CN106498224A - A kind of cloth pressing foot - Google Patents
A kind of cloth pressing foot Download PDFInfo
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- CN106498224A CN106498224A CN201611063519.XA CN201611063519A CN106498224A CN 106498224 A CN106498224 A CN 106498224A CN 201611063519 A CN201611063519 A CN 201611063519A CN 106498224 A CN106498224 A CN 106498224A
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C1/00—Making non-ferrous alloys
- C22C1/10—Alloys containing non-metals
- C22C1/1036—Alloys containing non-metals starting from a melt
- C22C1/1073—Infiltration or casting under mechanical pressure, e.g. squeeze casting
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C21/00—Alloys based on aluminium
- C22C21/06—Alloys based on aluminium with magnesium as the next major constituent
- C22C21/08—Alloys based on aluminium with magnesium as the next major constituent with silicon
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0005—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with at least one oxide and at least one of carbides, nitrides, borides or silicides as the main non-metallic constituents
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/001—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides
- C22C32/0015—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with only oxides with only single oxides as main non-metallic constituents
- C22C32/0036—Matrix based on Al, Mg, Be or alloys thereof
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C32/00—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ
- C22C32/0047—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents
- C22C32/0068—Non-ferrous alloys containing at least 5% by weight but less than 50% by weight of oxides, carbides, borides, nitrides, silicides or other metal compounds, e.g. oxynitrides, sulfides, whether added as such or formed in situ with carbides, nitrides, borides or silicides as the main non-metallic constituents only nitrides
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22F—CHANGING THE PHYSICAL STRUCTURE OF NON-FERROUS METALS AND NON-FERROUS ALLOYS
- C22F1/00—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working
- C22F1/04—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon
- C22F1/047—Changing the physical structure of non-ferrous metals or alloys by heat treatment or by hot or cold working of aluminium or alloys based thereon of alloys with magnesium as the next major constituent
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- D—TEXTILES; PAPER
- D05—SEWING; EMBROIDERING; TUFTING
- D05B—SEWING
- D05B29/00—Pressers; Presser feet
- D05B29/06—Presser feet
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Textile Engineering (AREA)
- Manufacture Of Alloys Or Alloy Compounds (AREA)
Abstract
The invention belongs to textile technology field, is related to a kind of cloth pressing foot.The cloth pressing foot is made up of foam carbon skeleton reinforced aluminum matrix composites, and foam carbon skeleton reinforced aluminum matrix composites are mainly composited by pressure infiltration by the alloy matrix aluminum of foam carbon skeleton and surplus that volume ratio is 30 50%.As skeleton foam carbon density is little, intensity is high, the mechanical property of alloy matrix aluminum is good, and foam carbon skeleton has good Interface adhesive strength with alloy matrix aluminum, therefore, foam carbon skeleton is obtained by pressure infiltration technology to be tightly combined with matrix, border is clearly demarcated, and interface is without microdefects such as holes, there is higher mechanical strength, toughness, wearability, combination property is more preferable.
Description
Technical field
The invention belongs to textile technology field, is related to a kind of sewing machine component, more particularly to a kind of cloth pressing foot.
Background technology
Cloth pressing foot, also known as presser feet, is that stressed component applied on sewing surface by sewing machine.After long service, compress
The main damage forms of pin are fatigue fracture, excessive abrasion, deformation etc..Therefore, the initial stage is designed, and the condition of work of cloth pressing foot is required
Which has higher intensity, wearability and anti-fatigue performance, requires that there is enough rigidity and toughness etc. again.
At present, in the processing technology of traditional cloth pressing foot, its material typically adopts quenched and tempered steel, aluminium alloy etc..Wherein, aluminium is closed
The density of golden material is low, and, near or above high-quality steel, plasticity is good for intensity, thermal conductivity and excellent corrosion resistance, and easy to process, is mesh
One of front main material for preparing sewing machine accessory.Through long-run development, sewing machine spare and accessory parts have been prepared using aluminum alloy materials
Through in a kind of stable state, being technically difficult to break through.Therefore, in prior art basis, closed using conventional aluminum
Prepared by gold, it is difficult to obtain the cloth pressing foot that a kind of combination property is able to break through.
Content of the invention
The purpose of the present invention is for the above-mentioned problems in the prior art, it is proposed that a kind of using the increasing of foam carbon skeleton
Strong aluminum matrix composite is made, the more excellent cloth pressing foot of combination property.
The purpose of the present invention can be realized by following technical proposal：A kind of cloth pressing foot, the cloth pressing foot is by foamy carbon bone
Frame reinforced aluminum matrix composites are made, and the foam carbon skeleton reinforced aluminum matrix composites are mainly by volume ratio for 30-50%'s
The alloy matrix aluminum of foam carbon skeleton and surplus is composited by pressure infiltration.
In a kind of above-mentioned cloth pressing foot, the foam carbon skeleton reinforced aluminum matrix composites include that volume ratio is 5-15%
Hard abrasive particles and volume ratio be the foam carbon skeleton of 30-50%, the alloy matrix aluminum of 35-65% answered by pressure infiltration
Conjunction is formed.
Cloth pressing foot of the present invention is made using foam carbon skeleton reinforced aluminum matrix composites, wherein, foamy carbon be one kind by hole
Bubble and the light porous material with tridimensional network of the hole steep that wall composition being connected with each other, except with material with carbon element routinely
Can be outer, foamy carbon also has characteristic and the good process based prediction models such as density little, intensity is high, anti-thermal shock, easy processing, passes through
Compound with aluminum alloy materials, it is possible to obtain high performance structural material.With enhancing aluminum alloy materials phases such as traditional whisker, particles
Than, they have higher mechanical strength and toughness, and, during long service, will not be as particle, the aluminium of whisker reinforcement
Based composites are the same, and reinforcement is present easily extracts from matrix, comes off, the defect of chip formation hard abrasive.Therefore, this
The cloth pressing foot that bright foam carbon skeleton reinforced aluminum matrix composites are made has more preferable combination property.
In a kind of above-mentioned cloth pressing foot, the aperture of the foam carbon skeleton is 100-300 μm, and percent opening is 80-90%.
Preferably, the foamy carbon skeleton surface is formed with strengthening layer, the strengthening layer is metal and its compound layer,
Strengthening layer is obtained by chemical vapor infiltration or sedimentation.Strengthening layer is formed in foam carbon surface and can both improve the anti-of foamy carbon
The performances such as oxidation, erosion resistant, can improve the mechanical properties such as the intensity of foamy carbon again.
In a kind of above-mentioned cloth pressing foot, the alloy matrix aluminum is by following mass percent into being grouped into：Si：0.4-
0.8%, Mg：0.8-1.2%, Mn：0.13-0.17%, Cr：0.08-0.22%, Cu：0.11-0.16%, Zn：0.18-
0.22%, Zr：0.12-0.15%, Ti：0.11-0.15%, Sc：0.03-0.05%, Sb：0.06-0.1%, Ba：0.3-
0.5%, rare earth element：0.01-0.02%, Hf：0.1-0.2%, Fe ＜ 0.025%, balance of Al and inevitably miscellaneous
Prime element.
The main alloy element of alloy matrix aluminum of the present invention is magnesium and silicon, can form Mg2Si phases, Mg2Si phases are solid-solution in aluminium
In, it is the hardening constituent of aluminium alloy.In addition, the present invention uses pressure infiltration complex technique, silicon addition and Mg can be destroyed
Pellumina, shortens the incubation period of infiltration process.And micro manganese is used for neutralizing badly acting on for iron with chromium, micro copper and zinc are used
In the intensity for improving alloy matrix aluminum, micro zirconium and titanium are used for crystal grain thinning with control recrystallized structure.Enable aluminum alloy to have
The performances such as preferable intensity, corrosion resistance.
In addition, the present invention also added micro Sc, the micro Sc and Zr in alloy can be formed in process of setting just
Raw Al3(Sc, Zr), can notable refining alloy as-cast grain, play a part of to aid in crystal grain thinning with control recrystallized structure.And
The secondary Al formed during homogenization3(Sc, Zr) particle can pinning dislocation and sub boundary strongly, effectively suppress Deformation structure again
Crystallization, significantly improves the mechanical property of alloy.
The trace alloying element Hf that the present invention also adds, can improve elevated temperature strength and the creep rupture life of alloy.
In addition, rare earth element is the elemental composition that often adds in present alloy modification, can be miscellaneous with crystal grain thinning, purification
Matter, reaches and puies forward heavy alloyed hardness, intensity and other effects.And Ba elements are generally considered to be impurity element, aluminium alloy can be reduced
Purity, affects the combination property of aluminium alloy, so generally, does not contain or the impurity elements of Ba containing very small amount in aluminium alloy.
But, present invention research shows, Ba constituent contents are improved, and compatibility Sb elements and micro rare earth element simultaneously, can play
Good enhancing effect, while, it is possible to decrease the consumption of rare earth element.
In a kind of above-mentioned cloth pressing foot, the hard abrasive particles are the oxide of aluminium, in the nitride of aluminium at least
One kind, aperture of the particle diameter less than foam carbon skeleton.Add hard abrasive particles in foam carbon skeleton reinforced aluminum matrix composites,
By simple physical blending, the wearability and other mechanical properties of composite can be improved.
In a kind of above-mentioned cloth pressing foot, the pressure limit of the pressure infiltration is 10-15MPa, and temperature is 660-700
℃.The present invention is combined with alloy matrix aluminum closely by composite foamy carbon obtained in pressure infiltration, and border is clearly demarcated, on boundary
Without microdefects such as holes at face, effect is more excellent.
In a kind of above-mentioned cloth pressing foot, the foam carbon skeleton reinforced aluminum matrix composites through Homogenization Treatments,
The temperature for homogenizing process is 500-550 DEG C, and the time is 10-12h.The present invention is passed through after pressure infiltration is obtained composite
Homogenization Treatments, the quantity of the phase in alloy matrix aluminum, distribution and size it is further preferred that, alloy rigidity is also of a relatively high.
In a kind of above-mentioned cloth pressing foot, the foam carbon skeleton reinforced aluminum matrix composites are gone back after Homogenization Treatments
Solution treatment is carried out, the temperature of solution treatment is 630-640 DEG C, and the time is 1-2h.
In a kind of above-mentioned cloth pressing foot, the foam carbon skeleton reinforced aluminum matrix composites are also entered after solution treatment
Row Ageing Treatment, the temperature of Ageing Treatment is 170-190 DEG C, and the time is 8-10h.
Compared with prior art, the present invention has following advantage：
1. cloth pressing foot of the present invention is made using foam carbon skeleton reinforced aluminum matrix composites, with higher mechanical strength,
Toughness, wearability, combination property are more preferable.
2. the density of foam carbon skeleton of the present invention is little, intensity is high, and the mechanical property of alloy matrix aluminum is good, and foam carbon skeleton
There is good Interface adhesive strength with alloy matrix aluminum, foam carbon skeleton is obtained by pressure infiltration technology and is combined tightly with matrix
Close, border is clearly demarcated, composite of the interface without microdefects such as holes.
Specific embodiment
The specific embodiment of the present invention is the following is, technical scheme is further described, but the present invention is simultaneously
It is not limited to these embodiments.
Embodiment 1：
The present embodiment cloth pressing foot is melted by pressure by the alloy matrix aluminum of the foam carbon skeleton that volume ratio is 30% and 70%
Ooze and be composited.Concrete preparation process is as follows：
The foam carbon skeleton that aperture is 100 μm, percent opening is 90% is made in compress feet.
Melting aluminium liquid, the constituent and its mass percent of aluminium liquid are：Si：0.4%, Mg：0.8%, Mn：0.13%,
Cr：0.08%, Cu：0.11%, Zn：0.18%, Zr：0.12%, Ti：0.11%, Sc：0.03%, Sb：0.06%, Ba：
0.3%, rare earth element ce：0.01%, Hf：0.1%, Fe：0.015%, balance of Al and inevitable impurity element.
Using pressure infiltration technology, at a temperature of 10MPa and 660 DEG C, by the above-mentioned foam carbon skeleton in compress feet with
Aluminium liquid pressure oozes into cloth pressing foot blank.Blank Homogenization Treatments 12h at 500 DEG C respectively, solution treatment 2h at 630 DEG C, 170
Ageing Treatment 10h at DEG C, is obtained final cloth pressing foot.
Embodiment 2：
The present embodiment cloth pressing foot is melted by pressure by the alloy matrix aluminum of the foam carbon skeleton that volume ratio is 35% and 65%
Ooze and be composited.Concrete preparation process is as follows：
The foam carbon skeleton that aperture is 150 μm, percent opening is 88% is made in compress feet.
Melting aluminium liquid, the constituent and its mass percent of aluminium liquid are：Si：0.5%, Mg：0.9%, Mn：0.14%,
Cr：0.10%, Cu：0.12%, Zn：0.19%, Zr：0.13%, Ti：0.12%, Sc：0.037%, Sb：0.07%, Ba：
0.35%, rare earth element ce：0.014%, Hf：0.13%, Fe：0.02%, balance of Al and inevitable impurity element.
Using pressure infiltration technology, at a temperature of 10MPa and 680 DEG C, by the above-mentioned foam carbon skeleton in compress feet with
Aluminium liquid pressure oozes into cloth pressing foot blank.Blank Homogenization Treatments 12h at 510 DEG C, solution treatment 1.5h at 635 DEG C respectively,
Ageing Treatment 10h at 175 DEG C, is obtained final cloth pressing foot.
Embodiment 3：
The present embodiment cloth pressing foot is melted by pressure by the alloy matrix aluminum of the foam carbon skeleton that volume ratio is 40% and 60%
Ooze and be composited.Concrete preparation process is as follows：
The foam carbon skeleton that aperture is 200 μm, percent opening is 85% is made in compress feet.
Melting aluminium liquid, the constituent and its mass percent of aluminium liquid are：Si：0.6%, Mg：1.0%, Mn：0.15%,
Cr：0.15%, Cu：0.14%, Zn：0.20%, Zr：0.13%, Ti：0.13%, Sc：0.04%, Sb：0.08%, Ba：
0.4%, rare-earth elements La：0.016%, Hf：0.15%, Fe：0.02%, balance of Al and inevitable impurity element.
Using pressure infiltration technology, at a temperature of 12MPa and 670 DEG C, by the above-mentioned foam carbon skeleton in compress feet with
Aluminium liquid pressure oozes into cloth pressing foot blank.Blank Homogenization Treatments 11h at 520 DEG C, solution treatment 1.5h at 635 DEG C respectively,
Ageing Treatment 9h at 180 DEG C, is obtained final cloth pressing foot.
Embodiment 4：
The present embodiment cloth pressing foot is melted by pressure by the alloy matrix aluminum of the foam carbon skeleton that volume ratio is 45% and 55%
Ooze and be composited.Concrete preparation process is as follows：
The foam carbon skeleton that aperture is 250 μm, percent opening is 82% is made in compress feet.
Melting aluminium liquid, the constituent and its mass percent of aluminium liquid are：Si：0.7%, Mg：1.1%, Mn：0.16%,
Cr：0.20%, Cu：0.15%, Zn：0.21%, Zr：0.14%, Ti：0.14%, Sc：0.046%, Sb：0.09%, Ba：
0.45%, rare-earth elements La：0.018%, Hf：0.18%, Fe：0.01%, balance of Al and inevitable impurity element.
Using pressure infiltration technology, at a temperature of 13MPa and 690 DEG C, by the above-mentioned foam carbon skeleton in compress feet with
Aluminium liquid pressure oozes into cloth pressing foot blank.Blank Homogenization Treatments 11h at 540 DEG C, solution treatment 1.5h at 640 DEG C respectively,
Ageing Treatment 8h at 185 DEG C, is obtained final cloth pressing foot.
Embodiment 5：
The present embodiment cloth pressing foot is melted by pressure by the alloy matrix aluminum of the foam carbon skeleton that volume ratio is 50% and 50%
Ooze and be composited.Concrete preparation process is as follows：
The foam carbon skeleton that aperture is 300 μm, percent opening is 80% is made in compress feet.
Melting aluminium liquid, the constituent and its mass percent of aluminium liquid are：Si：0.8%, Mg：1.2%, Mn：0.17%,
Cr：0.22%, Cu：0.16%, Zn：0.22%, Zr：0.15%, Ti：0.15%, Sc：0.05%, Sb：0.1%, Ba：
0.5%, rare earth element ce：0.02%, Hf：0.2%, Fe：0.02%, balance of Al and inevitable impurity element.
Using pressure infiltration technology, at a temperature of 15MPa and 700 DEG C, by the above-mentioned foam carbon skeleton in compress feet with
Aluminium liquid pressure oozes into cloth pressing foot blank.Blank Homogenization Treatments 10h at 550 DEG C respectively, solution treatment 1h at 640 DEG C, 190
Ageing Treatment 8h at DEG C, is obtained final cloth pressing foot.
Embodiment 6：
The present embodiment cloth pressing foot by the foam carbon skeleton, 60% alloy matrix aluminum that volume ratio is 30% and 10% superhard
Abrasion resistant particles are composited by pressure infiltration.Hard abrasive particles are alundum (Al2O3), hole of the particle diameter less than foam carbon skeleton
Footpath.Foam carbon skeleton, alloy matrix aluminum, concrete preparation process are same as Example 1.
Embodiment 7：
The present embodiment cloth pressing foot by the foam carbon skeleton, 65% alloy matrix aluminum that volume ratio is 30% and 5% superhard
Abrasion resistant particles are composited by pressure infiltration.Hard abrasive particles are alundum (Al2O3), hole of the particle diameter less than foam carbon skeleton
Footpath.Foam carbon skeleton, alloy matrix aluminum, concrete preparation process are same as Example 2.
Embodiment 8：
The present embodiment cloth pressing foot by the foam carbon skeleton, 50% alloy matrix aluminum that volume ratio is 40% and 10% superhard
Abrasion resistant particles are composited by pressure infiltration.Hard abrasive particles are alundum (Al2O3), hole of the particle diameter less than foam carbon skeleton
Footpath.Foam carbon skeleton, alloy matrix aluminum, concrete preparation process are same as Example 3.
Embodiment 9：
The present embodiment cloth pressing foot by the foam carbon skeleton, 45% alloy matrix aluminum that volume ratio is 40% and 15% superhard
Abrasion resistant particles are composited by pressure infiltration.Hard abrasive particles are aluminium nitride, aperture of the particle diameter less than foam carbon skeleton.Bubble
Foam carbon skeleton, alloy matrix aluminum, concrete preparation process are same as Example 4.
Embodiment 10：
The present embodiment cloth pressing foot by the foam carbon skeleton, 35% alloy matrix aluminum that volume ratio is 50% and 15% superhard
Abrasion resistant particles are composited by pressure infiltration.It is 1 with aluminium nitride mass ratio that hard abrasive particles are alundum (Al2O3)：1 mixed
Compound, aperture of the particle diameter less than foam carbon skeleton.Foam carbon skeleton, alloy matrix aluminum, concrete preparation process and 5 phase of embodiment
With.
Embodiment 11-20：
Embodiment 11-20 is differed only in embodiment 1-10, and the foamy carbon skeleton surface of embodiment 11-20 is by changing
Learning gas-phase permeation has SiC strengthening layers.
Cloth pressing foot obtained in above-described embodiment 1-20 is carried out performance test, test result is as shown in table 1.Wherein, wear and tear
The condition of rate is：Under room temperature, 6N load, 1m/s speed, test specimen slides 2500m.
Table 1：
As known from Table 1, after adding hard abrasive particles in embodiment 6-10, the performance such as intensity, elongation percentage slightly improves, base
This maintenance is stable, but, the very fast decline of wear rate, the wearability of cloth pressing foot are lifted substantially.In embodiment 11-20, foamy carbon bone
After frame surface forms strengthening layer, the performance such as intensity of cloth pressing foot increases.
Comparative example 1：
Comparative example 1 is differed only in embodiment 3, and the cloth pressing foot of comparative example 1 is directly prepared into by alloy matrix aluminum, is not steeped
Foam carbon strengthens skeleton.After testing, the ultimate tensile strength of the cloth pressing foot of comparative example 1 is 137MPa, and ultimate bending strength is
55MPa, wear rate are 6.94%, and elongation percentage is 20%.It follows that alloy matrix aluminum strengthens skeleton using foamy carbon strengthening
Afterwards, performance boost is obvious.
Comparative example 2：
Comparative example 2 is differed only in embodiment 3, does not contain Sc elements in the aluminum substrate of comparative example 2.
Comparative example 3：
Comparative example 3 is differed only in embodiment 3, does not contain Zr elements in the aluminum substrate of comparative example 3.
After testing, the ultimate tensile strength of comparative example 2 and comparative example 3 is respectively 177MPa, 169MPa, ultimate bending strength
Respectively 58MPa, 61MPa.It follows that Sc and Zr compatibilities can play a part of reinforced alloys.
Comparative example 4：
Comparative example 4 is differed only in embodiment 3, does not contain Ba and Sb elements in the aluminum substrate of comparative example 4.
Comparative example 5；
Comparative example 5 is differed only in comparative example 4, and the rare earth element in the aluminum substrate of comparative example 4 expands 20 times.
After testing, the ultimate tensile strength of comparative example 4 and comparative example 5 is respectively 183MPa, 221MPa, ultimate bending strength
Respectively 57MPa, 72MPa.It follows that Ba elements, Sb elements and rare earth element compatibility can play a part of reinforced alloys,
Reduce the usage amount of rare earth, protect resource.
Comparative example 6：
Comparative example 6 is differed only in embodiment 6, and the particle diameter of the hard abrasive particles of comparative example 6 is more than foamy carbon bone
The aperture of frame.After testing, the ultimate tensile strength of the cloth pressing foot of comparative example 6 is 209MPa, and ultimate bending strength is 68MPa, property
Can decrease.This is because, when hard abrasive particles particle diameter is more than ceramic skeleton aperture, partial particulate blocking aperture can be made,
Alloy matrix aluminum cannot be filled up completely with ceramic skeleton during pressure is oozed, and the compactness of composite is not enough, causes composite
Performance reduce.
In view of the present invention program embodiment is numerous, each embodiment experimental data is huge numerous, is not suitable for arranging one by one herein
Explanation is lifted, but the content of checking required for each embodiment and the final conclusion for obtaining are close to.So herein not to each reality
The checking content for applying example is illustrated one by one, only using embodiment 1-20 as the excellent part of representative explanation the present patent application.
Specific embodiment described herein is only to the spiritual explanation for example of the present invention.Technology neck belonging to of the invention
The technical staff in domain can be made various modifications or supplement or substituted using similar mode to described specific embodiment, but simultaneously
Do not deviate by the spirit of the present invention or surmount scope defined in appended claims.
Although having made a detailed description and being cited some specific embodiments to the present invention, skilled to this area
For technical staff, as long as it is obvious that can make various changes without departing from the spirit and scope of the present invention or revise.
Claims (9)
1. a kind of cloth pressing foot, it is characterised in that the cloth pressing foot is made up of foam carbon skeleton reinforced aluminum matrix composites, the bubble
Foam carbon skeleton reinforced aluminum matrix composites are mainly led to by the alloy matrix aluminum of foam carbon skeleton and surplus that volume ratio is 30-50%
Excess pressure infiltration is composited.
2. a kind of cloth pressing foot according to claim 1, it is characterised in that the foam carbon skeleton reinforced aluminum matrix composites
Aluminium alloy including the hard abrasive particles that volume ratio is 5-15% and the foam carbon skeleton, 35-65% that volume ratio is 30-50%
Matrix is composited by pressure infiltration.
3. a kind of cloth pressing foot according to claim 1 and 2, it is characterised in that the aperture of the foam carbon skeleton is 100-
300 μm, percent opening is 80-90%.
4. a kind of cloth pressing foot according to claim 1 and 2, it is characterised in that the alloy matrix aluminum is by following quality hundred
Divide to compare into and be grouped into：Si：0.4-0.8%, Mg：0.8-1.2%, Mn：0.13-0.17%, Cr：0.08-0.22%, Cu：0.11-
0.16%, Zn：0.18-0.22%, Zr：0.12-0.15%, Ti：0.11-0.15%, Sc：0.03-0.05%, Sb：0.06-
0.1%, Ba：0.3-0.5%, rare earth element：0.01-0.02%, Hf：0.1-0.2%, Fe ＜ 0.025%, balance of Al and
Inevitable impurity element.
5. a kind of cloth pressing foot according to claim 2, it is characterised in that the hard abrasive particles for aluminium oxide,
At least one in the nitride of aluminium, aperture of the particle diameter less than foam carbon skeleton.
6. a kind of cloth pressing foot according to claim 1 and 2, it is characterised in that the pressure limit of the pressure infiltration is 10-
15MPa, temperature are 660-700 DEG C.
7. a kind of cloth pressing foot according to claim 1 and 2, it is characterised in that the foam carbon skeleton strengthens aluminum-base composite
Through Homogenization Treatments, the temperature of Homogenization Treatments is 500-550 DEG C to material, and the time is 10-12h.
8. a kind of cloth pressing foot according to claim 7, it is characterised in that the foam carbon skeleton reinforced aluminum matrix composites
Solution treatment is also carried out after Homogenization Treatments, and the temperature of solution treatment is 630-640 DEG C, and the time is 1-2h.
9. a kind of cloth pressing foot according to claim 8, it is characterised in that the foam carbon skeleton reinforced aluminum matrix composites
Ageing Treatment is also carried out after solution treatment, and the temperature of Ageing Treatment is 170-190 DEG C, and the time is 8-10h.
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| CN201611063519.XA CN106498224A (en) | 2016-11-28 | 2016-11-28 | A kind of cloth pressing foot |
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| CN201611063519.XA CN106498224A (en) | 2016-11-28 | 2016-11-28 | A kind of cloth pressing foot |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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