hrvatski

Primjena niskotemperaturnog aluminiziranja kod čelika za topli rad

During die-casting of aluminium components, tool parts are exposed to a complex combination of different wear mechanisms, such as thermal fatigue, erosion and reactive soldering of the die surfaces. As a result, this causes damage and severely reduces the durability of tools, thus increasing tools maintenance costs. For increased resistance to reaction soldering, different methods of thermo-chemical surface modification techniques (such as nitriding or vanadising) or different processes of coatings may be applied. In this paper, the possibility of using low-temperature, low-potential aluminizing with subsequent oxidation of aluminized hot work tool steel surface has been explored. In this case, formation of stable and compact aluminium oixide (Al2O3) layer is what prevents direct contact of molten metal with the base die alloy, making it resistant (to some extent) to reaction soldering.

aluminiziranje; reaktivno nataljenje; erosija; tlačni lijev

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