The influence of amperage of electric arc on microhardness in the area single and overlapping remeltings of HS 6-5-2 steel

• Autorzy: Dziedzic A.
• Języki publikacji: EN

Abstrakty

EN

The present thesis depicts the microhardness of HV0,065 surface layer of high speed steel HS6-5-2 remelted with the electric arc. There were different surface layer variants of remelting used - the amperage was changed from 50 to 120A with the stable scanning speed of 300mm/min. There was also the influence of overlapping of the remeltings on the microhardness result. The highest average microhardness of the surface layer of high speed steel HS6-5-2 amounting 1100 HV0,065 was achieved by using the amperage of electric arc of 50 A. The overlapping of remeltings is connected with the possibility of occurence of the microhardness decrease in the area of overlapping of the heat influence zone of second remelting (another remelting) on the first remelting (the previous one).

Słowa kluczowe

EN

heat treatment; mechanical features; metallography; high-speed steel; remelting; microhardness; overlapping remeltings

PL

obróbka cieplna; metalografia; stal szybkotnąca; przetapianie; mikrotwardość

• Wydawca: Komisja Odlewnictwa Polskiej Akademii Nauk Oddział w Katowicach
• Czasopismo: Archives of Foundry Engineering
• Rocznik: 2011
• Tom: Vol. 11, iss. 3
• Strony: 35--38
• Opis fizyczny: Bibliogr. 7 poz., rys., tab., wykr.

Twórcy

autor

Dziedzic A.

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

Bibliografia

• [1] A. W. Orłowicz, A. Trytek, Effect of rapid solidification on sliding wear of iron castings, Wear 9258, 2002.
• [2] Z. Nitkiewicz, J. Iwaszko, The use of arc plasma in surface engineering. Material engineering, 6, 373-375, 2000, (in Po-lish).
• [3] W. Orłowicz, M, Mróz, A. Trytek, Heating efficiency in the GTAW process. Acta Metallurgica Slovaca, No 2, 539-543, 1999.
• [4] L. Dobrzański, E. Hajduczek, L. Nowosielski, Physical metallurgy and heat treatment of tool materials, WNT, War-saw 1990 (in Polish).
• [5] A. Dziedzic, The microstructure of HS 6-5-2 steel in the areas overlapping remelting obtained by the use of GTAW method, Archives of foundry engineering, Vol. 8, Issue 3, Katowice-Gliwice 2008, s. 47-52.
• [6] A. Dziedzic, The influence of tempering on the microstructure and microhardeness of HS 6-5-2 steel in the area of overlapping remelting obtained with the use of the GTAW method, Archives of foundry engineering, Vol. 10, Issue 1, Katowice-Gliwice 2010, s. 335-338.
• [7] K. Osetek, Effect of plasma current arc on microhardness of HS6-5-2 steel, MA thesis supervised by the A. Dziedzic, Rzeszow 2010 (in Polish).