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Unconventional Structure of X210Cr12 Steel Obtained by Thixoforming

JIRKOVÁ, H., AIŠMAN, D., MAŠEK, B. Unconventional Structure of X210Cr12 Steel Obtained by Thixoforming. Journal of Alloys and Compounds, 2010, roč. 1, č. 504, s. 500-503. ISSN: 0925-8388
Jazyk publikace: eng
Anglický název: Unconventional Structure of X210Cr12 Steel Obtained by Thixoforming
Rok vydání: 2010
Místo konání: Amsterdam
Název zdroje: Elsevier
Autoři: Dr. Ing. Hana Jirková , Ing. David Aišman , Prof. Dr. Ing. Bohuslav Mašek
Abstrakt EN: Innovative technological processes allow reaching unconventional structures with specific mechanical properties even when using conventional materials. One of many possibilities is the treatment of metal alloys in the semi-solid state. In this experiment the thixoforming technology was examined by processing the X210Cr12 steel with rapid solidification of the liquid phase. The applied steel is leduburitic in its basic state and after conventional heat treatment it is usually used in the state of tempered martensite. During the treatment in the region between the solid and liquid state with rapid cooling a structure formed from 96% of globular austenitic formations with the rest consisting of carbide network is obtained from the initial structure of primary and secondary carbides distributed in a ferrite matrix. The aim of this experiment was to describe the achieved structure and, at the same time, confirm its stability under various conditions of the subsequent heat treatment and also determine its behaviour during mechanical loading. Obtained structures were analysed via light and laser confocal microscopy. The volume fractions of individual phases were determined by means of x-ray diffraction analysis. The hardness of individual components varies from 320 to 400 HV0.05 for austenite formations and approx. 550 HV0.05 for carbides network.
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