Effect of leaser treatment on the surface of cast iron cylinder bores

Kornél Májlinger, P. Szabó

Research output: Contribution to journalArticle

Abstract

The environmental and pollution materials emission standards in Europe are going to be more strict. In order to meet the standards, a European automotive manufacturer performs a finishing laser treatment on the honed cast iron cylinder bores of their V-engine blocks. Samples of laser treated cast iron cylinder bores with lamellar graphite were investigated. Due to the growing popularity and high efficiency of fiber lasers, samples treated with Yb-fiber lasers were investigated. In order to evaluate the microstructure and grain size of the laser treated layer, scanning electron microscopic images were taken on cross sectioned samples with a scanning electron microscope/focused ion beam dual beam electron microscope. The samples were found to be ultra fine grained. Nanoindentation hardness measurements of the surface layer showed a clear linear trend between the laser power density in the applied range and the measured hardness. Additional micro hardness measurements suggest an annealed region beneath the surface.

Original languageEnglish
Pages (from-to)83-88
Number of pages6
JournalPeriodica Polytechnica, Mechanical Engineering
Volume54
Issue number2
DOIs
Publication statusPublished - 2010

Fingerprint

Engine cylinders
Cast iron
Lasers
Fiber lasers
Electron microscopes
Hardness
Scanning
Focused ion beams
Nanoindentation
Microhardness
Graphite
Pollution
Engines
Microstructure
Electrons

Keywords

  • Cast iron
  • Cylinder bore
  • Focused ion beam
  • Laser surface treatment
  • Nanoindentation

ASJC Scopus subject areas

  • Mechanical Engineering

Cite this

Effect of leaser treatment on the surface of cast iron cylinder bores. / Májlinger, Kornél; Szabó, P.

In: Periodica Polytechnica, Mechanical Engineering, Vol. 54, No. 2, 2010, p. 83-88.

Research output: Contribution to journalArticle

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