CN109290543A - A method of producing high-intensitive near net-shaped metal parts - Google Patents
A method of producing high-intensitive near net-shaped metal parts Download PDFInfo
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- CN109290543A CN109290543A CN201811052890.5A CN201811052890A CN109290543A CN 109290543 A CN109290543 A CN 109290543A CN 201811052890 A CN201811052890 A CN 201811052890A CN 109290543 A CN109290543 A CN 109290543A
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- near net
- ingot blank
- shaped metal
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D17/00—Pressure die casting or injection die casting, i.e. casting in which the metal is forced into a mould under high pressure
- B22D17/007—Semi-solid pressure die casting
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- Mechanical Engineering (AREA)
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Abstract
The present invention discloses a kind of method for producing the near net-shaped part base of high duty metal complicated shape, includes the following steps: that step a) produces metal ingot blank using metal jet forming technology；Step c) is heated to semi-solid temperature to metal ingot blank；Semi-solid-state metal ingot blank is molded near net-shaped metal parts by the techniques such as step d) extruding.Method of the invention can be directly prepared into using the ultrahigh speed solidification of injection forming has the characteristics that fine uniform pelletizing shape tissue, there is better semi-solid die casting characteristic than raw material made of conventional method, it is used directly to the high-intensitive complicated near net-shaped part of production semi-solid-state shaping, has the characteristics that equipment and process flow are at low cost, high-efficient, quality is more stable and reliable.
Description
Technical field
The present invention relates near net-shaped part manufacture field, in particular to a kind of side for producing high-intensitive near net-shaped metal parts
Method.
Background technique
The metal of many complicated shapes, such as aluminium alloy, the near net-shaped part of complexity be to be cast by cast aluminium alloy gold
Shape.But this method is limited by alloy species and technique limitation, and the intensity of traditional die casting is lower, mostly in 100-300MPa model
It encloses, and die casting is easy that there are stomata or interior tissue are loose, it is difficult to reach the requirement of high-end components, metallographic
Figure is as shown in Figure 1.
The metal jet forming technique that last century the seventies occur can be molten metal with the speed of the 10000 degrees second orders of magnitude
Ultrahigh speed condensation, can prepare traditional pressure technology and be difficult to the uniform high alloy material of the fine microstructures produced, what is thus produced is certain
For 7- line aluminium alloy intensity up to 800MPa, metallographic microscope is as shown in Figure 2.But generated just because of metal jet forming technique
The Material Strength of product is higher, so its poor plasticity, this field always is with metal jet forming technique and directly produces
Part base shapes final part by cutting, technique for grinding later.For complicated part, spray the technology of forming although
It can accomplish accurate forming, but design of part is more complicated, more accurate, thickness is just smaller, and the time for causing it to shape gets over
It is long.
Moreover, tissue and performance can become again if the part base of these metal jets forming is carried out remelting die casting again
At very poor level, metallographic microscope is as shown in Figure 3.
Semi-solid forming technology is also the new metal-forming techniques of one kind of last century the seventies invention.Pass through various works
Skill means become the dendrite (as shown in Figure 1) generated in metal solidification process have Semi-Solid Thixoforming characteristic after pelletizing shape is brilliant
With rheology mold-filling capacity under pressure.Compared with traditional die casting, semi-solid-state shaping product has intensity and consistency height, shrinking percentage
The low size shape near net-shaped part more precisely, forming temperature it is lower so that the advantages that die life improves.Semisolid temperature
Degree refers to the temperature of solid-liquid temperature range.The near net-shaped part, after referring to part forming, it is only necessary to which a small amount of processing no longer adds
Work.
There are mainly two types of the methods for preparing semi-solid-state shaping raw metal at present: 1) implementing vibration of ultrasonic wave in process of setting
Method, metallographic microscope are as shown in Figure 4；2) implement thermal agitation method in process of setting, metallographic microscope is as shown in Figure 5.But their technique
Complicated, at high cost, low efficiency.And those skilled in the art devote a tremendous amount of time, energy goes to solve how to allow dendrite can be more
It is good, more evenly, quickly fragmentation the problem of.
Metal jet fabrication strength is high, but the tissue after founding and performance can significantly be deteriorated again, and casting manufacturability
It can be poor.In the process flow of semi-solid-state shaping, and founding again must be carried out to material, so metal jet forming and semisolid
Both forming techniques are emerging parallel technologies, since inherently there is competing situations for the two process flow, and
Each have their own advantage, each have their own disadvantage.For complex parts forming, the forming speed of semi-solid-state shaping is fast, but intensity is low,
The long processing time of metal jet forming, but intensity is high.
The research direction that metal jet forming technology will make high-intensitive near net-shaped metal parts is to speed up each thickness shape
At speed, and the research direction of semi-solid-state shaping is how effectively and quickly to smash dendrite to improving its intensity.Two
The research direction of person is completely different.
Summary of the invention
The technical problem to be solved by the present invention is providing a kind of method for producing high-intensitive near net-shaped metal parts.
The solution that the present invention solves its technical problem is:
A method of high-intensitive near net-shaped metal parts is produced, is included the following steps:
Step a) produces metal ingot blank using metal jet forming technology；
Step c) is heated to semi-solid temperature to metal ingot blank；
Metal ingot blank with semi-solid temperature is formed near net-shaped metal parts with mold with extrusion process by step d).
As a further improvement of the foregoing solution, step c1 is additionally provided between step c) and step d)): to metal ingot blank
Carry out heat preservation 5 seconds to 30 seconds.
As a further improvement of the foregoing solution, in step c), metal ingot blank is heated using electromagnetic inductor.
As a further improvement of the foregoing solution, in step d), the forming process of near net-shaped metal parts is such that mould
Tool includes upper die and lower die, is equipped with the feed inlet section being sequentially connected, flow channel section, type chamber section, upper die and lower die on upper die and lower die
Feed inlet section, flow channel section, type chamber section piece together the feed inlet being sequentially communicated, runner, type chamber, the gold of semi-solid temperature will be in
Belong to ingot blank and be put into feed inlet, squeezes metal ingot blank with the nip roll being adapted to the shape of feed inlet, size, nip roll will be in semisolid
The metal ingot blank of temperature is entered in the type chamber of mold and is filled by narrow runner from the feed inlet of mold, thus
Form near net-shaped metal parts.
As a further improvement of the foregoing solution, the cross-sectional area of runner no more than nip roll cross-sectional area ten/
One.
As a further improvement of the foregoing solution, in step d), volume > type chamber volume+runner body of metal ingot blank
Product, the nip roll pressure stamping to metal ingot blank is known as first pressure, and after the cavity filling for completing mold, nip roll is with second
Pressure carries out pressure maintaining near net-shaped metal parts.
As a further improvement of the foregoing solution, second pressure is generally higher than first pressure, and the dwell time is not less than 3 seconds
As a further improvement of the foregoing solution, the forming process of the near net-shaped metal parts of step d) is such that described
Mold is forging mold, and the mold includes upper die and lower die, and metal ingot blank is placed between upper die and lower die, forging equipment is used
Upper die and lower die are allowed to be molded, to form near net-shaped metal parts.
As a further improvement of the foregoing solution, step b) is additionally provided between step a) and step c): with pressure processing work
Metal ingot blank is processed into the metal ingot blank with single section by skill.
As a further improvement of the foregoing solution, pressure processing craft described in step b) includes hot extrusion, in hot rolling
Any one.
The beneficial effects of the present invention are: since metal ingot blank of the invention is to use made of metal jet forming technology,
The unusual fine uniform of its interior tissue, is not present dendrite.Such metal ingot blank is heated to semi-solid temperature to be unlikely to
Dendrite arm, and good fluidity are generated, so that metal ingot blank is carried out pressure forming, it is high to be used directly to production semi-solid-state shaping
The complicated near net-shaped part of intensity, has the characteristics that equipment and process flow are at low cost, high-efficient, quality is more stable and reliable.This hair
The bright metallic character that tiny rounding metallographic structure is obtained using metal jet forming superelevation condensation rate, it is directly solid as half
The high-intensitive near net-shaped metal parts of state forming blank production, replaces the cumbersome skills for preparing semi-solid-state shaping blank such as tradition stirring
Art, have process flow is brief, quality is high, overall economics high efficiency a little.The present invention is shaped for metal parts.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, make required in being described below to embodiment
Attached drawing is briefly described.Obviously, described attached drawing is a part of the embodiments of the present invention, rather than is all implemented
Example, those skilled in the art without creative efforts, can also be obtained according to these attached drawings other designs
Scheme and attached drawing.
Fig. 1 is the metallographic microscope for casting A390 aluminium alloy；
Fig. 2 is the metallographic microscope of injection forming A390 aluminium alloy；
Fig. 3 is that gold injection forming A390 aluminium alloy re-starts founding metallographic microscope after cooling；
Fig. 4 is metallographic microscope of the A390 aluminum alloy melt using the ingot blank of ultrasonic activation method preparation；
Fig. 5 is metallographic microscope of the A390 aluminum alloy melt using the ingot blank of hot mixing method preparation；
Fig. 6 is the metallographic microscope that A390 aluminium alloy uses near net-shaped metal parts prepared by the present invention.
Specific embodiment
It is carried out below with reference to technical effect of the embodiment and attached drawing to design of the invention, specific structure and generation clear
Chu is fully described by, to be completely understood by the purpose of the present invention, feature and effect.Obviously, described embodiment is this hair
Bright a part of the embodiment, rather than whole embodiments, based on the embodiment of the present invention, those skilled in the art are not being paid
Other embodiments obtained, belong to the scope of protection of the invention under the premise of creative work.In addition, be previously mentioned in text
All connection/connection relationships not singly refer to that component directly connects, and referring to can be added deduct according to specific implementation situation by adding
Few couple auxiliary, to form more preferably coupling structure.Each technical characteristic in the present invention, in the premise of not conflicting conflict
Under can be with combination of interactions.
Referring to Fig. 6, this is the embodiment applied to A390 aluminium alloy of the invention, specifically:
A method of high-intensitive near net-shaped metal parts is produced, is included the following steps:
Step a) produces metal ingot blank using metal jet forming technology；
Step c) is heated to semi-solid temperature to metal ingot blank；
Step d) is shaped with die pressure forms near net-shaped metal zero with mold for the metal ingot blank with semi-solid temperature
Part.
Method of the invention can be directly prepared into using the ultrahigh speed solidification of injection forming with fine uniform pelletizing shape tissue
Semi-solid-state shaping raw material, than raw material made of conventional method have better semi-solid die casting characteristic, it is directly used
It produces the near net-shaped part of semi-solid-state shaping high intensity complicated shape, there is equipment and process flow is at low cost, high-efficient, matter
Measure more stable and reliable feature.Comparison diagram 2, Fig. 6 are it is found that the present invention can not only allow the internal component structure of near net-shaped metal parts
It is finer and close, and substantially maintain injection the tiny spheric grain structure of form metal, Semi-Solid Thixoforming with higher and
Mold-filling capacity is flowed, so that the die forming of complicated shape part is realized, and structure is finer and close, so the present invention can also protect
The characteristic for the high intensity for staying metal jet to shape, and intensity itself and plasticity inherently a pair of contradictory body, but pass through this
The two paradox are exactly combined together by invention.Also that is, the technique of semi-solid-state shaping of the invention avoids shaping injection
Metal material carry out founding again, keep its superior tissue and performance, and then the high intensity for shaping complicated shape is near net-shaped
Part.The crystal grain of traditional semi-solid-state shaping raw material, which is changed into spherical process, to be realized in stirring, vibration.And it is of the invention
Semi-solid-state shaping raw material by injection forming ultrahigh speed solidification directly generate better quality, greatly simplify process flow, drop
Low cost provides part performance.
Step b) is additionally provided between the step a) and step c) of the present embodiment: metal ingot blank being processed with pressure processing craft
At the metal ingot blank with single section.Convenient for the progress of metal ingot blank, accurately intercept, each section of metal ingot blank are made in this way
For the metal ingot blank in step c).
The step b) of the present embodiment be metal ingot blank is compacted into it is rodlike, can will be after cooling in actual production processing
Rodlike metal ingot blank intercept, then by after intercept metal ingot blank carry out step c).
The techniques such as pressure processing described in step b) include hot extrusion, any one in hot rolling.Gold can be improved in this way
The plasticity for belonging to ingot blank, can well eliminate the hole in metal ingot blank, and be conducive to prepare suitable shape and weight
Semi-solid-state shaping raw material base.
There is the hole of a small amount of (about 1% volume) by step b), d inside the metal ingot blank of metal jet forming) after energy
It will effectively be eliminated, the intensity of the energy near net-shaped part of effective guarantee metal.
In order to make the internal and external temperature of metal ingot blank more consistent, step c1 is additionally provided between step c) and step d)): it is right
Metal ingot blank carries out heat preservation 5 seconds to 30 seconds.
In the step c) of the present embodiment, metal ingot blank is heated using electromagnetic inductor, it in this way can be by adjusting frequency
Rate and power well integrally simultaneously heat metal, avoid traditional outside heating method first hot very by the outside of metal ingot blank
To fusing, inside can be only achieved semi-solid temperature, efficiently reduce heating time, realize the control of good bulk temperature, together
When allow the inside and outside of metal ingot blank not occur dendrite again, under the premise of ensuring production efficiency, avoid this
" spray formed material remelting die casting, tissue and performance can be converted back into very poor level again " that invention is recorded in the background technology
Problem.
In step d), the forming process of near net-shaped metal parts is such that mold includes upper die and lower die, upper die and lower die
On be equipped with the feed inlet section being sequentially connected, flow channel section, type chamber section, feed inlet section, flow channel section, the type chamber section of upper die and lower die are spelled
Synthesize the feed inlet, runner, the type chamber that are sequentially communicated, the metal ingot blank in semi-solid temperature be put into feed inlet, with charging
Mouthful shape, size adaptation nip roll squeeze metal ingot blank, nip roll by the metal ingot blank in semi-solid temperature from mold into
Material mouth is entered in the type chamber of mold and is filled by narrow runner, to form near net-shaped metal parts.Due to stream
The cross-sectional area in road is smaller, so the pressure that metal ingot blank is subject in runner can be very big when filling type, can allow so close
The internal structure of net shape metal parts can be more fine and close.The shapes and sizes of the feed inlet of the present embodiment, nip roll, metal ingot blank
It is all the same, it can prevent gas from entering the inside of near net-shaped metal parts to the maximum extent in this way, can also prevent metal surface of ingot blank
Plastic deformation occurs to encase gas, gas is brought into the inside of near net-shaped metal parts.
The cross-sectional area of runner is generally set to 1/10th no more than nip roll cross-sectional area.The cross section of runner
Area is small, can increase crystal grain fusion, the effect of rounding.
In step d), volume > type chamber volume+runner volume of metal ingot blank, nip roll claims the pressure of metal ingot blank
For first pressure, after the cavity filling for completing mold, nip roll carries out pressure maintaining near net-shaped metal parts with second pressure, to keep away
Exempt from gas evolution and is formed loose.The second pressure of the present embodiment is greater than first pressure, and the dwell time is not less than 3 seconds, due to having
The setting of pressure maintaining can ensure the consistency of near net-shaped metal parts well.
It is of course also possible to which metal ingot blank is pressed into global shape with pressure processing craft by metal ingot blank in step b)
Following step b) is then carried out again close near net-shaped metal parts.
Step d) the mold be forging mold, the mold includes upper die and lower die, by metal ingot blank be placed on upper mold and
It between lower die, is molded with forging equipment by upper die and lower die, to form near net-shaped metal parts.
It after the processing for completing near net-shaped part base, can further be machined out, to go deburring, more than runner
Material, can also be further heat-treated.
Better embodiment of the invention is illustrated above, but the present invention is not limited to the embodiment,
Those skilled in the art can also make various equivalent modifications or replacement on the premise of without prejudice to spirit of the invention, this
Equivalent variation or replacement are all included in the scope defined by the claims of the present application a bit.
Claims (10)
1. a kind of method for producing high-intensitive near net-shaped metal parts, characterized by the following steps:
Step a) produces metal ingot blank using metal jet forming technology；
Step c) is heated to semi-solid temperature to metal ingot blank；
Metal ingot blank with semi-solid temperature is formed near net-shaped metal with mold with the method that die pressure shapes by step d)
Part.
2. a kind of method for producing high-intensitive near net-shaped metal parts according to claim 1, it is characterised in that: in step
C) step c1 is additionally provided between step d)): heat preservation 5 seconds to 30 seconds is carried out to metal ingot blank.
3. a kind of method for producing high-intensitive near net-shaped metal parts according to claim 1, it is characterised in that: step c)
In, metal ingot blank is heated using electromagnetic inductor.
4. a kind of method for producing high-intensitive near net-shaped metal parts according to claim 1, it is characterised in that: step d)
In, the forming process of near net-shaped metal parts is such that mold includes upper die and lower die, and successively phase is equipped on upper die and lower die
Feed inlet section even, flow channel section, type chamber section, feed inlet section, flow channel section, the type chamber section of upper die and lower die, which pieces together, to be sequentially communicated
Metal ingot blank in semi-solid temperature is put into feed inlet by feed inlet, runner, type chamber, suitable with shape, the size with feed inlet
The nip roll matched squeezes metal ingot blank, and nip roll will be in the metal ingot blank of semi-solid temperature from the feed inlet of mold, by narrow
Runner is entered in the type chamber of mold and is filled, to form near net-shaped metal parts.
5. a kind of method for producing high-intensitive near net-shaped metal parts according to claim 4, it is characterised in that: runner
Cross-sectional area is not more than 1/10th of nip roll cross-sectional area.
6. a kind of method for producing high-intensitive near net-shaped metal parts according to claim 4, it is characterised in that: step d)
In, volume > type chamber volume+runner volume of metal ingot blank, the nip roll pressure stamping to metal ingot blank is known as first
Pressure, after the cavity filling for completing mold, nip roll carries out pressure maintaining near net-shaped metal parts with second pressure.
7. a kind of method for producing high-intensitive near net-shaped metal parts according to claim 4, it is characterised in that: the second pressure
Power is generally higher than first pressure, and the dwell time is not less than 3 seconds.
8. a kind of method for producing high-intensitive near net-shaped metal parts according to claim 1, it is characterised in that: step d)
The forming process of near net-shaped metal parts is such that the mold is forging mold, and the mold includes upper die and lower die, will
Metal ingot blank is placed between upper die and lower die, is molded with forging equipment by upper die and lower die, to form near net-shaped metal
Part.
9. a kind of method for producing high-intensitive near net-shaped metal parts according to claim 1, it is characterised in that: step a)
It is additionally provided with step b) between step c): metal ingot blank being processed into metal ingot blank with pressure processing craft.
10. a kind of method for producing high-intensitive near net-shaped metal parts according to claim 9, it is characterised in that: step
B) pressure processing craft described in includes hot extrusion, any one in hot rolling.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811052890.5A CN109290543A (en) | 2018-09-10 | 2018-09-10 | A method of producing high-intensitive near net-shaped metal parts |
| PCT/CN2019/105001 WO2020052528A1 (en) | 2018-09-10 | 2019-09-10 | Method for producing high-strength near-net-shaped metal part |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811052890.5A CN109290543A (en) | 2018-09-10 | 2018-09-10 | A method of producing high-intensitive near net-shaped metal parts |
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| CN109290543A true CN109290543A (en) | 2019-02-01 |
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| CN201811052890.5A Pending CN109290543A (en) | 2018-09-10 | 2018-09-10 | A method of producing high-intensitive near net-shaped metal parts |
Country Status (2)
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| CN (1) | CN109290543A (en) |
| WO (1) | WO2020052528A1 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020052528A1 (en) * | 2018-09-10 | 2020-03-19 | 佛山峰合精密喷射成形科技有限公司 | Method for producing high-strength near-net-shaped metal part |
| CN112387968A (en) * | 2020-11-16 | 2021-02-23 | 合肥工业大学 | Process method for preparing high-strength aluminum alloy multi-rib variable-section complex component |
| CN112475294A (en) * | 2020-10-20 | 2021-03-12 | 佛山峰合精密喷射成形科技有限公司 | Method for producing ultra-high silicon aluminum alloy |
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| CN112475294A (en) * | 2020-10-20 | 2021-03-12 | 佛山峰合精密喷射成形科技有限公司 | Method for producing ultra-high silicon aluminum alloy |
| CN112475294B (en) * | 2020-10-20 | 2023-09-19 | 佛山峰合精密喷射成形科技有限公司 | Method for producing ultra-high silicon aluminum alloy |
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Also Published As
| Publication number | Publication date |
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| WO2020052528A1 (en) | 2020-03-19 |
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Application publication date: 20190201 |