Ti—241Al—14Nb—3V—0.5Mo合金拉伸变形显微组织的研究

用透射电子显微镜研究了Ｔｉ３Ａｌ－Ｎｂ（Ｔｉ－２４Ａｌ－１４Ｎｂ－３Ｖ－０．５Ｍｏ）合金拉伸变形显微组织，利用双倾技术和双束条件下ｇ．ｂ＝０不可见判据，分析了合金中具有Ｄ０１９结构的α２相在拉伸过程中的变形机制。     

钛纤维强化Ti－48Al－2Cr－2Nb合金复合材料性能与界面研究

用物理气相沉积法在钛纤维表面蒸镀一层厚约２．５μｍ的Ｙ２Ｏ３涂层，用真空热压工艺制备钛纤维强化Ｔｉ－４８Ａｌ－２Ｃｒ－２Ｎｂ钛铝化合物基复合材料。对该复合材料的力学性能、界面、组织进行了研究。结果表明：钛纤维强化Ｔｉ－４８Ａｌ－２Ｃｒ－２Ｎｂ合金复合材料的弯曲强度较基体Ｔｉ－４８Ａｌ－２Ｃｒ－２Ｎｂ合金提高了１５％，但弯曲挠度和弹性模量变化不大。靠近界面基体组织出现片层化倾向，纤维损耗严重，其界面反应厚度约２０μｍ。     

Ti－14Al－21Nb合金的显微组织与力学性能

采用Ｘ射线、光学显微镜、高压透射电镜和自动图像分析仪以及室温、高温力学性能的测试设备，研究了Ｔｉ－１４Ａｌ－２１Ｎｂ合金的合金化、热变形及热处理对该合金的显微组织和性能的影响     

热机械处理对Ti3Al基合金板条组织形貌及室温拉伸性能的影响

研究了热机械处理（ＴＭＰ）对Ｔｉ３Ａｌ基合金Ｔｉ－２４Ａｌ－１４Ｎｂ－３Ｖ（原子分数％）板条组织的形貌及室温拉伸性能的影响，通过ＴＭＰ可获得各种各样的板条组织。Ｔｉ－２４Ａｌ－１４Ｎｂ－３Ｖ板条组织的最高断裂强度可达１２２５ＭＰａ，最大伸长率达８．５％，对板条形貌与室温拉伸性能的关系进行了分析，用ＳＥＭ观察了室温拉伸过程中的裂纹扩展情况，经ＴＥＭ观察发现，在缓冷样品中板用周边存在着一种α２＋Ｏ相的     

Ti－3Al－2．5V合金管的研制

本文介绍了高级自行车用Ｔｉ－３Ａｌ－２．５Ｖ合金管的研制过程，着重叙述其加工工艺与性能。研制结果表明。Ｔｉ－３Ａｌ－２．５Ｖ属于近α型钛合金，具有较好的冷热塑性变形能力，管材性能优良，适用于作赛车、山地车的车架材料。     

Ti－Ni－Nb合金中Ni的络合滴定

Ｔｉ－Ｎｉ－Ｎｂ合金中Ｎｉ的络合滴定董天祥,刘凤琴（北京航空材料研究所,北京,１０００９５）文献曾报道过Ｔｉ－Ｎｉ合金中Ｎｉ的容量测定法,试验发现,使用该法测定Ｔｉ－Ｎｉ和Ｔｉ－Ｎｉ－Ｎｂ合金时,用铜溶液滴定终点十分不明显,难以观察。本文提出了以ＰＡ...     

Ti—14Al—21Nb合金的显微组织与力学性能

采用Ｘ射线、光学显微镜、高压透射电镜和自动图像分析仪以及室温、高温力学性能的测试设备，研究了Ｔｉ－１４Ａｌ－２１Ｎｂ合金的合金化、热变形及热处理对该合金的微组织和性能的影响。     

Ti－Al－Nb三元系1400℃等温截面的测定

利用液－固扩散偶，借助电子探针微区成份分析（ＥＭＯＡ）、彩色金相观察测定Ｔｉ－Ａｌ－Ｎｂ三元系１４００℃的等温截面图。研究结果表明：Ｔｉ－Ａｌ－Ｎｂ三元系１４００℃等温截面中存在七个二元单相区，分别为β、α、γ、η、σ、δ、Ｌ；一个三元单相区γ＿１及七个三相区；ＴｉＡｌ（１：１）处于γ＋α两相区中；富铝区有较大的液相区。试验同时确定了γ＿１与σ、η异相共轭关系。     

钛铝系金属间化合物研究开发现状

本文综述了Ｔｉ３Ａｌ－、ＴｉＡｌ－和Ａｌ３Ｔｉ－基金属间化合物合金近年来在研究和开发方面所取得的进展。     

铌对Ti3Al价电子结构及其脆性的影响

应用固体与分子经验电子理论计算了Ｔｉ３Ａｌ及加入铌后各相的价电子结构,并从均匀变形因子α,解理能Ｇｃ及位错行为等方面分析了铌对Ｔｉ３Ａｌ脆性的影响,铌使Ｔｉ３Ａｌ合金的α及Ｇｃ提高;同时氟也减弱了Ｔｉ－Ｔｉ共价键,增加了基面滑移,从而导致Ｔｉ３Ａｌ脆性有本质改善。     

熔炼次数对M17返回料合金成分、组织和性能的影响

实验结果表明,M17铸造高温合金(%:0.16C、8.79Cr、5.79A1、4.93Ti、3.29Mo、15.20Co、0.78V、0.015B、0.073Zr、0.002S、0.001P、0.001 1O、0.001 0N)经25 kg真空感应炉返回重熔后,Si含量随重熔次数的增加而略有增加,合金中主要元素和其它杂质元素S、P、H的含量变化不大,而氧、氮略有增加;合金中初生碳化物由新合金中的草书体逐渐向返回合金块状转变,初生碳化物的遗传性堵塞合金凝固时的补缩通道,使返回料合金的疏松倾向增大,高温塑性下降较大。     

Shijiazhuang will Build the World's Biggest Replacingcopper-with-aluminum Cable Production Base

正Shijiazhuang City will build the world’s biggest replacing-copper-with-aluminum cable production base,the annual output value can reach 100 billion yuan,in the future it will develop replacing-copper-with-aluminum highend industry cluster.This piece of news was learned by the reporter at the Rare Earth highiron Aluminum Alloy[Nonferrous Business Opportunity:Aluminum alloy door]Cable Conductor New Technology Application Seminar held at the provincial capital.     

Chongqing is Preparing to Set Up Nonferrous Metal Exchange,in a Bid to Become the Transit Place of Kazakhstan Copper

正Since the beginning of Chongqing’s upgrading to a municipality directly under the Central Government,Chongqing City has established direct friendly relationship with Almaty,Kazakhstan,and carried out a series of cooperation in commerce and trade,and culture     

Guangxi Baise Extends Industrial Chain to Combat Loss in Aluminum Business

正"For each tonne of aluminum being produced,the upstream enterprise on the aluminum industrial chain will suffer loss about 2000yuan."Said Liang Xiao,Deputy Director of Pingguo Industrial Park Management Committee under the Guangxi Baise City,one of the four major aluminum industry bases in China,on August 11.Extending aluminum     

JOURNAL OF IRON AND STEEL RESEARCH INTERNATIONAL ANNUAL CONTENTS Volume 21(2014)

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Chinalco Straightened Out Copper Assets,and Delegated Stock Equity of Yunnan Copper

正Immediately after the news that Chinalco transferred 58%stock equity of Yunnan Copper Group to its wholly-owned subsidiary China Copper Corporation Limited free of charge was disclosed on July 9,many individual investors couldn’t help but to think:Does it mean China Copper Corporation Limited will assemble assets for overall listing?At present,among main copper business companies under China Copper Corporation     

The Development and Reform Commission Encourages Private Capital to Enter Geological Prospecting Field

正At the press conference recently held by the National Development and Reform Commission under the theme"Deepen Reform in Investment AuditApproval System",when answering questions from reporters,Huang Min,Director of the Department of Fixed Assets Investment of the National Development and Reform Commission,said that in the future it would continue to intensify efforts in geological prospecting,and actively guide social capital to enter this field.     

Guangxi's first Nickel Industry Development Research Report Was Released

正Recently,Guangxi Metallurgical Research Institute,a subsidiary of Guangxi Nonferrous Metals Group,completed survey on laterite and related manufacturers in the region,by combining the current development status of laterite both at home and abroad,it compiled Guangxi’s first"Research Report on the Development of Guangxi Nickel Industrial Chain"which adopted laterite as the study subject.This report expounded on the current     

China’s Major Non-ferrous Metals Imports & Exports(End of September. 2014)

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China's Major Non-ferrous Metals Imports & Exports

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