Nb-Ti-C alloys with different Ti contents(4%-16%,mole fraction)were fabricated by vacuum non-consumable arc-melting method.The results indicate that the alloys contain niobium solid solution(Nb_(ss)),carbides(Nb_(2)C,...Nb-Ti-C alloys with different Ti contents(4%-16%,mole fraction)were fabricated by vacuum non-consumable arc-melting method.The results indicate that the alloys contain niobium solid solution(Nb_(ss)),carbides(Nb_(2)C,(Nb,Ti)C)and eutectic of Nb_(ss)/MC.Carbides in the Nb-Ti-C alloys change from Nb_(2)C to(Nb,Ti)C with the increase of titanium content. Microstructures in the as-cast state include primary plate-like Nb_(2)C,eutectic of Nb_(ss)/Nb_(2)C,Nb_(ss) and secondary needle-like Nb_(2)C in Nb-5Ti-4C alloy,and other microstructures are primary Nb_(ss),eutectic of Nb_(ss)/(Nb,Ti)C.Morphology of carbides are changed apparently through adding different Ti contents,and morphology of Nb_(ss) changes from the cellular structure to dendrite.展开更多
简述了微合金钢中微量元素 Nb 的主要作用,回顾了应变诱导析出的研究方法及优缺点,阐明了变形奥氏体应变诱导析出相的种类,晶体结构,析出相的形成顺序、形貌和分布,分析了影响析出动力学的主要因素并简要介绍了应变诱导析出动力学模型...简述了微合金钢中微量元素 Nb 的主要作用,回顾了应变诱导析出的研究方法及优缺点,阐明了变形奥氏体应变诱导析出相的种类,晶体结构,析出相的形成顺序、形貌和分布,分析了影响析出动力学的主要因素并简要介绍了应变诱导析出动力学模型的最新发展。展开更多
文摘Nb-Ti-C alloys with different Ti contents(4%-16%,mole fraction)were fabricated by vacuum non-consumable arc-melting method.The results indicate that the alloys contain niobium solid solution(Nb_(ss)),carbides(Nb_(2)C,(Nb,Ti)C)and eutectic of Nb_(ss)/MC.Carbides in the Nb-Ti-C alloys change from Nb_(2)C to(Nb,Ti)C with the increase of titanium content. Microstructures in the as-cast state include primary plate-like Nb_(2)C,eutectic of Nb_(ss)/Nb_(2)C,Nb_(ss) and secondary needle-like Nb_(2)C in Nb-5Ti-4C alloy,and other microstructures are primary Nb_(ss),eutectic of Nb_(ss)/(Nb,Ti)C.Morphology of carbides are changed apparently through adding different Ti contents,and morphology of Nb_(ss) changes from the cellular structure to dendrite.
