Original scientific paper

Thermal fatigue cracking of die-casting dies

M. Muhič ; TKC d.o.o., Ljubljana, Slovenia
J. Tušek ; Faculty of Mechanical Engineering, Ljubljana, Slovenia
F. Kosel ; Faculty of Mechanical Engineering, Ljubljana, Slovenia
D. Klobčar ; Faculty of Mechanical Engineering, Ljubljana, Slovenia
M. Pleterski ; Faculty of Mechanical Engineering, Ljubljana, Slovenia

Abstract

Die-casting dies are exposed to high thermal and mechanical loads. Thermal fatigue cracking of dies due to thermal cycling may importantly shorten the life-time of the die. Cracks degrade the surface quality of dies and consequently the surface of castings. In this study, thermal fatigue cracking of dies was analyzed during the process of die casting aluminium alloys. During the process cracks were observed and measured and their location and size were determined. Thermal and mechanical loads cause high local stresses and consequently surface cracks. First cracks occur as early as after 2000 cycles and propagate progressively with cycles.

Keywords

die casting; die defect; thermal fatigue; surface cracks

Hrčak ID:

40242

URI

https://hrcak.srce.hr/40242

Publication date:

1.1.2010.

Article data in other languages: croatian

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