CN104889402B - A kind of preparation method of aluminum base powder metallurgy part - Google Patents
A kind of preparation method of aluminum base powder metallurgy part Download PDFInfo
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- CN104889402B CN104889402B CN201510306723.9A CN201510306723A CN104889402B CN 104889402 B CN104889402 B CN 104889402B CN 201510306723 A CN201510306723 A CN 201510306723A CN 104889402 B CN104889402 B CN 104889402B
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Abstract
The present invention relates to a kind of preparation methods of aluminum base powder metallurgy part, the advantages of present invention incorporates powder metallurgical technique and metallic extrusion moldings, by using the extruding punch of different structure, the part of production various shape complexity can be squeezed after sintering, and preparation cost is low；Due in extrusion process, punch-pin constantly moves, flow material, to improve the density of powdered metal parts partial region, make the application part precision with higher and intensity of prepared powder metallurgy gold, and the product with end face step can be processed when squeezing, expand powder smelting field；Due to being closer to the shape of final products using the blank part shape of powder metallurgical technique forming, extruding allowance is small, small to the loss of mold, extends lasting a long time for mold, reduces costs；The utilization rate that powder metallurgy enables aluminum alloy to raw material effectively improves；Preparation method of the invention is simple, high production efficiency, and material mixture ratio, which can according to need, to be adjusted.
Description
Technical field
The present invention relates to powder metallurgical technologies, refer specifically to a kind of preparation method of aluminum base powder metallurgy part.
Background technique
With the development of industry, higher and higher to the requirement of part, by the shadow of cost, delivery cycle and noise etc.
It rings, the part of machining is often difficult to meet the requirements.Powder metallurgy is the technology that can manufacture complex shape part, is had
The characteristics of saving raw material, energy conservation, saving of labor, is suitable for producing in enormous quantities.
In recent years, more and more parts use aluminium base sintered alloy, and General Motors used aluminium base early in 1993
Sintered bearing lid has used tens million of so far, and there is a situation where fail.However, the powder smelting applied on automobile at present
Golden constitutional detail is mainly iron-base part, and aluminum base powder metallurgy part is more rare.Compared with iron-based, the specific strength of aluminium is higher,
Which show aluminum base powder metallurgy parts to be with a wide range of applications on automobile.Aluminum base powder metallurgy part is in addition in light weight
Changing aspect has outside advantage, also has advantage, such as the antirust and demagnetization aspect of part in terms of the post-processing of part.
The die-casting technique of short route is widely used in the production of aluminum alloy part, but there are blanks for the die-casting technique of short route
The disadvantage that processing capacity is big, processing cost is high, stock utilization is low, and due to the limitation of manufacturing method, the material of aluminum alloy part
Ingredient is relatively fixed, and alloying element cannot arbitrarily change, and is not easy to manufacture the product containing high silicon content.Meanwhile die casting is also deposited
In some inherent shortcomings, such as：In casting, the temperature of melt front end is too low, and when phase transformation can generate trace or cold line；It is easy to produce
The defects of angry hole, shrinkage cavity, and microscopic structure is uneven, surface microstructure is thinner, and center portion coarse grains seriously affect the power of part
Learn performance；Most of pack alloys due to be not available for heat treatment and intensity is not high.
In the prior art, the dominant powder metallurgical technology for producing aluminium base sintered part(s) has compacting sintering, isostatic cool pressing blank
Extruding, excellent suitability for press forming, jet deposition, hot isostatic pressing etc..However, precision forging, cold extrusion and ordinary powder metallurgy size work
Skill is complicated, production efficiency is low, it is difficult to meet the large batch of demand of automobile and other industries, meanwhile, the aluminium alloy zero of above-mentioned technique preparation
Part precision is relatively low, be unable to meet production in the demand higher and higher to components precision.
Therefore, it for the preparation method of current aluminum base powder metallurgy part, is improved up for further.
Summary of the invention
The technical problem to be solved by the invention for the present situation of prior art is to provide a kind of aluminum base powder metallurgy parts
Preparation method, the preparation method simple process, high production efficiency, prepared aluminum base powder metallurgy part is with higher strong
Degree and precision, and it is low to mold loss in preparation process, reduce the production cost of part.
The present invention solves technical solution used by above-mentioned technical problem：A kind of preparation side of aluminum base powder metallurgy part
Method, it is characterised in that include the following steps：
(1) designing material forms：By weight percentage, used material includes copper 0~6.0%, magnesium 0~6.0%, zinc
0~7.5%, silicon 0~30%, manganese 0~2.0%, vanadium 0~1.0%, the inevitable impurity no more than 2%, surplus is aluminium；
(2) mixing：It is formed according to the material of step (1), each component be mixed to get mixed powder, and to the mixed powder
It is middle that the organic lubricant for accounting for mixing gross mass 0.2~2% is added；
(3) it suppresses：By mixing obtained by step (2) under the pressure greater than 200~700MPa, it is pressed into density and is greater than
2.20g/cm3Part green compact；
(4) it is sintered：Part green compact obtained by step (3) are sintered in non-oxidizing atmosphere, sintering temperature is 550~
660 DEG C, sintering time is greater than 10min；
(5) sintering post-processing：Sandblasting deburring processing is carried out to sintered blank obtained by step (4)；
(6) it squeezes：Part green compact obtained by step (5) are squeezed, extruding depth is 1~30mm.
As a further improvement of the present invention, aluminium described in step (1) with aluminium powder, Al-Mg alloy, Al-Si alloy,
Al-Zn alloy, Al-Mn alloy, any one or more in Al-V alloy form be added.
Further, the aluminium powder is adopted as atomizing aluminium powder, and for oxygen content less than 0.02%, silicone content is small in the atomizing aluminium powder
In 0.05%, the suppression performance of the atomizing aluminium powder is greater than 2.60g/cm at 250MPa3, the apparent density of the atomizing aluminium powder is greater than
1.05g/cm3, the particle size range of the atomizing aluminium powder is 10~150 μm.
As an improvement, any one in the Al-Mg alloy, Al-Si alloy, Al-Zn alloy, Al-Mn alloy, Al-V alloy
The oxygen content of kind is less than 0.02%, and granularity is less than 10 μm.
Preferably, the briquetting pressure of part green compact is 250~620MPa in step (3).
Preferably, part green compact are first preheated to temperature higher than room temperature before being squeezed in step (6) part green compact and
Lower than 520 DEG C.
It improves again, after the completion of step (6), part is dissolved, is quenched, deformation and ageing treatment, the temperature of solution treatment
Degree is 450~550 DEG C, the time is greater than 20min；Hardening media is water or oil；Deformation ratio 0~5%；Timeliness is strain ageing, certainly
Right timeliness, bipolar timeliness carry out one of artificial peak timeliness at 120~180 DEG C, and the level-one aging temp of bipolar timeliness is
170~250 DEG C, secondary aging temperature is 120~180 DEG C.
In the above embodiments, in extrusion process described in step (6), the extruding punch of use includes guide section and connection
Sizing section in the guide section upper end, it is 125 °~130 ° coniform that the guide section, which is shaped to coning angle,.
Preferably, in extrusion process described in step (6), the extruding punch of use includes guide section and is connected to the guiding
The sizing section of Duan Shangduan, the guide section are shaped to the circular cone shape that upper end is big, lower end is small, and the bevel edge of the frustum of a cone section with
Formed acute angle is 3 °~5 ° between bottom edge.
Preferably, in extrusion process described in step (6), the extruding punch of use includes guide section and is connected to the guiding
The sizing section of Duan Shangduan, end face diameter is gradually reduced the guide section from top to bottom and side is shaped to arc surface.
In the above embodiments, the non-oxidizing atmosphere is the nitrogen that oxygen content is lower than -40 DEG C lower than 10PPM, dew point
Gas or argon atmosphere.
Compared with the prior art, the advantages of the present invention are as follows：
The advantages of present invention incorporates powder metallurgical technique and metallic extrusion moldings, it is convex by using the extruding of different structure
Mould, can squeeze the part of production various shape complexity after sintering, and prepare complex-shaped part needs in the prior art
Using expensive CNC press, preparation method preparation cost of the invention is lower；
Simultaneously as in extrusion process, punch-pin constantly moves, flow material, to improve powder metallurgy
The subregional density of Components, makes the application part precision with higher and intensity of prepared powder metallurgy gold, and squeezes
When can process the product with end face step, expanded powder smelting field；
Due to being closer to the shape of final products using the blank part shape of powder metallurgical technique forming, squeeze
Surplus is small, small to the loss of mold, extends lasting a long time for mold to a certain extent, reduces costs；Also, powder smelting
Gold is a kind of technology of near-net-shape, and the utilization rate for enabling aluminum alloy to raw material effectively improves；
Preparation method of the invention is simple, high production efficiency, and selected material mixture ratio, which can according to need, to be adjusted,
And aluminium is with any one or more in aluminium powder, Al-Mg alloy, Al-Si alloy, Al-Zn alloy, Al-Mn alloy, Al-V alloy
Form is added, and further the content adjusting for each component in material is provided convenience.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of extruding punch in the embodiment of the present invention 1,2；
Fig. 2 is the structural schematic diagram of extruding punch in the embodiment of the present invention 3,4；
Fig. 3 is the structural schematic diagram of extruding punch in the embodiment of the present invention 5,6；
Structural schematic diagram when Fig. 4 is extruding punch progress single side extruding in Fig. 1；
Structural schematic diagram when Fig. 5 is extruding punch progress two-sided extrusion in Fig. 1；
Structural schematic diagram when Fig. 6 is extruding punch progress single side extruding in Fig. 2；
Structural schematic diagram when Fig. 7 is extruding punch progress two-sided extrusion in Fig. 2；
Structural schematic diagram when Fig. 8 is extruding punch progress single side extruding in Fig. 3；
Structural schematic diagram when Fig. 9 is extruding punch progress two-sided extrusion in Fig. 3；
Figure 10 is the shape appearance figure that part green compact are not squeezed and deformed；
Figure 11 is the deformed organization chart of part green body extrusion in the embodiment of the present invention 1.
Specific embodiment
The present invention will be described in further detail below with reference to the embodiments of the drawings.
Embodiment 1：
The preparation method of aluminum base powder metallurgy part includes the following steps in the present embodiment：
(1) designing material forms：By weight percentage, used material is atomizing aluminium powder, oxygen content in atomizing aluminium powder
Less than 0.02%, for silicone content less than 0.05%, the suppression performance of the atomizing aluminium powder is greater than 2.60g/cm at 250MPa3, the mist
The apparent density for changing aluminium powder is greater than 1.05g/cm3, the particle size range of the atomizing aluminium powder is 10~150 μm；
(2) mixing：It is formed according to the material of step (1), each component be mixed to get mixed powder, and to the mixed powder
It is middle that the organic lubricant for accounting for mixing gross mass 0.2% is added；
(3) it suppresses：By mixing obtained by step (2) under the pressure greater than 300MPa, being pressed into density is 2.65g/cm3's
Part green compact；
(4) it is sintered：Nitrogen gas by part green compact obtained by step (3) in oxygen content lower than 10PPM, dew point lower than -40 DEG C
It is sintered in atmosphere, sintering temperature is 620 DEG C, sintering time 40min；
(5) sintering post-processing：Sandblasting deburring processing, abrasive material used by sandblasting are carried out to sintered blank obtained by step (4)
For alumina particle, for particle size less than 200 μm, blast time is 40 seconds；
(6) it squeezes：Part green compact are first preheated to 500 DEG C, then part green compact are squeezed, squeezing depth is
25mm；As shown in Figure 1, used extruding punch includes guide section and the sizing section for being connected to the guide section upper end, guide section
Being shaped to cone angle alpha is 125 ° coniform；As shown in figure 4, Fig. 4 a, 4b, 4c are respectively to require to use the extruding according to different
Punch-pin carries out the structural schematic diagram of single side extruding to part green compact, wherein 4a ', 4b ', 4c ' are to require to squeeze using this according to different
Belling mould carries out the top view of single side extruding to part green compact, and 4a ", 4b ", 4c " are to require to use the extruding punch according to different
Part green compact are carried out with the cross-sectional view of single side extruding；As shown in Figure 10,11, after squeezing, the tissue density of part green compact becomes larger；
(7) sintering post-processing：Part is dissolved, is quenched, deformation and ageing treatment, and according to drawing requirement to part
It carries out processing and reaches final size requirement.
Embodiment 2：
The preparation method of aluminum base powder metallurgy part includes the following steps in the present embodiment：
(1) designing material forms：By weight percentage, used material is composed of the following components：Copper 4.5%, magnesium
1.0%, vanadium 0.5%, silicon 1.0%, the inevitable impurity no more than 2%, surplus is aluminium；Wherein, Mg is with Al-Mg master alloy powder
Form be added, Mg content is 25wt.% in Al-Mg alloy female powder；Si is added in the form of Al-Si master alloy powder, and Al-Si is closed
Si content is 37wt.% in golden female powder；Copper is added in the form of electrolytic copper powder；V is added in the form of Al-V master alloy powder, Al-V
V content is 5wt.% in master alloy powder；Remaining aluminium is added in the form of aluminium powder；Remaining aluminium is added in the form of aluminium powder；
(2) mixing：It is formed according to the material of step (1), each component be mixed to get mixed powder, and to the mixed powder
It is middle that the organic lubricant for accounting for mixing gross mass 2% is added；
(3) it suppresses：By mixing obtained by step (2) under the pressure greater than 400MPa, being pressed into density is 2.66g/cm3's
Part green compact；
(4) it is sintered：Argon gas gas by part green compact obtained by step (3) in oxygen content lower than 10PPM, dew point lower than -40 DEG C
It is sintered in atmosphere, sintering temperature is 595 DEG C, sintering time 45min；
(5) sintering post-processing：Sandblasting deburring processing, abrasive material used by sandblasting are carried out to sintered blank obtained by step (4)
For steel sand, for particle size less than 200 μm, blast time is 45 seconds；
(6) it squeezes：Part green compact are first preheated to 400 DEG C, then squeeze part green compact, squeezing depth is
10mm；As shown in Figure 1, used extruding punch includes guide section and the sizing section for being connected to the guide section upper end, guide section
Being shaped to cone angle alpha is 130 ° coniform；As shown in figure 5, Fig. 5 a, 5b, 5c are respectively to require to use the extruding according to different
Punch-pin carries out the structural schematic diagram of two-sided extrusion to part green compact, wherein 5a ', 5b ', 5c ' are to require to squeeze using this according to different
Belling mould carries out the top view of two-sided extrusion to part green compact, and 5a ", 5b ", 5c " are to require to use the extruding punch according to different
Part green compact are carried out with the cross-sectional view of two-sided extrusion；
(7) sintering post-processing：Part is dissolved, is quenched, deformation and ageing treatment, and according to drawing requirement to part
It carries out processing and reaches final size requirement.
Embodiment 3：
The preparation method of aluminum base powder metallurgy part includes the following steps in the present embodiment：
(1) designing material forms：By weight percentage, used material is composed of the following components：Copper 5.0%, magnesium
0.55%, zinc 0.55%, manganese 2.0%, silicon 0.8%, the inevitable impurity no more than 2%, surplus is aluminium；Wherein, Mg is with Al-
The form of Mg master alloy powder is added, and Mg content is 50wt.% in Al-Mg alloy female powder；Si is added in the form of Al-Si master alloy powder
Enter, Si content is 25wt.% in Al-Si alloy female powder；Zn is added in the form of Al-Zn master alloy powder, Zn in Al-Zn alloyed powder
Content is 10wt.%；Copper is added in the form of electrolytic copper powder；Mn is added in the form of Al-Mn master alloy powder, Al-Mn alloyed powder
Middle Mn content is 10wt.%；Remaining aluminium is added in the form of aluminium powder；
(2) mixing：It is formed according to the material of step (1), each component be mixed to get mixed powder, and to the mixed powder
It is middle that the organic lubricant for accounting for mixing gross mass 1% is added；Double cone mixer is used when mixing, batch mixer revolving speed is 15rpm, mixing
Time 30min；
(3) it suppresses：By mixing obtained by step (2) under the pressure greater than 250MPa, being pressed into density is 2.61g/cm3's
Part green compact；
(4) it is sintered：Nitrogen gas by part green compact obtained by step (3) in oxygen content lower than 10PPM, dew point lower than -40 DEG C
It is sintered in atmosphere, sintering temperature is 550 DEG C, sintering time 60min；
(5) sintering post-processing：Sandblasting deburring processing, abrasive material used by sandblasting are carried out to sintered blank obtained by step (4)
For alumina particle, for particle size less than 200 μm, blast time is 50 seconds；
(6) it squeezes：Part green compact are first preheated to 300 DEG C, then squeeze part green compact, squeezing depth is
15mm；As shown in Fig. 2, the extruding punch used includes guide section and the sizing section for being connected to the guide section upper end, guide section at
Type is the circular cone shape that upper end is big, lower end is small, and formed acute angles beta is 3 ° between the bevel edge and bottom edge of the frustum of a cone section；Such as
Shown in Fig. 6, Fig. 6 a, 6b, 6c are respectively according to the different knots for requiring to carry out part green compact using the extruding punch single side extruding
Structure schematic diagram, wherein 6a ', 6b ', 6c ' are to require to carry out single side extruding to part green compact using the extruding punch according to different
Top view, 6a ", 6b ", 6c " are according to the different cross-sectional views for requiring to carry out part green compact using the extruding punch single side extruding；
(7) sintering post-processing：Part is dissolved, is quenched, deformation and ageing treatment, and according to drawing requirement to part
It carries out processing and reaches final size requirement.
Embodiment 4：
The preparation method of aluminum base powder metallurgy part includes the following steps in the present embodiment：
(1) designing material forms：By weight percentage, used material is composed of the following components：Magnesium 0.6%, silicon
30%, the inevitable impurity no more than 2%, surplus is aluminium；Wherein, Mg is added in the form of Al-Mg master alloy powder, Al-Mg
Mg content is 50wt.% in alloy female powder；Si is added in the form of Al-Si master alloy powder, and Si content is in Al-Si alloy female powder
25wt.%；Remaining aluminium is added in the form of aluminium powder；
(2) mixing：It is formed according to the material of step (1), each component be mixed to get mixed powder, and to the mixed powder
It is middle that the organic lubricant for accounting for mixing gross mass 1.5% is added；Double cone mixer is used when mixing, batch mixer revolving speed is 15rpm, is mixed
Expect time 30min；
(3) it suppresses：By mixing obtained by step (2) under the pressure greater than 700MPa, being pressed into density is 2.68g/cm3's
Part green compact；
(4) it is sintered：Nitrogen gas by part green compact obtained by step (3) in oxygen content lower than 10PPM, dew point lower than -40 DEG C
It is sintered in atmosphere, sintering temperature is 660 DEG C, sintering time 20min；
(5) sintering post-processing：Sandblasting deburring processing, abrasive material used by sandblasting are carried out to sintered blank obtained by step (4)
For steel sand, for particle size less than 200 μm, blast time is 55 seconds；
(6) it squeezes：Part green compact are first preheated to 200 DEG C, then squeeze green compact, extruding depth is 30mm；Such as
Shown in Fig. 2, the extruding punch of use includes guide section and the sizing section for being connected to the guide section upper end, and guide section is shaped to upper end
Greatly, the small circular cone shape in lower end, and formed acute angles beta is 5 ° between the bevel edge and bottom edge of the frustum of a cone section；As shown in fig. 7,
Fig. 7 a, 7b, 7c are respectively the structural schematic diagrams that using the extruding punch part green compact are carried out with two-sided extrusion according to different requirements,
Wherein, 7a ', 7b ', 7c ' are the top views that using the extruding punch part green compact are carried out with two-sided extrusion according to different requirements,
7a ", 7b ", 7c " are according to the different cross-sectional views for requiring to carry out part green compact using the extruding punch two-sided extrusion；
(7) sintering post-processing：Part is dissolved, is quenched, deformation and ageing treatment, and according to drawing requirement to part
It carries out processing and reaches final size requirement.
Embodiment 5：
The preparation method of aluminum base powder metallurgy part includes the following steps in the present embodiment：
(1) designing material forms：By weight percentage, used material is composed of the following components：
Copper 1.6%, magnesium 2.55%, zinc 5.6%, the inevitable impurity no more than 2%, surplus is aluminium；Wherein, Mg with
The form of Al-Mg master alloy powder is added, and Mg content is 50wt.% in Al-Mg alloy female powder；Zn is with the shape of Al-Zn master alloy powder
Formula is added, and Zn content is 25wt.% in Al-Zn alloy female powder；Copper is added in the form of electrolytic copper powder；Remaining aluminium is with the shape of aluminium powder
Formula is added；
(2) mixing：It is formed according to the material of step (1), each component be mixed to get mixed powder, and to the mixed powder
It is middle that the organic lubricant for accounting for mixing gross mass 0.8% is added；Double cone mixer is used when mixing, batch mixer revolving speed is 15rpm, is mixed
Expect time 30min；
(3) it suppresses：By mixing obtained by step (2) under the pressure greater than 620MPa, being pressed into density is 2.65g/cm3's
Part green compact；
(4) it is sintered：Nitrogen gas by part green compact obtained by step (3) in oxygen content lower than 10PPM, dew point lower than -40 DEG C
It is sintered in atmosphere, sintering temperature is 600 DEG C, sintering time 45min；
(5) sintering post-processing：Sandblasting deburring processing, abrasive material used by sandblasting are carried out to sintered blank obtained by step (4)
For alumina particle, for particle size less than 200 μm, blast time is 60 seconds；
(6) it squeezes：Part green compact are first preheated to 100 DEG C, then squeeze part green compact, squeezing depth is
20mm；As shown in figure 3, the extruding punch used includes guide section and the sizing section for being connected to the guide section upper end, guide section is certainly
It is upper and lower end surface diameter is gradually reduced and side is shaped to arc surface；As shown in figure 8, Fig. 8 a, 8b, 8c are respectively to be wanted according to difference
Seek the structural schematic diagram that using the extruding punch part green compact are carried out with single side extruding, wherein 8a ', 8b ', 8c ' are according to difference
It is required that using the extruding punch part green compact are carried out with the top view of single side extruding, 8a ", 8b ", 8c " are to be adopted according to different requirements
With the extruding punch part green compact are carried out with the cross-sectional view of single side extruding；
(7) sintering post-processing：Part is dissolved, is quenched, deformation and ageing treatment, and according to drawing requirement to part
It carries out processing and reaches final size requirement.
Embodiment 6：
The preparation method of aluminum base powder metallurgy part includes the following steps in the present embodiment：
(1) designing material forms：By weight percentage, used material is composed of the following components：
Copper 1.6%, zinc 5.6%, vanadium 1.0%, the inevitable impurity no more than 2%, surplus is aluminium；Wherein, Zn is with Al-
The form of Zn master alloy powder is added, and Zn content is 25wt.% in Al-Zn alloy female powder；Copper is added in the form of electrolytic copper powder；V
It is added in the form of Al-V master alloy powder, V content is 5wt.% in Al-V master alloy powder；Remaining aluminium is added in the form of aluminium powder；
(2) mixing：It is formed according to the material of step (1), each component be mixed to get mixed powder, and to the mixed powder
It is middle that the organic lubricant for accounting for mixing gross mass 0.8% is added；Double cone mixer is used when mixing, batch mixer revolving speed is 15rpm, is mixed
Expect time 30min；
(3) it suppresses：By mixing obtained by step (2) under the pressure greater than 500MPa, being pressed into density is 2.64g/cm3's
Part green compact；
(4) it is sintered：Nitrogen gas by part green compact obtained by step (3) in oxygen content lower than 10PPM, dew point lower than -40 DEG C
It is sintered in atmosphere, sintering temperature is 580 DEG C, sintering time 50min；
(5) sintering post-processing：Sandblasting deburring processing, abrasive material used by sandblasting are carried out to sintered blank obtained by step (4)
For alumina particle, for particle size less than 200 μm, blast time is 40 seconds；
(6) it squeezes：Part green compact are first preheated to 50 DEG C, then squeeze part green compact, extruding depth is 10mm；
As shown in figure 3, the extruding punch used includes guide section and the sizing section for being connected to the guide section upper end, guide section is from top to bottom
End face diameter is gradually reduced and side is shaped to arc surface；As shown in figure 9, Fig. 9 a, 9b, 9c are respectively to be used according to different requirements
The extruding punch carries out the structural schematic diagram of two-sided extrusion to part green compact, wherein 9a ', 9b ', 9c ' are to be adopted according to different requirements
With the extruding punch part green compact are carried out with the top view of two-sided extrusion, 9a ", 9b ", 9c " are to require to squeeze using this according to different
Belling mould carries out the cross-sectional view of two-sided extrusion to part green compact.
(7) sintering post-processing：Part is dissolved, is quenched, deformation and ageing treatment, and according to drawing requirement to part
It carries out processing and reaches final size requirement.
Claims (5)
1. a kind of preparation method of aluminum base powder metallurgy part, it is characterised in that include the following steps：
(1) designing material forms：By weight percentage, used material include copper 0~6.0%, magnesium 0~6.0%, zinc 0~
7.5%；Silicon 0~30%, manganese 0~2.0%, vanadium 0~1.0%, the inevitable impurity no more than 2%, surplus is aluminium；
(2) mixing：It is formed according to the material of step (1), each component is carried out to be mixed to get mixed powder, and added into the mixed powder
Enter to account for the organic lubricant of mixing gross mass 0.2~2%；
(3) it suppresses：By mixing obtained by step (2) under the pressure greater than 200~700MPa, density is pressed into greater than 2.20g/cm3
Part green compact；
(4) it is sintered：Part green compact obtained by step (3) are sintered in non-oxidizing atmosphere, sintering temperature is 550~660
DEG C, sintering time is greater than 10min；
(5) sintering post-processing：Sandblasting deburring processing is carried out to sintered blank obtained by step (4)；
(6) it squeezes：Part green compact obtained by step (5) are squeezed, extruding depth is 1~30mm；It is carried out to part green compact
Part green compact are first preheated to temperature higher than room temperature and lower than 520 DEG C before squeezing；Part is dissolved, is quenched, deformation it is timely
Effect processing, the temperature of solution treatment is 450~550 DEG C, the time is greater than 20min；Hardening media is water or oil；Deformation ratio 0~
5%；Timeliness is strain ageing, natrual ageing, carries out one of artificial aging, two-stage time effect, twin-stage at 120~180 DEG C
The level-one aging temp of timeliness is 170~250 DEG C, and secondary aging temperature is 120~180 DEG C；
The extruding punch used in the step includes guide section and the sizing section for being connected to the guide section upper end, the guide section at
Type is that coning angle is 125 °~130 ° coniform；Alternatively,
Extruding punch includes guide section and the sizing section for being connected to the guide section upper end, the guide section be shaped to upper end it is big, under
Small circular cone shape is held, and formed acute angle is 3 °~5 ° between the side and bottom surface of the frustum of a cone；Alternatively,
Extruding punch includes guide section and the sizing section for being connected to the guide section upper end, guide section end face diameter from top to bottom
It is gradually reduced and side is shaped to arc surface.
2. the preparation method of aluminum base powder metallurgy part according to claim 1, it is characterised in that：Described in step (1)
Aluminium with any one or more in aluminium powder, Al-Mg alloy, Al-Si alloy, Al-Zn alloy, Al-Mn alloy, Al-V alloy
Form is added.
3. the preparation method of aluminum base powder metallurgy part according to claim 2, it is characterised in that：The aluminium powder adopt for
Atomizing aluminium powder, oxygen content is less than 0.02% in the atomizing aluminium powder, and less than 0.05%, the suppression performance of the atomizing aluminium powder exists silicone content
It is greater than 2.60g/cm under 250MPa3, the apparent density of the atomizing aluminium powder is greater than 1.05g/cm3, the particle size range of the atomizing aluminium powder is
10~150 μm.
4. the preparation method of aluminum base powder metallurgy part according to claim 2, it is characterised in that：The Al-Mg alloy,
Al-Si alloy, Al-Zn alloy, Al-Mn alloy, any one in Al-V alloy oxygen content less than 0.02%, granularity is less than 10
μm。
5. the preparation method of aluminum base powder metallurgy part according to claim 1, it is characterised in that：Part in step (3)
The briquetting pressure of green compact is 250~620MPa.
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| CN105463276B (en) * | 2015-12-21 | 2017-04-26 | 东睦新材料集团股份有限公司 | Preparation method of aluminium base powder metallurgy part with densifying surface |
| JP2018010087A (en) * | 2016-07-12 | 2018-01-18 | 日本軽金属株式会社 | Pellicle frame and pellicle |
| CN106399764B (en) * | 2016-09-24 | 2019-01-18 | 上海大学 | Powder metallurgy aluminium-silicon-serpentine Antifriction Composites and preparation method thereof |
| CN106521380A (en) * | 2016-12-29 | 2017-03-22 | 湖南工业大学 | Hot quenching new process and application of large-size high-strength aluminum alloy forgings |
| CN107904453A (en) * | 2017-11-22 | 2018-04-13 | 宁波华源精特金属制品有限公司 | A kind of engine rod piece |
| CN109128155B (en) * | 2018-08-02 | 2024-02-06 | 重庆材料研究院有限公司 | Method for manufacturing blind pipe by powder metallurgy isostatic pressing |
| CN109022971B (en) * | 2018-08-31 | 2019-12-03 | 中南大学 | A kind of powder metallurgy 2xxx aluminium alloy sheet and application |
| CN110184487B (en) * | 2019-06-03 | 2021-06-22 | 东睦新材料集团股份有限公司 | Powder metallurgy aluminum-based material and preparation method thereof |
| WO2021118393A1 (en) * | 2019-12-13 | 2021-06-17 | Акционерное Общество "Объединенная Компания Русал Уральский Алюминий" | Powdered aluminium material |
| CN111961929A (en) * | 2020-07-17 | 2020-11-20 | 中南大学 | Si/Ge-containing high-performance powder metallurgy Al-Cu-Mg alloy and preparation method thereof |
| CN112760526A (en) * | 2020-12-08 | 2021-05-07 | 东睦新材料集团股份有限公司 | Powder metallurgy aluminum alloy chain wheel or gear and preparation method thereof |
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