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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，其在第Ⅲ脆性温度区的脆化向低温侧延伸
The high-temperature ductility of samples containing niobium, niobium-bearing titanium and niobium-vanadium-titanium steel slabs at 10-3s-1 strain rate was measured. At high temperature, TiN precipitates mainly in the tensile specimen. At about 900 ℃, the precipitation of niobium carbonitride reaches its peak, the precipitation temperature of vanadium is lower than that of titanium and niobium, and a considerable amount of vanadium is precipitated at 700 ℃ . There are mainly three types of carbon and nitride precipitates in the sample: (1) bulk TiN precipitated at high temperature; (2) fine dynamic precipitates precipitated near 900 ° C (sharp precipitates caused by such precipitates); (3) The resulting composite precipitate. The sample containing more niobium and vanadium γ → α has a delayed eutectoid transformation and its embrittlement in the third brittle temperature region extends toward the low temperature side