TY - JOUR
T1 - Determination of boron diffusion coefficients in borided tool steels
AU - Campos-Silva, I.
AU - Ortiz-Domínguez, M.
AU - López-Perrusquia, N.
AU - Escobar-Galindo, R.
AU - Gómez-Vargas, O. A.
AU - Hernández-Sánchez, E.
PY - 2009
Y1 - 2009
N2 - The boron diffusion in the Fe2B and FeB borided phases formed at the surface of AISI H13 tool steels during the paste boriding process was estimated. The treatment was carried out at temperatures of 1173, 1223 and 1273 K with 2, 4, 6 and 8 h exposure times for each temperature using a 4 mm layer thickness of boron carbide paste over the material surface. The boride layers were characterized by the GDOES technique to determine in quantitative form the presence of the alloying elements on the borided phases. The boron diffusion coefficients DFe2B and DFeB were determined by the mass balance equation and the boride incubation time assuming that the boride layers obey the parabolic growth law. Also, the mass gain produced by both boride layers at the surface of the tool steels was determined. Finally, the boron diffusion coefficients were interpreted as a function of the treatment temperature, obtaining the activation energy values for the diffusion controlled growth of Fe2B and FeB hard coatings.
AB - The boron diffusion in the Fe2B and FeB borided phases formed at the surface of AISI H13 tool steels during the paste boriding process was estimated. The treatment was carried out at temperatures of 1173, 1223 and 1273 K with 2, 4, 6 and 8 h exposure times for each temperature using a 4 mm layer thickness of boron carbide paste over the material surface. The boride layers were characterized by the GDOES technique to determine in quantitative form the presence of the alloying elements on the borided phases. The boron diffusion coefficients DFe2B and DFeB were determined by the mass balance equation and the boride incubation time assuming that the boride layers obey the parabolic growth law. Also, the mass gain produced by both boride layers at the surface of the tool steels was determined. Finally, the boron diffusion coefficients were interpreted as a function of the treatment temperature, obtaining the activation energy values for the diffusion controlled growth of Fe2B and FeB hard coatings.
KW - Boride incubation time
KW - Boride layers
KW - Diffusion coefficients
KW - Growth kinetics
KW - Mass balance equation
KW - Paste boriding process
UR - http://www.scopus.com/inward/record.url?scp=62149119904&partnerID=8YFLogxK
U2 - 10.4028/www.scientific.net/DDF.283-286.681
DO - 10.4028/www.scientific.net/DDF.283-286.681
M3 - Artículo
AN - SCOPUS:62149119904
SN - 1012-0386
VL - 283-286
SP - 681
EP - 686
JO - Defect and Diffusion Forum
JF - Defect and Diffusion Forum
ER -