CN105618679A - Preparation method for automobile charging turbine - Google Patents

Preparation method for automobile charging turbine Download PDF

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Publication number
CN105618679A
CN105618679A CN201511022918.7A CN201511022918A CN105618679A CN 105618679 A CN105618679 A CN 105618679A CN 201511022918 A CN201511022918 A CN 201511022918A CN 105618679 A CN105618679 A CN 105618679A
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CN
China
Prior art keywords
charging turbine
sand
wax
mould shell
alloy
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
Application number
CN201511022918.7A
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Chinese (zh)
Inventor
刘全英
陈隽颖
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Qingdao Botai Meilian Chemical Technology Co Ltd
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Qingdao Botai Meilian Chemical Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Qingdao Botai Meilian Chemical Technology Co Ltd filed Critical Qingdao Botai Meilian Chemical Technology Co Ltd
Priority to CN201511022918.7A priority Critical patent/CN105618679A/en
Publication of CN105618679A publication Critical patent/CN105618679A/en
Pending legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/02Sand moulds or like moulds for shaped castings
    • B22C9/04Use of lost patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C1/00Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C3/00Selection of compositions for coating the surfaces of moulds, cores, or patterns
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B22CASTING; POWDER METALLURGY
    • B22CFOUNDRY MOULDING
    • B22C9/00Moulds or cores; Moulding processes
    • B22C9/22Moulds for peculiarly-shaped castings
    • B22C9/28Moulds for peculiarly-shaped castings for wheels, rolls, or rollers
    • CCHEMISTRY; METALLURGY
    • C22METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22CALLOYS
    • C22C14/00Alloys based on titanium
    • CCHEMISTRY; METALLURGY
    • C23COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
    • C23CCOATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
    • C23C30/00Coating with metallic material characterised only by the composition of the metallic material, i.e. not characterised by the coating process

Abstract

The invention discloses a preparation method for an automobile charging turbine. The preparation method comprises the steps of preparing a mould shell, batching an alloy, smelting and casting, cooling, carrying out after-treatment and the like. According to the preparation method, a TiAl-based titanium-aluminum compound is used as a charging turbine material, so that the charging turbine can continuously work for a long time at a high temperature, the performances of the charging turbine are improved, and the service life of the charging turbine is prolonged; fine sawdust and crop straw fibers are adopted as shell-making materials, so that use of refractory matters is reduced, and therefore, the preparation method is beneficial for environmental protection; and a reasonable proportion is adopted, gas permeability is increased on the premise of ensuring shell strength, and a porous material, namely attapulgite is adopted, so that gas exhaustion is facilitated, blowhole defects of the charging turbine are reduced, the yield is increased, and the weight of the mould shell is reduced.

Description

The preparation method of a kind of automobile charging turbine
Technical field
The invention belongs to metal melted module precise casting technology field, especially relate to the preparation method of a kind of automobile charging turbine.
Background technology
Mould precision casting is the casting forming process of a kind of advanced person, it is used for realizing complexity, thin-walled, accurate charging turbine is shaped, at accurate jewellery, aircraft engine and other precise forming part aspects have huge advantage, traditional investment precision casting technology makes meltability model (abbreviation fusible pattern) with meltable material (such as wax material), apply the refractory paint that some layers are special thereon, an overall module is formed through dry and hardening, melt from module again and lose fusible pattern thus obtain the mould shell of hollow, then mould shell is carried out high temperature sintering, last pour into a mould melting wherein metal and the method for charging turbine that obtains. at present multiplex ceramic sand in the production process of precision-investment casting, the mould shell that casting is smashed after terminating also exists molding sand and reclaims difficulty, problem big for environment pollution, therefore, finds a kind of high-performance, the mould shell preparation method of environmental protection is necessary very much.
Whole world auto output is still in lasting growth, owing to reducing oil consumption and improving the requirement of urban air-quality, less energy-consumption high-performance engine demand amount is also being increased day by day, turbo-supercharger can significantly improve engine power, improve discharge, reduce oil consumption, thus the engine adopting the small engine of band turbo-supercharger to substitute nature air-breathing is a basic trend of Hyundai Motor industry, what bear due to turbocharger turbine is the waste gas of engine high-temperature high pressure, passenger car diesel discharging waste gas temperature is the highest is approximately 850 DEG C, petrol motor then can reach 1050 DEG C, supercharger impeller and turbine size are little, general diameter is no more than 100mm, but rotating speed is very high, it is up to 250000r/min, continuous high speed work under severe Working environment, so the requirement of material and performance is very high.
Summary of the invention
Based on above technical problem, the present invention discloses the preparation method of a kind of environmental protection finish cast die shell, it is possible to obtains casting die shell efficiently, and adopts environment-friendly materials, protects environment and re-sources.
The technical scheme that the present invention is complete comprises:
(1) prepare mould shell, comprising: a. prepares corresponding wax-pattern, gating system, rising head according to the shape being obtained charging turbine, and be bonded to wax-pattern group; B. properly mixed zirconium English powder is adopted, silicon sol, thin wood chip, n-Octanol, Leyden blue mix and blend obtains investment precoat, vermicelli sand after Wax-coated module, facing sand component is aluminum oxide sand and thin wood chip, and c. adopts properly mixed attapulgite powder, mullite powder, crop branch fiber, silicate hydrolyzate liquid mix and blend obtained back of the body coating, hangs back of the body sand after Wax-coated module, rear slurry seal is dry for several times to repeat extension back of the body sand, and d. dewaxing roasting obtains mould shell.
(2) alloying ingredient, described alloy comprises by the chemical composition of atomic percent: Al:40.0��43.0at%, V:0.6��1.3at%, Cr:0.4��1.6at%, Nb:2��6at%, B:0.2��0.8at%, C:1.0��1.3at%, all the other are Ti.
(3) smelting and pouring, adds the alloy compositions described in step (2) in the crucible of induction melting furnace, is evacuated down to 10-4Pa; it is blown into argon gas shielded; load power to 350-400KW; after heating 20-25min, temperature arrives 1600-1800 DEG C; alloy material is incubated 10 minutes after melting completely; overturn crucible subsequently, vacuum induction melting furnace overturns crucible, alloy liquid is poured in step (1) gained mould shell.
(4) it is cooled to vacuum breaker after room temperature, mould shell is broken, obtains charging turbine.
(5) charging turbine is heat-treated, after the operations such as surface sand-blasting cleaning, obtain finished product.
(6) to parts surface deposited coatings, described coating comprises B:12.0��14.0at% by the chemical composition of atomic percent, C:36.0��44.0at%, V:8.0��12.0at%, Cr:10.0��14.0at%, Nb:5.0��6.0at%, H:6.0��13.0at%.
Hinge structure of the present invention, adopt thin wood chip, crop branch fiber as shell material processed, reduce the usage quantity of refractory materials, be both conducive to environmental protection, and adopt rational proportioning, adding ventilation property under the prerequisite ensureing investment shell intensity, the attapulgite in back of the body coating is porous material, is conducive to exhaust, reduce charging turbine gas hole defect, add yield rate, make mould shell reduce weight, and raw material is easy to get simultaneously.
Embodiment
Below in conjunction with embodiment, the present invention will be further described.
(1) prepare mould shell, comprising: a. prepares corresponding wax-pattern, gating system, rising head according to the shape being obtained charging turbine, and be bonded to wax-pattern group; B. properly mixed zirconium English powder is adopted, silicon sol, thin wood chip, n-Octanol, Leyden blue mix and blend obtains investment precoat, vermicelli sand after Wax-coated module, facing sand component is aluminum oxide sand and thin wood chip, and c. adopts properly mixed attapulgite powder, mullite powder, crop branch fiber, silicate hydrolyzate liquid mix and blend obtained back of the body coating, hangs back of the body sand after Wax-coated module, rear slurry seal is dry for several times to repeat extension back of the body sand, and d. dewaxing roasting obtains mould shell.
(2) alloying ingredient, described alloy comprises by the chemical composition of atomic percent: Al:40.0��43.0at%, V:0.6��1.3at%, Cr:0.4��1.6at%, Nb:2��6at%, B:0.2��0.8at%, C:1.0��1.3at%, all the other are Ti.
(3) smelting and pouring, adds the alloy compositions described in step (2) in the crucible of induction melting furnace, is evacuated down to 10-4Pa; it is blown into argon gas shielded; load power to 350-400KW; after heating 20-25min, temperature arrives 1600-1800 DEG C; alloy material is incubated 10 minutes after melting completely; overturn crucible subsequently, vacuum induction melting furnace overturns crucible, alloy liquid is poured in step (1) gained mould shell.
(4) it is cooled to vacuum breaker after room temperature, mould shell is broken, obtains charging turbine.
(5) charging turbine is heat-treated, after the operations such as surface sand-blasting cleaning, obtain finished product.
(6) to parts surface deposited coatings, described coating comprises B:12.0��14.0at% by the chemical composition of atomic percent, C:36.0��44.0at%, V:8.0��12.0at%, Cr:10.0��14.0at%, Nb:5.0��6.0at%, H:6.0��13.0at%.
In addition, concrete, the concrete preparation technology of described mould shell is:
(1) prepare wax-pattern, prepare corresponding wax-pattern, gating system, rising head according to the shape being obtained charging turbine, and be bonded to wax-pattern group;
(2) investment precoat preparation, by zirconium English powder, silicon sol, thin wood chip, n-Octanol, the obtained investment precoat of Leyden blue mix and blend, described zirconium English powder degree is 300 orders, thin wood chip granularity is 240 orders, and the weight proportion of above-mentioned coating component is: zirconium English powder: silicon sol: thin wood chip: n-Octanol: Leyden blue=(1800-2000): (140-160): (100-200): (1-2): (2-5);
(3) vermicelli sand: described wax-pattern group immersed in investment precoat pond, take out subsequently, makes it apply evenly to its surface blowing in rotating condition, and described blow-time is 30s-60s, it is preferable to 40s; Facing sand is spilt in rotating condition subsequently to its surface, described facing sand is facing sand component is aluminum oxide sand and thin wood chip, weight proportion is aluminum oxide sand: thin wood chip=(10-15): 1, and the granularity of aluminum oxide sand is 80-100 order, and thin wood chip granularity is 160-200 order; The dry 12-18h of the wax-pattern group hanging up properly facing sand will be coated with, it is preferable to 15h;
(4) coating preparation is carried on the back, by attapulgite powder, mullite powder, crop branch fiber, silicate hydrolyzate liquid mix and blend obtained back of the body coating, described attapulgite powder granularity is 240 orders, mullite granularity is 240 orders, crop branch fiber diameter is 2-3mm, silicate hydrolyzate liquid dioxide-containing silica is 20%, and the weight proportion of above-mentioned coating component is: attapulgite powder: mullite powder: crop branch fiber: silicate hydrolyzate liquid=(350-500): (1800-2000): (50-120): (2-4);
(5) hanging back of the body sand, dried wax-pattern group in step (3) immersed in back of the body coating pond, take out subsequently, make it apply evenly to its surface blowing in rotating condition, described blow-time is 40s-80s, it is preferable to 60s; Back of the body sand is spilt in rotating condition subsequently to its surface, described back of the body sand component is mullite meal and crop branch fiber, weight proportion is mullite meal: crop branch fiber=(10-15): 1, the granularity of mullite meal is 40-60 order, and crop branch fiber diameter is 4-6mm; The dry 12-18h of the wax-pattern group hanging up properly back of the body sand will be coated with, it is preferable to 15h;
(6) repeating step (4) and step (5) 2-4 time, until mould thickness of the shell reaches 6-10mm, it is preferable to 8mm, dry after slurry seal;
(7) dried for step (6) slurry seal mould shell is carried out steam dewaxing, dewaxing pressure is 0.4MPa��0.8MPa, and the dewaxing time is 6min��8min, sends in high temperature resistance furnace, it is warming up to 300-450 DEG C with the temperature rise rate of 2-4 DEG C/min, insulation 1.5h, is warming up to 750-800 DEG C with the temperature rise rate of 6-10 DEG C/min subsequently, insulation 1.5h, it is warming up to 1100-1250 DEG C subsequently with the temperature rise rate of 2-4 DEG C/min, insulation 4h, furnace cooling, obtains environmental protection finish cast die shell.

Claims (1)

1. the preparation method of an automobile charging turbine, it is characterised in that, comprise the steps:
(1) prepare mould shell, comprising: a. prepares corresponding wax-pattern, gating system, rising head according to the shape being obtained charging turbine, and be bonded to wax-pattern group; B. properly mixed zirconium English powder is adopted, silicon sol, thin wood chip, n-Octanol, Leyden blue mix and blend obtains investment precoat, vermicelli sand after Wax-coated module, facing sand component is aluminum oxide sand and thin wood chip, and c. adopts properly mixed attapulgite powder, mullite powder, crop branch fiber, silicate hydrolyzate liquid mix and blend obtained back of the body coating, hangs back of the body sand after Wax-coated module, rear slurry seal is dry for several times to repeat extension back of the body sand, and d. dewaxing roasting obtains mould shell.
(2) alloying ingredient, described alloy comprises by the chemical composition of atomic percent: Al:40.0��43.0at%, V:0.6��1.3at%, Cr:0.4��1.6at%, Nb:2��6at%, B:0.2��0.8at%, C:1.0��1.3at%, all the other are Ti.
(3) smelting and pouring, adds the alloy compositions described in step (2) in the crucible of induction melting furnace, is evacuated down to 10-4Pa; it is blown into argon gas shielded; load power to 350-400KW; after heating 20-25min, temperature arrives 1600-1800 DEG C; alloy material is incubated 10 minutes after melting completely; overturn crucible subsequently, vacuum induction melting furnace overturns crucible, alloy liquid is poured in step (1) gained mould shell.
(4) it is cooled to vacuum breaker after room temperature, mould shell is broken, obtains charging turbine.
(5) charging turbine is heat-treated, after the operations such as surface sand-blasting cleaning, obtain finished product.
(6) to parts surface deposited coatings, described coating comprises B:12.0��14.0at% by the chemical composition of atomic percent, C:36.0��44.0at%, V:8.0��12.0at%, Cr:10.0��14.0at%, Nb:5.0��6.0at%, H:6.0��13.0at%.
CN201511022918.7A 2015-12-30 2015-12-30 Preparation method for automobile charging turbine Pending CN105618679A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201511022918.7A CN105618679A (en) 2015-12-30 2015-12-30 Preparation method for automobile charging turbine

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Application Number Priority Date Filing Date Title
CN201511022918.7A CN105618679A (en) 2015-12-30 2015-12-30 Preparation method for automobile charging turbine
PCT/CN2016/107878 WO2017114079A1 (en) 2015-12-30 2016-11-30 Method for preparing automobile supercharging turbine

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CN105618679A true CN105618679A (en) 2016-06-01

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WO2017114079A1 (en) * 2015-12-30 2017-07-06 张建勋 Method for preparing automobile supercharging turbine
WO2017114070A1 (en) * 2015-12-29 2017-07-06 张建勋 Environmentally friendly preparation method for automobile booster turbine
WO2017114068A1 (en) * 2015-12-29 2017-07-06 张建勋 Environmentally friendly method for preparing automobile engine blade
WO2017114066A1 (en) * 2015-12-29 2017-07-06 张建勋 Environmentally friendly method for preparing automobile engine shell
WO2017114065A1 (en) * 2015-12-29 2017-07-06 张建勋 Method for preparing environmentally friendly casting material
WO2017114067A1 (en) * 2015-12-29 2017-07-06 张建勋 Automobile engine blade
WO2017114069A1 (en) * 2015-12-29 2017-07-06 张建勋 Automobile supercharging turbine
WO2017114071A1 (en) * 2015-12-29 2017-07-06 张建勋 Method for preparing breathable moulding shell
WO2017114078A1 (en) * 2015-12-30 2017-07-06 张建勋 Method for preparing engine component
WO2017114064A1 (en) * 2015-12-29 2017-07-06 张建勋 Method for preparing environmentally friendly fine casting mould shell
CN111906247A (en) * 2020-07-01 2020-11-10 无锡范尼韦尔工程有限公司 Preparation process of supercharger turbine for national six-emission heavy diesel engine

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Publication number Priority date Publication date Assignee Title
WO2017114069A1 (en) * 2015-12-29 2017-07-06 张建勋 Automobile supercharging turbine
WO2017114070A1 (en) * 2015-12-29 2017-07-06 张建勋 Environmentally friendly preparation method for automobile booster turbine
WO2017114068A1 (en) * 2015-12-29 2017-07-06 张建勋 Environmentally friendly method for preparing automobile engine blade
WO2017114066A1 (en) * 2015-12-29 2017-07-06 张建勋 Environmentally friendly method for preparing automobile engine shell
WO2017114065A1 (en) * 2015-12-29 2017-07-06 张建勋 Method for preparing environmentally friendly casting material
WO2017114067A1 (en) * 2015-12-29 2017-07-06 张建勋 Automobile engine blade
WO2017114071A1 (en) * 2015-12-29 2017-07-06 张建勋 Method for preparing breathable moulding shell
WO2017114064A1 (en) * 2015-12-29 2017-07-06 张建勋 Method for preparing environmentally friendly fine casting mould shell
WO2017114079A1 (en) * 2015-12-30 2017-07-06 张建勋 Method for preparing automobile supercharging turbine
WO2017114078A1 (en) * 2015-12-30 2017-07-06 张建勋 Method for preparing engine component
CN111906247A (en) * 2020-07-01 2020-11-10 无锡范尼韦尔工程有限公司 Preparation process of supercharger turbine for national six-emission heavy diesel engine

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