CN105364003A - Process for manufacturing zirconium alloy precision connecting special-shaped pieces - Google Patents
Process for manufacturing zirconium alloy precision connecting special-shaped pieces Download PDFInfo
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- CN105364003A CN105364003A CN201510698090.0A CN201510698090A CN105364003A CN 105364003 A CN105364003 A CN 105364003A CN 201510698090 A CN201510698090 A CN 201510698090A CN 105364003 A CN105364003 A CN 105364003A
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- mold
- ceramic
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- casting
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22C—FOUNDRY MOULDING
- B22C3/00—Selection of compositions for coating the surfaces of moulds, cores, or 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
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mold Materials And Core Materials (AREA)
Abstract
The invention discloses a process for manufacturing zirconium alloy precision connecting special-shaped pieces. The process includes the following steps that a wax emitter is used for emitting wax into a mold to make a ceramic fired mold; the formed fired mold is dried and then is subjected to trimming, adhesion and detection, and a mold set is obtained by combining a product model with a casting system; the ceramic mold is placed in a dip-coating chamber and subjected to vacuum dip-coating sequentially by a high-temperature resistant coating and a ceramic coating as primary layer coatings; the mold set is preheated at high temperature, and then the ceramic mold and electrodes are placed in a vacuum skull furnace to be cast; hot isostatic pressure is conducted on a casting; trimming and abrasive blasting are conducted on the casting subjected to hot isostatic pressure; thermal treatment is conducted after abrasive blasting; and the minitype casting with a mold shell is placed in a mold shell remover to be subjected to mold shell removal and later treatment, and the finished product is obtained. By means of the process for manufacturing zirconium alloy precision connecting special-shaped pieces, the quality of the casting can be improved, the defective rate is reduced, and the manufacturing cost is low.
Description
Technical field
The present invention relates to precision casting field, particularly relate to the technique that a kind of zircaloy precision connects shaped piece.
Background technology
At present, the manufacturing technology of zirconium and it's alloy pump, valve mainly contains forging machining+welding fabrication and casting two kinds.Zirconium and it's alloy pump valve adopts forging machining+welding fabrication technology in producing mostly.But this method makes stock utilization on the low side because material cutting output is large, make high cost because zirconium and it's alloy material price is expensive, the existence of weld seam simultaneously considerably increases the hidden danger in pump valve use.Therefore develop zirconium and it's alloy pump valve cast molding technology more and more to come into one's own, progressively replace machining+welding fabrication technology.
Summary of the invention
The technical problem that the present invention mainly solves is to provide a kind of technique prepared zircaloy precision and connect shaped piece, can improve casting quality, reduction in the numbers of seconds, low cost of manufacture.
For solving the problems of the technologies described above, the technical scheme that the present invention adopts is: provide a kind of zircaloy precision of preparing to connect the technique of shaped piece, comprise the following steps: a. prepares the ceramic model of foundry goods: to be taken in mould by wax make ceramic investment with penetrating wax machine; The fusible pattern be shaped is dried, carries out afterwards repairing a die, organizing sticky, inspection, then product model and running gate system are combined, obtain module; B. apply external skin: ceramic model is placed in dip-coating indoor, adopt high-temperature resistant coating and ceramic coating to carry out vacuum press-in coating successively as investment precoat; D. prepare foundry goods: first module is carried out high-temperature residual heat, then ceramic mould mould and electrode are loaded vacuum cooling-shell furnace, and pour into a mould; Foundry goods is carried out high temperature insostatic pressing (HIP); Foundry goods after high temperature insostatic pressing (HIP) is carried out repairing and sandblasting; Heat-treat after sandblasting; E. the demoulding: the miniature foundry goods with formwork is put into formwork removal device, carries out removing formwork and post-processed, obtain finished product.
In a preferred embodiment of the present invention, chemical method is adopted to carry out removing formwork in described step e, be specially and adopt melting alkali lye to remove alundum (Al2O3) formwork, hydrofluoric acid is adopted to remove silica formwork, wherein molten caustic soda is the mixture of NaOH and potassium hydroxide, and both ratios are 1: 1.2 or 1: 2.1.
In a preferred embodiment of the present invention, the high temperature resistant type coating in described step b is according to percentage by weight, and by 15 ~ 40wt% refractory powder, 55 ~ 70wt% binding agent, 2 ~ 3.1wt%, surfactant and 1.2 ~ 2.1wt% defoamer Homogeneous phase mixing form.
The invention has the beneficial effects as follows: the present invention prepares the technique that zircaloy precision connects shaped piece, can improve casting quality, reduction in the numbers of seconds, low cost of manufacture.
Detailed description of the invention
Be clearly and completely described to the technical scheme in the embodiment of the present invention below, obviously, described embodiment is only a part of embodiment of the present invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making other embodiments all obtained under creative work prerequisite, belong to the scope of protection of the invention.
Prepare zircaloy precision and connect the technique of shaped piece, comprise the following steps: a. prepares the ceramic model of foundry goods: wax taken in mould make ceramic investment with penetrating wax machine; The fusible pattern be shaped is dried, carries out afterwards repairing a die, organizing sticky, inspection, then product model and running gate system are combined, obtain module; B. apply external skin: ceramic model is placed in dip-coating indoor, adopt high-temperature resistant coating and ceramic coating to carry out vacuum press-in coating successively as investment precoat; D. prepare foundry goods: first module is carried out high-temperature residual heat, then ceramic mould mould and electrode are loaded vacuum cooling-shell furnace, and pour into a mould; Foundry goods is carried out high temperature insostatic pressing (HIP); Foundry goods after high temperature insostatic pressing (HIP) is carried out repairing and sandblasting; Heat-treat after sandblasting; E. the demoulding: the miniature foundry goods with formwork is put into formwork removal device, carries out removing formwork and post-processed, obtain finished product.
In addition, adopt chemical method to carry out removing formwork in described step e, be specially and adopt melting alkali lye to remove alundum (Al2O3) formwork, adopt hydrofluoric acid to remove silica formwork, wherein molten caustic soda is the mixture of NaOH and potassium hydroxide, and both ratios are 1: 1.2 or 1: 2.1.
In addition, the high temperature resistant type coating in described step b is according to percentage by weight, and by 15 ~ 40wt% refractory powder, 55 ~ 70wt% binding agent, 2 ~ 3.1wt%, surfactant and 1.2 ~ 2.1wt% defoamer Homogeneous phase mixing form.
Be different from prior art, the present invention prepares the technique that zircaloy precision connects shaped piece, can improve casting quality, reduction in the numbers of seconds, low cost of manufacture.
The foregoing is only embodiments of the invention; not thereby the scope of the claims of the present invention is limited; every utilize description of the present invention to do equivalent structure or equivalent flow process conversion; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present invention.
Claims (3)
1. prepare the technique that zircaloy precision connects shaped piece, it is characterized in that, comprise the following steps:
A. the ceramic model of foundry goods is prepared: to be taken in mould by wax make ceramic investment with penetrating wax machine; The fusible pattern be shaped is dried, carries out afterwards repairing a die, organizing sticky, inspection, then product model and running gate system are combined, obtain module;
B. apply external skin: ceramic model is placed in dip-coating indoor, adopt high-temperature resistant coating and ceramic coating to carry out vacuum press-in coating successively as investment precoat;
D. prepare foundry goods: first module is carried out high-temperature residual heat, then ceramic mould mould and electrode are loaded vacuum cooling-shell furnace, and pour into a mould; Foundry goods is carried out high temperature insostatic pressing (HIP); Foundry goods after high temperature insostatic pressing (HIP) is carried out repairing and sandblasting; Heat-treat after sandblasting;
E. the demoulding: the miniature foundry goods with formwork is put into formwork removal device, carries out removing formwork and post-processed, obtain finished product.
2. the technique prepared zircaloy precision and connect shaped piece according to claim 1, it is characterized in that,: adopt chemical method to carry out removing formwork in described step e, be specially and adopt melting alkali lye to remove alundum (Al2O3) formwork, hydrofluoric acid is adopted to remove silica formwork, wherein molten caustic soda is the mixture of NaOH and potassium hydroxide, and both ratios are 1: 1.2 or 1: 2.1.
3. the technique prepared zircaloy precision and connect shaped piece according to claim 1, it is characterized in that, high temperature resistant type coating in described step b is according to percentage by weight, by 15 ~ 40wt% refractory powder, 55 ~ 70wt% binding agent, 2 ~ 3.1wt%, surfactant and 1.2 ~ 2.1wt% defoamer Homogeneous phase mixing form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510698090.0A CN105364003A (en) | 2015-10-26 | 2015-10-26 | Process for manufacturing zirconium alloy precision connecting special-shaped pieces |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510698090.0A CN105364003A (en) | 2015-10-26 | 2015-10-26 | Process for manufacturing zirconium alloy precision connecting special-shaped pieces |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105364003A true CN105364003A (en) | 2016-03-02 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510698090.0A Pending CN105364003A (en) | 2015-10-26 | 2015-10-26 | Process for manufacturing zirconium alloy precision connecting special-shaped pieces |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116922546A (en) * | 2023-09-18 | 2023-10-24 | 成都永益泵业股份有限公司 | Method for manufacturing molded part by using zirconia and pump flow passage component |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549385A (en) * | 2008-03-31 | 2009-10-07 | 沈阳工业大学 | Process method for preparing high-temperature alloy miniature precision casting part |
| CN101590511A (en) * | 2009-07-10 | 2009-12-02 | 沈阳北方钛工业有限公司 | A kind of process of producing zirconium and zircaloy pump, valve precision casting |
| CN101947648A (en) * | 2010-11-03 | 2011-01-19 | 西安泵阀总厂有限公司 | Method for producing large zirconium and zirconium alloy casting |
| CN101947640A (en) * | 2010-11-03 | 2011-01-19 | 西安泵阀总厂有限公司 | Method for preparing zirconium and zirconium alloy investment precision casting oxide ceramic molding shell |
| CN102366819A (en) * | 2011-10-10 | 2012-03-07 | 刘群联 | Method for precision casting of titanium alloy |
| CN104475682A (en) * | 2014-12-17 | 2015-04-01 | 北京航空航天大学 | Combined wax pattern-based method of achieving precision investment casting for heat-resistant cast steel thin-wall turbine shell |
-
2015
- 2015-10-26 CN CN201510698090.0A patent/CN105364003A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101549385A (en) * | 2008-03-31 | 2009-10-07 | 沈阳工业大学 | Process method for preparing high-temperature alloy miniature precision casting part |
| CN101590511A (en) * | 2009-07-10 | 2009-12-02 | 沈阳北方钛工业有限公司 | A kind of process of producing zirconium and zircaloy pump, valve precision casting |
| CN101947648A (en) * | 2010-11-03 | 2011-01-19 | 西安泵阀总厂有限公司 | Method for producing large zirconium and zirconium alloy casting |
| CN101947640A (en) * | 2010-11-03 | 2011-01-19 | 西安泵阀总厂有限公司 | Method for preparing zirconium and zirconium alloy investment precision casting oxide ceramic molding shell |
| CN102366819A (en) * | 2011-10-10 | 2012-03-07 | 刘群联 | Method for precision casting of titanium alloy |
| CN104475682A (en) * | 2014-12-17 | 2015-04-01 | 北京航空航天大学 | Combined wax pattern-based method of achieving precision investment casting for heat-resistant cast steel thin-wall turbine shell |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116922546A (en) * | 2023-09-18 | 2023-10-24 | 成都永益泵业股份有限公司 | Method for manufacturing molded part by using zirconia and pump flow passage component |
| CN116922546B (en) * | 2023-09-18 | 2023-12-29 | 成都永益泵业股份有限公司 | Method for manufacturing molded part by using zirconia and pump flow passage component |
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Application publication date: 20160302 |
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