Preliminary communication

Problems in repair-welding of duplex-treated tool steels

T. Muhič ; TKC d.o.o., Ljubljana, Slovenia
J. Tušek ; Faculty of Mechanical Engineering, Ljubljana, Slovenia
M. Pleterski ; Faculty of Mechanical Engineering, Ljubljana, Slovenia
D. Bombač ; Faculty of Natural Sciences and Engineering, Ljubljana, Slovenia

Abstract

The present paper addresses problems in laser welding of die-cast tools used for aluminum pressure die-castings and plastic moulds. To extend life cycle of tools various surface improvements are used. These surface improvements significantly reduce weldability of the material. This paper presents development of defects in repair welding of duplex-treated tool steel. The procedure is aimed at reduction of defects by the newly developed repair laser welding techniques. Effects of different repair welding process parameters and techniques are considered. A microstructural analysis is conducted to detect defect formation and reveal the best laser welding method for duplex-treated tools.

Keywords

repair welding; nitrided tool steel; PVD coating; die casting

Hrčak ID:

28859

URI

https://hrcak.srce.hr/28859

Publication date:

1.1.2009.

Article data in other languages: croatian

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