Evaluation of tribological characteristics on cold forging die by pin-on-disk test

Susumu Mishima, Akira Yoshida, Masahiro Fujii, Masanori Seki

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Abstract

Investigation on friction coefficient under high pressure such as cold forging was carried out by pin-on-disk test. Pin specimens were made of chromium-molybdenum steel SCM415 as work material and disk specimens were made of four kinds of high speed tools steels and cemented carbide as die materials. Nominal stresses of 1000 to 167N/mm2 were loaded on the sliding surface of pin. The surface of the disk specimens was finished by #240, #800 emery papers or lapping. Friction coefficient of #800 polished disk showed lower value than that of mirror finished one. PVD treatments had good effect of low seizure properties. Especially, DLC treatment was free from seizure. The friction coefficient of P/M high speed tool steel H which contains appropriate dispersed carbide was lower than that of homogeneous microstructure AISI S7. This paper reports the friction coefficient relative to combination of materials, surface finish, surface treatment and load of specimens.

Original languageEnglish
Pages (from-to)135-142
Number of pages8
JournalToraibarojisuto/Journal of Japanese Society of Tribologists
Volume48
Issue number2
Publication statusPublished - Apr 28 2003

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ASJC Scopus subject areas

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

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