The impact of basic boroaluminizing factors on diffusion layer thickness in low-carbon steels and its mathematical modeling

20th International Scientific and Research Conference "Metallurgy: Technologies, Innovation, Quality. Metallurgy-2017"

Mishigdorzhiyn, U.L.^1 ; Ulakhanov, N.S.^1

East Siberia State University of Technology and Management, 40V Kluchevskaya street, Ulan-Ude

670013, Russia^1

关键词: Basic parameters;    Diffusion layer thickness;    Diffusion layers;    Full factorial experiment;    Metallographic analysis;    Powder mixtures;    Technological factors;    Thermochemical treatments;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/411/1/012049/pdf
DOI  :  10.1088/1757-899X/411/1/012049

来源: IOP

【 摘 要 】

The paper presents the study of pack boroaluminizing carried out on steel 20 using mathematical planning methods. A mathematical model and nomograms showing the dependence of diffusion layer thickness on basic parameters factors of thermochemical treatment (technological factors such as temperature, treatment time and powder mixture composition) were obtained by means of conducting a full factorial experiment. The degree of impact which technological factors make on the final result and the ranges of their regulation are revealed. The temperature of pack boroaluminizing varied from 900 to 1000 °C, the duration of the process was 2-4 hours, and the ratio of the treatment components of B2O3 / Al was 40/60 to 50/50 wt-%. The metallographic analysis has revealed that the depth of the diffusion layer is from 80 to 260 μm, depending on technological factors.