CN108202131A - The casting technique of turbocharger housing - Google Patents
The casting technique of turbocharger housing Download PDFInfo
- Publication number
- CN108202131A CN108202131A CN201611166028.8A CN201611166028A CN108202131A CN 108202131 A CN108202131 A CN 108202131A CN 201611166028 A CN201611166028 A CN 201611166028A CN 108202131 A CN108202131 A CN 108202131A
- Authority
- CN
- China
- Prior art keywords
- sand
- casting
- molten iron
- nodularization
- turbocharger housing
- 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.)
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/22—Moulds for peculiarly-shaped castings
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/02—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by additives for special purposes, e.g. indicators, breakdown additives
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C1/00—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds
- B22C1/16—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents
- B22C1/20—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents
- B22C1/22—Compositions of refractory mould or core materials; Grain structures thereof; Chemical or physical features in the formation or manufacture of moulds characterised by the use of binding agents; Mixtures of binding agents of organic agents of resins or rosins
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D1/00—Treatment of fused masses in the ladle or the supply runners before casting
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01D—NON-POSITIVE DISPLACEMENT MACHINES OR ENGINES, e.g. STEAM TURBINES
- F01D25/00—Component parts, details, or accessories, not provided for in, or of interest apart from, other groups
- F01D25/24—Casings; Casing parts, e.g. diaphragms, casing fastenings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F05—INDEXING SCHEMES RELATING TO ENGINES OR PUMPS IN VARIOUS SUBCLASSES OF CLASSES F01-F04
- F05D—INDEXING SCHEME FOR ASPECTS RELATING TO NON-POSITIVE-DISPLACEMENT MACHINES OR ENGINES, GAS-TURBINES OR JET-PROPULSION PLANTS
- F05D2220/00—Application
- F05D2220/40—Application in turbochargers
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The present invention relates to a kind of casting techniques of turbocharger housing, it is characterised in that includes the following steps：1）Prepare sand core and sand mold；2）Assembling, drying；3）Melting and spheroidising；5）Cast；6) cleaning is examined.The present invention reduces the generation of the casting flaws such as shrinkage cavity and porosity, burning into sand and bubble, improves the yield rate of casting and the mechanical property of casting, reduce casting cost by the improvement to casting sand and casting technique.
Description
Technical field
The present invention relates to a kind of casting method, more particularly, to a kind of casting technique of turbocharger housing.
Background technology
Turbocharger housing is the important pressurized part in turbocharger, structure, mechanical performance and service life
It is more demanding.The shape and structure of turbocharger housing is complicated, and surface roughness inner cavity requires to reach 6.3 μm, and outer surface reaches
To 12.5 μm, generally use casting and forming, at present, the casting technique of turbocharger housing mainly use common tide mould sand moulder
Skill, since casting structure wall thickness great disparity is larger, easy cold shut at thin-walled also easily generates shrinkage cavity and porosity and bubble etc. at heavy wall
Defect, casting technique yield rate is low, general only 45% ~ 55% or so, wherein, due to the sand molds such as formative technology and tide mould sand intensity
The defects of casting burning into sand caused by defect, is serious, this rejection rate accounts for total more than 40% rejection rate of casting, so as to which life be significantly increased
Produce cost.
Invention content
The applicant is directed to the problem of above-mentioned, has carried out Improvement, provides a kind of casting technique of turbocharger housing,
By the improvement to casting sand and technique, the generation of the casting flaws such as shrinkage cavity and porosity, burning into sand and bubble is reduced, improves casting
Yield rate and casting mechanical property, reduce casting cost.
In order to solve the above-mentioned technical problem, the present invention adopts the following technical scheme that：
A kind of casting technique of turbocharger housing, includes the following steps：
1）Prepare sand core and sand mold：According to the shape of turbocharger housing inner flow passage, size, it is sintered and is made with high intensity precoated sand
Standby sand core；According to turbocharger housing outer shape profile, sand mold is prepared using high intensity precoated sand sintering；The high intensity is covered
Film sand by roughing sand, alumina fibre, solid thermoplastics phenolic resin, methenamine, calcium stearate, silane coupling agent prepare and
Into the weight proportion of each component is：100 parts of roughing sand, 1 ~ 3 part of alumina fibre, 2 ~ 3 parts of solid thermoplastics phenolic resin, Wu Luo
0.3 ~ 0.5 part of tropine, 0.02 ~ 0.1 part of calcium stearate, 0.01 ~ 0.05 part of silane coupling agent；The granularity of the roughing sand is 60
~120 mesh；
2）Assembling, drying：Sand core and sand mold are fitted together, it is with glue bonding and to be cast after drying；
3）Melting and spheroidising：1.5T/h intermediate frequency furnace melting pig iron Q10 are selected, molten iron is poured into out of stove at nodularization packet nodularization
Reason, molten iron treatment temperature are 1500 ~ 1530 DEG C, and molten iron treating capacity 500kg/ packets, nodulizer selects rare earth magnesium nodularizer；It breeds
75Si-Ba, 3 ~ 8mm of granularity are selected in agent；Nodulizer is placed in the dykes and dams of nodularization packet, and the inovulant of half amount is covered in nodulizer
On, and one layer of coverture silicon steel sheet is covered on it, molten iron adds in two times, the nodularization time >=45s；
4）Cast：Pour into a mould the cast of 3 200kg casting ladles of time-division, remaining inovulant is separately added into 3 casting ladles, and molten iron is from nodularization packet
It adds in casting ladle and makees late inoculation；Measure molten iron 1440 ~ 1430 DEG C of pouring temperature of starting, last case pouring temperature >=1360 DEG C；Nodularization
And duration of pouring control is within 8 minutes；
5) cleaning is examined：The riser for pouring the casting being poured in is removed, the sand that cleaning casting glues in appearance is put in storage castings examination.
Further：
The weight proportion of each component of the high intensity precoated sand is：100 parts of roughing sand, 2 parts of alumina fibre, solid thermoplastics phenol
2.5 parts of urea formaldehyde, 0.4 part of methenamine, 0.06 part of calcium stearate, silane coupling agent 0.03.
In high intensity precoated sand each component, solid thermoplastics phenolic resin is binding agent, methenamine in powdered, as
Curing agent, calcium stearate is in powdered, and as lubricant, coupling agent uses silane coupling agent, and alumina fibre is as fire resisting
Fiber is used to enhance the structural strength and stability of sand core and sand mold.Since sand core and sand mold are raw materials used for precoated sand, get angry
Measure relatively low, sand core and sand mold thickness are ensureing that casting molding accomplishes very thin as possible, increase lacing wire at thin-walled, increase
Reinforcement degree, so as to control the sand using amount of sand core and sand mold in the case where increasing intensity（Total gas forming amount is few as possible）, make finally to cast
Part finished product stomata, cinder hole etc. are reduced because of the defects of gas causes.Precoated sand quality is whether casting surfaces externally and internally roughness is up to standard
Key, qualified precoated sand is injected by core making machine in mold, mold is heated by electrothermal tube, within the regular hour,
The precoated sand for making in a mold, which is heated, is cured as the shape of mold, and sand core and sand mold is made to have certain cured layer（Ensure sand core
And the intensity that sand mold is certain）, it is required for being repaired with alcohol radical mending paste in die joint and surface porosity position smooth.Transportational process
It is middle to pay attention to protection, bump injury is prevented, reduces broken sand remaining to the greatest extent, and cause casting burning into sand.During melting nodularization, select
1.5T/h intermediate frequency furnace meltings, select nonyl occasion pig iron Q10, and chemical composition is：C:4.2%、Si:1.0%、Mn:0.20%、P:
0.06%、S:0.02%, the control of base iron alloying component：C:3.75~3.85%, Si:1.4~1.5%, Mn: ≤ 0.20%、P:
≤0.06%、S:≤ 0.02%, Mg0.03~0.05% controls base iron chemical composition using high-quality raw material, is to ensure casting
Qualified basic of mechanical performance, metallographic structure.In the case where ensureing that molten iron obtains abundant quiescence in high temperature, smelting temperature is as far as possible
It is low, prevent melting loss of elements.The sand core sand mold prepared is compressed during cast, ensures the type lift case that do not rise during pouring cast part, due to iron
Water pouring box number is more, it is ensured that nodularization is not failed, therefore pours into a mould 3 200kg casting ladles cast of time-division, and the duration of pouring is strictly controlled
Within 8 minutes, ensure that castings material performance is stablized.
The technical effects of the invention are that：
A kind of casting technique of turbocharger housing disclosed by the invention, by the improvement to casting sand and casting technique, subtracts
The generation of the casting flaws such as few shrinkage cavity and porosity, burning into sand and bubble, improves the yield rate of casting and the mechanical property of casting, reduces
Casting cost.
Specific embodiment
It is described in further detail With reference to embodiment.
Embodiment 1,
The casting technique step of turbocharger housing is as follows：
1）Prepare sand core and sand mold：According to the shape of turbocharger housing inner flow passage, size, it is sintered and is made with high intensity precoated sand
Standby sand core；According to turbocharger housing outer shape profile, sand mold is prepared using high intensity precoated sand sintering；The high intensity is covered
Film sand by roughing sand, alumina fibre, solid thermoplastics phenolic resin, methenamine, calcium stearate, silane coupling agent prepare and
Into the weight proportion of each component is：100 parts of roughing sand, 2 parts of alumina fibre, 2.5 parts of solid thermoplastics phenolic resin, Wu Luotuo
0.4 part of product, 0.06 part of calcium stearate, silane coupling agent 0.03；The granularity of the roughing sand is 60~120 mesh；
2）Assembling, drying：Sand core and sand mold are fitted together, it is with glue bonding and to be cast after drying；
3）Melting and spheroidising：1.5T/h intermediate frequency furnace melting pig iron Q10 are selected, molten iron is poured into out of stove at nodularization packet nodularization
Reason, molten iron treatment temperature are 1500 ~ 1530 DEG C, and molten iron treating capacity 500kg/ packets, nodulizer selects rare earth magnesium nodularizer；It breeds
75Si-Ba, 3 ~ 8mm of granularity are selected in agent；Nodulizer is placed in the dykes and dams of nodularization packet, and the inovulant of half amount is covered in nodulizer
On, and one layer of coverture silicon steel sheet is covered on it, molten iron adds in two times, the nodularization time >=45s；
4）Cast：Pour into a mould the cast of 3 200kg casting ladles of time-division, remaining inovulant is separately added into 3 casting ladles, and molten iron is from nodularization packet
It adds in casting ladle and makees late inoculation；Measure molten iron 1440 ~ 1430 DEG C of pouring temperature of starting, last case pouring temperature >=1360 DEG C；Nodularization
And duration of pouring control is within 8 minutes；
5) cleaning is examined：The riser for pouring the casting being poured in is removed, the sand that cleaning casting glues in appearance is put in storage castings examination.
Embodiment 2,
The casting technique step of turbocharger housing is as follows：
1）Prepare sand core and sand mold：According to the shape of turbocharger housing inner flow passage, size, it is sintered and is made with high intensity precoated sand
Standby sand core；According to turbocharger housing outer shape profile, sand mold is prepared using high intensity precoated sand sintering；The high intensity is covered
Film sand by roughing sand, alumina fibre, solid thermoplastics phenolic resin, methenamine, calcium stearate, silane coupling agent prepare and
Into the weight proportion of each component is：100 parts of roughing sand, 3 parts of alumina fibre, 2 parts of solid thermoplastics phenolic resin, methenamine
0.3 part, 0.03 part of calcium stearate, 0.02 part of silane coupling agent；The granularity of the roughing sand is 60~120 mesh；
2）Assembling, drying：Sand core and sand mold are fitted together, it is with glue bonding and to be cast after drying；
3）Melting and spheroidising：1.5T/h intermediate frequency furnace melting pig iron Q10 are selected, molten iron is poured into out of stove at nodularization packet nodularization
Reason, molten iron treatment temperature are 1500 ~ 1530 DEG C, and molten iron treating capacity 500kg/ packets, nodulizer selects rare earth magnesium nodularizer；It breeds
75Si-Ba, 3 ~ 8mm of granularity are selected in agent；Nodulizer is placed in the dykes and dams of nodularization packet, and the inovulant of half amount is covered in nodulizer
On, and one layer of coverture silicon steel sheet is covered on it, molten iron adds in two times, the nodularization time >=45s；
4）Cast：Pour into a mould the cast of 3 200kg casting ladles of time-division, remaining inovulant is separately added into 3 casting ladles, and molten iron is from nodularization packet
It adds in casting ladle and makees late inoculation；Measure molten iron 1440 ~ 1430 DEG C of pouring temperature of starting, last case pouring temperature >=1360 DEG C；Nodularization
And duration of pouring control is within 8 minutes；
5) cleaning is examined：The riser for pouring the casting being poured in is removed, the sand that cleaning casting glues in appearance is put in storage castings examination.
Embodiment 3,
The casting technique step of turbocharger housing is as follows：
1）Prepare sand core and sand mold：According to the shape of turbocharger housing inner flow passage, size, it is sintered and is made with high intensity precoated sand
Standby sand core；According to turbocharger housing outer shape profile, sand mold is prepared using high intensity precoated sand sintering；The high intensity is covered
Film sand by roughing sand, alumina fibre, solid thermoplastics phenolic resin, methenamine, calcium stearate, silane coupling agent prepare and
Into the weight proportion of each component is：100 parts of roughing sand, 1 part of alumina fibre, 3 parts of solid thermoplastics phenolic resin, methenamine
0.5 part, 0.09 part of calcium stearate, 0.05 part of silane coupling agent；The granularity of the roughing sand is 60~120 mesh；
2）Assembling, drying：Sand core and sand mold are fitted together, it is with glue bonding and to be cast after drying；
3）Melting and spheroidising：1.5T/h intermediate frequency furnace melting pig iron Q10 are selected, molten iron is poured into out of stove at nodularization packet nodularization
Reason, molten iron treatment temperature are 1500 ~ 1530 DEG C, and molten iron treating capacity 500kg/ packets, nodulizer selects rare earth magnesium nodularizer；It breeds
75Si-Ba, 3 ~ 8mm of granularity are selected in agent；Nodulizer is placed in the dykes and dams of nodularization packet, and the inovulant of half amount is covered in nodulizer
On, and one layer of coverture silicon steel sheet is covered on it, molten iron adds in two times, the nodularization time >=45s；
4）Cast：Pour into a mould the cast of 3 200kg casting ladles of time-division, remaining inovulant is separately added into 3 casting ladles, and molten iron is from nodularization packet
It adds in casting ladle and makees late inoculation；Measure molten iron 1440 ~ 1430 DEG C of pouring temperature of starting, last case pouring temperature >=1360 DEG C；Nodularization
And duration of pouring control is within 8 minutes；
5) cleaning is examined：The riser for pouring the casting being poured in is removed, the sand that cleaning casting glues in appearance is put in storage castings examination.
Claims (2)
1. a kind of casting technique of turbocharger housing, it is characterised in that include the following steps：
1）Prepare sand core and sand mold：According to the shape of turbocharger housing inner flow passage, size, it is sintered and is made with high intensity precoated sand
Standby sand core；According to turbocharger housing outer shape profile, sand mold is prepared using high intensity precoated sand sintering；The high intensity is covered
Film sand by roughing sand, alumina fibre, solid thermoplastics phenolic resin, methenamine, calcium stearate, silane coupling agent prepare and
Into the weight proportion of each component is：100 parts of roughing sand, 1 ~ 3 part of alumina fibre, 2 ~ 3 parts of solid thermoplastics phenolic resin, Wu Luo
0.3 ~ 0.5 part of tropine, 0.02 ~ 0.1 part of calcium stearate, 0.01 ~ 0.05 part of silane coupling agent；The granularity of the roughing sand is 60
~120 mesh；
2）Assembling, drying：Sand core and sand mold are fitted together, it is with glue bonding and to be cast after drying；
3）Melting and spheroidising：1.5T/h intermediate frequency furnace melting pig iron Q10 are selected, molten iron is poured into out of stove at nodularization packet nodularization
Reason, molten iron treatment temperature are 1500 ~ 1530 DEG C, and molten iron treating capacity 500kg/ packets, nodulizer selects rare earth magnesium nodularizer；It breeds
75Si-Ba, 3 ~ 8mm of granularity are selected in agent；Nodulizer is placed in the dykes and dams of nodularization packet, and the inovulant of half amount is covered in nodulizer
On, and one layer of coverture silicon steel sheet is covered on it, molten iron adds in two times, the nodularization time >=45s；
4）Cast：Pour into a mould the cast of 3 200kg casting ladles of time-division, remaining inovulant is separately added into 3 casting ladles, and molten iron is from nodularization packet
It adds in casting ladle and makees late inoculation；Measure molten iron 1440 ~ 1430 DEG C of pouring temperature of starting, last case pouring temperature >=1360 DEG C；Nodularization
And duration of pouring control is within 8 minutes；
5) cleaning is examined：The riser for pouring the casting being poured in is removed, the sand that cleaning casting glues in appearance is put in storage castings examination.
2. the casting technique of turbocharger housing described in accordance with the claim 1, it is characterised in that：The high intensity precoated sand
The weight proportion of each component is：100 parts of roughing sand, 2 parts of alumina fibre, 2.5 parts of solid thermoplastics phenolic resin, methenamine
0.4 part, 0.06 part of calcium stearate, silane coupling agent 0.03.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611166028.8A CN108202131A (en) | 2016-12-16 | 2016-12-16 | The casting technique of turbocharger housing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611166028.8A CN108202131A (en) | 2016-12-16 | 2016-12-16 | The casting technique of turbocharger housing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108202131A true CN108202131A (en) | 2018-06-26 |
Family
ID=62602234
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201611166028.8A Withdrawn CN108202131A (en) | 2016-12-16 | 2016-12-16 | The casting technique of turbocharger housing |
Country Status (1)
| Country | Link |
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| CN (1) | CN108202131A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672656A (en) * | 2018-08-08 | 2018-10-19 | 溧阳市新力机械铸造有限公司 | A kind of casting method of turbo blade casting device and turbo blade |
| CN108971425A (en) * | 2018-08-22 | 2018-12-11 | 四川共享铸造有限公司 | A kind of casting method solving the loose class defect of thick-wall nodular iron |
| CN111644574A (en) * | 2020-06-30 | 2020-09-11 | 潍柴动力股份有限公司 | Preparation method of reinforced thin-wall sand core |
| CN112338141A (en) * | 2020-10-26 | 2021-02-09 | 常州中车汽车零部件有限公司 | Semi-cladding mold sand suitable for vertical automatic core setting of automobile intermediate and core assembling process |
| CN112496266A (en) * | 2020-11-04 | 2021-03-16 | 宁波茸发新材料科技有限公司 | Method for eliminating cracks of thin-wall cylinder castings |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108672656A (en) * | 2018-08-08 | 2018-10-19 | 溧阳市新力机械铸造有限公司 | A kind of casting method of turbo blade casting device and turbo blade |
| CN108971425A (en) * | 2018-08-22 | 2018-12-11 | 四川共享铸造有限公司 | A kind of casting method solving the loose class defect of thick-wall nodular iron |
| CN111644574A (en) * | 2020-06-30 | 2020-09-11 | 潍柴动力股份有限公司 | Preparation method of reinforced thin-wall sand core |
| CN112338141A (en) * | 2020-10-26 | 2021-02-09 | 常州中车汽车零部件有限公司 | Semi-cladding mold sand suitable for vertical automatic core setting of automobile intermediate and core assembling process |
| CN112496266A (en) * | 2020-11-04 | 2021-03-16 | 宁波茸发新材料科技有限公司 | Method for eliminating cracks of thin-wall cylinder castings |
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Application publication date: 20180626 |