Abstract:The approach,which is to modify the microstructure and improve the room temperature ductility of Ti-45Al-10Nbt0.1Y alloy by means of isothermic forging and heat treatment,is explored. The relationship between the microstructure and mechanical propertics is described in this paper,also.

Abstract:报导了Ｔｉ－３１钛合金的力学性能、高温热稳定性和在高温高压水中的耐腐蚀及抗脆性破坏性能．试验结果表明，Ｔｉ－－３１合金具有良好的综合机械性能，在高温高压ＬｉＯＨ溶液中吸氢少，抗脆性能好，可在３５０℃的环境长期使用；该合金还具有良好的焊接性和工艺性能，可制造各种板、棒、管、饼及零部件，是某些动力装置理想的候选材料。

Abstract:nfluence of curvature radius and insulation on critical current of Bi-2223 silver-clad tapes havebeen investigated.Characteristics of the test magnet assembled with four double-pancake coils madeby W&R are reported.

Abstract:The influnces of adding AL Mo and Zr elements on corrosion resistance of Ti-Ta alloy in boiling 40% nitric acid solution, and the effect of Ru3+adding into the solution on the alloys have been researched by immersion tests and electrochemistry method.The results show that the corrosion resistances of the alloys are reduced slightly after adding Al and Mo elements in Ti-Ta alloy,and the corrosion resistance is increased by adding Zr.The passivations of all researched alloys are promoted by R3+in solution,and the corrosion resistances of the alloys are increased.The results of elechro-chemical means agree completely with corrosion test.

Abstract:This paper reviews the using situation and prospect of titanium and zirconium alloy tubes for power station in the ninth five-year plan and the beginning of nect century.We also discuss the act of satisfying the inquirement of market and reaching to the advance level in the world should be taken for the Titanium and Zirconium alloy tubes in use for power station.

Abstract:The Stereofrontier Strategies of the United States of American and the advancedtechnology plans of the Countries in Europe and Asia are presented in this Paper

Abstract:钛合金表面激光熔覆氧化锆陶瓷后，在钛合金基体和氧化锆陶瓷之间形成冶金过渡层。本用ＳＥＭ、ＴＥＭ观察过渡层的组织形态，利用选区电子衍射技术分析各组织的相结构，采用Ｘ射线能仪分析过渡层内的成分分布。过渡区是由三层组成，即近热影响区胞状晶ａ，中间层粒状Ｚｒｏ２＋ａ相，近熔覆区粒状ＺｒＯ２＋胞状枝晶ＺｒＯ２＋晶间ａ相。从热影响区到熔覆区过渡区内，塑性相ａ逐渐减少，相反脆性相ＺｒＯ２逐渐增加，由此证明激光熔

Abstract:n the basis of summarizing the modles of 2D grain rearrangement in superplastic deformation, 3D grain rearrangement in superplastic deformation has been investigated.Metallographic observations show that fine marginal lay'Cr grains at latitudinal direction ofplate specimens of 1#(8090)Al-Li alloy filled in the cavities created at tension direction oflarge central layer grains, and completed grain rearrangement. Grain emergence and rotation of large Al,Zr phase in Al-Li-Zr alloy deformed were observed With SEM.The results show that fine grains fill 'in f cavities by grain rotation, which is a process of energy decrease. Thephenomena of decrease in the latitudinal size of specimen and migration of local necking atthe specimen margin in the superplastic deformation ean be explained by the motion of finegrains at latitudinal direction.

Abstract:用电化学极化方法研究了Ｔｉ５０Ｎｉ５０，Ｔｉ５０Ｎｉ４２Ｃｕ８及３１７Ｌ合金在不同ｐＨ值的１５ＮａＣｌ水溶液中的耐蚀性。恒电位阳极极化曲线表明：Ｃｕ的加入明显提高了ＴｉＮｉ合金的再钝化电位；但对点蚀电位的影响较复杂，在ｐＨ１￣５时ＴｉＮｉＣｕ高于ＴｉＮｉ合金，在ｐＨ＝６￣１０时ＴｉＮｉＣｕ则低于ＴｉＮｉ合金，ｐＨ值增大至１１￣１３时，两者又趋于接近。实验中还发现，与３１７Ｌ相比，ＴｉＮｉ合金的点蚀

Abstract:The relations of the Vickers-hardness HV and the specific coer.cive force Hsc withmicrostructure and composition of WC- Co cemented carbides have been explored. The experimental regularity of the variety of the specific coercive force Hsc(A.m2. kg-1)with theVickers hardness HV (kg.mm-2)for two-phase and high- carbon WC-Co cemented carbides has been attained,which is: Hsc = 1.16+[ (1897/HV)-3.31]-1.The correspondentcoefficients of above expression vary with the carbon content.The possibility of evaluatingHV of WC-Co alloy by Hsc is discussed.

Abstract:选择合适的细钨粉、经等静压制，在１７００￣１８００℃下低温烧结，可制成「质量」密度为１６．５￣１７．５ｇ／ｃｍ＾３的Φ５０ ｎｍ纯钨棒。

Abstract:本研究利用醇盐水解法制备纳米级二氧化钛粉。采用正交设计法，探讨了操作条件及工程因素对反应的定量影响。筛选出最佳工艺条件为：反应温度３３℃；原料配比为：钛酸丁酯：乙醇：水：盐酸＝１：９：３：０．２８；反应器的高径比为２￣３；加料速度适中。经ＴＥＭ检测，可知颗粒粒度分介于８￣２５ｎｍ。Ｘ射线衍射分析结果表明：当热处理温度为５００℃时，所有晶粒均为锐钛型，随温度升高，颗粒长大，８００℃时，晶粒转变为金红