Diffusion of C and Cr During Creation of Surface Layer on Cast Steel Casting

Archives of Metallurgy and Materials

J. Szajnar¹  T. Wróbel¹  A. Dulska¹  J. Suchoń¹ 

[1] SILESIAN UNIVERSITY OF TECHNOLOGY, DEPARTMENT OF FOUNDRY, 7 TOWAROWA STR., 44-100 GLIWICE, POLAND

关键词: Keywords: microstructure;    microsegregation;    Cold Metal Transfer (CMT);    boiler pipes Inconel 625;   

DOI  :  10.2478/amm-2014-0186

学科分类：金属与冶金

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

【 摘 要 】

In paper a method of improvement in utility properties of unalloyed cast steel casting in result of diffusion of C and Cr in process of creation of surface layer is presented. The aim of paper was determination of diffusion range of basic elements of alloyed surface layer. Moreover a quantitative analysis of carbides phase strengthens alloyed surface layer of casting was carried out. The results of studies shown that important factors of surface layer creation are maximal temperature Tmax on granular insert – cast steel boundary dependent of pouring temperature, granularity Zw of Fe-Cr-C alloy insert and thickness of casting wall gśo. On the basis of obtained results was affirmed that with increase of thickness of casting wall increases range of diffusion in solid state in Fe-Cr-C grains and in liquid state. Moreover the range of Tmax = 13001500oC favours creation of the proper alloyed surface layers on cast steel.

【 授权许可】

Unknown