CN201512568U - Restraint presintering die for preparing TiAl based alloy - Google Patents
Restraint presintering die for preparing TiAl based alloy Download PDFInfo
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- CN201512568U CN201512568U CN2009200344687U CN200920034468U CN201512568U CN 201512568 U CN201512568 U CN 201512568U CN 2009200344687 U CN2009200344687 U CN 2009200344687U CN 200920034468 U CN200920034468 U CN 200920034468U CN 201512568 U CN201512568 U CN 201512568U
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- die plate
- presintering
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- lower bolster
- restraint
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Abstract
The utility model discloses a restraint presintering die for preparing TiAl based alloy. The restraint presintering die comprises an upper die plate and a lower die plate which are arranged symmetrically, as well as a pair of long lateral plates and a pair of short lateral plates which are arranged between the upper die plate and the lower die plate; two rectangular grooves are respectively arranged on the inner sides of the upper die plate and the lower die plate which are arranged symmetrically; breather holes are respectively formed at the middle part of the upper die plate and the lower die plate which are arranged symmetrically; the pair of long lateral plates and the pair of short lateral plates are respectively arranged in the two rectangular grooves of the upper die plate and the lower die plate and are combined with the upper die plate and the lower die plate into a sealed box-shaped die cavity. The utility model has the advantages of simple structure and convenient use and operation; in the restraint presintering technology of preparing TiAl based alloy with element powder, the restraint presintering die can effectively restrain great voluminal expansion of the element powder during presintering, thereby laying the foundation for the follow-up high-temperature sintering or the hot isostatic pressing technology, and preparing high-density TiAl based alloy.
Description
Technical field
The utility model relates to powder metallurgy sintered technical field of mold, is specifically related to a kind of constraint presintering mould that the element powders legal system is equipped with TiAl base alloy that is used for.
Background technology
Powder metallurgic method is a kind of important method of preparation TiAl base alloy, adopt the TiAl base alloy of powder metallurgic method preparation have composition evenly, organize tiny and do not have casting flaws such as loose and shrinkage cavity, and be easy to realize the near-net forming of complicated shape.Divide by the raw material that adopts, powder metallurgic method prepares TiAl base alloy can be divided into prealloy method and element powders method.Relative prealloy method, the element powders method adopts the mixture of Al powder and Ti powder or Al powder and TiH2 powder as raw material, therefore do not need expensive prealloy powder and complicated processing unit, can effectively reduce production costs, the various high-meltiing alloy elements of convenient simultaneously interpolation, mix and pyroreaction by homogenizing, reduced component segregation, this makes the element powders method become a kind of preparation method of very promising TiAl base alloy.
With Al powder and Ti powder or Al powder and TiH
2The mixture of powder is as raw material, adopt the element powders legal system to be equipped with the expansion significantly that TiAl base alloy is attended by volume often, directly carry out high temperature sintering as if vacuum oven that powder compact is packed into, the porosity of the TiAl base alloy that this technology makes can reach 30%-40%, and so big porosity is disadvantageous to the performance of material and follow-up processing and use.Volume expands significantly during for the constraint element powdered reaction, the TiAl base alloy of preparation high densification often adopts low temperature constraint presintering and the technical process of high temperature sintering bonded to prepare TiAl base alloy, and this technical process is simple, cost is lower, and can realize suitability for industrialized production.In this technical process, the constraint presintering be the key link, especially in the alloy Ti composition with TiH
2Powder adds fashionable, needs to carry out TiH before Al and Ti powdered reaction
2The dehydrogenation link of powder, this needs the mixed powder pressed compact to carry out in a special mould, still, does not have special mould that this link is well carried out at present.
The utility model content
The purpose of this utility model is at above-mentioned deficiency of the prior art, a kind of constraint presintering mould of the TiAl of preparation base alloy is provided, its simple in structure and use easy to operate, can operative constraint volumetric expansion during element powders presintering, and guarantee that the dehydrogenation link carries out smoothly.
For solving the problems of the technologies described above, the technical solution adopted in the utility model is: a kind of constraint presintering mould for preparing TiAl base alloy, comprise two symmetrically arranged top plates and lower bolster and be arranged on top plate and lower bolster between a pair of long side plate and a pair of short side plate, it is characterized in that: described two symmetrically arranged top plates and lower bolster inboard are provided with rectangular recess, and two symmetrically arranged top plates and lower bolster middle part are provided with breather hole; Described a pair of long side plate and a pair of short side plate are separately positioned in two rectangular recess of top plate and lower bolster, and are combined to form the box-like die cavity of a sealing with top plate and lower bolster.
Described top plate is connected by bolt with lower bolster.
The utility model compared with prior art has the following advantages:
1, simple in structure, use easy to operate.
2, can operative constraint during element powders presintering volume significantly expand, guarantee that the dehydrogenation link carries out smoothly.
3, convenient disassembly, dress are got material easily, and are easy to make the hydrogen of dehydrogenation stage generation to overflow owing to have breather hole on the template.
4, can effectively reduce the porosity of presintering product,, prepare high fine and close TiAl based alloy plate for follow-up high temperature sintering or heat and other static pressuring processes lay the foundation.
Below by drawings and Examples, the technical solution of the utility model is described in further detail.
Description of drawings
Fig. 1 is an one-piece construction synoptic diagram of the present utility model;
Fig. 2 is the structural representation of the utility model top plate;
Fig. 3 is the structural representation of the utility model lower bolster;
Fig. 4 is the structural representation of the long side plate of the utility model;
Fig. 5 is the structural representation of the utility model short side plate.
Description of reference numerals:
The 1-top plate; The 2-lower bolster; The long side plate of 3-;
The 4-short side plate; The 5-breather hole; The 6-rectangular recess.
Embodiment
A kind of constraint presintering mould for preparing TiAl base alloy as shown in Figure 1, comprise two symmetrically arranged top plates 1 and lower bolster 2 and be arranged on top plate 1 and lower bolster 2 between a pair of long side plate 3 and a pair of short side plate 4, two symmetrically arranged top plates 1 and lower bolster 2 inboards are provided with the rectangular recess 6 through Milling Process, and the middle part is provided with the breather hole 5 through drilling through processing, a pair of long side plate 3 and a pair of short side plate 4 are separately positioned in two rectangular recess 6 of top plate 1 and lower bolster 2, be combined to form the box-like die cavity of a sealing with top plate 1 and lower bolster 2, described two symmetrically arranged top plates 1 and lower bolster 2 are connected by bolt.Described top plate 1 is fixedlyed connected with lower bolster 2.
Fig. 2 and Fig. 3 are respectively the structural representation of top plate 1 and lower bolster 2, and top plate 1 and lower bolster 2 middle parts are distributed with the breather hole 5 of some amount, so that the hydrogen that dehydrogenation stage produces is overflowed.
Fig. 4 and Fig. 5 are respectively the structural representation of long side plate 3 and short side plate 4, and long side plate 3 and short side plate 4 all snap in the rectangular recess.
Below the assembling of the constraint presintering mould of preparation TiAl base alloy is used and is elaborated:
A kind of constraint presintering mould for preparing TiAl base alloy as shown in Figure 1, comprise top plate 1, lower bolster 2, a pair of long side plate 3 and a pair of short side plate 4, used material is mainly the 3Cr2W8V steel, top plate 1 and lower bolster 2 can be selected the thick steel plate of 20mm for use, by cutting and edge chamfering, go out wide 26mm in the middle part Milling Process then, dark 8mm, inside casing is of a size of the groove of 300mm * 400mm, at groove size, select for use with the material steel, cut out a pair of long side plate 3 that is of a size of 400mm * 25mm * 50mm and a pair of short side plate 4 of 350mm * 25mm * 50mm, the corresponding position processes bolt hole on the limit of top plate 1 and lower bolster 2 at last, and drills through the breather hole 5 of some amount Φ 3mm size at the middle part.During use, with this die assembling, place powder compact in die cavity, add a cover top plate 1 then, long side plate 3 and short side plate 4 are all snapped in the groove of top plate 1, inserting bolt between top plate 1 and lower bolster 2 is at last tightened with nut and to be put into vacuum oven after fixing, carries out technologies such as vacuum dehydrogenation and reaction sintering.
Claims (3)
1. constraint presintering mould for preparing TiAl base alloy, comprise two symmetrically arranged top plates (1) and lower bolster (2) and be arranged on top plate (1) and lower bolster (2) between a pair of long side plate (3) and a pair of short side plate (4), it is characterized in that: described two symmetrically arranged top plates (1) and lower bolster (2) inboard are provided with rectangular recess (6), and are provided with breather hole (5) in the middle part of two symmetrically arranged top plates (1) and the lower bolster (2); Described a pair of long side plate (3) and a pair of short side plate (4) are separately positioned in two rectangular recess (6) of top plate (1) and lower bolster (2), and are combined to form the box-like die cavity of a sealing with top plate (1) and lower bolster (2).
2. according to the described a kind of constraint presintering mould for preparing TiAl base alloy of claim 1, it is characterized in that: described top plate (1) is fixedlyed connected with lower bolster (2).
3. according to the described a kind of constraint presintering mould for preparing TiAl base alloy of claim 2, it is characterized in that: described top plate (1) is connected by bolt with lower bolster (2).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200344687U CN201512568U (en) | 2009-09-08 | 2009-09-08 | Restraint presintering die for preparing TiAl based alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200344687U CN201512568U (en) | 2009-09-08 | 2009-09-08 | Restraint presintering die for preparing TiAl based alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201512568U true CN201512568U (en) | 2010-06-23 |
Family
ID=42483976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200344687U Expired - Lifetime CN201512568U (en) | 2009-09-08 | 2009-09-08 | Restraint presintering die for preparing TiAl based alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201512568U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154570A (en) * | 2010-11-02 | 2011-08-17 | 哈尔滨工业大学 | Preparation method of Ti5Si3/TiAl based composite material |
| CN103286314A (en) * | 2013-06-26 | 2013-09-11 | 苏州唐氏机械制造有限公司 | Mold convenient to release |
-
2009
- 2009-09-08 CN CN2009200344687U patent/CN201512568U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102154570A (en) * | 2010-11-02 | 2011-08-17 | 哈尔滨工业大学 | Preparation method of Ti5Si3/TiAl based composite material |
| CN103286314A (en) * | 2013-06-26 | 2013-09-11 | 苏州唐氏机械制造有限公司 | Mold convenient to release |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100623 |