CN104550725A - Method for investment casting automobile heat-resistant steel exhaust manifold - Google Patents
Method for investment casting automobile heat-resistant steel exhaust manifold Download PDFInfo
- Publication number
- CN104550725A CN104550725A CN201310516285.XA CN201310516285A CN104550725A CN 104550725 A CN104550725 A CN 104550725A CN 201310516285 A CN201310516285 A CN 201310516285A CN 104550725 A CN104550725 A CN 104550725A
- Authority
- CN
- China
- Prior art keywords
- casting
- wax
- temperature
- coating
- exhaust manifold
- 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
Links
- 238000000034 method Methods 0.000 title claims abstract description 27
- 229910000831 Steel Inorganic materials 0.000 title claims abstract description 17
- 239000010959 steel Substances 0.000 title claims abstract description 17
- 238000005495 investment casting Methods 0.000 title claims abstract description 15
- 239000011248 coating agent Substances 0.000 claims abstract description 16
- 238000000576 coating method Methods 0.000 claims abstract description 16
- 238000005266 casting Methods 0.000 claims abstract description 15
- 239000011162 core material Substances 0.000 claims abstract description 11
- 239000004576 sand Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 10
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000004202 carbamide Substances 0.000 claims abstract description 4
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 18
- 239000010410 layer Substances 0.000 claims description 9
- 239000000843 powder Substances 0.000 claims description 9
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 claims description 6
- 229910052863 mullite Inorganic materials 0.000 claims description 6
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 claims description 3
- QCWXUUIWCKQGHC-UHFFFAOYSA-N Zirconium Chemical compound [Zr] QCWXUUIWCKQGHC-UHFFFAOYSA-N 0.000 claims description 3
- 238000005275 alloying Methods 0.000 claims description 3
- 238000009835 boiling Methods 0.000 claims description 3
- 210000000988 bone and bone Anatomy 0.000 claims description 3
- 239000002826 coolant Substances 0.000 claims description 3
- 238000005238 degreasing Methods 0.000 claims description 3
- 238000009415 formwork Methods 0.000 claims description 3
- 230000004927 fusion Effects 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 230000010358 mechanical oscillation Effects 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 239000000203 mixture Substances 0.000 claims description 3
- 238000001228 spectrum Methods 0.000 claims description 3
- 238000003756 stirring Methods 0.000 claims description 3
- 239000000126 substance Substances 0.000 claims description 3
- 239000002344 surface layer Substances 0.000 claims description 3
- 230000007704 transition Effects 0.000 claims description 3
- 229910052726 zirconium Inorganic materials 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 238000003723 Smelting Methods 0.000 abstract description 2
- 239000000956 alloy Substances 0.000 abstract description 2
- 229910045601 alloy Inorganic materials 0.000 abstract description 2
- 238000004140 cleaning Methods 0.000 abstract description 2
- 230000007547 defect Effects 0.000 abstract description 2
- 239000002994 raw material Substances 0.000 abstract description 2
- 239000012738 dissolution medium Substances 0.000 abstract 1
- 238000001035 drying Methods 0.000 abstract 1
- 239000004519 grease Substances 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 3
- 238000003754 machining Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C9/00—Moulds or cores; Moulding processes
- B22C9/02—Sand moulds or like moulds for shaped castings
- B22C9/04—Use of lost patterns
-
- 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
- B22C9/24—Moulds for peculiarly-shaped castings for hollow articles
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Molds, Cores, And Manufacturing Methods Thereof (AREA)
Abstract
The invention discloses a method for investment casting an automobile heat-resistant steel exhaust manifold. The method disclosed by the invention comprises the following steps: manufacturing a core by taking urea as a mould core material and water as a dissolution medium through a free casting and forming method, then, removing oil and grease from a module, and completely drying and hardening a coating and a sanding layer so as to obtain a mould shell; and then, roasting the mould shell, smelting alloy, casting, shaking out sand and cleaning to obtain a fusible mould casting. By means of the method disclosed by the invention, the problems of being more in process and high in workload in the prior art are overcome; the production efficiency is improved; the quality defect due to the common problems of the automobile engine heat-resistant steel exhaust manifold casting, such as local shrinkage porosity and shrinkage cavity, is avoided; the utilization rate of raw materials is high; the production cost is reduced; the cast finished product is precise in size and unnecessary to machine; and thus, the quality of the casting is effectively ensured.
Description
Technical field
The invention belongs to casting technology field, be specifically related to a kind of heat-resistant steel exhaust manifold for automobile investment casting method.
Background technology
The model casting of automobile engine heat-resistant steel exhaust manifold roughly comprises manufacture wax-pattern, manufactures the steps such as shell, alloy smelting, cast, knockout, cleaning.In current melt film casting technique, the heat-resistant steel exhaust manifold for automobile investment-casting finished product made there will be local shrinkage porosite phenomenon, and not only casting process is more, affects production capacity, and the precision of foundry goods cannot effectively be ensured simultaneously, and percent defective is higher.
Summary of the invention
In order to overcome the above-mentioned technical problem that prior art field exists, the object of the invention is to, a kind of heat-resistant steel exhaust manifold for automobile investment casting method is provided, can directly cast out heat-resistant steel exhaust manifold for automobile investment-casting, bolt precision is accurate, and processing technology thereof is simple.
Heat-resistant steel exhaust manifold for automobile investment casting method provided by the invention, comprises the following steps:
(1) take urea as core material, water is dissolve medium; Fusion temperature 100-150 DEG C, adopt free casting forming method to make core under mold temperature 50-80 DEG C of conditions, core adopts K501 wax, change wax temperature 80-100 DEG C; Penetrate wax temperature 50-70 DEG C; Penetrate wax pressure 20Kg/cm2-60Kg/cm2; Dwell time is 20S-80S; Coolant water temperature is make wax-pattern under 5-25 DEG C of conditions; Use laminar flatiron, the connecting portion of wax-pattern is melted, make that wax-pattern is welded together is assembled into module;
(2) oil removing of module and degreasing: be coated with coating and stucco on module, before being coated with coating, first stirs coating; After coating coats, carry out stucco; Wherein layer of sand is three layers, is surface layer respectively: 320 order zirconium powders joined by Ludox, dry 5-10 hours; Transition zone: 320 order mullite powders joined by Ludox, dry 5-10 hours; Back-up coat: 320 order mullite powders joined by Ludox, dry 10-15 hours; Obtain shell blank; Molten mistake fusible pattern: after coating and stucco layer bone dry also harden, melt dewax module with hot-water process, obtain shell; Roasting shell: the shell after dewaxing is put into heating furnace, heats to 1000-1200 DEG C, be incubated 0.5-2 hours; High-performance shell is obtained by said procedure;
(3) adopt intermediate frequency furnace melting, before cast, spectrum on line analyzes alloying component, guarantees to obtain the qualified cast product of composition;
(4) pouring temperature 1580 DEG C, formwork preheat temperature 1000 DEG C; The duration of pouring 10S;
(5) mode adopting mechanical oscillation sand removal and chemical soda boiling sand removal to combine also is cleared up.
Heat-resistant steel exhaust manifold for automobile investment casting method provided by the invention, its beneficial effect is, overcomes operation in prior art process more, the problem that workload is large, improves production efficiency; Avoid the mass defect because the problems such as automobile engine heat-resistant steel exhaust manifold foundry goods local Shinkage and dispersed porosity cause, utilization rate of raw materials is high, reduces production cost; The finished product melt film casting dimension cast out is accurate, without the need to machining, effectively ensure that casting quality.
Detailed description of the invention
Below in conjunction with an embodiment, heat-resistant steel exhaust manifold for automobile investment casting method provided by the invention is described in detail.
Embodiment
The heat-resistant steel exhaust manifold for automobile investment casting method of the present embodiment, comprises the following steps:
(1) take urea as core material, water is dissolve medium; Fusion temperature 130 DEG C; Adopt free casting forming method to make core under mold temperature 65 DEG C of conditions, core adopts K501 wax, change wax temperature 90 DEG C; Penetrate wax temperature 60 C; Penetrate wax pressure 40Kg/cm2; Dwell time: 45S; Coolant water temperature: make wax-pattern under 15 DEG C of conditions; Use laminar flatiron, the connecting portion of wax-pattern is melted, make that wax-pattern is welded together is assembled into module;
(2) oil removing of module and degreasing: be coated with coating and stucco on module, before being coated with coating, first stirs coating; After coating coats, carry out stucco; Wherein layer of sand is three layers, is surface layer respectively: 320 order zirconium powders joined by Ludox, dry 8 hours; Transition zone: 320 order mullite powders joined by Ludox, dry 10 hours; Back-up coat: 320 order mullite powders joined by Ludox, dry 13 hours; Obtain shell blank; Molten mistake fusible pattern: after coating and stucco layer bone dry also harden, melt dewax module with hot-water process, obtain shell; Roasting shell: the shell after dewaxing is put into heating furnace, heats to 1010 DEG C, be incubated 1 hour; High-performance shell is obtained by said procedure;
(3) adopt intermediate frequency furnace melting, before cast, spectrum on line analyzes alloying component, guarantees to obtain the qualified cast product of composition;
(4) pouring temperature 1580 DEG C, formwork preheat temperature 1000 DEG C; The duration of pouring 10S;
(5) mode adopting mechanical oscillation sand removal and chemical soda boiling sand removal to combine also is cleared up.
Heat-resistant steel exhaust manifold for automobile investment casting method, can directly cast out satisfactory investment-casting, and without the need to machining, operation is simple, and the heat-resistant steel exhaust manifold for automobile investment-casting size of the finished product cast out is accurate, effectively ensure that casting quality.
Claims (1)
1. a heat-resistant steel exhaust manifold for automobile investment casting method, is characterized in that, said method comprising the steps of:
(1) take urea as core material, water is dissolve medium; Fusion temperature 100-150 DEG C; Adopt free casting forming method to make core under mold temperature 50-80 DEG C of conditions, core adopts K501 wax, change wax temperature 80-100 DEG C; Penetrate wax temperature 50-70 DEG C; Penetrate wax pressure 20Kg/cm2-60Kg/cm2; Dwell time: 20S-80S; Coolant water temperature: make wax-pattern under 5-25 DEG C of conditions; Use laminar flatiron, the connecting portion of wax-pattern is melted, make that wax-pattern is welded together is assembled into module;
(2) oil removing of module and degreasing: be coated with coating and stucco on module, before being coated with coating, first stirs coating; After coating coats, carry out stucco; Wherein layer of sand is three layers, is surface layer respectively: 320 order zirconium powders joined by Ludox, dry 5-10 hours; Transition zone: 320 order mullite powders joined by Ludox, dry 5-10 hours; Back-up coat: 320 order mullite powders joined by Ludox, dry 10-15 hours; Obtain shell blank; Molten mistake fusible pattern: after coating and stucco layer bone dry also harden, melt dewax module with hot-water process, obtain shell; Roasting shell: the shell after dewaxing is put into heating furnace, heats to 1000-1200 DEG C, be incubated 0.5-2 hours; High-performance shell is obtained by said procedure;
(3) adopt intermediate frequency furnace melting, before cast, spectrum on line analyzes alloying component, guarantees to obtain the qualified cast product of composition;
(4) pouring temperature 1580 DEG C, formwork preheat temperature 1000 DEG C; The duration of pouring 10S;
(5) mode adopting mechanical oscillation sand removal and chemical soda boiling sand removal to combine also is cleared up.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310516285.XA CN104550725A (en) | 2013-10-29 | 2013-10-29 | Method for investment casting automobile heat-resistant steel exhaust manifold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310516285.XA CN104550725A (en) | 2013-10-29 | 2013-10-29 | Method for investment casting automobile heat-resistant steel exhaust manifold |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104550725A true CN104550725A (en) | 2015-04-29 |
Family
ID=53068388
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310516285.XA Pending CN104550725A (en) | 2013-10-29 | 2013-10-29 | Method for investment casting automobile heat-resistant steel exhaust manifold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104550725A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499505A (en) * | 2016-02-17 | 2016-04-20 | 屏山县天成精密铸造有限责任公司 | Manufacturing method for precision casting mould |
| CN106825401A (en) * | 2017-02-22 | 2017-06-13 | 江苏汤臣汽车零部件有限公司 | A kind of truck Retarder impeller wax-pattern shell side method |
| CN110842139A (en) * | 2019-12-15 | 2020-02-28 | 泰州鑫宇精工股份有限公司 | Wax liquid filling mold for hot end mixer of automobile engine exhaust system |
| CN111112549A (en) * | 2019-02-19 | 2020-05-08 | 大成（常熟）机械有限公司 | Precision casting production process of flow divider and flow divider |
-
2013
- 2013-10-29 CN CN201310516285.XA patent/CN104550725A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105499505A (en) * | 2016-02-17 | 2016-04-20 | 屏山县天成精密铸造有限责任公司 | Manufacturing method for precision casting mould |
| CN106825401A (en) * | 2017-02-22 | 2017-06-13 | 江苏汤臣汽车零部件有限公司 | A kind of truck Retarder impeller wax-pattern shell side method |
| CN111112549A (en) * | 2019-02-19 | 2020-05-08 | 大成（常熟）机械有限公司 | Precision casting production process of flow divider and flow divider |
| CN110842139A (en) * | 2019-12-15 | 2020-02-28 | 泰州鑫宇精工股份有限公司 | Wax liquid filling mold for hot end mixer of automobile engine exhaust system |
| CN110842139B (en) * | 2019-12-15 | 2024-05-14 | 泰州鑫宇精工股份有限公司 | Wax liquid filling die of hot end mixer of automobile engine exhaust system |
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| C06 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20150429 |