| Title |
Research Paper / Mechaical Behavior : Effect of Decarburization Atmosphere on the Yield Point Elongation of Extra - Low Carbon Steel for Shadow Mask |
| Authors |
김교성(Gyo Sung Kim),황순영(Soon Young Hwang) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Abstract |
Yield point elongation(YP-EL) should be suppressed in shadow mask after decarburization annealing due to higher yield strength and non-uniform deformation. The effect of decarburization annealing atmosphere was examined to optimize the processing conditions. Laboratory experimental results revealed that YP-EL was decreased with higher dew point and annealing temperature. However, hydrogen partial pressure and gas flow rate did not show significant effect on YP-EL. Calculated diffusion rate of carbon showed that the decarburization was controlled by surface reaction. The YP-EL of shadow mask was varied according to the stacked position in the production line. This phenomenon was analyzed by thermodynamic calculation of equilibrium carbon content with CO+CO₂ gas, which could be formed by decarburization reaction. |