CN107030252A - A kind of cast steel evaporative pattern surface coating material - Google Patents

A kind of cast steel evaporative pattern surface coating material Download PDF

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Publication number
CN107030252A
CN107030252A CN201710449328.5A CN201710449328A CN107030252A CN 107030252 A CN107030252 A CN 107030252A CN 201710449328 A CN201710449328 A CN 201710449328A CN 107030252 A CN107030252 A CN 107030252A
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CN
China
Prior art keywords
parts
coating
cast steel
pattern surface
evaporative pattern
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Pending
Application number
CN201710449328.5A
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Chinese (zh)
Inventor
姜阀
吴瑞华
孙庆兵
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Anhui Kangrui High-Tech New Material Technology Engineering Co Ltd
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Anhui Kangrui High-Tech New Material Technology Engineering Co Ltd
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Priority to CN201710449328.5A priority Critical patent/CN107030252A/en
Publication of CN107030252A publication Critical patent/CN107030252A/en
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    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C3/00Selection of compositions for coating the surfaces of moulds, cores, or patterns

Abstract

Field is manufactured the present invention relates to coating, and in particular to a kind of cast steel evaporative pattern surface coating material.Cast steel evaporative pattern surface coating material needs preferable gas permeability and higher intensity and preferable suspension.The present invention includes 60~80 parts of bauxite, 20~40 parts of zirconium English powder, 2~5 parts of sodium base soil, 0.5~1.0 part of sanlose, 0.5~1.0 part of phenolic resin, 0.1~0.5 part of PVB resin, 2~6 parts of Ludox, 1~2 part of polyoxethylene octylphenyl phenol ether, 2~3 parts of n-butanol, 1~3 part of talcum powder.Good permeability after coating produced by the present invention is brushed, coating intensity is high, coating suspension is good.

Description

A kind of cast steel evaporative pattern surface coating material
Technical field
Field is made the present invention relates to coating, and in particular to a kind of cast steel evaporative pattern surface coating material.
Background technology
Lost foam casting(Also known as cavityless casting)It is by the paraffin similar to casting dimension shape or bubbles model bonding group Synthetic model cluster, after brushing fireproof coating and drying, is embedded in vibration molding in drystone sand, pours into a mould under negative pressure, make model gas Change, liquid metals occupies modal position, and the novel casting method of casting is formed after solidification cooling.Traditional cast paint simply exists Stop buffer action is played in the middle of casting and casting mold, is reached under Sand sticking-resistant purpose, but conventional cast coating high temperature due to adhesive force Difference, low intensity, fire resisting are poor, gas forming amount is big, easily cause casting and produce the defects such as scab, sand holes, stomata, carbon slag.
Modeling Material used in lost foam casting is usually common drystone sand, and foamed polystyrene pattern is replaced by liquid metal When, a large amount of gases that thermal decomposition is produced will can be discharged outside casting mold by space between dry sand.However, work of the liquid metal in negative pressure The space that is easily penetrated under between dry sand and form penetration.In order to avoid producing penetration, evaporative pattern apperance surface One layer of fireproof coating must be coated with.During casting-up, this layer of fireproof coating be between molten metal and molding sand, it is right Gasification, molten metal filling and formation of casting of evaporative pattern apperance etc. are played a very important role.
Surface coating material is one of key technology of lost foam casting, and the quality of coating directly affects the matter of disappearance die casting Amount.Carburetting, hydrogenation, stomata of steel-casting etc. are the problems of lost foam casting, and which greatly limits lost foam cast steel The application of technology.In the production of steel-casting lost foam casting, coating is to influence a key factor of steel casting surface carburetting.Apply The good permeability of the bed of material, can reduce carbon increasing amount, and the composition of coating is different, and its gas permeability is also different.In addition, lost foam casting is applied Material also require have high intensity, good suspension, heat endurance, easily come off from cast(ing) surface, the low spy of simple to operate, cost Property, particularly water based paint.And for lost foam cast steel, more require that dope layer has good gas permeability, to reduce surface increasing Carbon amounts.
Cast steel evaporative pattern surface coating material is surveyed in the case where meeting production requirement with STZ types direct reading permmeter It is fixed, its gas permeability must not must not be dried less than 80, its suspension less than 90%, coating after must not peeling and cracking, intensity detection not Less than 7.5 kilograms.
By detection, at present the gas permeability of common cast steel evaporative pattern surface coating material 85 or so, suspension 92% or so, 8 kilograms or so of intensity, non-scale does not ftracture after coating is dried.
The content of the invention
It is an object of the invention to provide a kind of cast steel evaporative pattern surface coating material, to solve what is mentioned in above-mentioned background technology Problem.
To achieve the above object, the present invention provides following technical scheme:A kind of cast steel evaporative pattern surface coating material, comprising with Lower raw material composition:Bauxite, zirconium English powder, sodium base soil, sanlose, phenolic resin, PVB resin, Ludox, polyoxy Ethene octyl phenol ether, n-butanol, talcum powder.
Bauxite got along well under pouring temperature metal oxide generation low melting point, while molten steel and its oxide are to aluminium The wellability of alumina is than relatively low, and thus be accordingly used in coating can play good anti-burnon effect.The sintering temperature of zirconium English powder and fusing There is a wider temperature range between temperature, this is an important feature of zirconium English powder, be conducive to obtaining sinter coating.Zirconium English Powder shows as neutral and faintly acid at high temperature, and thermal coefficient of expansion is small, not with iron oxide chemically reactive, is conducive in Big Steel Castings Scab defect is prevented on steel part.
Make lost foam paint layer that there is higher strength of coating from high/low temperature compound binding agent, using phenolic resin and PVB is combined, and has higher intensity [5 than being used alone..Start softening when Ludox is more than 1 000 DEG C, there is coating Good toughness, in casting process, erosion and crack resistance with good anti-metal liquid, the high temperature for improving coating are strong Degree.Therefore low temperature bonding agent is done in selection phenolic resin and PVB combinations, and Ludox does high-temperature agglomerant.
Make composite suspension agent from sodium base soil and sodium carboxymethylcellulose.Sodium base soil particle particle very little, Water Molecular Adsorption On its surface, and enter formation colloid particle between crystal layer, the particle forms space net structure in colloidal solution, makes sodium base Soil paste has yield value, and coating particles particle is difficult, it is ensured that the suspension of coating is preferable.
It is preferred that, in above-mentioned coating, the weight ratio of bauxite and zirconium English powder is 7:3 .
It is preferred that, in above-mentioned coating, described talcum powder accounts for the 2% of coating gross weight.
It is preferred that, the raw material comprising following weight decile is constituted in above-mentioned coating:60~80 parts of bauxite, zirconium English powder 20~ 40 parts, 2~5 parts of sodium base soil, 0.5~1.0 part of sanlose, 0.5~1.0 part of phenolic resin, PVB resin 0.1~ 0.5 part, 2~6 parts of Ludox, 1~2 part of polyoxethylene octylphenyl phenol ether, 2~3 parts of n-butanol, 1~3 part of talcum powder.
It is preferred that, the raw material comprising following weight decile is constituted in above-mentioned coating:70 parts of bauxite, 30 parts of zirconium English powder, sodium 5 parts of base soil, 0.7 part of sanlose, 0.7 part of phenolic resin, 0.3 part of PVB resin, 4 parts of Ludox, polyoxyethylene are pungent 1.3 parts of alkylphenol ether, 2.2 parts of n-butanol, 2 parts of talcum powder.
It is preferred that, in above-mentioned coating, described bauxite, zirconium English powder, sodium base soil, talcum powder be granularity for 280 mesh~ Powder between 400 mesh.
It is preferred that, in above-mentioned coating, the weight ratio that described phenolic resin has PVB resin is 7:3 .
The technological merit of the present invention is:
(1)Good permeability after coating is brushed.
(2)The intensity of coating is high.
(3)The suspension of coating is good.
Embodiment
The technical scheme of this patent is described in more detail with reference to specific embodiment.
Embodiment 1:
A kind of cast steel evaporative pattern surface coating material, it is as follows using process and performance detection step:
(1)Weigh sodium base native 2 parts, the carboxymethyl cellulose of 60 parts of the bauxite, 20 parts of the zirconium English powder of 300 mesh, 300 mesh of 300 mesh 0.5 part of sodium salt, 0.5 part of phenolic resin, 0.1 part of PVB resin, 2 parts of Ludox, 1 part of polyoxethylene octylphenyl phenol ether, n-butanol 2 Part, 1 part of the talcum powder of 300 mesh.Add water and be mixed into saturation mixing slurry.
(2)Gas permeability is detected
Sand permeability is determined with STZ types direct reading permmeter, the sieve of the mesh of last layer 140 is covered in one end of test specimen tube Obturaged at net, side face seam with adhesive tape.During measure, with hairbrush by paint brush on screen cloth, coating layer thickness control 0.8~1 Between mm, after being air-dried through 12 h, then it is put on STZ instrument and determines its gas permeability, take the average value of 3 measurement results.By measurement knot Fruit charges to table 1.
(3)Intensity detection
Four glasss of flow cups are applied to scribbling coating with NDJ-5(With hairbrush by paint brush on screen cloth, coating layer thickness control at 1 millimeter , coating through 12 h air-dry)Glass plate on knockout (80~100 mesh), until galling coating expose glass plate untill, penetration hole diameter For the mm of 1.O~1.5, knockout gross mass is weighed up, the quality index for judging dope layer surface strength is used as.Testing result is charged to Table 1.
(4)Suspension is detected
Determined with 100 mL graduated cylinders.Slurry charge weight cylinder will be applied, untill the cm of scale 100,24 h is stood, reads sediment Volume (%), is the suspension of the coating.Testing result is charged into table 1.
The measurement result 1 of table 1
Coating is originated Gas permeability Suspension Intensity Cracking Resistance of Coating
Embodiment 1 103 95% 8.5kg Non-scale does not ftracture
Common coating 85 or so 92% or so 8.0kg Non-scale does not ftracture
Critical field ≥80 ≥90% ≥7.5 kg Non-scale does not ftracture
According to the testing result of table 1, coating made from the present embodiment, intensity height, good permeability, suspension are good.
Embodiment 2:
A kind of cast steel evaporative pattern surface coating material, it is as follows using process and performance detection step:
(1)Weigh sodium base native 5 parts, the carboxymethyl cellulose of 80 parts of the bauxite, 40 parts of the zirconium English powder of 300 mesh, 300 mesh of 300 mesh 1 part of sodium salt, 1 part of phenolic resin, 0.5 part of PVB resin, 6 parts of Ludox, 2 parts of polyoxethylene octylphenyl phenol ether, 3 parts of n-butanol, 3 parts of the talcum powder of 300 mesh.Add water and be mixed into saturation mixing slurry.
(2)Gas permeability is detected
Sand permeability is determined with STZ types direct reading permmeter, the sieve of the mesh of last layer 140 is covered in one end of test specimen tube Obturaged at net, side face seam with adhesive tape.During measure, with hairbrush by paint brush on screen cloth, coating layer thickness control 0.8~1 Between mm, after being air-dried through 12 h, then it is put on STZ instrument and determines its gas permeability, take the average value of 3 measurement results.By measurement knot Fruit charges to table 2.
(3)Intensity detection
Four glasss of flow cups are applied to scribbling coating with NDJ-5(With hairbrush by paint brush on screen cloth, coating layer thickness control at 1 millimeter , coating through 12 h air-dry)Glass plate on knockout (80~100 mesh), until galling coating expose glass plate untill, penetration hole diameter For the mm of 1.O~1.5, knockout gross mass is weighed up, the quality index for judging dope layer surface strength is used as.Testing result is charged to Table 2.
(4)Suspension is detected
Determined with 100 mL graduated cylinders.Slurry charge weight cylinder will be applied, untill the cm of scale 100,24 h is stood, reads sediment Volume (%), is the suspension of the coating.Testing result is charged into table 2.
The measurement result 2 of table 2
Coating is originated Gas permeability Suspension Intensity Cracking Resistance of Coating
Embodiment 1 115 96% 8.7kg Non-scale does not ftracture
Common coating 85 or so 92% or so 8.0kg Non-scale does not ftracture
Critical field ≥80 ≥90% ≥7.5 kg Non-scale does not ftracture
According to the testing result of table 2, coating made from the present embodiment, intensity height, good permeability, suspension are good.
Embodiment 3:
A kind of cast steel evaporative pattern surface coating material, it is as follows using process and performance detection step:
(1)Weigh sodium base native 5 parts, the carboxymethyl cellulose of 70 parts of the bauxite, 30 parts of the zirconium English powder of 300 mesh, 300 mesh of 300 mesh 0.7 part of sodium salt, 0.7 part of phenolic resin, 0.3 part of PVB resin, 4 parts of Ludox, 1.3 parts of polyoxethylene octylphenyl phenol ether, n-butanol 2.2 parts, 2 parts of the talcum powder of 300 mesh.Add water and be mixed into saturation mixing slurry.
(2)Gas permeability is detected
Sand permeability is determined with STZ types direct reading permmeter, the sieve of the mesh of last layer 140 is covered in one end of test specimen tube Obturaged at net, side face seam with adhesive tape.During measure, with hairbrush by paint brush on screen cloth, coating layer thickness control 0.8~1 Between mm, after being air-dried through 12 h, then it is put on STZ instrument and determines its gas permeability, take the average value of 3 measurement results.By measurement knot Fruit charges to table 3.
(3)Intensity detection
Four glasss of flow cups are applied to scribbling coating with NDJ-5(With hairbrush by paint brush on screen cloth, coating layer thickness control at 1 millimeter , coating through 12 h air-dry)Glass plate on knockout (80~100 mesh), until galling coating expose glass plate untill, penetration hole diameter For the mm of 1.O~1.5, knockout gross mass is weighed up, the quality index for judging dope layer surface strength is used as.Testing result is charged to Table 3.
(4)Suspension is detected
Determined with 100 mL graduated cylinders.Slurry charge weight cylinder will be applied, untill the cm of scale 100,24 h is stood, reads sediment Volume (%), is the suspension of the coating.Testing result is charged into table 3.
The measurement result 3 of table 3
Coating is originated Gas permeability Suspension Intensity Cracking Resistance of Coating
Embodiment 1 124 97% 9.4kg Non-scale does not ftracture
Common coating 85 or so 92% or so 8.0kg Non-scale does not ftracture
Critical field ≥80 ≥90% ≥7.5 kg Non-scale does not ftracture
According to the testing result of table 3, coating made from the present embodiment, intensity height, good permeability, suspension are good.
The preferred embodiment to this patent is explained in detail above, but this patent is not limited to above-described embodiment, In the knowledge that one of ordinary skill in the art possesses, it can also make each on the premise of this patent objective is not departed from Plant change.It should be appreciated that all other specific embodiments based on the present invention program protection scope of the present invention it It is interior.

Claims (7)

1. a kind of cast steel evaporative pattern surface coating material, it is characterised in that include following raw material composition:Bauxite, zirconium English powder, sodium base soil, Sanlose, phenolic resin, PVB resin, Ludox, polyoxethylene octylphenyl phenol ether, n-butanol, talcum powder.
2. a kind of cast steel evaporative pattern surface coating material according to claim 1, it is characterised in that:The weight of bauxite and zirconium English powder Amount is than being 7:3 .
3. a kind of cast steel evaporative pattern surface coating material according to claim 1, it is characterised in that:Described talcum powder accounts for coating The 2% of gross weight.
4. a kind of cast steel evaporative pattern surface coating material according to claim 1, it is characterised in that include following weight decile Raw material is constituted:60~80 parts of bauxite, 20~40 parts of zirconium English powder, 2~5 parts of sodium base soil, sanlose 0.5~1.0 Part, 0.5~1.0 part of phenolic resin, 0.1~0.5 part of PVB resin, 2~6 parts of Ludox, polyoxethylene octylphenyl phenol ether 1~2 Part, 2~3 parts of n-butanol, 1~3 part of talcum powder.
5. a kind of cast steel evaporative pattern surface coating material according to claim 1, it is characterised in that include following weight decile Raw material is constituted:70 parts of bauxite, 30 parts of zirconium English powder, sodium base soil 5 parts, 0.7 part of sanlose, 0.7 part of phenolic resin, 0.3 part of PVB resin, 4 parts of Ludox, 1.3 parts of polyoxethylene octylphenyl phenol ether, 2.2 parts of n-butanol, 2 parts of talcum powder.
6. a kind of cast steel evaporative pattern surface coating material according to claim 4 or claim 5, it is characterised in that described Bauxite, zirconium English powder, sodium base soil, talcum powder are granularity for the powder between the mesh of 280 mesh~400.
7. a kind of cast steel evaporative pattern surface coating material according to claim 1, it is characterised in that:Described phenolic resin has The weight ratio of PVB resin is 7:3 .
CN201710449328.5A 2017-06-14 2017-06-14 A kind of cast steel evaporative pattern surface coating material Pending CN107030252A (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108044022A (en) * 2018-01-13 2018-05-18 合肥市瑞宏重型机械有限公司 It is a kind of for alcohol-base paint of sand casting and preparation method thereof
CN109794581A (en) * 2019-03-25 2019-05-24 中国人民解放军军事科学院国防工程研究院工程防护研究所 A kind of lost foam paint suitable for the casting of continuous Thin-Section Steel Castings

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103357813A (en) * 2013-07-24 2013-10-23 翼城县福旺铸造实业有限公司 Lost foam steel-casting paint formula and technology method thereof
CN104550677A (en) * 2014-12-16 2015-04-29 世林(漯河)冶金设备有限公司 Cast iron evanescent mode paint and preparation method thereof
CN105983646A (en) * 2015-01-30 2016-10-05 重庆广鼎道路设施有限公司 Lost foam casting paint

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103357813A (en) * 2013-07-24 2013-10-23 翼城县福旺铸造实业有限公司 Lost foam steel-casting paint formula and technology method thereof
CN104550677A (en) * 2014-12-16 2015-04-29 世林(漯河)冶金设备有限公司 Cast iron evanescent mode paint and preparation method thereof
CN105983646A (en) * 2015-01-30 2016-10-05 重庆广鼎道路设施有限公司 Lost foam casting paint

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
郭广思等: "消失模铸钢水基涂料的研制", 《特种铸造及有色合金》 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108044022A (en) * 2018-01-13 2018-05-18 合肥市瑞宏重型机械有限公司 It is a kind of for alcohol-base paint of sand casting and preparation method thereof
CN109794581A (en) * 2019-03-25 2019-05-24 中国人民解放军军事科学院国防工程研究院工程防护研究所 A kind of lost foam paint suitable for the casting of continuous Thin-Section Steel Castings

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Application publication date: 20170811