CN109763010A - A kind of preparation method of high-stability nano alloy - Google Patents
A kind of preparation method of high-stability nano alloy Download PDFInfo
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- CN109763010A CN109763010A CN201711099551.8A CN201711099551A CN109763010A CN 109763010 A CN109763010 A CN 109763010A CN 201711099551 A CN201711099551 A CN 201711099551A CN 109763010 A CN109763010 A CN 109763010A
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- sintering
- alloy
- green compact
- inner core
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Abstract
The invention discloses a kind of preparation methods of high-stability nano alloy, make alloy inner core and annular alloy green compact, and the constriction coefficient of annular alloy green compact is greater than alloy inner core, alloy inner core is nested in annular alloy green compact, the two interference fit composition nest；Nest is put into sintering furnace and carries out first sintering, vacuumizes and is filled with nitrogen, 1200~1300 DEG C of sintering temperature, sintering time 1-3 hours；Carry out double sintering is vacuumized, 1380~1470 DEG C of sintering temperature, sintering time 1-2 hours, room temperature is down to, completes sintering.The invention has the advantages that passing through the powder with the two or more trade mark, the green compact of different constriction coefficients is suppressed respectively, pass through the shove charge method of two product nestings again, so that internal firing diameter and external firing size internal diameter fitting, the gradient nano alloy of the inside and outside different trades mark can be prepared in this way, can also increase product outer diameter with this method.
Description
Technical field
The present invention relates to a kind of preparation methods of high-stability nano alloy.
Background technique
Nanoalloy during use, the requirement inside and outside product be it is different, the performance of alloy is needed in this way
Asking also just has difference.Gradient nano alloy is prepared with structured approach, if the material of two kinds of trades mark is added separately in mold, so that inside and outside
Material is different, since the constriction coefficient of two kinds of trade mark material is different, will cause in sintering process and cracks, or deformation of products is tight after firing
Weight, can not process.
Summary of the invention
The purpose of the present invention is to provide a kind of preparation methods of high-stability nano alloy, can effectively solve the problem that existing structure
The method of making prepares the problem of gradient nano alloy is easily deformed cracking in sintering procedure.
In order to solve the above-mentioned technical problem, the present invention is achieved by the following technical solutions: a kind of gradient-structure nanometer
The preparation method of alloy, successively the following steps are included:
A. production alloy inner core and annular alloy green compact, the constriction coefficient of annular alloy green compact are greater than alloy inner core, will close
Golden inner core is nested in annular alloy green compact, the two interference fit composition nest；
B. nest is put into sintering furnace and carries out first sintering, be filled with nitrogen after vacuumizing, sintering temperature 1200~
1300 DEG C, sintering time 1-3 hours；
C. carry out double sintering is vacuumized, 1380~1470 DEG C of sintering temperature, sintering time 1-2 hours, is down to room temperature, it is complete
At sintering.
Compared with prior art, the invention has the advantages that being pressed respectively by the powder with the two or more trade mark
The green compact of different constriction coefficients is made, then passes through the shove charge method of two product nestings, so that internal firing diameter and outside
It is burnt into the fitting of size internal diameter, the gradient nano alloy of the inside and outside different trades mark can be prepared in this way, can also be increased with this method and be produced
Product outer diameter.
Specific embodiment
Embodiment one:
The outer diameter of trade mark YG15 is not had into the product of machining allowance, circle product external rounding is become by peripheral milling and is closed
Golden inner core, then the annular alloy green compact of alloy powder one circular ring shape of compacting with the identical trade mark, alloy inner core and annular are closed
Golden green compact interference fit composition nest, nest is put into sintering furnace and carries out first sintering, is filled with argon gas after vacuumizing,
It keeps micro-positive pressure pressure to prevent air from entering, 1250 DEG C of sintering temperature, sintering time 2 hours, completes annular alloy green compact
Product shrinks 80~90%, then vacuumizes carry out double sintering, 1430 DEG C of sintering temperature, sintering time 1.5 hours, is down to room
Temperature, completion sintering add the workpiece originally without surplus processing smoothly to make the annular alloy green compact fitting after shrinking
Work.
Embodiment two:
The cylindrical alloy inner core for being 1.21 at constriction coefficient by the powder pressing of YG8, the annulus of a re-compacted YG15
The annular alloy green compact of shape, constriction coefficient 1.28~1.35,100 microns of the two magnitude of interference, by alloy inner core and annular alloy pressure
Base interference fit composition nest, nest is put into sintering furnace and carries out first sintering, argon gas is filled with after vacuumizing, is kept
Micro-positive pressure pressure is to prevent air from entering, and 1280 DEG C of sintering temperature, sintering time 1.5 hours, annular alloy green compact is made to complete to produce
Product shrink 80~90%, then vacuumize carry out double sintering, 1380 DEG C of sintering temperature, sintering time 1.5 hours, are down to room temperature,
Sintering is completed, for product in junction there are interface, interface tensile strength reaches the tensile strength of original YG8 alloy after firing.
Above-mentioned two embodiment passes through the shove charge method of two product nestings, so that internal firing diameter and outside are burnt
It is bonded at size internal diameter, the gradient nano alloy of the inside and outside different trades mark can be prepared in this way, product can also be increased with this method
Outer diameter.
Above is only a specific embodiment of the present invention, but technical characteristic of the invention is not limited thereto, Ren Heben
Within the field of the present invention, made changes or modifications all cover within the scope of the patent of the present invention the technical staff in field.
Claims (1)
1. a kind of preparation method of high-stability nano alloy, it is characterised in that: successively the following steps are included:
A. production alloy inner core and annular alloy green compact, the constriction coefficient of annular alloy green compact are greater than alloy inner core, will be in alloy
Core is nested in annular alloy green compact, the two interference fit composition nest；
B. nest is put into sintering furnace and carries out first sintering, nitrogen, sintering temperature 1200~1300 are filled with after vacuumizing
DEG C, sintering time 1-3 hours；
C. carry out double sintering is vacuumized, 1380~1470 DEG C of sintering temperature, sintering time 1-2 hours, room temperature is down to, completes to burn
Knot.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711099551.8A CN109763010A (en) | 2017-11-09 | 2017-11-09 | A kind of preparation method of high-stability nano alloy |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711099551.8A CN109763010A (en) | 2017-11-09 | 2017-11-09 | A kind of preparation method of high-stability nano alloy |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109763010A true CN109763010A (en) | 2019-05-17 |
Family
ID=66449776
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711099551.8A Pending CN109763010A (en) | 2017-11-09 | 2017-11-09 | A kind of preparation method of high-stability nano alloy |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109763010A (en) |
-
2017
- 2017-11-09 CN CN201711099551.8A patent/CN109763010A/en active Pending
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Legal Events
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190517 |