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中国钢铁年会是中国金属学会定期举办的综合性学术会议,每两年召开一次,为国内外钢铁界同行相聚、交流信息、结交朋友、展示科技成果提供了良好平台。自1997年以来,已成功举办过五次,受到团体会员和广大冶金科学技术工作者的好评,也越来越多地受到国外钢铁同行的关注。2007中国钢铁年会将于2007年11月14~17日在成都召开。这是进入“十一五”时期的首次钢铁年会,中国钢铁工业持续高速增长,中国钢铁科技也进入了一个蓬勃发展的新时期,并成为钢铁生产高速增长的主要推动力量。未来,自主创新将成为国家经济和钢铁工业持续稳定健康增长的主要动力… 相似文献
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近年来纯净钢、帘线钢对钛含量控制严格,因此对冶金物料中二氧化钛含量提出全流程监控要求。石灰石及白云石作为重要冶金原料在钢铁行业中大量使用,现石灰石国家标准方法系列无二氧化钛含量的测定方法,因此建立一种准确测定石灰石及白云石中二氧化钛含量的方法有着非常重要的意义。实验采用二安替吡啉甲烷分光光度法测定石灰石及白云石中二氧化钛的含量,试样采用硼酸-碳酸钠混合熔剂高温熔融,利用二安替吡啉甲烷与钛(IV) 能形成稳定1∶3的黄色络合物[Ti(DAPM)3]4+的特性,采用分光光度法测定二氧化钛含量。在优化条件下,二氧化钛质量浓度在0~1.40 mg/L范围内符合比尔定律,波长385 nm处,表观摩尔吸光系数为1.39×104 L·mol-1·cm-1,校准曲线线性相关系数为0.999。按照实验方法测定标准物质QD10-119、YSBC28709a-2013、YSBC28713a-2013、SX07-10的测定结果与认定值一致,结果的相对标准偏差(RSD,n=6)为1.6%~2.6%。国内9家获得中国合格评定国家认可委员会认可的钢铁行业实验室之间的精密度试验证明方法具有良好的重复性和再现性。方法可以测定石灰石及白云石中0.005 0%~0.30%二氧化钛,重复性限r的回归方程为lgr=0.801 0 lgm-1.468 3,再现性R的回归方程为lgR=0.849 2 lgm-1.189 7。 相似文献
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李启华;余锦;刘菊英 《金属材料与冶金工程》2013,(5):45-48
在等精度测量、服从正态分布的前提下,主要针对标准偏差和平均值的标准偏差的意义进行较深入的探讨,以解决人们对其模糊认识和在化学检测领域的实际应用等问题。主要涉及的具体问题是:标准偏差和平均值的标准偏差的具体意义;计算公式中符号的规范化使用;标准物质定值中,标准偏差与不确定度A类评定方法的关系;在中国合格评定国家认可委员会(CNAS)组织的实验室现场评审工作中,化学分析检测结果不确定度A类评定方法的正确应用。 相似文献
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我国钢铁企业规模经济有效性分析 总被引:5,自引:0,他引:5
鉴于中国钢铁企业尚不处于充分竞争市场的现实,文章用数据包络分析方法来测度中国钢铁企业的规模经济性,并与国际大企业进行比较,揭示了中国大企业规模不经济的深层原因,同时提出了相应的改进措施。 相似文献
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钽铌工业的进步与展望 总被引:17,自引:5,他引:12
通过对以九0五厂(NNMS)为代表的我国钽铌工业的发展历程和世界钽铌工业发展历程的对比分析,采用了大量详实的第一手资料和基础数据。描述了我国钽铌工业发展的现状轮廓和技术发展历程及其在世界锝铌工业发展中所处的地位和竞争能力;阐明了在我国稀有金属钽铌资源冶,加技术领域中所存在的问题和面临的形势,从国家安全角度及行业整体发展的高度,提出了对国内稀有金属钽铌行业进行重组整合,并积极开发国外资源的可持续发展的战略构想。 相似文献
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铁合金质量、品种优化的技术方向 总被引:1,自引:0,他引:1
从我国钢铁产品结构调整、冶炼工艺技术及装备改进和钢材实物质量水平提高等方面分析了我国铁合金市场所面临的挑战,提出“纯净化”、“精品化”、“特色化”是我国铁合金产品质量、品种改进的重要技术方向。 相似文献
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从中国国家标准、中国有色行业标准、中国航空行业标准、中国进出口检验检疫行业标准、ISO国际标准、日本标准、欧洲标准、美国材料与试验协会(ASTM)标准等160余项国内外标准分析方法的角度,介绍了各区域和行业的标准分析方法现状。结合文献(期刊论文)方法,进一步综述了湿法化学分析方法和现代仪器分析方法及试样制备与预处理方法在铝及铝合金50余种元素项目分析中的应用现状和研究进展,重点评述了紫外-可见分光光度法、滴定法、重量法、电化学方法、火花放电原子发射光谱法、X射线荧光光谱法、原子吸收光谱法、电感耦合等离子体原子发射光谱法、质谱法、红外吸收法、热导法等分析方法的基本特点、测定范围和应用实例。引用文献74篇。 相似文献
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Fiona McCarthy Veena Sahajwalla John Hart N. Saha-Chaudhury 《Metallurgical and Materials Transactions B》2003,34(5):573-580
Interfacial reactions occurring between molten iron and carbonaceous materials are of great significance in the steel industry,
and specifically, the reaction of iron with metallurgical coke is one of the key phenomena occurring during blast furnace
ironmaking. Major operating parameters such as hot metal composition will be directly influenced by the reactions occurring
between liquid iron and coke. In the current investigation, the interfacial reactions occurring between coke and liquid iron
were studied at a temperature of 1550 °C using the sessile drop method to further the understanding of the fundamental reactions
occurring at the interface between coke and iron. The formation of interfacial reaction products was observed, and time-dependent
reactions were identified. The transfer of elements such as carbon, sulfur, and silicon was determined. The reduction of silica
was determined as having a major influence on the transfer of both silicon and carbon into liquid iron.
This article is based on a presentation given in the Mills Symposium entitled “Metals, Slags, Glasses: High Temperature Properties
& Phenomena,” which took place at The Institute of Materials in London, England, on August 22–23, 2002. 相似文献
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The changing scene in steel 总被引:1,自引:0,他引:1
H. W. Paxton 《Metallurgical and Materials Transactions A》1979,10(12):1815-1829
In the past thirty years the United States has moved from a position where it dominated world steel production to where it
is now only one of the major world steel producers. The interplay of technology, economics and world politics which has brought
this about will be reviewed, with particular emphasis on important technological changes which have occurred in the last three
decades. To illustrate how research, development and application interacted to bring about change, specific examples will
be given in ore reduction, continuous casting and high-strength steel products.
The Edward DeMille Campbell Memorial Lecture was established in 1926 as an annual lecture in memory of and in recognition
of the outstanding scientific contributions to the metallurgical profession by a distinguished educator who was blind for
all but two years of his professional life. It recognizes demonstrated ability in metallurgical science and engineering.
H. W. PAXTON is Vice President-Research of the United States Steel Corporation. He received a B.Sc. and M.Sc. in 1947 and
1948 from the University of Manchester and his Ph.D. in 1952 from the University of Birmingham. In 1953 he became Assistant
Professor of Metallurgical Engineering at Carnegie Institute of Technology, subsequently Carnegie-Mellon University, and became
Head of the Department of Metallurgy and Materials Science and Director of the Metals Research Laboratory of Carnegie-Mellon
in 1966. He was Visiting Professor in Metallurgy and Materials Science at Imperial College, London, in 1962–63 and at the
Massachusetts Institute of Technology in 1970, and served two years as the first Director, Division of Materials Research,
National Science Foundation 1971–1973. He was a consultant to industry from 1953 to 1974 and has authored many technical papers,
primarily in the field of physical metallurgy. He also co-authored a book,Alloying Elements in Steel, with the late Dr. E. C. Bain. Dr. Paxton received the Bradley Stoughton Award for young teachers of metallurgy in 1960.
He is a member of the American Association for the Advancement of Science, Directors of Industrial Research, and the Industrial
Research Institute; Fellow of the American Society for Metals and The Metallurgical Society of AIME; Past President of TMS;
Vice President of the American Institute of Mining Metallurgical, and Petroleum Engineers; Past Chairman of the General Research
committee of the American Iron and Steel Institute, and was elected to membership of the National Academy of Engineering on
April 3, 1978. 相似文献