Effect of Single and Duplex Thin Hard Film Coatings on the Wear Resistance of 1.2343 Tool Steel

In aluminum extrusion process, tool steels used as die materials suffer from mechanical, thermal and tribological stresses causing plastic deformation, wear and heat checking during hot metal flow. Thin hard film coatings like TiN, (Ti,Al)N and CrN are preferred in order to improve the surface prope...

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Bibliographic Details
Published inTransactions of the Indian Institute of Metals Vol. 71; no. 2; pp. 411 - 419
Main Authors Çelik, Gülşah Aktaş, Polat, Şeyda, Atapek, Ş. Hakan
Format Journal Article
LanguageEnglish
Published New Delhi Springer India 01.02.2018
Springer Nature B.V
Subjects
Aluminum
Aluminum extrusion
Chemistry and Materials Science
Coating effects
Coefficient of friction
Corrosion and Coatings
Deformation effects
Deformation mechanisms
Deformation wear
Duplex stainless steels
Extrusion dies
Friction reduction
High temperature
Hot wear
Materials Science
Metallic Materials
Plastic deformation
Protective coatings
Surface properties
Technical Paper
Thermal fatigue
Thin films
Titanium
Tool steels
Tool wear
Tribology
Wear rate
Wear resistance
Wear tests
Characterization
Hot work tool steel
Wear
Surface treatment
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Summary:In aluminum extrusion process, tool steels used as die materials suffer from mechanical, thermal and tribological stresses causing plastic deformation, wear and heat checking during hot metal flow. Thin hard film coatings like TiN, (Ti,Al)N and CrN are preferred in order to improve the surface properties of the tools. These coatings can reduce the friction force, minimize the adhesive interaction between the die and billet pairs and decrease the plastic deformation of the tool. In this study, effect of single (CrN and AlTiN) and duplex (CrN + AlTiN) thin hard films on the hot wear behavior of DIN 1.2343 tool steel was investigated. Wear tests were performed both at room temperature and elevated temperature to simulate the conditions of aluminum extrusion process. Based on the evaluation of coefficient of friction values, specific wear rates and worn surface examinations, the duplex coating, which had the best performance in the RT wear test showed good resistance to high temperature wear under the simulated aluminum extrusion conditions.
ISSN:0972-2815
0975-1645
DOI:10.1007/s12666-017-1171-1