The microstructure of HS 6-5-2 steel in the areas overlapping remelting obtained by the use of GTAW method

• Autorzy: Dziedzic A.
• Języki publikacji: EN

Abstrakty

EN

The work presents microstructures of HS 6-5-2 high-speed steel from the areas overlapping remelting. The surface layer of the steel was remelted using the GTAW method. The microstructure photos were taken with LM and SEM microscopes. On microstructure photos there are visible results of heat effect overlapping remelting. The conclusions of the work show that as a result of crystallization in the zone of first remelting a system of crystals is formed which is forced the direction of heat removal from the front of the crystallization through the solid phase. With overlapping the second remelting on the first one, as a result of retreating crystallization on the border of the second and the first remelting the direction of crystals packing changes. Additionally, the heat influence zone of the second remelting changes the structure of the first remelting significantly. Aforementioned factors determine the decrease of the microhardness value of the surface layer within the areas overlapping remelting.

Słowa kluczowe

EN

heat treatment; metallography; GTAW method; directional crystallization; cells; dendritic cells

PL

obróbka cieplna; metalografia; metoda GTAW; krystalizacja kierunkowa

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2008
• Tom: Vol. 8, iss. 3
• Strony: 47--52
• Opis fizyczny: Bibliogr. 5 poz., rys.

Twórcy

autor

Dziedzic A.

• Institute of Technics, Rzeszow University, 35-310 Rzeszów, Rejtana 16a, Poland,

Bibliografia

• [1] A. Dziedzic, The effect of influence of overlapping laser tracks on the structure and microhardness HS 6-5-2 steel, Archives of foundry, Vol. 6, Nr 18, Katowice-Gliwice 2006 (in Polish).
• [2] A. Dziedzic, The abrasion resistance of HS 6-5-2 high-speed steel with overlapping laser remelting, Archives of foundry, Vol. 6, Nr 19, Katowice-Gliwice 2006 (in Polish).
• [3] A. Dziedzic, Microstructure of remelted zone of HS 6-5-2 high speed steel, Archives of foundry engineering, Vol. 7, Issue 3, Katowice-Gliwice 2007.
• [4] A. Bylica, A. Dziedzic, Microhardness changes of surface layer of HS 6-5-2 steel in the areas overlapping remelting obtained with the use of GTAW method, A paper is intended to be published in Archives of foundry engineering, Vol. 8, Katowice-Gliwice 2008.
• [5] E. Fraś, Crystallization of metals, WNT, Warsaw, 2003 (in Polish).