Manufacturing method of bimetal self-lubricating bearing material

Abstract

The invention relates to a manufacturing method of a bimetal self-lubricating bearing material, which comprises the following steps of: mixing powder, namely uniformly mixing a certain proportion of mixed pure metal powder of Cu, Sn and Pb and graphite powder in an amount which is 5 to 10 percent of the total mass of the mixed pure metal powder in a blender mixer; coating the mixed powder on a steel plate, a stainless steel plate or a bronze sheet and performing secondary sintering, namely performing instant liquid-phase sintering at the temperature higher than the melting point of the Sn powder and lower than the sintering temperature of a copper alloy, wherein limited connection is formed between the Cu powder, a solid solution is formed between the tin and the copper, the Pb powder is distributed between copper and tin solid solution crystal boundaries or dendritic crystal net cells in a form of single Pb particles, the primary positions of the Sn powder and Pb powder are vacant, and the graphite is distributed at the positions; performing the secondary sintering according to the sintering temperature of the copper alloy; and manufacturing the bimetal self-lubricating bearing material by precisely rolling and annealing. The product has stable and reliable performance and is widely applied to machinery industry, such as a hydraulic turbine guide vane bearing, a hydraulic metal structure and metallurgical equipment.

Description

technical field [0001] The invention relates to bearing materials, in particular to a method for manufacturing bimetallic self-lubricating bearing materials. Background technique [0002] The bimetallic self-lubricating bearing material is a self-lubricating bimetallic sliding bearing material based on low-carbon cold-rolled steel plate, stainless steel plate or copper plate, with sintered bronze powder as the friction surface layer, and the solid lubricant is evenly distributed on the bronze powder layer. The working mechanism of this bearing material is: the copper alloy on the surface begins to wear during the initial movement of the bearing, and the solid lubricant is also released from the copper alloy layer, and due to the influence on the surface roughness of the grinding pair, it is mechanically combined on the grinding pair. On the surface, a solid lubricating film is formed. In the further relative movement, the solid lubricant will continuously transfer to the fr...

AI Technical Summary

Problems solved by technology

Low graphite content will result in high friction coefficient and low allowable sliding speed. At the same time, due to the blocking effect of graphite on sintering, the connection between copper alloy powders will become weak, which will affect the bonding fastness, low bearing capacity and poor wear resistance.

[0006] like figure 1 The structure of the bimetallic self-lubricating material produced by the prior art shown shows that the existing sintering method is a unit system sintering, that is, the sintering of a single component powder, which is characterized in that only copper alloy copper occurs during the sintering process. The metallurgical bond between alloy particles (also the bond between copper alloy particles and steel or copper matrix), without changes in chemical composition and metallographic structure

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