The quantification of galling in forming operations of hot dip galvanized sheet metal under laboratory conditions

Jochen Giedenbacher, Anna-Elisabeth Raab, Christian Walch, Aziz Huskic

Research output: Chapter in Book/Report/Conference proceedingsConference contributionpeer-review

1 Citation (Scopus)

Abstract

In the sheet metal forming industry, tools are subject to mechanical, thermal, chemical and tribological loads. One of the major problems in forming operations of hot-dip galvanized sheet metal is galling (build-up of zinc flakes on the tool). This phenomenon develops gradually as an adhesion on the tool surface. The adhesive wear leads to high rejection and reworking costs for large car body forming tools. Due to economic aspects and the easy castability, the forming tools are made of cast iron. These materials tend to high adhesive wear. The aim of this project is to find a three-dimensional surface parameter, which describes a tribologically advantageous surface of forming tools in order to reduce galling. An additional objective is to optimize tool materials, heat treatment and surface coating. The evaluation of galling under laboratory conditions is based on strip drawing tests. The characterization of tool materials was executed for grey cast iron (EN-GJL-200/250) and nodular cast iron (EN-GJS-700). Investigations demonstrate that the processing methods and test parameters like sliding speed and temperature have a significant influence ongalling. Three-dimensional surface parameters have also shown an effect on galling.

Original languageEnglish
Title of host publicationTHERMEC 2016
EditorsChristof Sommitsch, Mihail Ionescu, Brajendra Mishra, Brajendra Mishra, Ernst Kozeschnik, T. Chandra
PublisherTrans Tech Publications Ltd
Pages607-612
Number of pages6
ISBN (Print)9783035711295
DOIs
Publication statusPublished - 2017
Event9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016 - Graz, Austria
Duration: 29 May 20163 Jun 2016

Publication series

NameMaterials Science Forum
Volume879
ISSN (Print)0255-5476
ISSN (Electronic)1662-9752

Conference

Conference9th International Conference on Processing and Manufacturing of Advanced Materials, THERMEC 2016
CountryAustria
CityGraz
Period29.05.201603.06.2016

Keywords

  • Forming tools
  • Galling
  • Galvanized sheet metal
  • Grey cast iron
  • Nodular cast iron
  • Strip drawing test
  • Surface quality
  • Surface roughness

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