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W1-1.0C steel was chromized at 1173 K with double glow plasma surface alloying process, and the distribution of Fe, Cr,and C contents in the chromized layer was measured using glow discharge spectrum analysis (GDA). The behavior and mechanism ofcarbon migration during the formation of chromized layer were studied through thermodynamic analysis and calculation. The gradientof carbon chemical potential was regarded as the driving force of carbon migration. An equation was derived to describe the carboncontent varying with the chromium content within the carbon-rich region. The calculated results from the equation approximatedclosely to the experimental ones.
W1-1.0C steel was chromized at 1173 K with double glow plasma surface alloying process, and the distribution of Fe, Cr, and C contents in the chromized layer was measured using glow discharge spectrum analysis (GDA). The behavior and mechanism of carbon migration during the formation of chromized layer were studied through thermodynamic analysis and calculation. The gradient of carbon chemical potential was seen as the driving force of carbon migration. The gradient of carbon chemical potential was viewed as the driving force of carbon migration. calculated results from the equation approximatedclosely to the experimental ones.