Effect of contact pressure applied on tool surface during cold forging on fatigue life of tool steel

Nuwan Karunathilaka, Naoya Tada, Takeshi Uemori, Ryota Hanamitsu, Masahiro Kawano

Research output: Contribution to journalConference article

Abstract

The effect of contact pressure applied on tool surface during cold forging on fatigue life was investigated. Three different contact pressures were applied on heat treated SKH51 specimen surfaces by a forging setup using a universal testing machine. This was followed by tensile test and axial fatigue test for forged and unforged specimens. Dimension, surface hardness and residual stress of the specimen showed a positive relationship with contact pressure while surface roughness did not show a significant difference. The tensile strength and fatigue life showed an increase at lower and medium contact pressures while in high contact pressure both parameters showed a decrease.

Original languageEnglish
Pages (from-to)488-495
Number of pages8
JournalProcedia Manufacturing
Volume15
DOIs
Publication statusPublished - Jan 1 2018
Event17th International Conference on Metal Forming, METAL FORMING 2018 - Toyohashi, Japan
Duration: Sep 16 2018Sep 19 2018

Fingerprint

Tool steel
Forging
Fatigue of materials
Residual stresses
Tensile strength
Surface roughness
Hardness
Testing

Keywords

  • Cold forging
  • Contact pressure
  • Fatigue life
  • Residual stress
  • Tensile strength
  • Tool steel

ASJC Scopus subject areas

  • Industrial and Manufacturing Engineering
  • Artificial Intelligence

Cite this

Effect of contact pressure applied on tool surface during cold forging on fatigue life of tool steel. / Karunathilaka, Nuwan; Tada, Naoya; Uemori, Takeshi; Hanamitsu, Ryota; Kawano, Masahiro.

In: Procedia Manufacturing, Vol. 15, 01.01.2018, p. 488-495.

Research output: Contribution to journalConference article

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AU - Kawano, Masahiro

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AB - The effect of contact pressure applied on tool surface during cold forging on fatigue life was investigated. Three different contact pressures were applied on heat treated SKH51 specimen surfaces by a forging setup using a universal testing machine. This was followed by tensile test and axial fatigue test for forged and unforged specimens. Dimension, surface hardness and residual stress of the specimen showed a positive relationship with contact pressure while surface roughness did not show a significant difference. The tensile strength and fatigue life showed an increase at lower and medium contact pressures while in high contact pressure both parameters showed a decrease.

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KW - Residual stress

KW - Tensile strength

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