A study on the tribological behavior of camshaft by CrN+WC/C coating

Joon Ho Seo, Dae-Soon Lim, Jin Yong Kim, Hyun Chul Kim, Byung Chul Na

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

The contact in the valve train system is known to be the part subject to significant load in an automobile engine. For such reason, the wear of the contact accounts for the greatest portion of entire friction loss of an engine, leading to the occurrence of abnormal wear. Recently, with the increase in the fuel economy of an engine as well as the durability increase becoming the critical goals to engine developers, many studies are being performed on the reduction of wear in the valve train system. In order to reduce the wear in the valve train, this study first formed a CrN layer to increase the bonding force with the base metal using the PVD-sputtering coating method and then applied a 2-layer coating that formed the WC/C layer with low friction/wear resistance characteristics. In addition, it examined the friction characteristics occurring between the cam and the tappet by using the dedicated wear tester and found that the friction torque value was reduced approximately 60-70% in the high load condition through comparison testing with the existing part when the CrN +WC/C coating was applied. And vibration was reduced by 50%. So application of the CrN +WC/C coating to actual vehicles will reduce the fuel economy and occurrence of noise-vibration.

Original languageEnglish
Pages (from-to)334-340
Number of pages7
JournalMaterials and Manufacturing Processes
Volume25
Issue number5
DOIs
Publication statusPublished - 2010 May 1

Fingerprint

Camshafts
Wear of materials
Coatings
Friction
Fuel economy
Engines
Automobile engines
Cams
Physical vapor deposition
Wear resistance
Sputtering
Durability
Torque
Metals
Testing

Keywords

  • Cam
  • Friction
  • Friction torque
  • Tappet

ASJC Scopus subject areas

  • Mechanical Engineering
  • Mechanics of Materials
  • Industrial and Manufacturing Engineering
  • Materials Science(all)

Cite this

A study on the tribological behavior of camshaft by CrN+WC/C coating. / Seo, Joon Ho; Lim, Dae-Soon; Kim, Jin Yong; Kim, Hyun Chul; Na, Byung Chul.

In: Materials and Manufacturing Processes, Vol. 25, No. 5, 01.05.2010, p. 334-340.

Research output: Contribution to journalArticle

Seo, Joon Ho ; Lim, Dae-Soon ; Kim, Jin Yong ; Kim, Hyun Chul ; Na, Byung Chul. / A study on the tribological behavior of camshaft by CrN+WC/C coating. In: Materials and Manufacturing Processes. 2010 ; Vol. 25, No. 5. pp. 334-340.
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