Test method for bonding fastness of bearing shell sprayed antifriction layer

Abstract

The invention discloses a test method for the bonding fastness of a bearing shell sprayed antifriction layer. The method includes the steps of: S1, selecting 3 undamaged bearing shells randomly, and removing oil stains from the surfaces of the sprayed bearing shells; S2, fixing a first bearing shell, using a knife to cut out two sets of parallel lines on the sprayed antifriction layer, wherein the two sets of parallel lines cross with each other to form a number of rhombus regions; S3, pasting a test adhesive tape to grids formed by the cut lines, and then using a smooth round rubber rod to roll the test adhesive tape; S4, tearing off the test adhesive tape with force, observing the surface state of the sprayed antifriction layer at the pasting part, and then evaluating the bonding fastness of the sprayed antifriction layer and the bearing shell; and S5, repeating the step 2, 3 and 4, conducting bonding fastness test on the second bearing shell and the third bearing shell in order, integrating the three evaluation results, and rating the bonding fastness of the sample's bearing shell sprayed antifriction layer. The method provided by the invention is simple in operation and suitable for conventional laboratories, and also the whole test operation is scientific and standard, and the test result evaluation is accurate.

Description

technical field [0001] The invention relates to the technical field of bearing pad testing, in particular to a method for testing the bonding fastness of a sprayed anti-friction layer on a bearing pad. Background technique [0002] The bearing shell is the contact part of the sliding bearing and the journal. It is shaped as a tile-like semi-cylindrical surface and is very smooth. It is generally made of wear-resistant materials such as bronze and anti-friction alloy. In special cases, it can be made of wood, Made of engineering plastic or rubber. At present, advanced engine technology has higher and higher requirements on bearing bushes; more frequent starting, start-stop or hybrid engines will lead to early wear of bearing bushes. The increase in engine burst pressure and the lightweight of the engine increase the load on the bearing pad. Low-viscosity oils, roughened crankshaft surfaces, and higher temperatures aggravate early bearing pad wear. Bearing shells with tradi...

AI Technical Summary

Problems solved by technology

Bearing shells with traditional structures no longer meet the development requirements of internal combustion engine technology

[0003] At present, in the prior art, early wear is prevented by spraying anti-friction layer on the bearing pad, but the bonding fastness between the sprayed anti-friction layer and the bearing pad is one of the important indicators to measure the quality of the sprayed anti-friction layer; However, there is no scientific and standardized test method for the adhesion fastness of the anti-friction coating sprayed on the bearing pad at present.