Evaluation of Tribological Characteristics on Cold Forging Die by Pin-On-Disk Test

Susumu Mishima, Akira Yoshida, Masahiro Fujii, Masanori Seki

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

Friction coefficient under high pressure, e.g., cold forging, was carried out by pin-on-disk test using N oil as lubricant with a viscosity of 94 sq mm/sec at 40°C and a density of 1.02 g/cc, which was applied by dropping into the concave part of the disk before testing. The coefficient of friction of a disk-type test specimen made of tool steel did not show any change with applied load, but in the case of a disk-type test specimen made of high-speed steel, the coefficient of friction decreased with applied load. The coefficient of friction was lower in the case of surface finishing with emery paper No. 800 than in that of surface finishing to a mirror-like level. The coefficient of friction decreased with a decrease of applied load, but the surface of cemented carbide finished by using emery paper No.240 to a slightly rough level did not show any reduction of the coefficient of friction even under low load conditions. The treatment of the entire surface of cemented carbide resulted in coefficient of friction larger than that observed on the untreated surface.

Original languageEnglish
Pages (from-to)83-93
Number of pages11
JournalJapanese Journal of Tribology
Volume48
Issue number1
Publication statusPublished - Jan 1 2003

    Fingerprint

ASJC Scopus subject areas

  • Mechanics of Materials
  • Mechanical Engineering
  • Surfaces, Coatings and Films
  • Materials Chemistry

Cite this