CN106222607B - A kind of infiltration cobalt aluminium penetration enhancer and method - Google Patents
A kind of infiltration cobalt aluminium penetration enhancer and method Download PDFInfo
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- CN106222607B CN106222607B CN201610766143.2A CN201610766143A CN106222607B CN 106222607 B CN106222607 B CN 106222607B CN 201610766143 A CN201610766143 A CN 201610766143A CN 106222607 B CN106222607 B CN 106222607B
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C10/00—Solid state diffusion of only metal elements or silicon into metallic material surfaces
- C23C10/06—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases
- C23C10/14—Solid state diffusion of only metal elements or silicon into metallic material surfaces using gases more than one element being diffused in one step
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Abstract
The invention belongs to chemical vapour deposition technique field, it is applied to complicated inner cavity blade metallic cementation field, and in particular to a kind of infiltration cobalt aluminium penetration enhancer and method.The penetration enhancer includes impregnation agent composition A and impregnation agent composition B, and in terms of mass fraction, impregnation agent composition A includes 19~29 parts of cobalt powder, nickel -1~11 part of yittrium alloy powder, and 15~25 parts of aluminium oxide powder, 1~1.2 part of ammonium iodide；Impregnation agent composition B includes 1.2 parts of ammonium iodide, 0.3~0.4 part of ammonium chloride, 45~55 parts of iron aluminium powder, 5~10 parts of pure aluminium powder.By impregnation agent composition A and impregnation agent composition B after mixing with test specimen together be placed in vapor deposition apparatus and be vapor-deposited to reach cobalt aluminium permeation.The penetration enhancer ingredient is easy, when carrying out seeping cobalt aluminium, [Al] and [Co] reaches balance, fine and close, continuous, uniform cobalt aluminium infiltration layer can be formed in surface of test piece, the complicated inner cavity type face of test specimen is set to obtain the uniform cobalt aluminium infiltration layer of structure by vapor deposition, the anti-oxidant and antiseptic property of test specimen is enhanced, is improved service life, it is easy to operate.
Description
[technical field]
The invention belongs to chemical vapour deposition technique fields, are applied to complicated inner cavity blade metallic cementation field, and in particular to
A kind of infiltration cobalt aluminium penetration enhancer and method.
[background technique]
Workpiece long-term work under marine environment, single aluminising are difficult to meet requirement for anticorrosion, and the permeation of cobalt aluminium can protected
Workpiece is demonstrate,proved under the premise of with antioxygenic property, additionally it is possible to effectively improve corrosion resistance, meet design special requirement.But cobalt
Element is difficult to penetrate into, and at high temperature, the intermediate material AlClx that thermal cracking is formed is easier to generate active relative to CoClx
[Al] forms NiAl phase, so that [Co] hardly enters the conjunction of Ni base high temperature.
[summary of the invention]
To solve problems of the prior art, the object of the present invention is to provide a kind of infiltration cobalt aluminium penetration enhancer and methods, use
Metallic cementation in blade inner cavity, ingredient is easy, easy to operate, and workpiece surface can be made to obtain uniform cobalt aluminium infiltration layer, enhances leaf
The anti-oxidant and antiseptic property of piece, improves the service life of blade.
The purpose of the present invention is achieved through the following technical solutions.
A kind of infiltration cobalt aluminium penetration enhancer, including impregnation agent composition A and impregnation agent composition B, in terms of mass fraction, impregnation agent composition A include with
Lower component: 19~29 parts of cobalt powder, nickel -1~11 part of yittrium alloy powder, 15~25 parts of aluminium oxide powder, 1~1.2 part of ammonium iodide；It seeps
Agent component B includes following components: 1~1.2 part of ammonium iodide, 0.3~0.4 part of ammonium chloride, and 45~55 parts of iron aluminium powder, pure aluminium powder 5~
10 parts.
In terms of mass fraction, the impregnation agent composition A includes 24 parts of cobalt powders, 6 parts of nickel-yittrium alloy powder, 20 part of three oxidation two
Aluminium powder, 1 part of ammonium iodide；Impregnation agent composition B includes 1.2 parts of ammonium iodides, 0.3 part of ammonium chloride, 50 parts of iron aluminium powders, 5 parts of pure aluminium powders.
The mixture for seeping calcined product and impregnation agent composition B that cobalt aluminium penetration enhancer is impregnation agent composition A.
A kind of infiltration cobalt aluminium method, by impregnation agent composition A and impregnation agent composition B after mixing with test specimen together be placed on gas phase and sink
It is vapor-deposited in product equipment, based on mass fraction, impregnation agent composition A includes 19~29 parts of cobalt powders, 1~11 part of nickel-yittrium alloy
Powder, 15~25 parts of aluminium oxide powders, 1~1.2 part of ammonium iodide；Impregnation agent composition B include 1~1.2 part of ammonium iodide, 0.3~0.4 part
Ammonium chloride, 45~55 parts of iron aluminium powders, 5~10 parts of pure aluminium powders.
First impregnation agent composition A is calcined, then by calcined substance and impregnation agent composition B be uniformly mixed again with test specimen together with
It is placed in vapor deposition apparatus and is vapor-deposited.
The impregnation agent composition A is calcined in vapor deposition apparatus, and the process of calcining is as follows, -0.01MPa~-
Impregnation agent composition A is heated to 950 DEG C~1000 DEG C under the vacuum degree of 0.02MPa, then keeps the temperature 3 hours~4 hours, after heat preservation
680 DEG C are cooled to the furnace hereinafter, carrying out again air-cooled.
The vapor deposition processes are as follows, heat penetration enhancer and workpiece under -0.01MPa~-0.02MPa vacuum degree
To 950 DEG C~1000 DEG C, then 6 hours~8 hours are kept the temperature, cools to 680 DEG C after heat preservation with the furnace hereinafter, carrying out again air-cooled.
The test specimen carries out diffusion in vacuum after having carried out vapor deposition again.
The pressure of the diffusion in vacuum is less than 6.65 × 10-2Pa starts 6.65~10.64Pa of partial pressure at 800 DEG C, protects
Temperature is 950 DEG C~1000 DEG C, and soaking time is 1 hour~2 hours, is cooled down after heat preservation.
The test specimen carries out blast processing to its surface before vapor deposition.
The invention has the following beneficial effects:
Penetration enhancer ingredient of the invention is easy, and when carrying out seeping cobalt aluminium, [Al] and [Co] reaches balance, can be in surface of test piece
Fine and close, continuous, uniform cobalt aluminium infiltration layer is formed, enabling the complicated inner cavity type face of test specimen by vapor deposition, to obtain structure uniform
Cobalt aluminium infiltration layer enhances the anti-oxidant and antiseptic property of test specimen, improves the service life of test specimen, and easy to operate.
Further, impregnation agent composition A is first calcined, then calcined substance is uniformly mixed again with impregnation agent composition B
It is vapor-deposited, so that improving the reactivity of cobalt atom and aluminium atom in vapor deposition processes, it is total that cobalt aluminium can be reduced
Seep the time.
Further, the present invention carries out diffusion in vacuum again after test specimen is vapor-deposited, so that infiltration layer and surface of test piece
It is more preferable in conjunction with effect.
Further, test specimen of the invention, which carries out blast processing to its surface before vapor deposition, can remove surface of test piece
Passivating film, can be improved the effect of cobalt aluminium permeation.
Infiltration cobalt aluminium penetration enhancer and method through the invention carries out after seeping cobalt aluminium surface of test piece, the cobalt aluminium infiltration layer of surface of test piece
Densification, uniform continuity is good, and the depth of infiltration layer is 20~35 μm.
[Detailed description of the invention]
Fig. 1 is the metallographic structure for seeping cobalt aluminium layer；
Fig. 2 (a) be test specimen seep cobalt aluminium and diffusion after constituent analysis aluminium element result figure, Fig. 2 (b) be test specimen seep cobalt aluminium and
The result figure of constituent analysis cobalt element after diffusion.
[specific embodiment]
Below with reference to embodiment and attached drawing, the present invention is further illustrated.
Technical scheme is as follows, and infiltration cobalt aluminium penetration enhancer of the invention includes impregnation agent composition A and impregnation agent composition B, with matter
Number meter is measured, impregnation agent composition A includes following components: 19~29 parts of cobalt powder, nickel -1~11 part of yittrium alloy powder, aluminium oxide powder 15
~25 parts, 1~1.2 part of ammonium iodide；Impregnation agent composition B includes following components: 1~1.2 part of ammonium iodide, 0.3~0.4 part of ammonium chloride,
45~55 parts of iron aluminium powder, 5~10 parts of pure aluminium powder.
When infiltration cobalt aluminium penetration enhancer through the invention is vapor-deposited to workpiece, first the surface of test specimen is carried out at blast
Reason, removes the passivating film of surface of test piece, then by impregnation agent composition A and impregnation agent composition B after mixing with test specimen together be placed on horse
Not it is vapor-deposited in tank；
Or first impregnation agent composition A is calcined before being vapor-deposited, the process of the calcining of impregnation agent composition A is as follows,
Impregnation agent composition A is heated to 950 DEG C~1000 DEG C under -0.01MPa~-0.02MPa vacuum degree, then to keep the temperature 3 hours~4 small
When, cooled to the furnace after heat preservation 680 DEG C hereinafter, carry out again it is air-cooled, then by calcined impregnation agent composition A and impregnation agent composition B
Mixing, then be vapor-deposited；
Vapor deposition processes are as follows: penetration enhancer and workpiece being heated to 950 under -0.01MPa~-0.02MPa vacuum degree
DEG C~1000 DEG C, then 6 hours~8 hours are kept the temperature, 680 DEG C are cooled to after heat preservation with the furnace hereinafter, carrying out again air-cooled；
Diffusion in vacuum is carried out again after having carried out vapor deposition to test specimen, and the pressure of diffusion in vacuum is less than 6.65 × 10-2Pa,
Starting 6.65~10.64Pa of partial pressure at 800 DEG C, holding temperature is 950 DEG C~1000 DEG C, and soaking time is 1 hour~2 hours,
It is cooled down after heat preservation.
Below by embodiment, the present invention is further illustrated
Embodiment 1
The infiltration cobalt aluminium method of the present embodiment carries out in accordance with the following steps:
Blast processing first is carried out to test specimen before being vapor-deposited, removes the passivating film and penetration enhancer of surface of test piece
Component carries out ingredient, matches impregnation agent composition A: taking cobalt powder 2.4kg, nickel-yittrium alloy powder 0.6kg, aluminium oxide powder 2.0kg, iodate
Ammonium 100g is mixed and stirred for uniformly；With impregnation agent composition B: taking ammonium iodide 120g, ammonium chloride 30g, iron aluminium powder 5.5kg, pure aluminium powder
0.5kg is mixed and stirred for uniformly；
Impregnation agent composition A is calcined again, in Muffle pot, is heated to impregnation agent composition A under the vacuum degree of -0.01MPa
980 DEG C, then 3 hours are kept the temperature, cool to 680 DEG C after heat preservation with the furnace, then carry out air-cooled；
The calcined product of impregnation agent composition A is uniformly mixed with impregnation agent composition B, then the mixture is put into magazine and is placed in horse
Then test specimen is mounted in Muffle pot by not pot bottom, then install Muffle pot, starts to be vapor-deposited, and vapor deposition processes are such as
Under: it is vacuumized using tank body of the mechanical pump to Muffle pot, vacuum degree is -0.01MPa (pressure gauge), will seep tank and is heated to seeping cobalt aluminium
Holding temperature, holding temperature are 980 DEG C, and soaking time is 7 hours, cool to 680 DEG C after heat preservation with the furnace, then to test specimen into
Row is air-cooled；
After test specimen is air-cooled, then diffusion in vacuum is carried out to test specimen, in vacuum diffusion process, pressure is 6.65 × 10-2Pa,
Start to divide 6.65Pa at 800 DEG C, holding temperature is 950 DEG C, and soaking time is 1 hour, is carried out test specimen after heat preservation empty
It is cold.
Embodiment 2
The infiltration cobalt aluminium method of the present embodiment carries out in accordance with the following steps:
Blast processing first is carried out to test specimen before being vapor-deposited, removes the passivating film and penetration enhancer of surface of test piece
Component carries out ingredient, matches impregnation agent composition A: taking cobalt powder 2.4kg, nickel-yittrium alloy powder 0.6kg, aluminium oxide powder 2.0kg, iodate
Ammonium 100g is mixed and stirred for uniformly；With impregnation agent composition B: taking ammonium iodide 120g, ammonium chloride 30g, iron aluminium powder 5.5kg, pure aluminium powder
0.5kg is mixed and stirred for uniformly；
Impregnation agent composition A is calcined again, in Muffle pot, is heated to impregnation agent composition A under the vacuum degree of -0.01MPa
980 DEG C, then 3 hours are kept the temperature, cool to 680 DEG C after heat preservation with the furnace, then carry out air-cooled；
The calcined product of impregnation agent composition A is uniformly mixed with impregnation agent composition B, then the mixture is put into magazine and is placed in horse
Then test specimen is mounted in Muffle pot by not pot bottom, then install Muffle pot, starts to be vapor-deposited, and vapor deposition processes are such as
Under: it is vacuumized using tank body of the mechanical pump to Muffle pot, vacuum degree is -0.01MPa (pressure gauge), will seep tank and is heated to seeping cobalt aluminium
Holding temperature, holding temperature are 1000 DEG C, and soaking time is 6 hours, cool to 680 DEG C after heat preservation with the furnace, then to test specimen
It carries out air-cooled；
After test specimen is air-cooled, then diffusion in vacuum is carried out to test specimen, in vacuum diffusion process, pressure is 6.65 × 10-2Pa,
Start to divide 6.65Pa at 800 DEG C, holding temperature is 950 DEG C, and soaking time is 1 hour, is carried out test specimen after heat preservation empty
It is cold.
Embodiment 3
The infiltration cobalt aluminium method of the present embodiment carries out in accordance with the following steps:
Blast processing first is carried out to test specimen before being vapor-deposited, removes the passivating film and penetration enhancer of surface of test piece
Component carries out ingredient, matches impregnation agent composition A: taking cobalt powder 2.4kg, nickel-yittrium alloy powder 0.6kg, aluminium oxide powder 2.0kg, iodate
Ammonium 100g is mixed and stirred for uniformly；With impregnation agent composition B: taking ammonium iodide 120g, ammonium chloride 30g, iron aluminium powder 5.5kg, pure aluminium powder
0.5kg is mixed and stirred for uniformly；
Impregnation agent composition A is calcined again, in Muffle pot, is heated to impregnation agent composition A under the vacuum degree of -0.01MPa
980 DEG C, then 3 hours are kept the temperature, cool to 680 DEG C after heat preservation with the furnace, then carry out air-cooled；
The calcined product of impregnation agent composition A is uniformly mixed with impregnation agent composition B, then the mixture is put into magazine and is placed in horse
Then test specimen is mounted in Muffle pot by not pot bottom, then install Muffle pot, starts to be vapor-deposited, and vapor deposition processes are such as
Under: it is vacuumized using tank body of the mechanical pump to Muffle pot, vacuum degree is -0.01MPa (pressure gauge), will seep tank and is heated to seeping cobalt aluminium
Holding temperature, holding temperature be 980 DEG C, soaking time be 7 hours 30 points, cool to 680 DEG C after heat preservation with the furnace, then to examination
Part carries out air-cooled；
After test specimen is air-cooled, then diffusion in vacuum is carried out to test specimen, in vacuum diffusion process, pressure is 6.65 × 10-2Pa,
Start to divide 6.65Pa at 800 DEG C, holding temperature is 950 DEG C, and soaking time is 1 hour, is carried out test specimen after heat preservation empty
It is cold.
(a) and Fig. 2 (b) are shown as shown in Figure 1, Figure 2, after test specimen diffusion in vacuum, by Metallographic Analysis, pass through embodiment 1 and seep cobalt
Aluminium process, 30~35 μm of the alloying layer thickness of test specimen, diffusion layer organization is uniformly, continuously；Cobalt element content 6~7%, aluminium element content 24
~26%；Cobalt aluminium process is seeped by embodiment 2,30~34 μm of the alloying layer thickness of test specimen, diffusion layer organization is uniformly, continuously；Cobalt element
Content 6~8%, aluminium element content 29~32%；Cobalt aluminium process is seeped by embodiment 3,32~36 μm of the alloying layer thickness of test specimen seeps
Layer tissue is uniformly, continuously；Cobalt element content 6.5~8%, aluminium element content 28~31%, penetration enhancer of the invention and infiltration cobalt aluminium side
Method makes [Al] and [Go] to reach balance, is adjusted by penetration enhancer material, additive, prefabricated and proportion, in conjunction with infiltration layer technique, is realized
Bianry alloy permeation.
Embodiment 4
The infiltration cobalt aluminium method of the present embodiment carries out in accordance with the following steps:
Blast processing first is carried out to test specimen before being vapor-deposited, removes the passivating film and penetration enhancer of surface of test piece
Component carries out ingredient, matches impregnation agent composition A: taking cobalt powder 1.9kg, nickel-yittrium alloy powder 0.8kg, aluminium oxide powder 1.5kg, iodate
Ammonium 110g is mixed and stirred for uniformly；With impregnation agent composition B: taking ammonium iodide 100g, ammonium chloride 35g, iron aluminium powder 4.5kg, pure aluminium powder
0.7kg is mixed and stirred for uniformly；
Impregnation agent composition A is calcined again, in Muffle pot, is heated to impregnation agent composition A under the vacuum degree of -0.02MPa
850 DEG C, then 3.5 hours are kept the temperature, cool to 650 DEG C after heat preservation with the furnace, then carry out air-cooled；
The calcined product of impregnation agent composition A is uniformly mixed with impregnation agent composition B, then the mixture is put into magazine and is placed in horse
Then test specimen is mounted in Muffle pot by not pot bottom, then install Muffle pot, starts to be vapor-deposited, and vapor deposition processes are such as
Under: it is vacuumized using tank body of the mechanical pump to Muffle pot, vacuum degree is -0.02MPa (pressure gauge), will seep tank and is heated to seeping cobalt aluminium
Holding temperature, holding temperature are 950 DEG C, and soaking time is 7 hours, cool to 650 DEG C after heat preservation with the furnace, then to test specimen into
Row is air-cooled；
After test specimen is air-cooled, then diffusion in vacuum is carried out to test specimen, in vacuum diffusion process, pressure is 6.0 × 10-2Pa,
Start to divide 7.0Pa at 800 DEG C, holding temperature is 980 DEG C, and soaking time is 2 hours, is carried out test specimen after heat preservation air-cooled
?.
Cobalt aluminium process is seeped by embodiment 4,20~25 μm of the alloying layer thickness of test specimen, diffusion layer organization is uniformly, continuously；Cobalt element
Content 6~8%, aluminium element content 23~28%.
Embodiment 5
The infiltration cobalt aluminium method of the present embodiment carries out in accordance with the following steps:
Blast processing first is carried out to test specimen before being vapor-deposited, removes the passivating film and penetration enhancer of surface of test piece
Component carries out ingredient, matches impregnation agent composition A: taking cobalt powder 2.9kg, nickel-yittrium alloy powder 1.1kg, aluminium oxide powder 2.5kg, iodate
Ammonium 120g is mixed and stirred for uniformly；With impregnation agent composition B: taking ammonium iodide 110g, ammonium chloride 40g, iron aluminium powder 5.5kg, pure aluminium powder
0.9kg is mixed and stirred for uniformly；
Impregnation agent composition A is calcined again, in Muffle pot, is heated to impregnation agent composition A under the vacuum degree of -0.015MPa
1000 DEG C, then 4 hours are kept the temperature, cool to 600 DEG C after heat preservation with the furnace, then carry out air-cooled；
The calcined product of impregnation agent composition A is uniformly mixed with impregnation agent composition B, then the mixture is put into magazine and is placed in horse
Then test specimen is mounted in Muffle pot by not pot bottom, then install Muffle pot, starts to be vapor-deposited, and vapor deposition processes are such as
Under: it is vacuumized using tank body of the mechanical pump to Muffle pot, vacuum degree is -0.015MPa (pressure gauge), will seep tank and is heated to seeping cobalt
Aluminium holding temperature, holding temperature are 970 DEG C, and soaking time is 8 hours, cool to 600 DEG C after heat preservation with the furnace, then to test specimen
It carries out air-cooled；
After test specimen is air-cooled, then diffusion in vacuum is carried out to test specimen, in vacuum diffusion process, pressure is 5.5 × 10-2Pa,
Start to divide 8.0Pa at 800 DEG C, holding temperature is 990 DEG C, and soaking time is 1.5 hours, is carried out test specimen after heat preservation empty
It is cold.
Cobalt aluminium process is seeped by embodiment 5,25~35 μm of the alloying layer thickness of test specimen, diffusion layer organization is uniformly, continuously；Cobalt element
Content 6~8%, aluminium element content 25~30%.
Embodiment 6
The infiltration cobalt aluminium method of the present embodiment carries out in accordance with the following steps:
Blast processing first is carried out to test specimen before being vapor-deposited, removes the passivating film and penetration enhancer of surface of test piece
Component carries out ingredient, matches impregnation agent composition A: taking cobalt powder 2.7kg, nickel-yittrium alloy powder 1.0kg, aluminium oxide powder 2.4kg, iodate
Ammonium 100g is mixed and stirred for uniformly；With impregnation agent composition B: taking ammonium iodide 120g, ammonium chloride 35g, iron aluminium powder 5.3kg, pure aluminium powder
1.0kg is mixed and stirred for uniformly；
Impregnation agent composition A is calcined again, in Muffle pot, is heated to impregnation agent composition A under the vacuum degree of -0.02MPa
970 DEG C, then 4 hours are kept the temperature, cool to 500 DEG C after heat preservation with the furnace, then carry out air-cooled；
The calcined product of impregnation agent composition A is uniformly mixed with impregnation agent composition B, then the mixture is put into magazine and is placed in horse
Then test specimen is mounted in Muffle pot by not pot bottom, then install Muffle pot, starts to be vapor-deposited, and vapor deposition processes are such as
Under: it is vacuumized using tank body of the mechanical pump to Muffle pot, vacuum degree is -0.02MPa (pressure gauge), will seep tank and is heated to seeping cobalt aluminium
Holding temperature, holding temperature are 960 DEG C, and soaking time is 8 hours, cool to 550 DEG C after heat preservation with the furnace, then to test specimen into
Row is air-cooled；
After test specimen is air-cooled, then diffusion in vacuum is carried out to test specimen, in vacuum diffusion process, pressure is 5.0 × 10-2Pa,
Start to divide 10.64Pa at 800 DEG C, holding temperature is 1000 DEG C, and soaking time is 2 hours, carries out test specimen after heat preservation
It is air-cooled.
Cobalt aluminium process is seeped by embodiment 6,23~25 μm of the alloying layer thickness of test specimen, diffusion layer organization is uniformly, continuously；Cobalt element
Content 7~8%, aluminium element content 24~29%.
Embodiment 7
The infiltration cobalt aluminium method of the present embodiment carries out in accordance with the following steps:
Blast processing first is carried out to test specimen before being vapor-deposited, removes the passivating film and penetration enhancer of surface of test piece
Component carries out ingredient, matches impregnation agent composition A: taking cobalt powder 2.7kg, nickel-yittrium alloy powder 1.0kg, aluminium oxide powder 2.4kg, iodate
Ammonium 100g is mixed and stirred for uniformly；With impregnation agent composition B: taking ammonium iodide 120g, ammonium chloride 35g, iron aluminium powder 5.3kg, pure aluminium powder
1.0kg is mixed and stirred for uniformly；
Impregnation agent composition A is calcined again, in Muffle pot, is heated to impregnation agent composition A under the vacuum degree of -0.02MPa
1000 DEG C, then 4 hours are kept the temperature, cool to 680 DEG C after heat preservation with the furnace, then carry out air-cooled；
The calcined product of impregnation agent composition A is uniformly mixed with impregnation agent composition B, then the mixture is put into magazine and is placed in horse
Then test specimen is mounted in Muffle pot by not pot bottom, then install Muffle pot, starts to be vapor-deposited, and vapor deposition processes are such as
Under: it is vacuumized using tank body of the mechanical pump to Muffle pot, vacuum degree is -0.02MPa (pressure gauge), will seep tank and is heated to seeping cobalt aluminium
Holding temperature, holding temperature are 1000 DEG C, and soaking time is 8 hours, cool to 680 DEG C after heat preservation with the furnace, then to test specimen
It carries out air-cooled；
After test specimen is air-cooled, then diffusion in vacuum is carried out to test specimen, in vacuum diffusion process, pressure is 4.0 × 10-2Pa,
Start to divide 6.65Pa at 800 DEG C, holding temperature is 1000 DEG C, and soaking time is 2 hours, is carried out test specimen after heat preservation empty
It is cold.
Cobalt aluminium process is seeped by embodiment 7,30~35 μm of the alloying layer thickness of test specimen, diffusion layer organization is uniformly, continuously；Cobalt element
Content 6~7%, aluminium element content 26~32%.
Summarize: infiltration cobalt aluminium penetration enhancer and method through the invention carries out after seeping cobalt aluminium surface of test piece, the cobalt of surface of test piece
Aluminium infiltration layer is fine and close, and uniform continuity is good, and the depth of infiltration layer is 20~35 μm.
Claims (6)
1. a kind of infiltration cobalt aluminium penetration enhancer, which is characterized in that by impregnation agent composition B and impregnation agent composition A or the calcined product with impregnation agent composition A
It is uniformly mixed, in terms of mass fraction, impregnation agent composition A includes following components: 19~29 parts of cobalt powder, nickel-yittrium alloy powder 1~11
Part, 15~25 parts of aluminium oxide powder, 1~1.2 part of ammonium iodide；Impregnation agent composition B includes following components: 1~1.2 part of ammonium iodide,
0.3~0.4 part of ammonium chloride, 45~55 parts of iron aluminium powder, 5~10 parts of pure aluminium powder；
The impregnation agent composition A is calcined in vapor deposition apparatus, and the process of calcining is as follows, in -0.01MPa~-0.02MPa
Vacuum degree under impregnation agent composition A is heated to 950 DEG C~1000 DEG C, then keep the temperature 3 hours~4 hours, it is cold with furnace after heat preservation
But to 680 DEG C hereinafter, carrying out again air-cooled.
2. a kind of infiltration cobalt aluminium penetration enhancer according to claim 1, which is characterized in that in terms of mass fraction, the penetration enhancer group
Dividing A includes 24 parts of cobalt powders, 6 parts of nickel-yittrium alloy powder, 20 parts of aluminium oxide powders, 1 part of ammonium iodide；Impregnation agent composition B includes 1.2 parts
Ammonium iodide, 0.3 part of ammonium chloride, 50 parts of iron aluminium powders, 5 parts of pure aluminium powders.
3. a kind of infiltration cobalt aluminium method, which is characterized in that the calcined product by impregnation agent composition B with impregnation agent composition A or with impregnation agent composition A
It is placed in vapor deposition apparatus and is vapor-deposited together with test specimen after mixing, based on mass fraction, impregnation agent composition A packet
Include 19~29 parts of cobalt powders, 1~11 part of nickel-yittrium alloy powder, 15~25 parts of aluminium oxide powders, 1~1.2 part of ammonium iodide；Penetration enhancer group
Dividing B includes 1.2 parts of ammonium iodides, 0.3~0.4 part of ammonium chloride, 45~55 parts of iron aluminium powders, 5~10 parts of pure aluminium powders；The gas phase is heavy
Product process is as follows, penetration enhancer and workpiece is heated to 950 DEG C~1000 DEG C under -0.01MPa~-0.02MPa vacuum degree, then protect
Temperature 6 hours~8 hours, cools to 680 DEG C with the furnace hereinafter, carrying out again air-cooled after heat preservation；The test specimen is being vapor-deposited
It is preceding that passivating film is removed to its surface；
The impregnation agent composition A is calcined in vapor deposition apparatus, and the process of calcining is as follows, in -0.01MPa~-0.02MPa
Vacuum degree under impregnation agent composition A is heated to 950 DEG C~1000 DEG C, then keep the temperature 3 hours~4 hours, it is cold with furnace after heat preservation
But to 680 DEG C hereinafter, carrying out again air-cooled.
4. a kind of infiltration cobalt aluminium method according to claim 3, which is characterized in that after the test specimen has carried out vapor deposition
Diffusion in vacuum is carried out again.
5. a kind of infiltration cobalt aluminium method according to claim 4, which is characterized in that the pressure of the diffusion in vacuum is less than
6.65×10-2Pa starts 6.65~10.64Pa of partial pressure at 800 DEG C, and holding temperature is 950 DEG C~1000 DEG C, and soaking time is
It 1 hour~2 hours, is cooled down after heat preservation.
6. a kind of infiltration cobalt aluminium method according to claim 3, which is characterized in that the test specimen is before vapor deposition to it
Surface carries out blast processing.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610766143.2A CN106222607B (en) | 2016-08-29 | 2016-08-29 | A kind of infiltration cobalt aluminium penetration enhancer and method |
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| CN201610766143.2A CN106222607B (en) | 2016-08-29 | 2016-08-29 | A kind of infiltration cobalt aluminium penetration enhancer and method |
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| CN106222607A CN106222607A (en) | 2016-12-14 |
| CN106222607B true CN106222607B (en) | 2019-05-07 |
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Address after: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee after: AECC AVIATION POWER CO., LTD. Address before: Weiyang Xu Jia Wan 710021 Shaanxi city of Xi'an Province Patentee before: AVIC AVIATION ENGINE CORPORATION PLC |