Measuring the effects of some laser parameters on the surface and near surface region of laser treated cast iron cylinder bore

Kornél Májlinger,J Péter Szabó

doi:10.3311/pp.me.2008-2.06

Kornél Májlinger, J Péter Szabó

Open Access

https://doi.org/10.3311/pp.me.2008-2.06

Copy DOI

Abstract

The environmental and polluting materials emission standards in Europe are going to be always stricter, so in order to keep up with them, one of the largest European automotive manufacturers performs a laser treatment on the cylinder bores of their combustion engines. In this article the laser treated layers of cast iron cylinder bores with lamellar graphite are investigated with a FISCHERSCOPE^\unhbox \voidb@x \hbox \textregistered HM2000 XY microhardness measurement system and with a FEI Nova Nanolab 600 SEM/FIB dual beam scanning electron microscope (SEM), equipped with focused Ga-ion beam source. Four samples treated by two different laser sources in three configurations were investigated.

Highlights

The automotive engine development is defined by three main factors: first of all there is the need to make the engines more cost effective, the second is that the environmental regulations are becoming stricter, and thirdly the fuel prices are becoming more expensive
The higher pressure forces the piston rings to the piston bore with higher pressure which results in higher tribological load and in higher wear rate for both components [1]
This results in higher oil consumption and higher exhaust, which causes higher emission of pollution materials, decreasing efficiency and decreased engine lifetime

Summary

Introduction

The automotive engine development is defined by three main factors: first of all there is the need to make the engines more cost effective, the second is that the environmental regulations are becoming stricter, and thirdly the fuel prices are becoming more expensive. This treatment is patented, the laser treated cast iron cylinder bore In this article the results of microhardness mesauremet and the Focused Ion Beam (FIB) study of four samples, treated with Nd-YAG laser and fiber laser sources in three different configurations, will be discussed.

Results

Conclusion