Chemical elements diffusion in the stainless steel components brazed with Cu-Ag alloy

International Conference on Innovative Research - ICIR Euroinvent 2016

Voiculescu, I.^1 ; Geanta, V.^1 ; Vasile, I.M.^1 ; Binchiciu, E.F.^2 ; Winestoock, R.^3

University Politehnica of Bucharest, Romania, 313, Splaiul Independentei, sector 6, Bucharest

060042, Romania^1

S.C. Sudotim As SRL, Bv. Mihai Viteazu, 30, Timisoara, Romania^2

Ben Gurion University of the Negev, Beer-Sheva, Israel^3

关键词: Chemical compositions;    Chemical-elements diffusion;    Diffusion phenomena;    Edx spectrometries;    Metallographic analysis;    Micro-structural characteristics;    Separation interface;    Stainless steel-304;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/133/1/012014/pdf
DOI  :  10.1088/1757-899X/133/1/012014

来源: IOP

【 摘 要 】

The paper presents the study of diffusion of chemical elements through a brazing joint, between two thin components (0.5mm) made of stainless steel 304. An experimental brazing filler material has been used for brazing stainless steel component and then the diffusion phenomenon has been studied, in terms of chemical element displacement from the brazed separation interface. The filler material is in the form of a metal rod coated with ceramic slurry mixture of minerals, containing precursors and metallic powders, which can contribute to the formation of deposit brazed. In determining the distance of diffusion of chemical elements, on both sides of the fusion line, were performed measurements of the chemical composition using electron microscopy SEM and EDX spectrometry. Metallographic analysis of cross sections was performed with the aim of highlight the microstructural characteristics of brazed joints, for estimate the wetting capacity, adherence of filler metal and highlight any imperfections. Analyzes performed showed the penetration of alloying elements from the solder (Ag, Cu, Zn and Sn) towards the base material (stainless steel), over distances up to 60 microns.