Duplex coating of AISI 316 and 420 die for hot mold stamping

Tatsuhiko Aizawa, Tatsuya Fukuda, Kuniyoshi Itoh

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

Prehardened AISI-316 and AISI-420 materials are proposed as a new mold-die material especially for hot mold-stamping of oxide glasses. First, high-density plasma nitriding is developed to preharden the initial AISI-316 and AISI-420 raw materials after cleaning and polishing. The hardness range from 600 HV to 800 Hv is attained by this plasma nitriding in relatively low temperature. In second, this prehardened substrates are further DLC-coated by using the RF-sputtering or unbalanced magnetron sputtering. The thickness of coating is kept to be nearly constant by 0.4 to 0.6 mm. In addition to hardness testing, tribological testing is also performed to prove that low frictional state by m = 0.1 to 0.15 should be attained by this duplex coating. In final, optical polymers and oxide glasses are employed to make mold-stamping test to demonstrate the high temperature strength of this duplex-coated mold die.

Original languageEnglish
Title of host publicationProceedings of the 14th International Conference on Metal Forming, METAL FORMING 2012
PublisherWiley-VCH Verlag
Pages1055-1058
Number of pages4
VolumeSPL. ISSUE
ISBN (Print)9783514007970
Publication statusPublished - 2012 Jan 1
Event14th International Conference on Metal Forming, METAL FORMING 2012 - Krakow, Poland
Duration: 2012 Sep 162012 Sep 19

Conference

Conference14th International Conference on Metal Forming, METAL FORMING 2012
CountryPoland
CityKrakow
Period12/9/1612/9/19

Keywords

  • AISI-316
  • AISI-420
  • DLC coating
  • Duplex coating
  • Hot mold stamping
  • Mold-dies
  • Plasma nitriding

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Physical and Theoretical Chemistry
  • Metals and Alloys
  • Materials Chemistry

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  • Cite this

    Aizawa, T., Fukuda, T., & Itoh, K. (2012). Duplex coating of AISI 316 and 420 die for hot mold stamping. In Proceedings of the 14th International Conference on Metal Forming, METAL FORMING 2012 (Vol. SPL. ISSUE, pp. 1055-1058). Wiley-VCH Verlag.