CN105397026B - A kind of casting technique forming complex pipeline in titanium investment casting - Google Patents
A kind of casting technique forming complex pipeline in titanium investment casting Download PDFInfo
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- CN105397026B CN105397026B CN201510852340.1A CN201510852340A CN105397026B CN 105397026 B CN105397026 B CN 105397026B CN 201510852340 A CN201510852340 A CN 201510852340A CN 105397026 B CN105397026 B CN 105397026B
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Abstract
The step of the invention discloses a kind of in titanium investment casting forms the casting technique of complex pipeline, the technique is：Prepare pipeline, parting makes wax-pattern, is poured into a mould after roasting, formwork edge titanium tube after combination wax-pattern, steam dewaxing.Gapless between pipe and ontology that the present invention is formed can meet the requirement of the sealing and pressure resistance of pipeline；It is more flexible with respect to ceramic core and direct coating formation pipeline to form pipeline, the variously-shaped pipeline forming technological requirement of casting can be met, reduce casting manufacturability difficulty；After implementing the process program, overcomes cleaning difficulty, using restricted disadvantage, ensure that surface quality of continuous castings, shorten the production cycle, saved castings production cost；Due to the titanium pipe-inserted again after formwork high-temperature roasting, reduce the deflection during casting process, the quality in kind of casting has obtained further raising.
Description
Technical field
The present invention relates to investment pattern precision casting field more particularly to a kind of castings forming complex pipeline in titanium investment casting
Make technique.
Background technology
In existing titanium investment castings production technology, traditional titanium alloy casting pipeline formed mainly using core at
The method of type.The position of diameter >=φ 20 and curvature more than 90 degree is no more than at one, generally takes the side of direct paint case making
Method is formed；Diameter is between φ 10 and φ 20, and length≤100 and bending are more than 90 degree of position no more than better simply at two
Pipeline generally uses ceramic core；For 10 complex-shaped long pipelines of diameter≤φ, both the above process program is in practical behaviour
It will appear following problem during making：1, the ceramic core and formwork not easy-clear for forming pipeline, are easy damage during cleaning
Hinder inner wall of the pipe；2, core is easily broken off and core shift under the fierce impact of titanium liquid, cause casting pipeline wall thickness is uneven, owe casting and
Runout；3, ceramic core is difficult to position in a mold, is easy eccentric or fracture；4, pass through the painting in the complex pipeline of coating formation
Material cleaning is extremely difficult, cannot achieve substantially；5, titanium tube is embedded in corresponding position in the wax-pattern stage or is directly placed on titanium tube
Direct casting forms wax-pattern in mold, and in later stage formwork high-temperature roasting, titanium tube is easy to happen oxidation, cracking etc., causes to pour into a mould
Casting it is unqualified.
Invention content
The present invention is achieved by following technical solution：
A kind of casting technique forming complex pipeline in titanium investment casting, it is characterised in that its processing step is：
(1) pipeline is fabricated to the shape of needs, yttrium oxide sand, pipeline opening waterglass aluminum mixture vanadium are filled up in pipeline
Native mud is blocked；
(2) by pipeline parting, and main body wax-pattern, seperated wax-pattern and cover board wax-pattern are made by parting, seperated wax-pattern includes viscous
Grafting wax mould；
(3) bonding wax-pattern is bonded together with main body wax-pattern, is made after being roasted with main body wax-pattern steam dewaxing high-temperature vacuum
Integral shell；By the separately made shell of cover board wax-pattern；
(4) shell after steam dewaxing is pressed into vacuum degree≤10Pa；Temperature：1050±20℃；Heat preservation 3~5 is small after roasting
When, furnace cooling is come out of the stove to 180 DEG C or less；
(5) pipeline made is inserted into roasting shell, cover board wax-pattern shell and pipeline is positioned, then use blowtorch
Moisture removal is removed in baking, is combined into integrated poured shell；
(6) integrated poured shell preheated, poured into a mould, the casting after cast, the technique of precision-investment casting by
Flow walks process.
Yttrium oxide sand in the step (1) is 100 mesh sand.
It needs to open up positioning core print on body die in the step (2), prevents titanium tube in molten metal impact force and centrifugal force
The lower bias of effect.
The beneficial effects of the invention are as follows：
Compared with prior art, a kind of founder forming complex pipeline in titanium investment casting provided by the invention
Skill, gapless between the pipe and ontology of formation can meet the requirement of the sealing and pressure resistance of pipeline；The process program forms pipe
Road is more flexible with respect to ceramic core and direct coating formation pipeline, can meet the variously-shaped pipeline forming technological requirement of casting,
Reduce casting manufacturability difficulty；After implementing the process program, overcomes cleaning difficulty, using restricted disadvantage, ensure that casting
Part surface quality shortens the production cycle, has saved castings production cost；Due to the titanium pipe-inserted again after formwork high-temperature roasting, subtract
The deflection during casting process is lacked, the quality in kind of casting has obtained further raising.
Description of the drawings
Fig. 1 is the embodiment of the present invention structure chart
In figure：1- seals core print, 2- yttrium oxide sands, 3- tracheaes, 4- wax-pattern casting, 5- cover board formworks, 6- oil pipes, 7- moulds
Shell, 8- plugs.
Specific implementation mode
Technical scheme of the present invention is described further below in conjunction with attached drawing, but required protection domain does not limit to
In described；
It is as shown in Figure 1 formation oil pipe 6 in pipeline, the implementing process of tracheae 3,
(1) tracheae 3 and oil pipe 6 are fabricated to shape as shown in the figure, 100 mesh oxygen is filled up in 6 pipeline of tracheae 3 and oil pipe
Change yttrium sand, pipeline opening is blocked with waterglass aluminum mixture vanadine mud；Prevent slurry from penetrating into pipeline.
(2) by pipeline parting, the main body wax-pattern with 3 cavity of tracheae and casting ontology is made, makes and contains 6 cavity of oil pipe
With the seperated wax-pattern and cover board wax-pattern 5 of bonding wax-pattern；Main body wax-pattern, which is equipped with positioning core print, prevents titanium tube in molten metal impact force
With bias under centrifugation force effect；
(3) bonding wax-pattern is bonded together with main body wax-pattern, is made after being roasted with main body wax-pattern steam dewaxing high-temperature vacuum
Integral wax-pattern casting 4；By 5 separately made shell of seperated cover board wax-pattern；
(4) wax-pattern casting 4 is pressed to vacuum degree 9Pa after steam dewaxing；Temperature：1070℃；4 hours are kept the temperature after roasting, with
Stove is cooled to 180 DEG C or less and comes out of the stove；
(5) tracheae 3 made, oil pipe 6 are inserted into roasting shell, in the built-in upper plug head 8 of the pipeline opening of exposing,
Pipeline is positioned with cover board formwork 5, then goes after moisture removal to be combined into integrated poured shell with blowtorch baking；
(6) integrated poured shell preheated, poured into a mould, the casting after cast, the technique of precision-investment casting by
Flow walks process.
Claims (3)
1. a kind of casting technique forming complex pipeline in titanium investment casting, it is characterised in that its processing step is：
(1) pipeline is fabricated to the shape of needs, yttrium oxide sand, pipeline opening waterglass aluminum mixture vanadine mud are filled up in pipeline
It blocks；
(2) by pipeline parting, and main body wax-pattern, seperated wax-pattern and cover board wax-pattern are made by parting, seperated wax-pattern includes bonding wax
Mould；
(3) bonding wax-pattern is bonded together with main body wax-pattern, is made after being roasted with main body wax-pattern steam dewaxing high-temperature vacuum whole
Build shell；Separately made cover board wax-pattern shell after cover board wax mould dewaxing high-temperature vacuum is roasted；
(4) vacuum degree≤10Pa will be pressed after the shell mould after steam dewaxing；Temperature：1050±20℃；
3~5 hours are kept the temperature after roasting, furnace cooling is come out of the stove to 180 DEG C or less；
(5) pipeline made is inserted into roasting whole shell, cover board wax-pattern shell and pipeline is positioned, then use blowtorch
Moisture removal is removed in baking, is combined into integrated poured shell；
(6) integrated poured shell preheated, poured into a mould, the casting after cast, the technological process of precision-investment casting by
Walk process.
2. a kind of casting technique forming complex pipeline in titanium investment casting according to claim 1, feature
It is：Yttrium oxide sand in the step (1) is 100 mesh sand.
3. a kind of casting technique forming complex pipeline in titanium investment casting according to claim 1, feature
It is：It needs to open up positioning core print on body die in the step (2), prevents titanium tube in molten metal impact force and centrifugation force effect
Lower bias.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510852340.1A CN105397026B (en) | 2015-11-30 | 2015-11-30 | A kind of casting technique forming complex pipeline in titanium investment casting |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510852340.1A CN105397026B (en) | 2015-11-30 | 2015-11-30 | A kind of casting technique forming complex pipeline in titanium investment casting |
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| Publication Number | Publication Date |
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| CN105397026A CN105397026A (en) | 2016-03-16 |
| CN105397026B true CN105397026B (en) | 2018-09-07 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106392007B (en) * | 2016-06-12 | 2021-06-29 | 蔡耀名 | Method and device for dewaxing ceramic shell |
| CN111761027B (en) * | 2020-05-21 | 2021-10-26 | 洛阳双瑞精铸钛业有限公司 | Process method for manufacturing titanium and titanium alloy precision castings through photosensitive resin mold |
| CN114160755A (en) * | 2021-03-01 | 2022-03-11 | 贵州安吉航空精密铸造有限责任公司 | Investment casting forming method for casting with built-in L-shaped hollow pipe |
| CN114425605B (en) * | 2021-12-31 | 2023-10-27 | 北京航空材料研究院股份有限公司 | Preparation method of titanium and titanium alloy casting containing special-shaped inner cavity |
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| JPH038533A (en) * | 1989-03-22 | 1991-01-16 | Shin Etsu Chem Co Ltd | Rare earth oxide slurry |
| JP2005245215A (en) * | 2004-03-01 | 2005-09-15 | Fu Sheng Industrial Co Ltd | Method for producing reel seat for fishing rod |
| JP4641464B2 (en) * | 2005-08-19 | 2011-03-02 | アイコクアルファ株式会社 | Titanium compressor wheel manufacturing method |
| CN102000955A (en) * | 2010-12-06 | 2011-04-06 | 贵州安吉航空精密铸造有限责任公司 | Method for manufacturing titanium pipe-inserted casting |
| CN102806311B (en) * | 2012-08-30 | 2014-05-14 | 贵州安吉航空精密铸造有限责任公司 | Forming process of complicated titanium alloy investment casting pipeline |
| CN103240391B (en) * | 2013-04-25 | 2015-05-27 | 西安西工大超晶科技发展有限责任公司 | Method for preparing metal core for investment casting and precision investment casting method for aluminum alloy casting based on metal core |
| CN103521715B (en) * | 2013-09-07 | 2016-03-02 | 北京百慕航材高科技股份有限公司 | A kind of preparation method of the titanium or titanium alloy precision casting containing elongated lumens |
| CN103949588B (en) * | 2014-04-25 | 2016-04-20 | 西安航空动力股份有限公司 | The manufacturing process of elongate curved irregularly-shaped hole in a kind of aluminium alloy castings |
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