CN1067928C - Thin wall alloy product immersion crystalline forming method - Google Patents
Thin wall alloy product immersion crystalline forming method Download PDFInfo
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- CN1067928C CN1067928C CN97118729A CN97118729A CN1067928C CN 1067928 C CN1067928 C CN 1067928C CN 97118729 A CN97118729 A CN 97118729A CN 97118729 A CN97118729 A CN 97118729A CN 1067928 C CN1067928 C CN 1067928C
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- alloy
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- immersion
- thin wall
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- 229910045601 alloy Inorganic materials 0.000 title claims abstract description 39
- 239000000956 alloy Substances 0.000 title claims abstract description 39
- 238000000034 method Methods 0.000 title claims abstract description 18
- 238000007654 immersion Methods 0.000 title claims description 12
- 238000005266 casting Methods 0.000 claims abstract description 36
- 239000004576 sand Substances 0.000 claims abstract description 9
- 230000006698 induction Effects 0.000 claims abstract description 7
- 238000001816 cooling Methods 0.000 claims abstract description 6
- 238000002425 crystallisation Methods 0.000 claims abstract description 6
- 230000008025 crystallization Effects 0.000 claims abstract description 6
- 239000007788 liquid Substances 0.000 claims description 9
- 238000002360 preparation method Methods 0.000 claims description 6
- 238000007528 sand casting Methods 0.000 claims description 3
- 239000007790 solid phase Substances 0.000 claims description 3
- 239000000919 ceramic Substances 0.000 claims description 2
- 230000015271 coagulation Effects 0.000 claims 1
- 238000005345 coagulation Methods 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000007598 dipping method Methods 0.000 abstract 1
- 239000007791 liquid phase Substances 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 239000007787 solid Substances 0.000 abstract 1
- 238000007906 compression Methods 0.000 description 5
- 230000006835 compression Effects 0.000 description 5
- 229910000906 Bronze Inorganic materials 0.000 description 4
- ATJFFYVFTNAWJD-UHFFFAOYSA-N Tin Chemical compound [Sn] ATJFFYVFTNAWJD-UHFFFAOYSA-N 0.000 description 4
- 239000002893 slag Substances 0.000 description 4
- 238000007711 solidification Methods 0.000 description 4
- 230000008023 solidification Effects 0.000 description 4
- 229910000851 Alloy steel Inorganic materials 0.000 description 3
- 239000013078 crystal Substances 0.000 description 3
- 238000004512 die casting Methods 0.000 description 3
- 238000000465 moulding Methods 0.000 description 3
- 239000010974 bronze Substances 0.000 description 2
- 238000009750 centrifugal casting Methods 0.000 description 2
- KUNSUQLRTQLHQQ-UHFFFAOYSA-N copper tin Chemical compound [Cu].[Sn] KUNSUQLRTQLHQQ-UHFFFAOYSA-N 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 238000007710 freezing Methods 0.000 description 2
- 239000011148 porous material Substances 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 210000001787 dendrite Anatomy 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005495 investment casting Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000005058 metal casting Methods 0.000 description 1
- 229910021652 non-ferrous alloy Inorganic materials 0.000 description 1
- 238000005204 segregation Methods 0.000 description 1
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Abstract
The present invention relates to a new special casting method for preparing thin-walled alloy products. The method comprises the following specific steps: firstly, melting alloy for casing in an induction furnace; secondly, deoxidizing the melted alloy, slagging, and then lowering temperature below that of a liquid phase line to make the melted alloy in a liquid-solid coexistent state; thirdly, vertically dipping an upper mould or a lower mould of a calcined or stove-dried mould into a furnace cavity, staying for a certain time to implement crystallization, and then slowly drawing the mould from the furnace cavity; fourthly, cooling, removing sand, and removing redundant alloy to obtain a required casting part. The present invention is suitable for manufacturing thin-walled special-shaped pipes, stereo artworks, embossed artworks, thin-walled moulds, etc.
Description
The invention belongs to casting technology field, particularly a kind of new method of thin wall alloy product casting.
Ordinary sand casting, owing to be subjected to formative method, the type form of filling of molten metal and the influence of the aspects such as curing condition in sand mold will obtain the complex-shaped and surperficial thin-section casting that fine pattern arranged and be unusual difficulty.Model casting can be cast the thin-section casting that shape is comparatively complicated, there are fine pattern and literal in the surface, and minimum wall thickness (MINI W.) can reach 0.5mm, is applicable to the foundry goods of the various alloys of casting, and still, production preparation and technical process are all very complicated.Compression casting can be cast the thin-section casting that shape is comparatively complicated, there are fine pattern or literal in the surface, minimum wall thickness (MINI W.) can reach 0.3mm, though the technical process of compression casting is comparatively simple, but the die casting equipment investment is high, compression mod is made complicated, and foundry goods easily produces pore, and some indent part of die casting, high-melting-point alloy foundry goods are also relatively more difficult, at present, more than based on non-ferrous alloy.Centrifugal casting also can be produced thin-section casting, can be when making hollow casting without core, do not have running gate system and runner system, almost can be used for producing all alloy-steel castings, still, production preparation complexity, producing irregularly-shaped castings has certain limitation, easily forms gravity segregation in the foundry goods, and the foundry goods bore area is more coarse, gathering has slag, and its size is difficult for correct control.Above-described ordinary sand casting, model casting, compression casting and centrifugal casting remove compression casting and can reduce pouring temperature sometimes, even available semi liquid state alloy are carried out outside the die casting, all the other all are to pour into a mould under the complete molten condition of alloy, and wall thickness is thin more, and pouring temperature is high more.
The objective of the invention is to provide a kind of the mo(u)ld top half of casting mold or mo(u)ld bottom half or core directly immersed liquid---in the semi liquid state alloy of solid phase coexistence, make alloy immersing the moulding of mo(U)ld face crystallization and freezing, obtain comparatively even, the complex-shaped and even surperficial new Special Processes of Metal Castings method that the thin-section casting of fine pattern or literal is arranged of wall thickness.
The objective of the invention is to realize by preparation casting mold → oven dry or roasting → molten alloy → immersion crystalline forming → cooling sand removal → remove redundance alloy.Its concrete operations are the heat fused of the alloy that is used for casting at induction furnace, after the deoxidation slag hitting, cool the temperature to liquidus temperature t
LBelow, solidus temperature t
sMore than a certain temperature, begun crystallization this moment, is liquid---the state of solid phase coexistence, and being under the effect of rotating excitation field; To dry then or roasting after the mo(u)ld top half of casting mold or mo(u)ld bottom half or core vertically immerse in the burner hearth, liquid level is exposed in the upper end of casting mold, so that air scavenge; Because mold temperature is low, crystallization is very fast in its surface beginning, and outwards advances gradually, when solidification layer reaches the thickness that needs, lentamente it is proposed burner hearth, sand removal after cooling, removes the redundance alloy, promptly obtains required thin wall alloy foundry goods.Adopt the present invention to make the both available sand mold of casting mold of thin wall alloy foundry goods, the also shell mould of available model casting or ceramic mould, but only mo(u)ld top half, mo(u)ld bottom half or the core immersion crystalline with casting mold solidifies, can obtain needed thin wall alloy foundry goods, its wall thickness is to determine the thinnest 0.2mm that reaches by the time of control casting mold submergence.Because the crystallization and freezing moulding is carried out in electric induction furnace, the semi liquid state alloy makes crystal or dendrite branch twig drop, and forms thin equiax crystal under the effect of rotating excitation field.
Adopt the present invention to make foundry goods complex-shaped, that there are fine pattern and literal in the surface, its technical process is simple, does not need running and feeding system, and is with short production cycle, the economical with materials and the energy; The thin-section casting thickness that adopts the present invention to make is more even, and the narrow depression position of casting mold because heat-absorbent surface increases, thickens position solidification layer that corresponding foundry goods protrudes and strengthened, and pore, sand holes are few; The thin wall alloy foundry goods that adopts the present invention to make, crystal grain is less, and impurity and defective are few and disperse, so better mechanical property.The present invention is specially adapted to the bigger alloy of metacollid, can be used for making special-shaped thin wall pipe fitting, stereo handicraft article made, relief handicraft and thin-walled mould etc.
Fig. 1 is for making the generalized section of thin wall alloy section tube.Among the figure, 1 is that core 2 is alloy liquid, and 3 is thin-section casting, and 4 is electric induction furnace.
Fig. 2 is the generalized section of the thin-walled stereo handicraft article made of manufacturing.Among the figure, 5 is shell mould, and 6 are the cooled thin-walled stereo handicraft article made of moulding.
In conjunction with Fig. 1, be that example is done concrete description to the present invention now to make the thin-wall special-shaped pipe fitting of 1Cr18Ni9Ti.The 1Cr18Ni9Ti steel alloy blank of constant weight is added in the electric induction furnace 4, make its heat fused, the deoxidation slag hitting cools the temperature to this steel alloy liquidus temperature t then
LBelow=1510 ℃, be controlled at 1470 ℃ ± 20 ℃, with vertical the immersion in the alloy liquid 2 of core 1 of oven dry, expose on the alloy liquid level upper end of core 1 again, stop 2-3 after second with its slow proposition, at this moment, the all surface that core immerses has formed one deck solidification layer comparatively uniformly, cooling back sand removal, the alloy of the unnecessary part in excision two ends, promptly obtain the thin-wall special-shaped pipe fitting 3 of needed 1Cr18Ni9Ti, the wall thickness of pipe fitting is about 1.5mm.
In conjunction with Fig. 1 and Fig. 2, be example to make tin bronze (ZQSn10-5) thin-walled stereo handicraft article made again, the invention will be further described, the tin bronze alloys of constant weight is added in the electric induction furnace 4, make its heat fused, the deoxidation slag hitting cools the temperature to tin bronze alloys liquidus temperature t then
LBelow=1005 ℃, be controlled at 950 ℃ ± 10 ℃, to vertically immerse in the alloy liquid 2 with the shell mould 5 of investment casting method preparation again, the all surface that shell mould immerses has formed one deck solidification layer comparatively uniformly, cooling back sand removal, the alloy of excision redundance promptly obtains needed tin bronze thin-walled stereo handicraft article made 6, and its wall thickness is about 1.5mm.
Claims (4)
1, thin wall alloy product immersion crystalline forming method, technical process is preparation casting mold → oven dry or roasting → molten alloy → immersion crystalline forming → cooling sand removal → remove redundance alloy; Only it is characterized in that the mo(u)ld top half of casting mold or mo(u)ld bottom half or core (1) or shell mould (5) are directly immersed liquid---in the alloy liquid (2) of solid phase coexistence, make it immerse the surface crystallization coagulation forming.
2, thin wall alloy product immersion crystalline forming method according to claim 1 is characterized in that, the wall thickness of described thin wall alloy product is determined by the control Immersion time.
3, require 1 described thin wall alloy product immersion crystalline forming method according to power, it is characterized in that immersion crystalline forming carries out in electric induction furnace (4).
4, thin wall alloy product immersion crystalline forming method according to claim 1, the mo(u)ld top half of its casting mold, mo(u)ld bottom half, core (1) and shell mould (5) can be by the method preparations of sand casting, model casting, ceramic mold casting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97118729A CN1067928C (en) | 1997-09-23 | 1997-09-23 | Thin wall alloy product immersion crystalline forming method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN97118729A CN1067928C (en) | 1997-09-23 | 1997-09-23 | Thin wall alloy product immersion crystalline forming method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1212190A CN1212190A (en) | 1999-03-31 |
| CN1067928C true CN1067928C (en) | 2001-07-04 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN97118729A Expired - Fee Related CN1067928C (en) | 1997-09-23 | 1997-09-23 | Thin wall alloy product immersion crystalline forming method |
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| Country | Link |
|---|---|
| CN (1) | CN1067928C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103042194B (en) * | 2012-12-07 | 2015-08-12 | 重庆和鑫艺术品创作有限公司 | A kind of device and method for the preparation of ghost thin-section casting |
| CN110227797B (en) * | 2019-07-12 | 2021-05-28 | 维捷(苏州)三维打印有限公司 | Preparation process of three-dimensional printing ceramic shell for titanium alloy casting |
| CN113458365A (en) * | 2021-07-02 | 2021-10-01 | 宁国市华成金研科技有限公司 | Outside casting process and casting equipment |
| CN113600793A (en) * | 2021-09-06 | 2021-11-05 | 南京睿源利信息科技有限公司 | Precision casting mold and casting method thereof |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4807688A (en) * | 1985-04-08 | 1989-02-28 | Beetle Robert H | Submerged casting |
| CN1047235A (en) * | 1989-05-16 | 1990-11-28 | 曼内斯曼股份公司 | Manufacturing has the method for the hollow workpiece of clad |
-
1997
- 1997-09-23 CN CN97118729A patent/CN1067928C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4807688A (en) * | 1985-04-08 | 1989-02-28 | Beetle Robert H | Submerged casting |
| CN1047235A (en) * | 1989-05-16 | 1990-11-28 | 曼内斯曼股份公司 | Manufacturing has the method for the hollow workpiece of clad |
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| Publication number | Publication date |
|---|---|
| CN1212190A (en) | 1999-03-31 |
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Effective date of registration: 20081212 Address after: Chongqing City, Yubei District Road No. D2-10-3 Longji Metro Park Patentee after: Zeng Lijia Address before: No. 62, building 3-3, Jianxin village, Jiangbei District, Chongqing Patentee before: Zeng Zheng |
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