摘要：
A new type of wear resistant low carbon Fe–B cast steel with granular borides can be obtained by alloying with titanium and cerium rare earth (RE). As a result, the as-cast eutectic boride structures of Fe–B cast steel are greatly refined and a blocky, less interconnected boride network is obtained from continuous ledeburite. After heat treatment, the boride eutectic in the modified Fe–B cast steel is in the form of a granular boride structure that appears to be isolated particles The guide rollers made of modified low carbon Fe–B cast steel show excellent wear resistance and thermal fatigue resistance in high speed wire mills.
作者机构：
[匡加才] School of Material Science and Engineering, Changsha University of Science and Technology, Changsha 410076, China;[王林涛] China Office, Italy S.O.S. Group, Beijing 100037, China;[符寒光] Key Laboratory for Advanced Manufacturing by Materials Processing Technology, Tsinghua University, Beijing 100084, China
通讯机构：
[Kuang, J.-C.] S;School of Material Science and Engineering, Changsha University of Science and Technology, China
作者机构：
[戴晓元; 华熳煜; 吴茵] School of Materials Science and Engineering, Changsha University of Science and Technology, Changsha 410076, China;[戴晓元; 夏长清; 孙振起] School of Materials Science and Engineering, Central South University, Changsha 410083, China
通讯机构：
School of Materials Science and Engineering, Changsha University of Science and Technology, China
作者机构：
College of Materials Science and Engineering,Changsha University of Science and Technology,Changsha;College of Materials Science and Engineering,Hunan University,Changsha 410082,China
会议名称：
2007年国际有色金属大会(International Conference of Nonfereous Materials '2007)(ICNFM)
会议时间：
2007-11-28
会议地点：
长沙
会议论文集名称：
2007年国际有色金属大会（International Conference of Nonfereo
关键词：
aerosol;carbon nanotubes;aligned morphology
摘要：
A novel aerosol method for the production of alighed carbon nanotubes was presented.Multi-walled carbon nanotubes (MWNTs) with fairly uniform diameters and aligned MWNT bundles were obtained by using solutions of organometallics such as ferrocene in hydrocarbon solvents.A hollow and multi-walled structure was observed with diameter ranging from 15 to 50 nm,leading aspect ratio to be over 200.The quality of the product is dependent on the pyrolysis temperature,carrier gas flow rate and the catalyst precursor concentration.For the sample synthesized at 900 ℃,G/D is 1.81.G/D of samples obtained at 850 ℃ and 800 ℃ are 1.18 and 0.77,respectively.The inclusion of acetylene to an atomized spray of ferrocene in hexane yield aligned MWNT bundles with a narrow diameter distribution.
作者机构：
[匡加才] Department of Material Science and Engineering, Changsha University of Science and Technology, Changsha 410076, China;[王林涛] China Office, Italy S. O. S. Group, Beijing 100037, China;[符寒光] Department of Mechanical Engineering, Tsinghua University, Beijing 100084, China
通讯机构：
Department of Material Science and Engineering, Changsha University of Science and Technology, China
作者机构：
[龙春光; 钟志华; 何莉萍] State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, Changsha 410000, China;[龙春光] Institute of New Type Tribology and Wear Resistance Materials, Changsha University of Science and Technology, Changsha 410076, China
通讯机构：
[Long, C.-G.] S;State Key Laboratory of Advanced Design and Manufacture for Vehicle Body, Hunan University, China
作者机构：
[匡加才] Department of Material Science and Engineering, Changsha University of Science and Technology, Changsha 410076, China;[符寒光; 黄黎明; 邢建东] State Key Laboratory for Mechanical Behavior of Materials,, School of Materials Science and Engineering, Xi'an Jiaotong University, Xi'an 710049, China
通讯机构：
Department of Material Science and Engineering, Changsha University of Science and Technology, China
摘要：
Effect of RE-N on the solidification microstructures of Fe-B-Ti alloy containing 0.3%C, 2.0%B, and 1.0% (mass fraction)Ti was investigated by optical microscopy (OM), scanning electron microscopy (SEM), energy dispersive X-ray spectrometry (EDS) and X-ray diffraction (XRD) analysis. The results indicate that the solidification microstructures of Fe-B-Ti alloy consist of Fe<inf>2</inf>B, TiB<inf>2</inf>, pearlite, ferrite and martensite. The shape of Fe<inf>2</inf>B is continuous and netlike. TiB<inf>2</inf> is distributed in the form of independent blocks. The amount of TiB<inf>2</inf> is obviously less than that of Fe<inf>2</inf>B. After modification with RE-N, the grain and eutectic structure of Fe-B-Ti alloy refine obviously and the distribution of the borides is homogeneous. The borides are still Fe<inf>2</inf>B and TiB<inf>2</inf> in the modified Fe-B-Ti alloy and there are many obvious necking and broken net in the borides. The reason why RE-N changes the morphology and distribution of borides was particularly discussed.
作者机构：
[戴春霞] Institute of Chemistry and Environmental Engineering, Changsha University of Science and Technology, Changsha 410076, China;[陈建兵] Institute of Automobile and Mechanical Engineering, Changsha University of Science and Technology, Changsha 410076, China;[吴茵; 华熳煜; 龙春光] Institute of Material Science and Engineering, Changsha University of Science and Technology, Changsha 410076, China
通讯机构：
[Dai, C.-X.] I;Institute of Chemistry and Environmental Engineering, Changsha University of Science and Technology, China
