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Enhancement of the punch pin durability induced by the PVD coating in production process of the automotive inner pipe

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Abstract

This experimental studies were carried out in order to understand the effects of the PVD coating and the UNSM treatment of HSS55 (high speed steel 55) during the production of the automotive inner pipe by the plastic deformation of S45C. The field test and the SEM images revealed that the PVD coating is necessary in spite of the high compressive residual stresses which were formed at the head of a punch pin. Upon the application of the AlCrN coating with the UNSM treatment the productivity and reliability of a punch pin had improved more than about 2.6 times compared to that of the TiN coating without the UNSM treatment. It is likely that the improvement is caused by the decreased stress concentration factor by the ‘wrapped in oxides’ inside of an abrasion pit. The abrasion pits were mostly generated within range of 5% ∼ 50% of the diameter ratio from the end of a pin and reached the maximum value about 17% from the end of a pin.

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Authors and Affiliations

  1. School of Mechanical Engineering, Kyungpook National University, 1370, Sankyuk-dong, Buk-gu, Daegu, 702-701, Korea

    Chang-Min Suh

  2. School of Mechanical and Automotive Engineering, Kyungpook National University, 386, Gajang-dong, Sangju, Gyung-buk, 742-711, Korea

    Sang-Yeob Oh

  3. Department of Mechanical Engineering, SunMoon University / DM Technical Research Center, Designmecha Co., Asan, Korea

    Young-Sik Pyun

Authors
  1. Chang-Min Suh
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  2. Sang-Yeob Oh
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  3. Young-Sik Pyun
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Correspondence to Chang-Min Suh.

Additional information

This paper was recommended for publication in revised form by Associate Editor In-Ha Sung

Chang-Min Suh received a B.S. and M.S. degree in Mechanical Engineering from Pusan National University. He received his Ph.D. degree from University of Tokyo, Japan in 1981. Dr. Suh is currently a Professor at the School of Mechanical Engineering at Kyungpook National University. From 1984 to 1985 he was a Visiting Professor in University of CA, Berkeley. He was the Head of Technology Innovation Center from 1995 until 2003, the Chairman of The 3rd International Conference on Advanced Materials Development and Performance in 2002, and the Editor and Co-Editor of International Journal of Modern Physics B of Vol. 17 and 20, World Scientific Publishing Co. Pte. Ltd., in April 2003 and October 2006, respectively. He has been a member of the National Academy of Engineering of Korea from 2003 until now. His research interests are Fatigue and Fracture Behavior of materials (Ceramic Coating).

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Suh, CM., Oh, SY. & Pyun, YS. Enhancement of the punch pin durability induced by the PVD coating in production process of the automotive inner pipe. J Mech Sci Technol 24, 1061–1066 (2010). https://doi.org/10.1007/s12206-010-0314-7

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  • DOI: https://doi.org/10.1007/s12206-010-0314-7

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