Method for preparing aluminum bronze and steel bimetallic material

A bimetallic and aluminum bronze technology, which is applied in the field of preparation of aluminum bronze-steel bimetallic materials, can solve the problems of low interfacial bonding strength of bimetallic materials, difficult sintering of aluminum bronze powder into agglomerates, and poor wettability, etc., to achieve Low production cost, high yield, and improved sintering density

Inactive Publication Date: 2013-05-08
SHANGHAI UNIV OF ENG SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, due to the dense oxide film on the surface of the aluminum bronze powder, it is difficult to sinter the aluminum bronze powder into a block or the sintering density is low, the wettability between the aluminum bronze and the steel plate is poor, and the interface bonding strength of the sintered bimetallic material Lower, so this area has not been able to break through the above-mentioned technical problem of adopting powder metallurgy technology to prepare aluminum bronze-steel bimetallic material so far

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] a) Pickling the aluminum bronze powder: first put the aluminum bronze powder into the dilute hydrochloric acid aqueous solution with a mass percentage concentration of 3% and soak for 10 minutes, then repeatedly wash it with pure water until it is 1% nitric acid with a mass percentage concentration Until the silver solution cannot detect chloride ions;

[0030] b) adding silicon bronze powder with a silicon content of 1% to the aluminum bronze powder after the above treatment, the silicon bronze powder is added in an amount of 10%, and ball milled to make the mixture uniform;

[0031] c) Cut the steel plate with a thickness of 2.0mm into a specification of 500*100mm, then pickle it, wash it with clean water, and electroplate copper on its surface: the concentration of copper sulfate is 180g / L, and the concentration of sulfuric acid is 40g / L , the current density is 3A / dm 3 , the temperature is 20°C, the steel plate is used as the cathode, and the copper plate is used a...

Embodiment 2

[0037] a) Pickling the aluminum bronze powder: first put the aluminum bronze powder into a dilute hydrochloric acid aqueous solution with a mass percentage concentration of 5% and soak for 5 minutes, then repeatedly wash it with pure water until it is 1% nitric acid with a mass percentage concentration Until the silver solution cannot detect chloride ions;

[0038] b) adding silicon bronze powder with a silicon content of 2% to the aluminum bronze powder after the above treatment, the amount of silicon bronze powder added is 20%, and ball milling makes the mixture uniform;

[0039] c) Cut the steel plate with a thickness of 2.0mm into a specification of 500*100mm, then pickle it, wash it with clean water, and electroplate copper on its surface: the concentration of copper sulfate is 200g / L, and the concentration of sulfuric acid is 60g / L , the current density is 5A / dm 3 , the temperature is 20°C, the steel plate is used as the cathode, and the copper plate is used as the anod...

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Abstract

The invention discloses a method for preparing an aluminum bronze and steel bimetallic material, wherein the method comprises the following specific steps that: aluminum bronze powder is subjected to acid cleaning treatment; the silicon bronze powder with silicon content being 1-5% is added into the treated aluminum bronze powder, and the mixture is subjected to ball milling so as to be uniformlyblended; the above uniformly blended powder is tiled on an electro-coppering surface of a steel plate; the steel plate with tiled powder is subjected to primary sintering; then the steel plate is subjected to secondary sintering after cold rolling. The test shows that the relative density of aluminum bronze in the aluminum bronze and steel bimetallic material can reach 99.5%, and the interface bonding strength is more than 85 MPa; in addition, the method has the advantages of low equipment investment, higher rate of finished products, simplicity in operation and lower production cost and the like, thereby meeting the requirement of large-scale production; and the method has industrial application value.

Description

technical field [0001] The invention relates to a preparation method of an aluminum bronze-steel bimetallic material, in particular to a method for preparing an aluminum bronze-steel bimetallic material by powder metallurgy technology, and belongs to the technical field of material preparation. Background technique [0002] Sliding bearings are very important frictional and vulnerable parts in automobiles (especially engines), and form important friction pairs with engine crankshafts, piston pins, camshafts and certain shaft parts on the chassis of automobiles. The performance of sliding bearing materials affects or determines the life, reliability and some major economic and technical indicators of automobiles and engines to a certain extent. Therefore, with the continuous improvement of the performance of automobiles and engines, the development of sliding bearing materials is also quite rapid. [0003] As human society pays more and more attention to environmental protec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F7/04C25D3/38
Inventor 杨琪陈进添何光志周剑平
Owner SHANGHAI UNIV OF ENG SCI
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