Alloy coating bushing

Abstract

The invention discloses an alloy coating bushing which comprises a steel backing layer, a substrate layer, a nickel grid layer and a friction-reducing layer which are sequentially arranged. The friction-reducing layer is made from a lead-tin-copper-indium alumina alloy which is prepared from the following elements in percentage by weight: 4-18 percent of tin, 0.7-5 percent of copper, 2-20 percent of indium, 0.5-1.5 percent of alumina and the balance of lead. The alloy coated bushing has the advantages of high bearing capability, abrasion and interlacement resistance, good embedment and corrosion resistance, low lead content, environmental protection and the like.

Description

technical field [0001] The invention relates to the technology of sliding bearings of internal combustion engines, in particular to the improvement technology of bearing pads of high-load sliding bearings, and in particular to a new alloy-plated bearing pad. [0002] Background technique [0003] The bearing pad is one of the most critical parts of the engine, and the performance of the bearing pad directly affects the performance of the engine. With the development of internal combustion engines in the direction of high speed, high load and environmental protection, the requirements for the performance of bearing pads are constantly increasing: bearing pads must not only have high load carrying capacity and fatigue resistance, but also have good wear resistance and corrosion resistance. [0004] Traditional copper alloy bearing bushes are currently widely used in high-load internal combustion engines. In terms of structure, they are composed of a steel back layer, a coppe...

AI Technical Summary

Problems solved by technology

This kind of bearing bush can meet the basic requirements of the engine to a certain extent, but due to the low fatigue strength of the anti-friction layer, it cannot meet the development needs of the automotive internal combustion engine with a strengthened internal combustion engine

In addition, the corrosion resistance and wear resistance of bearing pads also need to be improved urgently. At present, there is no alloy-coated bearing pad that can meet the above requirements in the market.

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