CN100503089C - Composition for high specific weight eccentric wheel for vibrating motor and its use - Google Patents
Composition for high specific weight eccentric wheel for vibrating motor and its use Download PDFInfo
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- CN100503089C CN100503089C CNB2006100296576A CN200610029657A CN100503089C CN 100503089 C CN100503089 C CN 100503089C CN B2006100296576 A CNB2006100296576 A CN B2006100296576A CN 200610029657 A CN200610029657 A CN 200610029657A CN 100503089 C CN100503089 C CN 100503089C
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Abstract
The present invention is one kind of metal mixture powder comprising W 85-97 wt%, Ni 1.9-9.5 wt%, Cu 1.0-4.5 wt% and Fe 0.1-1 wt%, and the process of making great specific weight eccentric wheel for vibrating motor with the metal mixture powder and through mixing the metal mixture powder with adhesive at high temperature and subsequent injecting or die forming.
Description
Technical field
The present invention relates to a kind ofly mix through high temperature with a kind of special binding agent with 85%-97%W+9.5%-1.9%Ni+4.5%-1.0%Cu+1%-0.1%Fe metal mixed powder, then by injection or die forming vibrating motor with the eccentric processing method of high specific gravity.
Background technology
High specific gravity alloy material is that a class is matrix (W content 85-99%) with tungsten, and is added with the alloy that elements such as Ni, Cu, Co, Mo, Cr are formed.Be divided into main series such as W-Ni-Fe, W-Ni-Cu, W-Ni-Co, W-Ni-Cr, W-Ni-Mo by alloy composition characteristic and purposes, its density is up to 16.5-19.0g/cm
3, and be called high-density alloy by common people, and it also has the characteristic of a series of excellences, and than great: general proportion is 16.5-18.75g/cm
3, the intensity height: tensile strength is 700-1000Mpa, it is strong to absorb the ray ability: and the plumbous high 30-40% of its energy force rate, thermal conductivity factor is big; Be 5 times of mould steel; Thermal coefficient of expansion is little: have only the 1/2-1/3 of iron or steel, but good electric conductivity; Have good solderability and processability.In view of high-density alloy has the function of above-mentioned excellence, it is used in space flight, aviation, military affairs, oil drilling, industry such as electrical instrumentation, medical science widely.
And be used for high specific gravity eccentric mainly is tungsten-nickel-copper alloy or tungsten nickel iron alloy.The sintering temperature of tungsten-nickel-copper alloy low (1300-1450 ℃), energy consumption is low, and its density can reach the general desired density of high specific gravity eccentric wheel, promptly greater than 18.0g/cm
3, but because of the intensity and the ductility of the tungsten-nickel-copper alloy that reaches above-mentioned density poor, and vibrating motor with the high specific gravity eccentric wheel be by riveted joint be connected motor spool on, so the ductility of this alloy is poor, product ftractures easily.
In addition, though its intensity of tungsten nickel iron alloy and ductility are good, require the temperature height (1500-1650 ℃) of sintering, the requirement height of energy consumption and equipment;
And the present invention adopts the prescription that adds Fe on the basis of W-Ni-Cu by a certain percentage, not only can reduce sintering temperature, and increase the eccentric physical-mechanical properties of high specific gravity, and product is not easy to crack.
In addition, general high specific gravity eccentric wheel is shaped with mold pressing or ejection forming method.Above-mentioned metal alloy composition provided by the present invention not only can be used for mold pressing but also can be used for injection moulding.
Adopt above-mentioned metal-powder compositions of the present invention, be shaped with mold pressing and/or ejection forming method, prepared shaping base Density Distribution is even, and is indeformable behind the sintering, the dimensional accuracy height.
Summary of the invention
Purpose of the present invention provides a kind of vibrating motor with the eccentric prescription of high specific gravity and the compound that adopts this formula material and a kind of binding agent processing method through injection moulding and die forming.
In a first aspect of the present invention, a kind of metal-powder compositions is provided, it is characterized in that described composition contains following component:
(a)97-85wt％W；
(b)9.5-1.9wt％Ni；
(c)4.5-1.0wt％Cu；
(d)1-0.1wt％Fe；
Wherein, described percentage by weight is by the total weight of component (a) to (d), and the particle mean size of described metal dust is the 1-50 micron.
The present invention also provides a kind of composition, it is characterized in that, described composition contains:
(a)97-85wt％W；
(b)9.5-1.9wt％Ni；
(c)4.5-1.0wt％Cu；
(d)1-0.1wt％Fe；
Wherein, the percentage by weight of component (a) to (d) is the total weight by component (a) to (d), and the particle mean size of described metal dust is the 1-50 micron;
(e) binding agent, wherein said binding agent is: polyethylene, paraffin, EVA, stearic mixture, and the content of binding agent is the 2-6wt% of component (a) to the gross weight of (d).
In addition, the invention still further relates to a kind of preparation vibrating motor, it is characterized in that, comprise the steps: with the eccentric method of high specific gravity
(i) according to the vibrating motor eccentric shape of high specific gravity, the described composition of claim 3 is carried out injection moulding or die forming, thus shaping vibrating motor high specific gravity eccentric wheel blank;
(ii) shaped blanks is carried out degreasing, form the degreasing base;
(iii) the degreasing base is carried out sintering, form vibrating motor high specific gravity eccentric wheel.
In addition, the feature of preceding method is that also the condition of the injection moulding of described (i) comprising: in injection machine, with 100-160 ℃, injection pressure is 30-80Mpa, and the mould temperature is under the 25-50 ℃ of condition, is processed into blank.
In addition, the feature of preceding method is that also the condition of described (i) die forming comprises: with described composition with pressing pressure 1-3t/cm
2Die forming is processed into blank.
In addition, described step (ii) comprises: the blank of processing is heated to 35-50 ℃ and be incubated 5-8 hour, the paraffin in the dissolving blank; Then this blank is put into debinding furnace, under the protection of decomposed ammonia, carry out hot degreasing and pre-burning with 100-300 ℃ of/hour temperature that is heated to 700-900 ℃, form the degreasing base after the pre-burning.
Moreover, described step (iii) comprises: the degreasing base after the pre-burning is placed in the pottery, in the molybdenum filament sintering furnace, hydrogen or decomposed ammonia at dew point 0 degree-30 degree, temperature 1300-1450 ℃ sintering 30-120 minute, be as cold as room temperature with the following speed of 30 ℃/min then, form vibrating motor high specific gravity eccentric wheel.
The invention still further relates to the purposes of foregoing, it is characterized in that, be used to prepare vibrating motor high specific gravity eccentric wheel.
The specific embodiment
The inventor finds that through extensive and deep research the metallic particles of tungsten (W), nickel (Ni), copper (Cu) and iron (Fe) is pressed special ratios to be mixed, and can form a kind of vibrating motor eccentric composition of high specific gravity that is used to prepare.Eccentric wheel with the said composition preparation has excellent performance, density height, good toughness.In another preference, described composition is mixed with binding agent, can form a kind of injection moulding that promptly can be used for, can be used for the composition of die forming again.Finished the present invention on this basis.
Various metal ingredients as metal-powder compositions of the present invention, satisfy following condition:
To being used for tungsten metal of the present invention (W), make it meet FW-1 requirement among the GB/T 3458-1982, powder mean particle sizes is the 2-3 micron.
For being used for nickel of the present invention (Ni), make it meet FTN-1 requirement among the GB/T 7160-1987, powder mean particle sizes is the 2.0-3.2 micron.
For being used for copper of the present invention (Cu), make it meet FTD3 requirement among the GB/T 5246-1985, powder size requires 400 orders.
To being used for iron of the present invention (Fe), make FTF-4 requirement among its accord with Q/21430069-0.1-1999, powder mean particle sizes is the 2.0-3.2 micron.
Metal-powder compositions of the present invention can be poured in the V-type mixing equipment after above-mentioned four kinds of powder are weighed up in following ratio, mixes just can obtain even compound in 30-120 minute:
(a)97-85wt％W；
(b)9.5-1.9wt％Ni；
(c)4.5-1.0wt％Cu；
(d)1-0.1wt％Fe；
Wherein, described percentage by weight is by the total weight of component (a) to (d).
The particle mean size of metal-powder compositions of the present invention is 1-50 microns, is preferably 2-10 microns.
Binding agent is polyethylene, paraffin, EVA, stearic mixture, and part by weight is 0.1-10:50-80:10-30:0.1-5.This mixture can adopt common hybrid mode to mix; In addition, also can when making composition, polyethylene, paraffin, EVA, stearic acid be mixed according to 4 kinds of metal ingredients of corresponding proportion and other.
The consumption of this binding agent is the 2-6wt% of gross weight of 4 components of metal-powder compositions, and preferable content is 3.7-3.8wt%.The characteristic that how much depends on metal dust of binding agent consumption has under the prerequisite of good flowability at metal dust and binder mixtures, and the content of binding agent is few as much as possible.But if binder content is less than 2wt%, mixture is mobile poor, can not be shaped smoothly; If binding agent is too many, when surpassing 6wt%, the degreasing of subsequent handling and sintering can be out of shape.The particle size range of described composition grain (metal+binding agent the common particle that constitutes) is 40-200 orders.
The metal dust that V is mixed is poured in the SHR-50 high-speed mixing equipment with corresponding binding agent and was mixed under 135-165 ℃ temperature 30-60 minute, is cooled to room temperature then, the broken composition grain that can obtain requiring in the SWP-200 disintegrating machine.
The preparation vibrating motor eccentric processing method of high specific gravity.This processing method comprises the steps:
(i) according to the vibrating motor eccentric shape of high specific gravity, above-mentioned metal-powder compositions is carried out injection moulding or die forming, thereby vibrating motor becomes blank with the high specific gravity eccentric wheel;
(ii) shaped blanks is carried out degreasing, form the degreasing base;
(iii) the degreasing base is carried out sintering, form vibrating motor high specific gravity eccentric wheel.
Be not particularly limited for eccentric shape, be the general shape of those skilled in the art's approval.
In addition, for the injection moulding in the above-mentioned processing method, process conditions are in injection machine, are 100-160 ℃ with the forming temperature, and injection pressure is 30-80Mpa, and the mould temperature is under the 25-50 ℃ of condition, is processed into blank.The qualification of process conditions is by the decision of the characteristic of the composition of metal dust among the present invention and binding agent.If forming temperature is below 100 ℃, mobile difference is difficult for being shaped; If forming temperature is more than 160 ℃, binding agent easily separates and decomposes with metal dust, and product can not be shaped or shaping density, intensity are low, can not realize forming effect of the present invention; For injection pressure,, be difficult for being shaped if less than 30Mpa; If be higher than 80Mpa, powder easily separates with binding agent, and product can not be shaped or shaping density, intensity are low, can not realize forming requirements.
For the die forming in the above-mentioned processing method, the condition of this shaping comprises: with described composition with pressing pressure 1-3t/cm
2Die forming is processed into blank.Pressing pressure is also relevant with the characteristic of the mixture of metal dust and binding agent.If pressing pressure is low, product can not be shaped or shaping density, intensity are low; If pressing pressure is too high, though product density, intensity also can correspondingly increase at certain phase, arrived to a certain degree after, product density, intensity no longer increase with pressure and raise, equipment, mould damage are big on the contrary.
Adopt the formed composition of metal dust of the present invention and binding agent, not only can be used for die forming, also can be used for injection moulding.Can adopt any technology in two kinds of forming technologies according to features such as eccentric shape, output, except that forming machine, on the basis that does not need extra production equipment, just can obtain Density Distribution evenly, good product consistency, the eccentric wheel that precision is high; Adopt form the same of mold pressing of the present invention to have step-like eccentric wheel in addition with injection moulding.
Major advantage of the present invention is:
(a) composition of the present invention both can be used for injection moulding, also can be used for die forming, thereby had realized the general of injection moulding and mold pressing raw material.
(b) the vibrating motor high specific gravity eccentric hammer that adopts the present invention to produce, the product even tissue, performance is good, the dimensional accuracy height.
Below in conjunction with specific embodiment, further set forth the present invention.Should be understood that these embodiment only to be used to the present invention is described and be not used in and limit the scope of the invention.The experimental technique of unreceipted actual conditions in the following example, usually according to normal condition, or the condition of advising according to manufacturer.
Unless otherwise indicated, otherwise umber and percentage are parts by weight and percentage by weight.
Embodiment
Preparation example 1: satisfactory metal dust is put into the V-type mixing apparatus in the 95.1wt%W-3wt%Ni-1.5wt%Cu-0.4wt%Fe ratio mixed 60 minutes, obtain composition 1.
With composition 1 binding agent with 3.78wt%, in the SHR-50 high-speed mixer, mixed 30 minutes under the 135-165 ℃ of temperature, behind the cool to room temperature in the SWP-200 disintegrating machine the broken composition 5 that forms.
With composition 1 binding agent with 2wt%, in the SHR-50 high-speed mixer, mixed 30 minutes under the 135-165 ℃ of temperature, behind the cool to room temperature in the SWP-200 disintegrating machine the broken composition 6 that forms.
With composition 1 binding agent with 6wt%, in the SHR-50 high-speed mixer, mixed 30 minutes under the 135-165 ℃ of temperature, behind the cool to room temperature in the SWP-200 disintegrating machine the broken composition 7 that forms.
With composition 1 binding agent with 1.5wt%, in the SHR-50 high-speed mixer, mixed 30 minutes under the 135-165 ℃ of temperature, behind the cool to room temperature in the SWP-200 disintegrating machine the broken composition 8 that forms.
With composition 1 binding agent with 8wt%, in the SHR-50 high-speed mixer, mixed 30 minutes under the 135-165 ℃ of temperature, behind the cool to room temperature in the SWP-200 disintegrating machine the broken composition 9 that forms.
In injector and degreasing equipment, respectively composition 5-9 is carried out flowability and conformality test, test result such as table 1.
Table 1
| The composition project | Composition 5 | Composition 6 | Composition 7 | Composition 8 | Composition 9 |
| Mobile | Well | Generally | Well | Difference | Well |
| Conformality | Well | Well | Generally | Well | Difference |
All good to composition 5-9 evaluation requirement flowability and two indexs of conformality, take all factors into consideration composition 5-7 good combination property.
With composition 5 in injector 140 ℃, be shaped under the injection pressure of 50MPa, forming radius is the eccentric shaping base of 2.0mm.Solution-off 8 hours in 45 ℃ alcohol is carried out hot degreasing under 800 ℃ the temperature again in ammonia decomposes then, the product after the degreasing in the molybdenum filament sintering furnace in decomposed ammonia 1400 ℃ of sintering, obtain vibrating motor with high specific gravity eccentric wheel 1.
Preparation example 2: satisfactory metal dust is put into the V-type mixing apparatus in the 97wt%W-1.9wt%Ni-1.0wt%Cu-0.1wt%Fe ratio mixed 60 minutes, obtain composition 2.
The binding agent of composition 2 and 3.78wt% mixed in the SHR-50 high-speed mixer 30 minutes again, and compound cooling, broken back in injector 140 ℃ are shaped under the injection pressure of 50MPa, and forming radius is the eccentric shaping base of 2.0mm.Solution-off 8 hours in 45 ℃ alcohol is carried out hot degreasing under 800 ℃ the temperature again in ammonia decomposes then, the product after the degreasing in the molybdenum filament sintering furnace in decomposed ammonia 1400 ℃ of sintering, obtain vibrating motor with high specific gravity eccentric wheel 2.
Preparation example 3: satisfactory metal dust is put into the V-type mixing apparatus in the 85wt%W-9.5wt%Ni-4.5wt%Cu-1.0wt%Fe ratio mixed 60 minutes, obtain composition 3.
The binding agent of composition 3 and 3.78wt% mixed in the SHR-50 high-speed mixer 30 minutes again, and compound cooling, broken back in injector 140 ℃ are shaped under the injection pressure of 50MPa, and forming radius is the eccentric shaping base of 2.0mm.Solution-off 8 hours in 45 ℃ alcohol is carried out hot degreasing under 800 ℃ the temperature again in ammonia decomposes then, the product after the degreasing in the molybdenum filament sintering furnace in decomposed ammonia 1400 ℃ of sintering, obtain vibrating motor with high specific gravity eccentric wheel 3.
Comparative example 1: satisfactory metal dust is put into the V-type mixing apparatus in the 95.5wt%W-3wt%Ni-1.5wt%Cu ratio mixed 60 minutes, obtain composition 4.
The binding agent of composition 4 and 3.78wt% mixed in the SHR-50 high-speed mixer 30 minutes again, and compound cooling, broken back in injector 140 ℃ are shaped under the injection pressure of 50MPa, and forming radius is the eccentric shaping base of 2.0mm.Solution-off 8 hours in 45 ℃ alcohol is carried out hot degreasing under 800 ℃ the temperature again in ammonia decomposes then, the product after the degreasing in the molybdenum filament sintering furnace in decomposed ammonia 1400 ℃ of sintering, obtain vibrating motor with high specific gravity eccentric wheel 4.
Method of testing: the vibrating motor that makes in above-mentioned preparation example and the comparative example is riveted the product test of whether ftractureing, the result such as the table 2 of test with the high specific gravity eccentric wheel on special-purpose riveting machine.
Table 2
Intensity, the toughness of the formed product of 97-85wt%W+9.5-1.9wt%Ni+4.5-1.0wt%Cu+1-0.1wt%Fe composition of the present invention are better, and the product riveted joint is not ftractureed.
The performance of the formed product of 95.1wt%W-3wt%Ni-1.5wt%Cu-0.4wt%Fe composition of the present invention obviously is better than the formed product of 95.5wt%W-3wt%Ni-1.5wt%Cu composition.
Make the vibrating motor eccentric method of high specific gravity:
Make example 1
With composition 5 in injector 140 ℃, be shaped under the injection pressure of 50MPa, forming radius is the eccentric shaping base of 3.0mm.Solution-off 8 hours in 45 ℃ alcohol is carried out hot degreasing under 800 ℃ the temperature again in ammonia decomposes then, the product after the degreasing in the molybdenum filament sintering furnace in decomposed ammonia 1400 ℃ of sintering, sintered products density 18.15g/cm
3, product size, functional satisfies the zero-fault requirement fully.
Make example 2
Composition 5 is crossed 40-200 orders, on press with 1-3t/cm
2Pressure, press forming in the mould of single bottom punch forms total height 2.4mm, the motor of the high 1.2mm of step high specific gravity eccentric wheel wherein, the even compact body that this shaping base is metal dust and adhesive composition, Density Distribution is even.Solution-off 8 hours in 45 ℃ alcohol is carried out hot degreasing under 800 ℃ the temperature again in ammonia decomposes then, the product after the degreasing in the molybdenum filament sintering furnace in decomposed ammonia 1400 ℃ of sintering, sintered products density 18.15g/cm
3, measuring height direction products radial consistent size behind the sintering, product size, functional satisfies the zero-fault requirement fully.
Utilize prior art, adopt general molding compound, general mould pressing method to be difficult to shaping total height 2.4mm, the wherein motor of the high 1.2mm of step high specific gravity eccentric wheel.
All quote in this application as a reference at all documents that the present invention mentions, just quoted as a reference separately as each piece document.Should be understood that in addition those skilled in the art can make various changes or modifications the present invention after having read above-mentioned instruction content of the present invention, these equivalent form of values fall within the application's appended claims institute restricted portion equally.
Claims (7)
1. the composition that vibrating motor is used with the high specific gravity eccentric wheel is characterized in that, described composition contains metal-powder compositions and binding agent,
Described metal-powder compositions contains
(a)97-85wt％W；
(b)9.5-1.9wt％Ni；
(c)4.5-1.0wt％Cu；
(d)1-0.1wt％Fe；
Wherein, the percentage by weight of component (a) to (d) is the total weight by component (a) to (d), and the particle mean size of described metal dust is the 1-50 micron;
Described binding agent is: polyethylene, paraffin, EVA, stearic mixture, its content are the 2-6wt% of component (a) to the gross weight of (d); Polyethylene, paraffin, EVA and stearic mixed proportion are represented with part by weight, are 0.1-10:50-80:10-30:0.1-5.
2. composition as claimed in claim 1 is characterized in that, the particle size range of described composition grain is 40-200 orders.
3. one kind prepares vibrating motor with the eccentric method of high specific gravity, it is characterized in that, comprises the steps:
(i) according to the vibrating motor eccentric shape of high specific gravity, the described composition of claim 1 is carried out injection moulding or die forming, thus shaping vibrating motor high specific gravity eccentric wheel blank;
(ii) shaped blanks is carried out degreasing, form the degreasing base;
(iii) the degreasing base is carried out sintering, form vibrating motor high specific gravity eccentric wheel.
4. method as claimed in claim 3 is characterized in that, the condition of described injection moulding comprises: in injection machine, at 100-160 ℃, injection pressure is 30-80Mpa, and the mould temperature is under 25-50 ℃ the condition, to be processed into blank.
5. method as claimed in claim 3 is characterized in that, the average grain diameter of described composition is 40-200 orders.
6. method as claimed in claim 5 is characterized in that, the condition of described die forming comprises: with described composition with pressing pressure 1-3t/cm
2Die forming is processed into blank.
7. the purposes of claim 1 metal-powder compositions is characterized in that, is used to prepare vibrating motor high specific gravity eccentric wheel.
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| CNB2006100296576A CN100503089C (en) | 2006-08-02 | 2006-08-02 | Composition for high specific weight eccentric wheel for vibrating motor and its use |
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| CNB2006100296576A CN100503089C (en) | 2006-08-02 | 2006-08-02 | Composition for high specific weight eccentric wheel for vibrating motor and its use |
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| CN100503089C true CN100503089C (en) | 2009-06-24 |
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Non-Patent Citations (2)
| Title |
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| 钨基合金材料的研究现状及其发展趋势. 马运柱，黄伯云，刘文胜.粉末冶金工业，第15卷第5期. 2005 |
| 钨基合金材料的研究现状及其发展趋势. 马运柱，黄伯云，刘文胜.粉末冶金工业，第15卷第5期. 2005 * |
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