Steel-based copper alloy bearing bush manufactured by laser cladding technology
By using laser cladding to prepare a copper alloy functional layer on a steel substrate, the problem of low bonding strength of copper alloy bearings is solved, enabling the manufacturing of high-performance, low-cost copper alloy bearings suitable for high-power engines.
Patent Information
- Application Number
- CN202520111788.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-17
- Publication Date
- 2025-11-21
- Estimated Expiration
- 2035-01-17
AI Technical Summary
Existing copper alloy bearings have low bonding strength and are prone to fatigue failure. Furthermore, traditional manufacturing methods are energy-intensive and inefficient, making it difficult to meet the requirements of high-power engines.
A copper alloy functional layer is prepared on a steel substrate using laser cladding technology. The copper alloy is then metallurgically bonded to the steel substrate through laser cladding technology, forming a steel-based copper alloy bearing with good density and high bonding strength.
It achieves high bonding strength of copper alloy bearings, excellent wear resistance and high pressure resistance, extends service life, and complies with the industrial policy of green remanufacturing, saving valuable elements.
Smart Images
Figure CN223578548U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to metallurgical equipment technical field, especially a kind of steel-based copper alloy bearing bush manufactured by laser cladding process. BACKGROUND
[0002] Bearing bush is the part of sliding bearing and journal contact, shape is the semicylindrical surface of tile, very smooth, generally use bronze, friction-reducing alloy etc. Wear-resistant material is made. Sliding bearing works, bearing bush and rotating shaft require a very thin oil film between them to play lubricating effect. If lubrication is poor, there is direct friction between bearing bush and rotating shaft, and friction can generate very high temperature, although bearing bush is made of special high-temperature alloy material, but the high temperature generated by direct friction is still enough to burn it out.
[0003] Copper alloy bearing bush is widely used because of good fatigue strength, resistance and friction reduction. The main preparation methods of copper alloy bearing bush material are centrifugal casting method and powder metallurgy sintering method. The bearing bush prepared by centrifugal casting method has high alloy and matrix bonding strength, high alloy density, but alloy composition is easy to segregate, thereby affecting alloy performance, high energy consumption and low production efficiency. Powder metallurgy is the currently widely used bearing bush material preparation process, but due to the process defects of powder metallurgy method, the alloy density of the prepared workpiece is low, the bonding strength is low, and the alloy fatigue shedding is easy to occur during the use of high-power engine. SUMMARY
[0004] In view of some defects in the production and technology of copper alloy bearing bush, the purpose of the utility model is to manufacture a steel-based copper alloy bearing bush with environmental protection, high pressure resistance, high temperature resistance, wear resistance, strong bonding force and good density by laser cladding process.
[0005] In order to achieve the above purpose, the technical scheme adopted by the utility model is as follows:
[0006] The steel-based copper alloy bearing bush comprises a steel base and a copper alloy functional layer. The steel base has two pieces and is in the shape of a circular arc. The copper alloy functional layer refers to the copper alloy layer prepared on the inner arc surface of the steel base.
[0007] Preferably, in order to realize the metallurgical combination of steel base and copper base, the advanced laser cladding process technology is selected.
[0008] The laser cladding technology is preferably a process method that places selected coating materials on the surface of a cladding base in different ways, and the coating materials and a thin layer of the base surface are simultaneously melted by laser irradiation, and a surface coating with extremely low dilution and metallurgical bonding with the base is formed after rapid solidification, so that the wear resistance, corrosion resistance, heat resistance, oxidation resistance and electrical properties of the base surface are significantly improved, so that the surface modification or repair purposes are achieved, the requirements for specific properties of the material surface are met, and a large amount of precious elements is saved.
[0009] Preferably, the steel base material is an alloy structural steel with good mechanical properties and processing properties, and the material used for preparing the copper alloy functional layer is a spherical copper-tin alloy powder with a particle size of 100-270 mesh.
[0010] Preferably, the copper alloy functional layer is located on the inner arc surface of the steel base bearing, and the thickness is about 2 mm.
[0011] Preferably, the steel base copper alloy bearing is composed of a steel base and a copper alloy functional layer prepared by laser cladding technology, and the steel base and the functional layer are metallurgically combined, and the bonding strength is not less than 90% of the bulk bonding strength.
[0012] The utility model implementation has the following technical effects:
[0013] The working surface of the steel base copper alloy bearing is a metallurgically combined bimetallic cladding layer, the copper alloy functional layer has good compactness and high bonding strength, and has better impact resistance and wear resistance in use, so that the bearing has very excellent performance. BRIEF DESCRIPTION OF DRAWINGS
[0014] Some specific embodiments of the utility model will be described in detail below with reference to the accompanying drawings in an exemplary but not limiting manner. The same reference signs in the drawings indicate the same or similar components or parts. Those skilled in the art should understand that the drawings are not necessarily drawn to scale.
[0015] Figure 1 is a schematic view of a steel base copper alloy bearing of an embodiment of the utility model;
[0016] Figure 2 is a half sectional view of the steel base copper alloy bearing,
[0017] The mark 001 shown in the figure represents a steel base of the bearing, and the mark 002 represents a copper alloy functional layer. DETAILED DESCRIPTION
[0018] The preferred embodiments of the utility model will be described in detail below with reference to the accompanying drawings.
[0019] As Figure 2As shown, the embodiment provides a laser cladding manufactured steel-based copper alloy bearing bush, which comprises a bearing bush body 001 and a laser cladding manufactured functional layer 002, the bearing bush body 001 is made of alloy steel, and the material is 42CrMo; the functional layer 002 is copper-tin alloy powder CuSn10, and the components according to the mass percentage are: Sn 10%, Cu balance.
[0020] Wherein, the laser cladding layer with metallurgical combination with the bearing bush is prepared on the inner arc surface of the bearing bush, and the phenomenon of falling off in the production process due to combination problems does not occur, the bimetallic cladding layer is resistant to high temperature, has good compactness and high pressure resistance, and effectively prolongs the service life of the bearing bush.
[0021] A steel-based copper alloy bearing bush can be realized by laser cladding technology, comprising the following steps:
[0022] (1) process the steel-based bearing bush to the required size, leaving a surplus to be laser cladded;
[0023] (2) pre-treatment before laser cladding:
[0024] (1) non-destructive testing of the bearing bush, no visible cracks are allowed;
[0025] (2) clean the cladding site, remove oil and rust, and the cladding area after treatment shows metallic luster;
[0026] (3) laser cladding
[0027] Laser cladding is performed to prepare a copper alloy functional layer, copper-tin alloy powder is laser cladded on the inner arc surface of the steel-based bearing bush to obtain a high-quality copper alloy functional layer; the thickness of the laser cladding layer is controlled at about 2.5mm, the thickness is detected between layers, the laser cladding power is 3.8KW, the spot diameter is 5mm, the scanning speed is 20mm / s, and the overlap rate is 50%;
[0028] (4) after the steel-based bearing bush is cooled to room temperature, it is machined into a shape according to the drawing on the machine.
[0029] The steel-based copper alloy bearing bush produced by the above method will not fall off due to combination problems, the copper alloy layer is resistant to wear and tear, has good compactness and excellent high pressure resistance, and meets the working conditions of the bearing bush.
[0030] The significant effect of the present application is:
[0031] This method belongs to a green remanufacturing production, which can not only manufacture new products, but also repair and strengthen old products, save a large amount of high-cost alloy, realize resource recycling, and meet the national circular economy industrial policy.
[0032] The method is convenient to operate, forms a layer of special alloy functional layer with excellent performance on the surface of carbon steel metal material, and is metallurgically combined with the base body to realize perfect combination of dissimilar metals.
[0033] To this end, those skilled in the art should recognize that, although the present utility model has been shown and described in detail herein in terms of a number of exemplary, many other variations or modifications, which, however, pertain to the principles of the present utility model, can be directly determined or deduced from the content disclosed by the present utility model without departing from the spirit and scope of the present utility model. Therefore, the scope of the present utility model should be understood and recognized as all these other variations or modifications.
Claims
1. A steel-based copper alloy bushing manufactured by a laser cladding technique, characterized in that, The steel-based copper alloy shaft comprises: a base: alloy steel material, split type, semicircular arc shape; a functional layer: copper alloy layer, located on the inner arc surface of the bush, and metallurgically combined with the base.
2. The steel-based copper alloy bushing manufactured by the laser cladding technique according to claim 1, wherein The steel-based copper alloy bush is composed of a base and a copper alloy functional layer prepared by laser cladding technology, and the copper alloy functional layer is metallurgically combined with the base, and the bonding strength is not less than 90% of the bulk bonding strength.
3. The steel-based copper alloy bushing manufactured by the laser cladding technique according to claim 2, wherein The thickness of the copper alloy functional layer is about 2mm.
4. The steel-based copper alloy bushing manufactured by the laser cladding technique according to claim 2, wherein The base material is alloy steel.
5. The steel-based copper alloy bushing manufactured by the laser cladding technique according to claim 1, wherein, The functional layer is high-quality copper alloy.