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含铌低硅TRIP钢的拉伸行为研究唐正友1,丁桦1,赵文娟2,丁昊1,李龙3(1.辽宁省沈阳市东北大学材料与冶金学院2.中国科学院 金属研究所,辽宁沈阳 1100163.日本国立材料科学研究所,东京 305-0047)摘 要:采用定量拉伸,彩色金相,SEM,TEM和XRD对含铌低硅TRIP钢拉伸过程中的相变和应变硬化行为进行了研究.结果表明:在单向拉伸过程中,残余奥氏体的稳步相变使得塑性增加.残余奥氏体的相变速率与真应变的关系可以用ln[(Vγ0-Vγ)/(Vγ0-Vγu)]=lnk-cε来表示,随应变的进行,c......
alloys, prepared from elemental niobium and chromium powders under various ball milling time by hot pressing at 1 250 ℃ for 0.5 h, were investigated. The results indicate that if the ball milling time... be prepared from the more than 40 h MA powders, made from elemental chromium and niobium powders via hot pressing at 1 250 ℃ for 0.5 h. The HP temperature and time are reduced greatly compared......
. The BDD electrodes were deposited on the niobium (Nb) substrates by the hot filament chemical vapor deposition method. The effects of processing parameters, such as film thickness, current density....matlet.2015.05.069. [36] LIU Na, ZHU He-kang, WEI Qiu-ping LONG Hang-yu, DENG Ze-jun, YU Zhi-ming, XIE You-neng, WANG Jian, MA Li, ZHOU Ke-chao. A niobium and nitrogen co-doped DLC film electrode and its......
route, using strontium carbonate, barium carbonate, calcium carbonate, magnesia and niobium pentaoxide of analytical grade as raw materials. The phase composition, microstructure and dielectric......
microsegregation, and the segregation ratios of all elements in niobium solid solution (Nbss) in different regions tend to 1. After heat-treatment, the microhardness of retained eutectic cells increases... on the microstructure and mechanical properties of DZ951 alloy [J]. Rare Metals, 2008, 27(2): 216–222. [14] QU Shi-yu, HAN Ya-fang, SONG Li-guo. Microstructures and properties of refractory niobium......
(Mo), and niobium (Nb)) were obtained under the optimal conditions of the heating temperature of 850 °C, the heating time of 4 h, and the zinc/superalloy mass ratio of 10:1. In the subsequent vacuum...): 227-234. [30] MOSER Z. The Nb-Zn (niobium-zinc) system [J]. Journal of Phase Equilibria, 1992, 13: 425-429. [31] DOI K, ONO S, OHTANI H, HASEBE M. Thermodynamic study of the phase equilibria in the Sn-Ti-Zn......
采用OHTP工艺生产西气东输二线用22mm厚X80钢板聂文金1,王志福1,李冉1,李玉藏1,张晓兵1(1.江苏省淮安市江苏沙钢集团)摘 要:针对西气东输二线项目用厚规格X80钢板技术要求和沙钢炼钢,轧钢技术装备条件,采用低碳,高铌的HTP成分和OHTP(Optimized High Temperature Processing)控轧控冷工艺,进行了22 mm厚X80钢板批量生产和JCOE直缝焊管制管试验.结果表明,OHTP X80钢板无论力学性能,-15℃落锤性能,还是JCOE制管后管体屈强比均比HTP钢有明显......
pressure＝ at 1 000 ℃ for 40 min, then, niobium suboxide powder mainly composed of NbO was obtained. Physical properties and chemical composition are listed in Table 1. XRD results are given out... under the pressure of less than 2×10-2 Pa. SEM images of the obtained sintering the NbO anode bulks are shown in Fig.2. From Figs.1 and 2, it can be seen that, as-received niobium suboxide powder......
of solid solution during milling was discussed. 2 Experimental The Cu-Nb alloy with niobium content of 10%(mass fraction) was prepared. MA was performed using a QM-1F Mini-planetary ball mill... a remarkable line broadening and an intensity reduction in the first 40 h of milling. In addition, after long milling time (≥40 h), the niobium peaks are no longer detectable and the copper peaks move......
structural intermetallics[J]. Materials Review, 2000, 14(9): 1-5. [2] GLOWACKI B A. Niobium aluminide as a source of high-current superconductors[J]. Intermetallics, 1999, 7(2): 117-140. [3] GLOWACKI B A,YAN X Y, FRAY D, CHEN G, MAJOROS M, SHI Y. Niobium based intermetallics as a source of high-current/high magnetic field superconductors[J]. Physica C: Superconductivity and Its Applications, 2002......
