WU Dongmei, WANG Xinhua, LIU Xinyu, WANG Wanjun, FEI Huichun, ZHANG Li, and YE Jinwei, Carbide and Nitride Precipitation in High Temperature Tensiled Specimens and Hot Ductility of Nb-and Ti-Containing Steel CC Slabs, J. Univ. Sci. Technol. Beijing, 4(1997), No. 2, pp. 21-25.
Cite this article as:
WU Dongmei, WANG Xinhua, LIU Xinyu, WANG Wanjun, FEI Huichun, ZHANG Li, and YE Jinwei, Carbide and Nitride Precipitation in High Temperature Tensiled Specimens and Hot Ductility of Nb-and Ti-Containing Steel CC Slabs, J. Univ. Sci. Technol. Beijing, 4(1997), No. 2, pp. 21-25.
WU Dongmei, WANG Xinhua, LIU Xinyu, WANG Wanjun, FEI Huichun, ZHANG Li, and YE Jinwei, Carbide and Nitride Precipitation in High Temperature Tensiled Specimens and Hot Ductility of Nb-and Ti-Containing Steel CC Slabs, J. Univ. Sci. Technol. Beijing, 4(1997), No. 2, pp. 21-25.
Citation:
WU Dongmei, WANG Xinhua, LIU Xinyu, WANG Wanjun, FEI Huichun, ZHANG Li, and YE Jinwei, Carbide and Nitride Precipitation in High Temperature Tensiled Specimens and Hot Ductility of Nb-and Ti-Containing Steel CC Slabs, J. Univ. Sci. Technol. Beijing, 4(1997), No. 2, pp. 21-25.
Metallurgy Engineering School, USTB, Beijing 100083, China
Baoshan Iron and Steel Co., Shanghai 200091
中文摘要
Hot ductility of the Nb- and Ti-containing line-pipe steel CC slab specimens were measured under the sirain rate of 1 × 10-3/s. Three types of precipitates were found in the fractured specimens. One was the block-shaped coarse TiN particles precipitated at high temperature. Another type was the fine dynamic precipitation products precipitated at 950~900℃ which caused remarkable ductility reduction of the steel. The third type was the co-existed precipitates formed by fine Nb precipitates nucleating and growing on TiN paricles. Compared with Nb-containing steel which contains no Ti, there was no ductility drop for Nb- and Ti-containing steel at temperature between 850℃ and Ar3 and, the γ→α transformation inside the grain matrixes proceeded faster, which both improved the ductility of the steel in the low ductility temperature Region Ⅲ.
Hot ductility of the Nb- and Ti-containing line-pipe steel CC slab specimens were measured under the sirain rate of 1 × 10-3/s. Three types of precipitates were found in the fractured specimens. One was the block-shaped coarse TiN particles precipitated at high temperature. Another type was the fine dynamic precipitation products precipitated at 950~900℃ which caused remarkable ductility reduction of the steel. The third type was the co-existed precipitates formed by fine Nb precipitates nucleating and growing on TiN paricles. Compared with Nb-containing steel which contains no Ti, there was no ductility drop for Nb- and Ti-containing steel at temperature between 850℃ and Ar3 and, the γ→α transformation inside the grain matrixes proceeded faster, which both improved the ductility of the steel in the low ductility temperature Region Ⅲ.
下载: