CN109536785B - Ultra-silent roller hinge link slider - Google Patents
Ultra-silent roller hinge link slider Download PDFInfo
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- CN109536785B CN109536785B CN201811456382.3A CN201811456382A CN109536785B CN 109536785 B CN109536785 B CN 109536785B CN 201811456382 A CN201811456382 A CN 201811456382A CN 109536785 B CN109536785 B CN 109536785B
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- 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
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F9/00—Making metallic powder or suspensions thereof
- B22F9/02—Making metallic powder or suspensions thereof using physical processes
- B22F9/023—Hydrogen absorption
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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
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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
- C22C1/12—Making non-ferrous alloys by processing in a semi-solid state, e.g. holding the alloy in the solid-liquid phase
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- 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
- C22C32/0084—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 carbon or graphite as the main non-metallic constituent
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F3/00—Manufacture of workpieces or articles from metallic powder characterised by the manner of compacting or sintering; Apparatus specially adapted therefor ; Presses and furnaces
- B22F3/24—After-treatment of workpieces or articles
- B22F2003/248—Thermal after-treatment
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22F—WORKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MAKING METALLIC POWDER; APPARATUS OR DEVICES SPECIALLY ADAPTED FOR METALLIC POWDER
- B22F2998/00—Supplementary information concerning processes or compositions relating to powder metallurgy
- B22F2998/10—Processes characterised by the sequence of their steps
Abstract
The invention belongs to the technical field of metal processing, and particularly relates to an ultra-silent roller hinge link sliding block, which is made of aluminum alloy, wherein the aluminum alloy is composed of the following raw materials in percentage by mass: soaking the silver bamboo charcoal: 0.1-0.5%, Si: 0.1-0.2%, Mn: 0.2-0.4%, Ni: 0.06-0.12 percent of Al and impurities as the balance, and the slider is prepared by the processes of pretreatment, smelting, powder forming, finished product and the like, and the performance of the aluminum alloy is more suitable for improving the performance of the slider by the double improvement of the raw material formula and the process and the combination of the aging treatment process.
Description
Technical Field
The invention relates to an ultra-silent roller hinge link sliding block, belonging to the field of metal materials.
Background
The sliding block is a die assembly which can slide in a direction perpendicular to the die opening and closing direction or at a certain angle with the die opening and closing direction in the die opening action of the die, is convenient for certain products to use when the products cannot be normally demolded due to self structures, and has proper hardness and wear resistance and enough friction for bearing movement.
The sliding block is widely applied to the fields of spraying equipment, numerical control machines, machining centers, electronics, automation machinery, textile machinery, automobiles, medical appliances, printing machinery, packaging machinery, woodworking machinery, mold opening and the like.
Therefore, the performance of the sliding block greatly determines the transmission fluency of the linkage. The shape of the sliding block is determined during preparation, and the service life of the sliding block cannot be prolonged by optimizing the shape, so that the optimization of the material of the sliding block is focused on, and the effective service life of the sliding block is fundamentally prolonged. The aluminum alloy has better performance.
The aluminum alloy is an alloy system which is formed by adding a certain amount of additive elements and controlling the content of impurity elements on the basis of aluminum. The aluminum alloy has the advantages of high strength, high hardness and light weight, and is suitable for being used as a structural material. But the material composition and smelting process of the traditional aluminum alloy cannot better improve the alloy performance.
Aiming at the defects of low hardness, non-wear resistance and the like of the traditional alloy, the publication No. 106246804A discloses a slide block worm speed reducer, which improves the tensile strength, yield strength, corrosion resistance and temperature resistance of a product by changing the components and content of alloy steel. However, the alloy steel itself is heavy and the strength and corrosion resistance are not satisfactory for use in a complicated environment.
Disclosure of Invention
Aiming at the problems, the invention provides the sliding block which has higher strength, high hardness, corrosion resistance and a silencing effect and can adapt to complex environments.
In order to achieve the purpose, the invention adopts the following technical scheme:
the ultra-silent roller hinge is connected with the sliding block, the sliding block is made of aluminum alloy, and the aluminum alloy is composed of the following raw materials in percentage by mass: soaking the silver bamboo charcoal: 0.1-0.5%, Si: 0.1-0.2%, Mn: 0.2-0.4%, Ni: 0.06-0.12%, and the balance of Al and impurities.
Preferably, the silver-impregnated bamboo charcoal comprises superfine bamboo charcoal, nano silver particles and kaolin powder.
More preferably, the content of the superfine bamboo charcoal accounts for 70-78% of the silver-impregnated bamboo charcoal, the content of the nano-silver particles accounts for 12-22% of the silver-impregnated bamboo charcoal, and the content of the kaolin powder accounts for 5-10% of the silver-impregnated bamboo charcoal.
Further preferably, the distribution of the silver-impregnated bamboo charcoal nano-silver particles on the superfine bamboo charcoal is 20-80 nano-silver/mm2Bamboo charcoal.
According to the invention, the silver-impregnated bamboo charcoal is specially added into the aluminum alloy material, the bamboo charcoal can be used as one of carbon elements to assist and reinforce the aluminum alloy, and the bamboo charcoal has a series of advantages of good heat conduction (heat dissipation), high temperature resistance, corrosion resistance, self-lubrication, good chemical stability, low thermal expansion coefficient and the like, namely the aluminum alloy can obtain the advantages through the bamboo charcoal. However, the bamboo charcoal has low mechanical strength and a small amount of air holes in the bamboo charcoal, which can reduce the strength of the aluminum alloy, so on the basis of the bamboo charcoal, the invention adds an auxiliary additive, namely kaolin powder, the main material of the kaolin is oxides of aluminum, silicon and the like and a composition, the kaolin is the main raw material for preparing ceramics, and the auxiliary additive is added into the bamboo charcoal as an additive, so that the auxiliary additive not only can fill the internal air holes of the bamboo charcoal and improve the strength of the bamboo charcoal, but also can improve the wear resistance and oxidation resistance of the alloy, and has a reinforcing effect. Meanwhile, the bamboo charcoal is subjected to silver impregnation treatment, because the kaolin powder only partially fills the internal pores of the bamboo charcoal and the filling strength is weak, the pores are filled in a silver impregnation way, so that the compactness of the bamboo charcoal is increased to the maximum extent, and the contact degree of the silver-impregnated bamboo charcoal material and the alloy is improved.
Since the performance of the aluminum alloy is not determined by an additive material, the additive elements and the content of the aluminum alloy need to be changed according to the product, so as to ensure the performance of the final product. The slider needs to ensure the stability of the operation because of the unicity of the transmission mode. Therefore, Mn is adopted to replace Zr, the content of Mn is controlled to be 2 times of that of Zr, and the contents of Si and Ni elements are correspondingly increased. The sliding tearing of the aluminum alloy can be effectively avoided by reducing the complexity of the alloy phase and improving the proportion of the added elements in the alloy, and the toughness of the sliding block during sliding is improved.
Meanwhile, according to the working unicity of the sliding block, the specific composition of the bamboo charcoal soaked with silver is finely adjusted, the content of the bamboo charcoal is reduced, the content of nano-silver is increased, namely, the proportion of silver in the bamboo charcoal is increased, and the sliding smoothness of the aluminum alloy sliding block is improved (mainly, the combination degree of inorganic materials such as bamboo charcoal and the like and alloy is expanded by using the material affinity of silver, so that the uniformity of the alloy material is ensured).
The invention also provides another technical scheme while reasonably selecting the material proportion:
the preparation method of the ultra-silent roller hinge link slider comprises the following steps:
(1) pretreatment: weighing the raw materials, preheating superfine bamboo charcoal in vacuum, uniformly spreading kaolin powder on the surface of the bamboo charcoal, continuously heating and pressurizing to form composite bamboo charcoal, depositing nano silver on the surface of the composite bamboo charcoal, naturally cooling and crushing to obtain silver-impregnated bamboo charcoal particles;
(2) smelting: mixing and melting all materials except the silver-impregnated bamboo charcoal to form alloy liquid, naturally cooling to a semi-solid state, uniformly spreading silver-impregnated carbon particles on the surface of the semi-solid alloy, pressing, continuously heating until the alloy is in a liquid state, fully mixing, and cooling to obtain an alloy block;
(3) powder making and forming: carrying out cyclic hydrogenation-dehydrogenation treatment on the alloy block to form alloy powder, filling the powder into a die and pressing the powder into a semi-finished slider;
(4) and (3) finished product: and sintering the semi-finished product of the slide block, and performing heat treatment to obtain a finished product of the slide block.
In the preparation process of the sliding block, silver is deposited on the surface of the bamboo charcoal by using a vacuum deposition method, and then the silver is pressed into the bamboo charcoal by using a pressurizing mode, so that the effect of fully filling air holes is achieved, the density of the bamboo charcoal soaked with the silver is obviously increased, the compactness of the alloy is further improved, and the comprehensive performance of the alloy is improved. And the preparation of the sliding block is carried out by adopting a powder metallurgy method, so how to obtain proper powder particle size has great influence on the performance of the molded and sintered product. The invention adopts the powder process of circulating hydrogenation-dehydrogenation, not only obtains the particle size of a proper sliding block, but also can obviously reduce the content of impurity elements in the alloy. The invention preferably recycles 5 times the alloy block under the conditions of 650 ℃ and 0.5MPa to obtain high-quality alloy powder with the grain diameter of 10-50 mu m, the O content of less than 2000 mu g/g and the H content of less than 20 mu g/g, and finally forms a sliding block with good comprehensive performance. The powder preparation process of the circulating hydrogenation-dehydrogenation can also endow the powder with a certain sound absorption effect, so that a mute slide block is obtained.
Preferably, the vacuum preheating temperature in the step (1) is a temperature at which sticky and slippery carbon graphite appears on the surface of the bamboo charcoal.
When the bamboo charcoal surface appears sticky and slippery state, part of bamboo charcoal is graphitized, the self-lubricating property of the bamboo charcoal is improved, a path for kaolin to enter the interior of the bamboo charcoal is provided, and silver can better permeate into air holes under smaller applied pressure.
Preferably, the number of times of the cyclic hydrogenation-dehydrogenation treatment in the step (3) is 5 to 7.
Preferably, the temperature of the aging treatment in the step (4) is 150 ℃ and 250 ℃, and the time of the aging treatment is 6-10 h.
Because the material composition and the content of the alloy are changed, the aging treatment is needed to improve the hardness and the strength of the alloy in the later preparation period, and the possibility that the size and the shape of the sliding block are changed in long-term use is eliminated.
Compared with the prior art, the invention has the following advantages:
(1) the bamboo charcoal can be used as one of carbon elements to assist and reinforce the aluminum alloy, and has a series of advantages of good heat conduction (heat dissipation), high temperature resistance, corrosion resistance, self-lubrication, good chemical stability, low thermal expansion coefficient and the like.
(2) The kaolin of the invention is added into the bamboo charcoal as an additive, which not only can fill the internal pores of the bamboo charcoal and improve the strength of the bamboo charcoal, but also improves the wear resistance and oxidation resistance of the alloy and has the effect of reinforcement.
(3) The invention also carries out silver leaching treatment on the bamboo charcoal, and carries out air hole filling in a silver leaching way, thereby increasing the compactness of the bamboo charcoal to the maximum extent and improving the contact degree of the silver-leached bamboo charcoal material and the alloy.
(4) According to the invention, the aluminum alloy can be more suitable for improving the performance of the sliding block by changing the components and content changes of the alloy addition elements and combining the aging treatment process.
Detailed Description
The following are specific examples of the present invention and further describe the technical solutions of the present invention, but the present invention is not limited to these examples.
Example 1
Preparing materials: weighing the raw materials according to the ratio of the aluminum alloy, wherein the raw materials comprise silver-impregnated bamboo charcoal: 0.3%, Si: 0.15%, Mn: 0.3%, Ni: 0.09% of Al and impurities, wherein the silver-impregnated bamboo charcoal consists of ultrafine bamboo charcoal with the content accounting for 74% of the silver-impregnated bamboo charcoal, nano-silver particles with the content accounting for 17% of the silver-impregnated bamboo charcoal and kaolin powder with the content accounting for 9% of the silver-impregnated bamboo charcoalThe distribution of the nano-silver particles on the superfine bamboo charcoal is 50 nano-silver/mm2Bamboo charcoal;
pretreatment: preheating superfine bamboo charcoal in vacuum until sticky and smooth carbon graphite appears on the surface of the bamboo charcoal, uniformly spreading kaolin powder on the surface of the bamboo charcoal, continuously heating and pressurizing to form composite bamboo charcoal, depositing nano silver on the surface of the composite bamboo charcoal, naturally cooling and crushing to obtain silver-impregnated bamboo charcoal particles;
smelting: mixing and melting all materials except the silver-impregnated bamboo charcoal to form alloy liquid, naturally cooling to a semi-solid state, uniformly spreading silver-impregnated carbon particles on the surface of the semi-solid alloy, pressing, continuously heating until the alloy is in a liquid state, fully mixing, and cooling to obtain an alloy block;
powder making and forming: carrying out cyclic hydrogenation-dehydrogenation treatment on the alloy block for 6 times to form alloy powder, filling the powder into a die and pressing to obtain a semi-finished slider;
and (3) finished product: and sintering the semi-finished product of the sliding block, and then carrying out aging treatment for 8 hours at 200 ℃ to obtain a finished product of the sliding block.
Example 2
Preparing materials: weighing the raw materials according to the ratio of the aluminum alloy, wherein the raw materials comprise silver-impregnated bamboo charcoal: 0.1%, Si: 0.1%, Mn: 0.2%, Ni: 0.06 percent, and the balance of Al and impurities, wherein the silver-impregnated bamboo charcoal consists of superfine bamboo charcoal with the content accounting for 70 percent of the silver-impregnated bamboo charcoal, nano-silver particles with the content accounting for 22 percent of the silver-impregnated bamboo charcoal, and kaolin powder with the content accounting for 8 percent of the silver-impregnated bamboo charcoal, and the distribution of the nano-silver particles on the superfine bamboo charcoal is 20 nano-silver/mm2Bamboo charcoal;
pretreatment: preheating superfine bamboo charcoal in vacuum until sticky and smooth carbon graphite appears on the surface of the bamboo charcoal, uniformly spreading kaolin powder on the surface of the bamboo charcoal, continuously heating and pressurizing to form composite bamboo charcoal, depositing nano silver on the surface of the composite bamboo charcoal, naturally cooling and crushing to obtain silver-impregnated bamboo charcoal particles;
smelting: mixing and melting all materials except the silver-impregnated bamboo charcoal to form alloy liquid, naturally cooling to a semi-solid state, uniformly spreading silver-impregnated carbon particles on the surface of the semi-solid alloy, pressing, continuously heating until the alloy is in a liquid state, fully mixing, and cooling to obtain an alloy block;
powder making and forming: carrying out cyclic hydrogenation-dehydrogenation treatment on the alloy block for 6 times to form alloy powder, filling the powder into a die and pressing to obtain a semi-finished slider;
and (3) finished product: and sintering the semi-finished product of the sliding block, and then carrying out aging treatment for 8 hours at 200 ℃ to obtain a finished product of the sliding block.
Example 3
Preparing materials: weighing the raw materials according to the ratio of the aluminum alloy, wherein the raw materials comprise silver-impregnated bamboo charcoal: 0.5%, Si: 0.2%, Mn: 0.4%, Ni: 0.12 percent of Al and impurities, wherein the silver-impregnated bamboo charcoal consists of ultrafine bamboo charcoal with the content accounting for 78 percent of the silver-impregnated bamboo charcoal, nano-silver particles with the content accounting for 12 percent of the silver-impregnated bamboo charcoal and kaolin powder with the content accounting for 10 percent of the silver-impregnated bamboo charcoal, and the distribution of the nano-silver particles on the ultrafine bamboo charcoal is 80 nano-silver/mm2Bamboo charcoal;
pretreatment: preheating superfine bamboo charcoal in vacuum until sticky and smooth carbon graphite appears on the surface of the bamboo charcoal, uniformly spreading kaolin powder on the surface of the bamboo charcoal, continuously heating and pressurizing to form composite bamboo charcoal, depositing nano silver on the surface of the composite bamboo charcoal, naturally cooling and crushing to obtain silver-impregnated bamboo charcoal particles;
smelting: mixing and melting all materials except the silver-impregnated bamboo charcoal to form alloy liquid, naturally cooling to a semi-solid state, uniformly spreading silver-impregnated carbon particles on the surface of the semi-solid alloy, pressing, continuously heating until the alloy is in a liquid state, fully mixing, and cooling to obtain an alloy block;
powder making and forming: carrying out cyclic hydrogenation-dehydrogenation treatment on the alloy block for 6 times to form alloy powder, filling the powder into a die and pressing to obtain a semi-finished slider;
and (3) finished product: and sintering the semi-finished product of the sliding block, and then carrying out aging treatment for 8 hours at 200 ℃ to obtain a finished product of the sliding block.
Example 4
Preparing materials: weighing the raw materials according to the ratio of the aluminum alloy, wherein the raw materials comprise silver-impregnated bamboo charcoal: 0.3%, Si: 0.15%, Mn: 0.3%, Ni: 0.09% of Al and impurities, wherein the silver-impregnated bamboo charcoal comprises superfine bamboo charcoal with a content of 74% of the silver-impregnated bamboo charcoal, nano-silver particles with a content of 17% of the silver-impregnated bamboo charcoal, and kaolin powder with a content of 9% of the silver-impregnated bamboo charcoal, and the nano-silver particles are arranged in the superfine bamboo charcoalThe distribution of the silver particles is 50 nano silver/mm2Bamboo charcoal;
pretreatment: preheating superfine bamboo charcoal in vacuum until sticky and smooth carbon graphite appears on the surface of the bamboo charcoal, uniformly spreading kaolin powder on the surface of the bamboo charcoal, continuously heating and pressurizing to form composite bamboo charcoal, depositing nano silver on the surface of the composite bamboo charcoal, naturally cooling and crushing to obtain silver-impregnated bamboo charcoal particles;
smelting: mixing and melting all materials except the silver-impregnated bamboo charcoal to form alloy liquid, naturally cooling to a semi-solid state, uniformly spreading silver-impregnated carbon particles on the surface of the semi-solid alloy, pressing, continuously heating until the alloy is in a liquid state, fully mixing, and cooling to obtain an alloy block;
powder making and forming: carrying out cyclic hydrogenation-dehydrogenation treatment on the alloy block for 5 times to form alloy powder, filling the powder into a die and pressing to obtain a semi-finished slider;
and (3) finished product: and sintering the semi-finished product of the sliding block, and then carrying out aging treatment for 6 hours at 150 ℃ to obtain a finished product of the sliding block.
Example 5
Preparing materials: weighing the raw materials according to the ratio of the aluminum alloy, wherein the raw materials comprise silver-impregnated bamboo charcoal: 0.3%, Si: 0.15%, Mn: 0.3%, Ni: 0.09% of Al and impurities, wherein the silver-impregnated bamboo charcoal consists of superfine bamboo charcoal with the content accounting for 74% of the silver-impregnated bamboo charcoal, nano-silver particles with the content accounting for 17% of the silver-impregnated bamboo charcoal and kaolin powder with the content accounting for 9% of the silver-impregnated bamboo charcoal, and the distribution of the nano-silver particles on the superfine bamboo charcoal is 50 nano-silver/mm2Bamboo charcoal;
pretreatment: preheating superfine bamboo charcoal in vacuum until sticky and smooth carbon graphite appears on the surface of the bamboo charcoal, uniformly spreading kaolin powder on the surface of the bamboo charcoal, continuously heating and pressurizing to form composite bamboo charcoal, depositing nano silver on the surface of the composite bamboo charcoal, naturally cooling and crushing to obtain silver-impregnated bamboo charcoal particles;
smelting: mixing and melting all materials except the silver-impregnated bamboo charcoal to form alloy liquid, naturally cooling to a semi-solid state, uniformly spreading silver-impregnated carbon particles on the surface of the semi-solid alloy, pressing, continuously heating until the alloy is in a liquid state, fully mixing, and cooling to obtain an alloy block;
powder making and forming: carrying out cyclic hydrogenation-dehydrogenation treatment on the alloy block for 7 times to form alloy powder, filling the powder into a die and pressing to obtain a semi-finished slider;
and (3) finished product: and sintering the semi-finished product of the sliding block, and then carrying out aging treatment for 10 hours at 250 ℃ to obtain a finished product of the sliding block.
Example 6
The difference from the example 1 is only that the content of the silver-impregnated bamboo charcoal in the aluminum alloy raw material of the example 6 is 0.05%.
Example 7
The difference from the example 1 is that the content of the silver-impregnated bamboo charcoal in the aluminum alloy raw material of the example 7 is 0.55%.
Example 8
The difference from the example 1 is that the distribution of the silver-impregnated bamboo charcoal nano-silver particles on the ultrafine bamboo charcoal is 19 nano-silver/mm in the example 82Bamboo charcoal.
Example 9
The difference from the example 1 is that the distribution of the silver-impregnated bamboo charcoal nano-silver particles on the ultrafine bamboo charcoal in the example 9 is 81 nano-silver/mm2Bamboo charcoal.
Example 10
The only difference from example 1 is that the Mn content in the aluminum alloy material of example 10 is 0.19%.
Example 11
The only difference from example 1 is that the Mn content in the aluminum alloy material of example 11 is 0.41%.
Example 12
The only difference from example 1 is that example 12 had 4 cycles of hydro-dehydro-treatment.
Example 13
The only difference from example 1 is that example 13 had 8 cycles of hydro-dehydro-treatment.
Example 14
The only difference from example 1 is that the temperature of the aging treatment of example 14 is 140 ℃.
Example 15
The only difference from example 1 is that the temperature of the aging treatment in example 15 is 260 ℃.
Example 16
The only difference from example 1 is that the aging treatment time of example 16 is 5 hours.
Example 17
The only difference from example 1 is that the aging treatment time of example 17 is 11 hours.
Comparative example 1
The only difference from example 1 is that the aluminum alloy composition of comparative example 1 does not contain silver impregnated bamboo charcoal.
Comparative example 2
The only difference from example 1 is that the silver impregnated bamboo charcoal of comparative example 2 does not contain kaolin powder.
Comparative example 3
The only difference from example 1 is that the aluminum alloy composition of comparative example 3 does not contain Mn.
Comparative example 4
The difference from the example 1 is that the comparative example 4 directly mixes and melts the silver-impregnated bamboo charcoal with other raw materials to form an alloy block.
Comparative example 5
The only difference from example 1 is that comparative example 5 does not subject the bulk alloy to a cyclic hydrogenation-dehydrogenation treatment.
The sliders of examples 1 to 17 and comparative examples 1 to 5 were tested for strength, elongation, corrosion resistance and hardness, and the results are shown in Table 1:
table 1: properties of sliders in examples 1 to 17 and comparative examples 1 to 5
The corrosion resistance data in the table refers to the time when corrosion points appear on the surface of the worm, and the existence, content and variety and content change of other elements of Mn cause great change of the performance of the slide block, so the slide block is a linkage effect which is difficult to divide.
While the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope thereof.
Claims (2)
1. The ultra-silent roller hinge link slider is characterized in that the slider is made of aluminum alloy, and the aluminum alloy is composed of the following raw materials in percentage by mass: soaking the silver bamboo charcoal: 0.1-0.5%, Si: 0.1-0.2%, Mn: 0.2-0.4%, Ni: 0.06-0.12 percent of silver-impregnated bamboo charcoal, and the balance of Al and impurities, wherein the silver-impregnated bamboo charcoal comprises 70-78 percent of superfine bamboo charcoal, 12-22 percent of nano silver particles and 5-10 percent of kaolin powder; the preparation process of the silver-impregnated bamboo charcoal comprises the following steps: the superfine bamboo charcoal is preheated in vacuum, then kaolin powder is uniformly spread on the surface of the bamboo charcoal, composite bamboo charcoal is formed by continuously heating and pressurizing, then nano silver is deposited on the surface of the composite bamboo charcoal, and the silver-impregnated bamboo charcoal particles are obtained by natural cooling and crushing.
2. The slider as claimed in claim 1, wherein the distribution of the silver impregnated bamboo charcoal nano silver particles on the ultra-fine bamboo charcoal is 20-80 nano silver/mm2Bamboo charcoal.
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| CN108672702A (en) * | 2018-05-21 | 2018-10-19 | 宁波市奇强精密冲件有限公司 | Damper knuckle support |
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