CN117448624A - Alloy powder for sliding bearing and preparation method thereof - Google Patents

Alloy powder for sliding bearing and preparation method thereof Download PDF

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Publication number
CN117448624A
CN117448624A CN202311440112.4A CN202311440112A CN117448624A CN 117448624 A CN117448624 A CN 117448624A CN 202311440112 A CN202311440112 A CN 202311440112A CN 117448624 A CN117448624 A CN 117448624A
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Prior art keywords
alloy powder
smelting
sliding bearings
alloy
percentage
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Inventor
李红革
柏厚义
李伟
戴先武
叶伟
文可馨
冯厚斌
明磊
张鑫
黎伟
曾昱滔
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Chongqing Wangjiang Industrial Co ltd Jiangsu Branch
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Chongqing Wangjiang Industrial Co ltd Jiangsu Branch
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Publication of CN117448624A publication Critical patent/CN117448624A/en
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    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/02—Alloys based on copper with tin as the next major constituent
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/05—Metallic powder characterised by the size or surface area of the particles
    • 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
    • B22F1/00—Metallic powder; Treatment of metallic powder, e.g. to facilitate working or to improve properties
    • B22F1/06—Metallic powder characterised by the shape of the particles
    • B22F1/065—Spherical particles
    • 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
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C—CHEMISTRY; METALLURGY
    • C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
    • C22C—ALLOYS
    • C22C9/00—Alloys based on copper
    • C22C9/01—Alloys based on copper with aluminium as the next major constituent
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/02—Parts of sliding-contact bearings
    • F16C33/04—Brasses; Bushes; Linings
    • F16C33/06—Sliding surface mainly made of metal
    • F16C33/12—Structural composition; Use of special materials or surface treatments, e.g. for rust-proofing
    • F16C33/121—Use of special materials
    • 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
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0836—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid with electric or magnetic field or induction
    • 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
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0844—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid in controlled atmosphere
    • 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
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0848—Melting process before atomisation
    • 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
    • B22F9/06—Making metallic powder or suspensions thereof using physical processes starting from liquid material
    • B22F9/08—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying
    • B22F9/082—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid
    • B22F2009/0896—Making metallic powder or suspensions thereof using physical processes starting from liquid material by casting, e.g. through sieves or in water, by atomising or spraying atomising using a fluid particle transport, separation: process and apparatus
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00—Technologies related to metal processing
    • Y02P10/25—Process efficiency

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • General Engineering & Computer Science (AREA)
  • Nanotechnology (AREA)
  • Powder Metallurgy (AREA)
  • Manufacture Of Metal Powder And Suspensions Thereof (AREA)

Abstract

The invention relates to the technical field of alloy preparation, in particular to alloy powder for a sliding bearing and a preparation method thereof, wherein the alloy powder for the sliding bearing comprises the following components in percentage by weight: cu: 80-87%; sn: 4-10%; al: 4-10%; ni: 2-4%; fe:4 to 6 percent; mn:0.5 to 2.5 percent. The preparation method comprises S1 premelting; s2, smelting; s3, atomization preparation; s4, screening, drying and the like. The invention solves the technical problem of high preparation cost of the alloy for the existing sliding bearing.

Description

Alloy powder for sliding bearing and preparation method thereof
Technical Field
The invention relates to the technical field of alloy production and manufacturing, in particular to alloy powder for a sliding bearing and a preparation method thereof.
Background
The alloy is one of the common materials for manufacturing sliding bearings, and among them, cu—sn—ni (copper-tin-nickel) based alloys have been widely used for manufacturing sliding bearings due to their excellent corrosion resistance, antifriction property, heat conduction property and machinability.
In the prior art, as disclosed in the chinese patent with publication number CN105463243a, a sliding bearing alloy material and a preparation method thereof are provided, in which precious metal elements, rare earth elements, aluminum elements and lubricant elements (bismuth and carbon) are added into a Cu-Sn-Ni alloy, and the preparation method of vacuum melting casting is combined, so that the compressive strength of the alloy is improved, and the sliding bearing alloy material is used for manufacturing a sliding bearing, so that the sliding bearing has better wear resistance and fatigue resistance.
However, the above prior art has the following problems:
1. the alloy material uses a large amount of rare earth elements and noble metal elements, so that the alloy manufacturing cost is greatly increased, and the large-scale industrial production and application are not facilitated;
2. the traditional manufacturing process is adopted to cast, and the casting process is more affected by human factors, so that the consistency of the alloy quality is not high, the internal grain structure is coarse and has component segregation, and the service life and the reliability of the sliding bearing are affected.
Disclosure of Invention
The invention provides alloy powder for a sliding bearing and a preparation method thereof, which are used for solving the technical problems of high manufacturing cost and lagging production and manufacturing process when the existing Cu-Sn-Ni alloy is used for preparing the sliding bearing.
The application provides the following technical scheme, an alloy powder for a sliding bearing comprises the following components in percentage by weight: cu: 80-87%; sn: 4-10%; al: 4-10%; ni:1 to 3 percent; fe: 3-5%; mn:0.5 to 1.5 percent.
The principle and the beneficial effects of the invention are as follows:
the applicant mainly engages in the design and manufacture of wind power gearboxes, wherein the wind power gearboxes need to be applied to more sliding bearings, and compared with other sliding bearings, the wind power sliding bearings have higher requirements on surface hardness and wear resistance on performance level. More specifically, the wind power sliding bearing needs to have both wear resistance and antifriction performance while ensuring sufficient surface hardness.
The prior art solves the problems mainly by two methods: one is to add rare earth metals and noble metals to copper tin nickel alloys to regulate the strength and hardness of the alloys, as described in the background; and secondly, selecting high-entropy alloy powder, and preparing the alloy powder suitable for the wind power sliding bearing by blending the component proportion of alloy elements. However, the above solutions all require expensive noble metals, which makes the production cost high. Meanwhile, the strength and hardness of the alloy are regulated by adding rare earth metal and noble metal into the copper-tin-nickel alloy, so that the surface hardness of the alloy is often improved too much, the antifriction performance of the alloy is lost, and the same problem exists when the high-entropy alloy is used.
The inventor innovates and reforms on the basis of the use of the existing copper-tin-nickel alloy, properly blends the components of the copper-tin-nickel alloy under the condition of not introducing noble metal, introduces a proper amount of Al element and a small amount of Fe and Mn element, improves the mechanical property of the original copper-tin-nickel alloy, can improve the antifriction property of the alloy material by utilizing the interaction of Mn and Fe, and ensures that the alloy has good self-lubricating property.
Further, the alloy powder for the sliding bearing comprises the following components in percentage by weight: cu:81% of a glass fiber; sn:8%; al:4%; ni:2%; fe:4%; mn:1%.
In the application, the alloy powder prepared from the components in the weight ratio has balanced mechanical property and self-lubricating property.
Further, the alloy powder for the sliding bearing comprises the following components in percentage by weight: cu:81% of a glass fiber; sn:4%; al:8%; ni:2%; fe:4%; mn:1%.
In the application, the alloy powder prepared by the components in weight ratio has better mechanical property, and the self-lubricating property of the alloy powder can reach the use standard of the sliding bearing.
Further, the alloy powder for the sliding bearing comprises the following components in percentage by weight: cu:81% of a glass fiber; sn:6%; al:6%; ni:2%; fe:4%; mn:1%.
In the application, the alloy powder prepared from the components in the weight ratio has better self-lubricating performance and simultaneously can have the mechanical properties required by the sliding bearing.
Further, in the alloy powder for a sliding bearing, when the weight percentage of any one of Sn and Al is at a maximum value or a minimum value, the weight percentage of the other one is not at the maximum value or the minimum value.
In the application, when Sn and Al respectively take end point weight fractions, the proportion of Sn and Al elements in the alloy is disordered, cracks can occur in alloy powder, and the mechanical properties of the alloy are seriously slipped.
The application also includes a preparation method of the alloy powder for the sliding bearing, which comprises the following steps:
s1, premelting: uniformly mixing the raw materials according to the mass percentage, charging protective gas in a vacuum environment, pre-smelting by using a non-consumable electrode arc smelting furnace, and cooling after smelting to obtain a pre-smelting mixture;
s2, smelting: vacuum high-frequency induction smelting is carried out on the premelting mixture to obtain a smelting mixture;
s3, preparing alloy powder: performing gas atomization on the smelting mixture in a vacuum environment to prepare alloy powder, and preparing copper-base alloy powder with different particle sizes;
s4, screening and drying: and (3) screening the particle size of the copper-based alloy powder, drying the powder, and vacuum packaging and storing the powder.
The method has the beneficial effects that: the method adopts vacuum non-consumable electrode arc premelting-vacuum high-frequency induction melting-vacuum induction gas atomization operation treatment, avoids the formation of second phase particles with slow melt cooling speed, coarse microstructure, component segregation and coarse, ensures reasonable alloy powder particle size distribution and fine microstructure gaps, and improves the mechanical property and self-lubricating property of the alloy powder.
Further, pure simple substance blanks are adopted as raw materials in the S1, and the purity of the blanks is not lower than 99.99%.
In the application, the impurity in the prepared alloy can be effectively reduced by using the simple substance blank with higher purity, and the mechanical property of the alloy material is obviously improved.
Further, the vacuum degree of the vacuum environment in the S1 is 5 multiplied by 10 -4 Pa, the shielding gas comprising argon; the current intensity of the non-consumable electrode arc melting furnace is 200-500A, the melting time is 5-10 min, the melting times are 5-10 times, and the cooling time is 15-30 min.
In the application, the non-consumable electrode arc melting furnace is used for pre-melting the alloy raw materials, so that the melting time can be effectively reduced, the melting temperature is high, the protection is good, and sintering loss of the raw materials in the pre-melting process can be avoided.
Further, the vacuum degree of the vacuum environment in the step S2 is 4-10 Pa, and the protective gas is argon; the induction power is set to 15-30 kW, and the induction time is set to 15-30 min.
In the application, the alloy powder is smelted by using a high-frequency induction smelting technology, and the alloy powder is high-efficiency, environment-friendly, low in use cost and environment-friendly compared with modes such as high-temperature solid solution and the like; secondly, the high-frequency induction smelting technology has high smelting temperature, and ensures the full uniformity of alloy raw materials.
Further, the gas atomization gas in the step S3 comprises high-purity argon, and the vacuum degree of the vacuum environment is not lower than 5 multiplied by 10 -4 Pa; the induction smelting power is set to 15-30 kW, and the induction smelting time is set to 15-30 min.
In this application, use vacuum atomization technique to smelt alloy cooling powder process, can be fast with alloy liquid quick condensation into solid powder, eliminated because the longer macrosegregation and the coarse problem of microstructure that lead to the second phase appear in the alloy of condensation time.
In the step S4, the grain size of the alloy powder after screening is 50-150 mu m, and the median is kept at 95-105 mu m.
In the application, the alloy powder is screened to keep the grain size range in a proper range, so that the mechanical property and the self-lubricating property of the alloy powder can be effectively improved. The wide particle size distribution of the alloy powder results in a decrease in the mechanical properties of the alloy powder.
Drawings
FIG. 1 is an SEM (scanning electron microscope) image of alloy powder in example 1 of the present invention;
FIG. 2 is a metallographic structure diagram of the alloy powder in example 1 of the present invention;
FIG. 3 is an SEM image of alloy powder of comparative example 1 of the present invention;
FIG. 4 is an SEM image of alloy powder of comparative example 7 of the present invention.
Detailed Description
The following is a further detailed description of the embodiments:
example 1
An alloy powder for a sliding bearing, wherein the alloy powder comprises the following chemical components in percentage by mass: cu:81% of a glass fiber; sn:8%; al:4%; ni:2%; fe:4%; mn:1%. The preparation process of the alloy powder for the sliding bearing comprises the following steps of:
s1, premelting: uniformly mixing the raw materials according to the mass percentage, charging protective gas in a vacuum environment, pre-smelting by using a non-consumable electrode arc smelting furnace, and cooling after smelting to obtain a pre-smelting mixture;
specifically, simple substance blanks with corresponding mass are weighed and put into a non-consumable electrode arc melting furnace for vacuum pre-melting, and the vacuum degree is 5 multiplied by 10 -4 Pa, the shielding gas includes argon. The current intensity of the smelting furnace is 300A, the single smelting time is 5 minutes, the smelting is 8 times, and the cooling is carried out for 20 minutes, so as to obtain a pre-smelting mixture.
S2, smelting: vacuum high-frequency induction smelting is carried out on the premelting mixture to obtain a smelting mixture;
specifically, the premelting mixture obtained in the step S1 is put into a high-frequency induction melting furnace for vacuum melting, wherein the vacuum degree is set to be 6Pa, and the shielding gas is argon. The induction power was set at 20kW and the induction time was set at 20min to obtain a smelting mixture.
S3, preparing alloy powder: performing gas atomization on the smelting mixture in a vacuum environment to prepare alloy powder, and preparing copper-base alloy powder with different particle sizes;
specifically, the vacuum atomization process conditions include high purity argon as shielding gas, and vacuum degree of 5×10 -4 Pa; the induction smelting power was set at 20kW and the induction smelting time was set at 20min. After the smelting mixture is completely alloyed, the temperature of the melt is adjusted to 1200 ℃, and then argon is adopted for atomization to prepare powder, wherein the atomization pressure is 3.5-3.6 MPa.
S4, screening and drying: and (3) screening the particle size of the copper-based alloy powder, drying the powder, and vacuum packaging and storing the powder.
Specifically, the copper alloy powder prepared by atomization is screened in a vacuum glove box, and the alloy powder with the grain diameter of 50-150 mu m and the median of 95-105 mu m is screened out and stored in a vacuum packaging way.
The microstructure of the alloy powder in this example is shown in FIGS. 1-3.
Example 2
The present embodiment differs from the first embodiment in that the weight fraction of the alloy powder component is different. Specific: cu:81% of a glass fiber; sn:4%; al:8%; ni:2%; fe:4%; mn:1%.
Example 3
The present embodiment differs from the first embodiment in that the weight fraction of the alloy powder component is different. Specific: cu:81% of a glass fiber; sn:6%; al:6%; ni:2%; fe:4%; mn:1%.
Comparative example 1
The comparative example differs from example one in that the addition amount of Al in the alloy powder was reduced to 2% by weight. Specific: cu:87%; sn:8%; al:2%; ni:2%; fe:4%; mn:1%.
Comparative example 2
The comparative example differs from example one in that the addition amount of Al in the alloy powder was increased to make up 12% by weight. Specific: cu: 77%. Sn:8%; al:12%; ni:2%; fe:4%; mn:1%.
Comparative example 3
The comparative example differs from example one in that no Mn was added. The specific mass percentages of other components are as follows: cu:82%; sn:8%; al:4%; ni:2%; fe:4%.
Comparative example 4
This comparative example differs from example one in that no Fe was added. The specific mass percentages of other components are as follows: cu:85%; sn:8%; al:4%; ni:2%; mn:1%.
Comparative example 5
The comparative example differs from example one in that Fe and Mn are different in mass fraction. Specifically, cu:82.5%; sn:8%; al:4%; ni:2%; fe:3%; mn:0.5%.
Comparative example 6
The comparative example is the same as the alloy composition and mass percent of example one. Except that the alloy was prepared using a conventional casting method.
Comparative example 7
The comparative example is identical to the alloy composition and mass percent of example 1, except that there is no S4 step. The microstructure of the alloy powder in this comparative example is shown in FIG. 4.
The weight percentages of the components of the above examples and comparative examples are summarized in Table 1.
Table 1: weight percent of each component and performance data for examples and comparative examples
As is clear from the comparison of the data of comparative examples 1 and 2 with the data of examples, the addition amount of Al element is reduced, and the strength of the obtained cladding layer is obviously reduced; the addition amount of Al element is increased, the strength of the prepared cladding layer is obviously increased, and the friction coefficient of the cladding layer is higher, so that the cladding layer is not suitable for the use of sliding bearings.
As is clear from the comparison of the data of comparative examples 3 and 4 with the data of examples, the strength of the obtained cladding layer is greatly different without adding Fe and Mn, and the friction coefficient of the material is increased under the condition of low strength, so that the self-lubricating property of the material is obviously reduced.
As is clear from the comparison of the data of comparative example 5 and examples, the particle size distribution of the obtained powder is widened by decreasing the addition amounts of Fe and Mn elements, respectively. The strength of the material is reduced.
As can be seen from the comparison of the data of comparative example 6 and the data of examples, the mechanical properties of the alloy prepared by casting are reduced more than those of the preparation method of the application.
As is clear from the comparison of the data of comparative example 7 and the data of examples, the powder of the alloy has a large particle size range after the powder is not screened, resulting in poor flowability of the powder in the subsequent preparation and poor cladding effect, and thus the cladding layer obtained therefrom is poor in hardness and strength. As can be seen from the SEM image in the drawings, more impurities are attached to the surface of the alloy, and the alloy has larger porosity when the alloy is formed later, so that the alloy has poorer strength and hardness, and has larger friction coefficient.
The above is merely an embodiment of the present invention, and the present invention is not limited to the field of the present embodiment, but the specific structure and characteristics of the present invention are not described in detail. It should be noted that modifications and improvements can be made by those skilled in the art without departing from the structure of the present invention, and these should also be considered as the scope of the present invention, which does not affect the effect of the implementation of the present invention and the utility of the patent. The protection scope of the present application shall be subject to the content of the claims, and the description of the specific embodiments and the like in the specification can be used for explaining the content of the claims.

Claims (10)

1. An alloy powder for sliding bearings, characterized in that: comprises the following components in percentage by weight: cu: 80-87%; sn: 4-10%; al: 4-10%; ni:1 to 3 percent; fe: 3-5%; mn:0.5 to 1.5 percent.
2. An alloy powder for sliding bearings according to claim 1, wherein: comprises the following components in percentage by weight: cu:81% of a glass fiber; sn:8%; al:4%; ni:2%; fe:4%; mn:1%.
3. An alloy powder for sliding bearings according to claim 1, wherein: comprises the following components in percentage by weight: cu:81% of a glass fiber; sn:4%; al:8%; ni:2%; fe:4%; mn:1%.
4. An alloy powder for sliding bearings according to claim 1, wherein: comprises the following components in percentage by weight: cu:81% of a glass fiber; sn:6%; al:6%; ni:2%; fe:4%; mn:1%.
5. An alloy powder for sliding bearings according to claim 1, characterized in that: when the weight percentage of any one of Sn and Al takes the maximum value or the minimum value, the weight percentage of the other one does not take the maximum value or the minimum value.
6. A method for producing an alloy powder for sliding bearings according to any one of claims 1 to 5, comprising the steps of:
s1, premelting: uniformly mixing the raw materials according to the mass percentage, charging protective gas in a vacuum environment, pre-smelting by using a non-consumable electrode arc smelting furnace, and cooling after smelting to obtain a pre-smelting mixture;
s2, smelting: vacuum high-frequency induction smelting is carried out on the premelting mixture to obtain a smelting mixture;
s3, preparing alloy powder: performing gas atomization on the smelting mixture in a vacuum environment to prepare alloy powder, and preparing copper-base alloy powder with different particle sizes;
s4, screening and drying: and (3) screening the particle size of the copper-based alloy powder, drying the powder, and vacuum packaging and storing the powder.
7. The method for producing an alloy powder for sliding bearings according to claim 6, characterized in that: the vacuum degree of the vacuum environment in the S1 is 5 multiplied by 10 -4 Pa, the shielding gas comprising argon; the current intensity of the non-consumable electrode arc melting furnace is 200-500A, the melting time is 5-10 min, the melting times are 5-10 times, and the cooling time is 15-30 min.
8. The method for producing an alloy powder for sliding bearings according to claim 7, characterized in that: the vacuum degree of the vacuum environment in the step S2 is 4-10 Pa, and the protective gas is argon; the high-frequency induction smelting power is set to 15-30 kW, and the smelting time is set to 15-30 min.
9. The method for producing an alloy powder for sliding bearings according to claim 8, characterized in that: the gas atomization gas in the S3 comprises high-purity argon, and the vacuum degree of the vacuum environment is not lower than 5 multiplied by 10 -4 Pa; the induction smelting power is set to 15-30 kW, and the induction smelting time is set to 15～30min。
10. The method for producing an alloy powder for sliding bearings according to claim 6, characterized in that: in the S4, the grain diameter ranges from 50 to 150 mu m, and the median is kept between 95 and 105 mu m.
CN202311440112.4A 2023-10-31 2023-10-31 Alloy powder for sliding bearing and preparation method thereof Pending CN117448624A (en)

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