Determination of The Optimum Surface Roughness of AISI D2 Cold Work Tool Steel for Industrial Boronizing Applications

Authors : Yasin Gürcan, Arzum Işıtan

Pages : 2094-2110

Doi:10.47495/okufbed.1639938

View : 86 | Download : 215

Publication Date : 2025-12-15

Article Type : Research Paper

Abstract :During the boronizing process, a very thin and extremely hard ceramic layer forms on the surface of the material. This procedure is commonly applied to components requiring high resistance to wear and corrosion. Although boronized parts acquire superior properties, a key challenge is the elevated temperatures used during the process, which can alter the final dimensions and surface roughness of the part. This issue is particularly critical for precision cutting tools such as punches, which require high dimensional accuracy and surface quality but often suffer from rapid wear due to their function. In this study, the surface roughness evolution of AISI D2 (1.2379, X153CrMoV12) cold work tool steel—widely used in precision mold parts—was investigated after boronizing. Specimens with different initial surface roughness values were boronized in a solid Ekabor® II medium at 900 °C and 950 °C for 6 and 8 hours. Final dimensions and surface conditions were prepared via wire erosion and fine turning before treatment. The results showed that samples with Ra < 1 µm experienced up to 143% increase in surface roughness, while some Ra > 2 µm samples exhibited reductions of up to 26%. Increased temperature and duration intensified these effects. The findings emphasize that the initial surface roughness plays a critical role in the post-boronizing surface morphology and must be carefully controlled in precision applications.
Keywords : Borlama, Takım çeliği, Yüzey pürüzlülüğü, Boyut toleransı

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