Original scientific paper

https://doi.org/10.21278/TOF.42305

Enhancement of Wear Resistance of D-3 Piercing Punches by Applying Cryogenic Treatment: Field and Laboratory Investigations

Karuppan Subramani Sekar orcid.org/0000-0002-7006-286X ; Murugappa Polytechnic College, S.M.Nagar, Chennai, Tamilnadu, India
Suruli Nagarajan Murugesan ; Rajalakshmi Engineering College, Thandalam, Chennai, Tamilnadu, India

Abstract

Due to excessive shearing and load, punches wear faster than dies in press tools used for cutting operations. The shape and size of components produced by worn punches pose challenges; hence efforts are being taken by industries to extend the punch life and to reduce the cost and time of replacement of punches. The paper reports on an attempt made to investigate effects of cryogenic treatment and tempering cycles on wear life enhancement of D-3 tool steel specimens and punches. Four differently treated groups of D-3 piercing punches and pins were tested in the manufacture of AISI 1055 medium carbon steel chain parts and pin-on-disk wear tests were carried out. The punch wear was assessed by capturing images of the punch tips using a machine vision system after manufacturing several chain components and the image processing technique was used in assessing the wear. Scanning electron microscopy (SEM) and optical microscopy (OM) images of the D-3 specimens were also taken to study effects of the cryogenic treatment. The results show improved wear resistance of the cryogenically treated punches compared to the conventionally heat-treated punches.

Keywords

cryogenic treatment; piercing; punch wear; image processing; machine vision

Hrčak ID:

206945

URI

https://hrcak.srce.hr/206945

Publication date:

19.10.2018.

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