The surface layer of 20H steel after fluid-laser treatment.

• Autorzy: Jasiński, J. , Zyska, A. , Jeziorski, J. , Pisarek, J.
• Konferencja: AMT'98 XVth Physical Metallurgy and Materials Science Conference 'Advanced Materials & Technologies', 17-21 May, 1998, Kraków-Krynica, Poland
• Języki publikacji: EN

Abstrakty

EN

The paper presents results of fluid-bed diffusion enrichment of the 20H steel surface layer with interstitial atoms of C and N followed by subsequent laser hardening. The influence of various power densities of laser radiation on the structure and hardness of hardened layers has been determined. It has been proved that for low densities of laser power the decaying of the fusion and transition zones takes place. Hardened layers have fine acicular structure of martensite with carbide precipitations along the former austenite grain boundaries. The transition zone with its martensitic-ferritic structure can be easily distinguished from the ferritic-pearlitic matrix. Distribution of hardness along the symmetry axes of the cross-sections of hardened layers and along the lines perpendicular to the direction of laser radiation has been specified.

Słowa kluczowe

PL

warstwa wierzchnia; warstwa utwardzona; obróbka laserowa; złoże fluidalne; dyfuzja; utwardzanie laserowe; gęstość mocy; twardość; mikrostruktura

EN

surface layer; hardened layer; laser treatment; fluid bed; diffusion; laser hardening; power density; hardness; microstructure

• Czasopismo: Inżynieria Materiałowa
• Rocznik: 1998
• Tom: R. XIX, nr 4
• Strony: 1262-1267
• Opis fizyczny: Bibliogr.5 poz., tab., rys.

Twórcy

autor

Jasiński, J.

• Technical University of Częstochowa Częstochowa, Poland

autor

Zyska, A.

• Technical University of Częstochowa Częstochowa, Poland

autor

Jeziorski, J.

• Technical University of Częstochowa Częstochowa, Poland

autor

Pisarek, J.

• Technical University of Częstochowa Częstochowa, Poland

• Technical University of Częstochowa

Bibliografia

• [1] Kusiński J.: Obróbka laserowa średniowęglowych stali chromowych, Termoobróbka Hutnicza’87, s.269, Gliwice 1987.
• [2] Burakowski T.: Inżynieria powierzchni metali, WPW, Warszawa 1992, s.224-239.
• [3] Cruciani D., Cantello M., Lavona G., Ramous E., Tiziani A. Laser Surface treatment whit different absorbation coatings. Raport No. C3-1. XI Congreso International de Electrotermia, Malaga 1988.
• [4] Jasiński J., Jeziorski L., Kubara M. : Carbonitriding of steel in fluidised beds, Heat Treatment of Metals, 41, 1985.2.
• [5] Zyska A.: Struktura warstwy wierzchniej stali 20H po obróbce fluidalno-laserowej, PD 1995