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Stratified composite material for sliding elements and method for production thereof
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A technology of multi-layer composite materials and sliding parts, applied in the direction of layered products, metal layered products, chemical instruments and methods, etc., can solve the problems that cannot be used in mass production
Inactive Publication Date: 2002-11-13
FEDERAL MOGUL WIESBADEN
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Problems solved by technology
This method is only suitable for large bearings and thus expensive components
In the case of small bearing sizes requiring steel thickness below 10 mm, this known method cannot be used for mass production
Method used
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Embodiment 1
[0054] CuAl9Ni3Fe
[0055] -1.6mm steel strip
[0056] -Base material is preheated to 1100°C by casting clad steel strip
[0057] The melting point of the bearing alloy is 1200°C,
[0058] -Cool down to freezing temperature within 30 seconds, then add 2.5
[0063] exist figure 1 A photograph of this as-cast multilayer composite can be seen in . On the steel base material 1 there is a thin bonding zone 2, which contains 88% Fe and 6% Cu, the remainder being other alloy components.
[0064] Bearing alloy 3 is located above bonding zone 2, and it includes a heterogeneous, dendritic structure, where the light-colored regions represent the alpha phase. The α and β phases are present in Bearing Alloy 3 in a ratio of 2.6.
Embodiment 2
[0066] CuZn40Al2
[0067] -1.6mm steel strip
[0068] -Base material is preheated to 1000°C by casting clad steel strip
[0069] The melting point of the bearing alloy is 1020°C,
[0070] - Cool down to the freezing temperature within 30 seconds, and then 2.5
[0075] Figure 2a and 2b is a photograph of a multilayer composite with as-cast bearing alloy CuZn40Al2. There is also a bond layer 2' between the steel base layer 1' and the bearing material 3', which contains 81% Fe and 8% Cu, and the rest are other alloy components.
[0076] This material also has a heterogeneous structure. image 3 The bonding strength (N / mm 2 ). The gray area is the control value of the measured value. CuAl9NiFe2 and CuZn40Al2 were tested as cast a...
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Abstract
A composite multilayer material and a method for the production thereof are described which are suitable for bearing points subject to mixed friction, said material being corrosion-resistant and cold-formable and capable of withstanding extremely high loads. According to the method, the backing material is preheated to a temperature of 1000° C. to 1100° C., a heterogeneously developing, lead-free copper-zinc- or copper-aluminum-based bearing alloy at a temperature of from 1000° C. to 1250° C. is cast thereon, and the composite multilayer material is cooled from the casting temperature of the bearing alloy to 100° C. within 2 to 4 minutes. A metallurgical bond zone (2) is present between the bearing alloy (3) and the backing material (1), which metallurgical bond zone (2) comprises 80-95% iron and the usual impurities, the rest being copper, and is crystallised in cubic form.
Description
technical field [0001] The invention relates to a method for producing multilayer composite materials for sliding parts, such as bearing shells or bearing sleeves, in which method bearing material is applied to a base material, in particular steel, by means of a continuous strip casting-cladding process superior. The invention also relates to a multilayer composite material for sliding parts, such as bearing shells or bearing sleeves, having a steel base material and a bearing alloy cast thereon. Background technique [0002] Bearing systems are generally used to absorb and transmit axial and radial forces between parts that move relative to each other. This means that, in practice, the bearings are required to rotate in a circle or move around an axis. Bearings are therefore indispensable in all machines and assemblies, especially in internal combustion engines. [0003] Studies of the most important support parts in modern internal combustion engines (main bearings, con...
Claims
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Application Information
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