formation sprays at a high speed matrix and forms coating.Hot-spraying coating is because of excellent functions such as the difference of coating material can realize high-temperature corrosion resistance, resistance to wears, heat insulation, anti-electromagnetic waves, and can reduce the accessory size that wearing and tearing, corrosion or processing error cause to repair.Industrial hot-spraying technique commonly used comprises wire flame spraying, flame spray powder coating, electric arc spraying, air plasma spraying, detonation flame spraying and HVAF technology etc. at present, and all kinds of hot-spraying technique flow processs have comprised the processes such as the pre-pre-treatment in workpiece substrate surface, thermal spraying, post processing, fine finishining.Wherein pre-pre-treatment comprises roughening treatment, ungrease treatment and the pre-heat treatment, and is specific as follows.
(1) roughening treatment: the surface of thermal spraying should have suitable surface roughness, in order to increase the gross area that is bonded to particle on parent metal and the temperature that improves contact area.The pit that the size of surface roughness can be close to the surface take the particle of dusty spray is as degree, and the such pit quantity of piece surface is more, and be combined with coating must be just more firm for underlying metal.And sprayed coating is thicker, and prefabricated surface just should be more coarse.The processing of surface roughness can be adopted the methods such as sandblast, cutting thread or annular knurl (Shot Blasting may not reach to a certain degree effect for certain special workpiece special circumstances).
(2) ungrease treatment: ungrease treatment is also the important step that prepare on the surface, only just passable inside and outside rinsing with degreasing solvent for the part that steel is processed, but cast iron part is owing to absorbing grease, the grease that grows out from the micropore of part when sprayed particle and piece surface clash into can hinder the combination of coating and matrix, so cast iron part must soak in the solvent of people's heat cleaning or boil in special container before spraying.Preferably part is sling, so that the grease that washes down and solvent flow away together in cleaning.Washing agent can be used the baked aqueous slkali of 10-15Kg/m concentration.Degreasing wants later water to wash down, and then dries in baking oven or blows away moisture with compressed air.The piece surface for preparing does not go to touch with hand again.If can not spray after the surface is ready at once, should consider that the increase anchoring strength of coating with the resting period will descend.Therefore the resting period surpasses 8 hours in the room, and is outdoor and be 0.5 hour in wet weather.Preferably be no more than 1 hour for Al-alloy products.
(3) the pre-heat treatment: in order to make the piece surface activation, remove residual moisture, reduce the bond strength of internal stress and raising coating and matrix, part will be preheating to 100-150 ℃ before thermal spraying, if spraying is to carry out in low temperature environment, preheating is even more important.Desirable preheat temperature, steelwork are 150 ℃, and copper and alloy thereof are 50 ℃, and nickel and alloy thereof are 180 ℃, and aluminium and alloy thereof are 100 ℃.
lost foam casting (claiming again cavityless casting) is with foamed plastics (EPS, STMMA or EPMMA) macromolecular material makes and to become and the design of part that will produce casting, the duplicate full mold mould of size, (rise and strengthen through the dip-coating fireproof coating, bright and clean, permeation functions) and the oven dry after, be embedded in dried quartz sand through the three-dimensional vibrating moulding, the casting molding flask pours into molten metal liquid under negative pressure state, the gasification of being heated of macromolecular material model is extracted out, and then the novel casting method of the disposal molding New Casting Technique production foundry goods that is formed after liquid metals replacement cooled and solidified.
Compare with the conventional cast technology, Technology of EPC has impayable advantage.It has following characteristics: 1, casting quality is good, and cost is low; 2, material is not limit, and size is all suitable; 3, high, any surface finish of precision, minimizing cleaning, saving machine add; 4, internal flaw greatly reduces, foundry goods dense structure; 5, can realize extensive, production in enormous quantities; 6, be applicable to the production in enormous quantities casting of identical foundry goods; 7, being applicable to manually-operated and automatic assembly line production run controls; 8, the production status of production line meets the requirement of green technology parameter index; 8, can greatly improve the working environment of foundry production line and working condition, reduce labour intensity, reduce energy resource consumption.
Summary of the invention
The technical problem to be solved in the present invention is to provide that a kind of it merges lost foam casting process and thermal spraying operation mutually in conjunction with thermal spraying surface-treated lost foam casting production technology, realizes the purpose of economic, energy-conservation and environmental protection.
Technical scheme of the present invention is:
A kind of in conjunction with thermal spraying surface-treated lost foam casting production technology, comprise the following steps:
(1), lost foam casting: foamed plastics is made the full mold mould corresponding with the design of part that will produce casting, size;
(2), the full mold mould is embedded in quartz sand through three-dimensional modeling, then coordinate with sandbox and carry out casting sand type, after sand casting is good with the sandbox mould assembling, casting of molten metal in the sandbox then;
(3), after casting complete, foundry goods carries out cooling, when being cooled between 200-400 ℃, carries out under this range temperature that knockout breaks away from and the cutting dead head, obtains the foundry goods crude green body of any surface finish;
(4), carry out ball blast or blasting treatment under foundry goods crude green body uniform temperature, this temperature is on the thermal spraying pretreatment temperature 50-200 ℃, and the processing time is 2-20 minute;
(5), the foundry goods after ball blast or blasting treatment is carried out the thermal spraying surface treatment, after last sealing of hole finished product, the temperature of thermal spraying is 50-250 ℃.
Described lost foam casting is that foamed plastics is made the full mold corresponding with the design of part that will produce casting, size, then after dip-coating fireproof coating and oven dry the full mold mould.
The temperature of described thermal spraying is: steelwork: 100-200 ℃; Copper and alloy thereof: 50-100 ℃; Nickel and alloy thereof: 150-250 ℃; Aluminium and alloy thereof: 50-200 ℃.
Described foamed plastics is selected EPS, STMMA or EPMMA foam.
Advantage of the present invention:
(1), utilize the characteristics that lost foam casting sand shakeout is leveled extremely easily, running and feeding system is little, complete that the foundry goods that is in after the castable operation in cooling procedure carries out under the higher temperature between 200 ℃ to 400 ℃ that knockout breaks away from and cutting dead head etc. leveled operation, obtain the foundry goods crude green body of any surface finish;
(2), the high temperature foundry goods is further cooling, carry out ball blast or blasting treatment to uniform temperature, with the roughening treatment in the pre-pre-treatment of this operation replacement thermal spraying, treatment temperature utilizes temperature measuring equipment accurately to select, be controlled on the thermal spraying treatment temperature between 50-200 ℃, ball blast or blasting treatment time just are controlled to be between 2-20 minute according to workpiece material and treatment temperature, and workpiece should be still greater than thermal spraying the pre-heat treatment temperature through ball blast or blasting treatment rear surface temperature;
(3), utilize the surperficial grease of lost foam casting process medium casting to adsorb seldom characteristics, the ungrease treatment link in the pre-pre-treatment of cancellation thermal spraying;
(4), utilize afterheat of casting, cancel the pre-heat treatment link in the pre-pre-treatment of thermal spraying, when cast(ing) surface is cooled to temperature near the thermal spraying treatment temperature, directly begin to carry out the thermal spraying surface treatment.
The present invention utilizes afterheat in casting in conjunction with thermal spraying and lost foam casting process characteristics, to greatest extent lost foam casting operation and thermal spraying operation is merged mutually, realizes the purpose of economic, energy-conservation and environmental protection.
Description of drawings
Fig. 1 is process chart of the present invention.
The specific embodiment
A kind of in conjunction with thermal spraying surface-treated lost foam casting production technology, comprise the following steps:
(1), lost foam casting: foamed plastics (EPS, STMMA or EPMMA foam) is made the full mold corresponding with the design of part that will produce casting, size, then after dip-coating fireproof coating and oven dry the full mold mould;
(2), the full mold mould is embedded in quartz sand through three-dimensional modeling, then coordinate with sandbox and carry out casting sand type, after sand casting is good with the sandbox mould assembling, casting of molten metal in the sandbox then;
(3), after casting complete, foundry goods carries out cooling, when being cooled between 200-400 ℃, carries out under this range temperature that knockout breaks away from and the cutting dead head, obtains the foundry goods crude green body of any surface finish;
(4), carry out ball blast or blasting treatment under foundry goods crude green body uniform temperature, this temperature is on the thermal spraying pretreatment temperature 50-200 ℃, and the processing time is 2-20 minute;
(5), the foundry goods after ball blast or blasting treatment is carried out the thermal spraying surface treatment, after last sealing of hole finished product, the temperature of thermal spraying is: steelwork: 100-200 ℃; Copper and alloy thereof: 50-100 ℃; Nickel and alloy thereof: 150-250 ℃; Aluminium and alloy thereof: 50-200 ℃.
Claims (4)
1. one kind in conjunction with thermal spraying surface-treated lost foam casting production technology, it is characterized in that: comprise the following steps:
(1), lost foam casting: foamed plastics is made the full mold mould corresponding with the design of part that will produce casting, size;
(2), the full mold mould is embedded in quartz sand through three-dimensional modeling, then coordinate with sandbox and carry out casting sand type, after sand casting is good with the sandbox mould assembling, casting of molten metal in the sandbox then;
(3), after casting complete, foundry goods carries out cooling, when being cooled between 200-400 ℃, carries out under this range temperature that knockout breaks away from and the cutting dead head, obtains the foundry goods crude green body of any surface finish;
(4), carry out ball blast or blasting treatment under foundry goods crude green body uniform temperature, this temperature is on the thermal spraying pretreatment temperature 50-200 ℃, and the processing time is 2-20 minute;
(5), the foundry goods after ball blast or blasting treatment is carried out the thermal spraying surface treatment, after last sealing of hole finished product, the temperature of thermal spraying is 50-250 ℃.
2. according to claim 1 a kind of in conjunction with thermal spraying surface-treated lost foam casting production technology, it is characterized in that: described lost foam casting is that foamed plastics is made the full mold corresponding with the design of part that will produce casting, size, then after dip-coating fireproof coating and oven dry the full mold mould.
3. according to claim 1 a kind of in conjunction with thermal spraying surface-treated lost foam casting production technology, it is characterized in that: the temperature of described thermal spraying is: steelwork: 100-200 ℃; Copper and alloy thereof: 50-100 ℃; Nickel and alloy thereof: 150-250 ℃; Aluminium and alloy thereof: 50-200 ℃.
4. according to claim 1 a kind of in conjunction with thermal spraying surface-treated lost foam casting production technology, it is characterized in that: described foamed plastics is selected EPS, STMMA or EPMMA foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104036850A CN102441643B (en) | 2011-12-08 | 2011-12-08 | Lost-foam casting production process combined with thermal spraying surface treatment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011104036850A CN102441643B (en) | 2011-12-08 | 2011-12-08 | Lost-foam casting production process combined with thermal spraying surface treatment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102441643A CN102441643A (en) | 2012-05-09 |
| CN102441643B true CN102441643B (en) | 2013-05-15 |
Family
ID=46004859
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011104036850A Expired - Fee Related CN102441643B (en) | 2011-12-08 | 2011-12-08 | Lost-foam casting production process combined with thermal spraying surface treatment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102441643B (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102974762A (en) * | 2012-12-24 | 2013-03-20 | 昌图县吉派机械铸造有限责任公司 | Vacuum evanescent die casting process |
| CN105312501A (en) * | 2015-11-02 | 2016-02-10 | 广西博白县三田机械制造有限公司 | Die casting method |
| CN105478670A (en) * | 2015-12-10 | 2016-04-13 | 宋和明 | Automatic crank switch manufacturing method |
| CN112140008A (en) * | 2019-06-28 | 2020-12-29 | 南京辉腾机械铸造有限公司 | Casting included angle grinding process |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107885A (en) * | 1985-10-28 | 1987-05-06 | 梁·汤姆 | The metal flow passage of used in lost wax casting |
| JP2003305537A (en) * | 2002-04-12 | 2003-10-28 | 悠己也 ▲高▼木 | Spray casting method |
| CN1535781A (en) * | 2003-04-03 | 2004-10-13 | 蒋荣昌 | Metal thermal melting spray-casting artistic works and its production method |
| CN101380663A (en) * | 2008-08-19 | 2009-03-11 | 侯马市模范机械制造有限公司 | Precision casting method of lost foam hollow-shell |
| CN101638788A (en) * | 2008-07-28 | 2010-02-03 | 沈阳工业大学 | Process for preparing antioxidant and wear-resistant layer on surface of copper |
-
2011
- 2011-12-08 CN CN2011104036850A patent/CN102441643B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN85107885A (en) * | 1985-10-28 | 1987-05-06 | 梁·汤姆 | The metal flow passage of used in lost wax casting |
| JP2003305537A (en) * | 2002-04-12 | 2003-10-28 | 悠己也 ▲高▼木 | Spray casting method |
| CN1535781A (en) * | 2003-04-03 | 2004-10-13 | 蒋荣昌 | Metal thermal melting spray-casting artistic works and its production method |
| CN101638788A (en) * | 2008-07-28 | 2010-02-03 | 沈阳工业大学 | Process for preparing antioxidant and wear-resistant layer on surface of copper |
| CN101380663A (en) * | 2008-08-19 | 2009-03-11 | 侯马市模范机械制造有限公司 | Precision casting method of lost foam hollow-shell |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102441643A (en) | 2012-05-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102554125B (en) | Precision casting method of aluminum gearbox | |
| CN102228956B (en) | Precision fire mould casting process of series sliding bed bedplates for turnouts of high-speed railway lines for passenger transport and special die | |
| CN102343418B (en) | Casting method of three-dimensional flow aluminum alloy impeller casting | |
| CN102441643B (en) | Lost-foam casting production process combined with thermal spraying surface treatment | |
| CN103223466B (en) | Rapid metal die manufacturing method for turbine blades | |
| CN102605312B (en) | Method for processing surface of plastic mould | |
| CN101434026B (en) | High-melting metal arc spraying rapid die-manufacturing method | |
| CN104674157A (en) | Copper casting mould rapidly moulded by hot spraying technology and manufacturing method of copper casting mould | |
| CN103710660A (en) | Method for size restoring and reinforcing of outer wall and inner wall of water-cooling cylinder sleeve of engine | |
| CN101524739A (en) | Precision-investment casting method | |
| CN106001450A (en) | Cylinder sleeve casting technology | |
| CN103990760A (en) | Lost foam casting process of aluminum alloy cylinder body or cylinder cover | |
| CN101422816A (en) | Exposed gear casting no-choke riser-head technique design | |
| CN105583362A (en) | Casting method for producing steel casting through precoated sand | |
| CN108018548A (en) | One kind repairs tungsten base powder alloy die casting coating alloy and preparation method thereof | |
| CN102212773A (en) | Method for rapidly manufacturing steel-base mould by thermal spraying | |
| CN102242332B (en) | Meltallizing surface treatment process | |
| CN101294267A (en) | Anticorrosion method for slush mold | |
| CN101347828A (en) | Lost foam casting method of mould sand substituted by steel shot | |
| CN102601347B (en) | Casting device and method of coated magnesium alloy casting by using in-mould spraying method | |
| CN103882362B (en) | A kind of master mold for low-melting-point metal electric arc spraying mould is prepared and release method | |
| CN101920329B (en) | Method for manufacturing die casting die core | |
| CN102424945B (en) | High-melting metal mold shell non-internal stress rapid manufacturing process and device | |
| CN105964920A (en) | White die casting process for ductile iron casting | |
| CN103111469A (en) | Plasma spray welding composite roll, composite roll collar and manufacturing method thereof |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130515 Termination date: 20171208 |