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1精密锻造技术的研究进展与发展趋势显示文摘热精密锻造技术不仅能赋予零件近净复杂形状和尺寸,而且能使零件宏观性能在坯料性能基础上得到提高,是少无废料产生、绿色、节约型的高效高性能制造技术。综述了热精密锻造技术的应用现状,介绍了热模锻造、等温锻造、基于数值模拟的预制坯优化设计和精密锻造全过程工艺优化设计的国内外研究现状,最后对热精密锻造技术发展方向进行了展望。高峻 李淼泉 2015精密成形工程2015,7,6:7
2Quantitative analysis on microstructure evolution of Ti-6Al-2Zr-2Sn-2Mo-1.5Cr-2Nb alloy during isothermal compression显示文摘Isothermal compression tests of Ti-6Al-2Zr-2Sn-2Mo-1.5Cr-2Nb alloy were conducted at a Gleeble-1500 simulator in deformation temperature range of 1103–1243K, strain rate range of 0.01–5.00 s-1and height reduction range of 50 %–70 %. The effects of processing parameters on morphology, grain size and contents of a and b phases were discussed based on the quantitative microstructure examination, and the detailed explanation was shown. The results show that b transformed matrix will obviously grow up at higher deformation temperature or lower strain rate because of low grain growth activation energies. The content of a phase will decrease at higher deformation temperature or higher strain rate due to the phase transformation. Some elongated a or b grains exist at higher strain rate, implying that the dominant softening mechanism is dynamic recovery. The effect of height reduction on b transformed matrix is negligible, but the height reduction has some effects on the morphology of primary a phase.Jun Gao Miao-Quan Li Xiao-Di Li Dong Zhang Jian-Rui Xue Xue-Qi Jiang Chao-Yue Zhang Lu-Yang Liu 2015Rare Metals2015,34,9:2
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