Effect of Initial Solidification Morphology on Hot CrackingSensitivity in Ti-added HSLA Steel
To clarify the mechanism of slab surface cracking in Ti-added HSLA steel, a laboratory cracking simulation test was carried out, and the effect of the initial solidification morphology on hot cracking sensitivity was investigated. Cracking sensitivity increased when the temperature ranges of the peritectic reaction zone, where 8, y, and liquid coexist in the phase diagram was elevated, as a result of changes in the chemical composition of the steel. This increase in cracking sensitivity was attributed to enhanced Ti segregation in the interdendritic region and uneven solidification due to the peritectic reaction. In addition, the possibility that cracking sensitivity can bereduced by controlling the molten steel flow at the solidifying front was shown.
surface crack Ti HSLA peritectic reaction continuous casting uneven solidification precipitation
Tetsuo Mochida Seiji Itoyama Takako Yamashita Makoto Suzuki Yasuo Kishimoto
Steel Research Laboratory. JFE Steel Corporation, 1 Kokan-cho, Fukuyama, Hiroshima, 721 -8510, Japan
国际会议
第十一届中日钢铁技术研讨会(11th China-Japan Symposium on Oron and Steel Technology)
武汉
英文
129-133
2007-10-29（万方平台首次上网日期，不代表论文的发表时间）