발간논문

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Vol.33, No.5, 656 ~ 666, 1995
Title
Precipitation Behavior of Precipitates in Ti or Zr - Containing Ultra - Low Carbon Steels
정우창Woo Chang Jeong, 한성호Seong Ho Han
Abstract
The precipitation behavior in cold-rolled and continuously annealed ultra-low carbon steels containing Ti or Zr has been investigated. The effect of Mn content between 0.2% and 1.0% on the precipitation behavior has been also studied. The annealed sheets of Ti-P steels contained three types of precipitates; TiN, TiS or MnS, TiN+TiS or TiN+MnS. The sulfide type precipitated depended on the Mn and Ti contents. With the increase in the Mn content, the amount of MnS sulfide increased. TiS or MnS in the combined precipitates of TiN+TiS or TiN+MnS, nucleated on a TiN particle and coarsened. The role of Zr in the precipitation behavior of Zr-P steels seemed to be very similar to the role of Ti in the Ti-P steels. The combined precipatates of ZrN and MnS or ZrS were mainly observed in the Zr-P steels. The sulfide type was changed from ZrS to MnS as the Mn content increased.
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