摘要
在１０－３ｓ－１应变速率下对含铌、含铌钛和含铌钒钛钢连铸坯试样的高温塑性进行了测定。高温下拉伸试样中主要以ＴｉＮ的析出为主，在９００℃左右，铌的碳氮化物析出达到高峰，钒的析出温度低于钛、铌，在７００℃时仍有相当数量的钒析出。试样中主要有３类碳、氮化物析出：①高温下析出的块状ＴｉＮ；②９００℃附近析出的微细动态析出产物（此类析出物造成钢塑性的急剧降低）；③依附在ＴｉＮ颗粒上生成的复合析出物。含较多铌、钒的试样γ→α先共析转变延迟。
Hot ductility of the Nb, Nb Ti and Nb V Ti containing steel CC (continuous cast) slabs was measured under the strain rate of 10 -3 s -1 . At higher temperature precipitate in tensiled specimen is mainly TiN. Niobium precipitation reached maximum when temperature is lowered to around 900 ℃. Vanadium precipitated at lower temperature than Ti and Nb. Three types of precipitates were found in the fractured specimens. One was the block shaped TiN particles precipitated at higher temperature. Another was the fine dynamic precipitation products precipitated at around 900 ℃, which caused remarkable ductility reduction. The third was the co existing precipitates formed by fine precipitates nucleating and growing on TiN particles. The γ→α pre eutectic transfer of the steel containing higher Nb and V was slower, which made the low ductility temperature region Ⅲ extend to lower temperature.
出处
《钢铁研究学报》
CAS
CSCD
北大核心
1998年第6期32-36,共5页
Journal of Iron and Steel Research
关键词
含铌钒钛钢
连铸坯
碳化物
氮化物
热塑性
Nb V Ti containing steel,continuous cast slab,carbide,nitride,hot ductility
