The Characterization Of Cast Fe-Cr-C Alloy

Archives of Metallurgy and Materials

M. Stępień¹  G. Cios¹  P. Bała²  T. Kozieł²  K. Wieczerzak² 

[1] AGH UNIVERSITY OF SCIENCE AND TECHNOLOGY, ACADEMIC CENTRE FOR MATERIALS AND NANOTECHNOLOGY, AL. A. MICKIEWICZA 30, 30-059 KRAKÓW, POLAND;AGH UNIVERSITY OF SCIENCE AND TECHNOLOGY, FACULTY OF METALS ENGINEERING AND INDUSTRIAL COMPUTER SCIENCE, AL. A. MICKIEWICZA 30, 30-059 KRAKÓW, POLAND

关键词: Keywords: Fe-Cr-C alloy;    chromium carbides;    cast alloy;    segregation;   

DOI  :  10.1515/amm-2015-0206

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

The paper presents the results of the characterization of alloy from Fe-Cr-C (carbon content 0.79 wt.%) system including the microstructure, phase analysis, morphology and hardness in as cast state. The chemical composition was designed to create chromium-rich ferritic matrix with high volume fraction of carbides in form of interdendritic eutectics. The research was carried out on the cross section of the ingot, synthesized in an arc furnace under high purity argon atmosphere and crystallized on water-cooled copper mould. Microstructural characterization was carried out by light microscopy and scanning electron microscopy (SEM). Phase identification was performed by X-Ray diffraction (XRD). The microstructure of the investigated alloy is composed of primary and secondary dendrites Fe-Cr solid solution and complex M23C6 and M7C3 carbides in interdendritic areas. Segregation of Cr and C during crystallization causes precipitation of M7C3 carbides. The average hardness of the alloy is 205±12 HV10.

【 授权许可】

Unknown