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高温钛合金支架制件热成形工艺研究 被引量:1
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作者 余亚平 《模具制造》 2014年第6期84-86,共3页
以BTi6431S高温钛合金带曲面法兰的盒形支架制件为对象,在分析其拉伸成形工艺特性的基础上,设计制造了热拉伸成形模,并拟定了相应的热拉伸工艺技术方案,经过热拉伸工艺试验,得到了满足图纸要求的合格制件。本文研究成果可为该类新型钛... 以BTi6431S高温钛合金带曲面法兰的盒形支架制件为对象,在分析其拉伸成形工艺特性的基础上,设计制造了热拉伸成形模,并拟定了相应的热拉伸工艺技术方案,经过热拉伸工艺试验,得到了满足图纸要求的合格制件。本文研究成果可为该类新型钛合金的热拉伸成形模及工艺设计提供参考。 展开更多
关键词 BTi6431S钛合金 热拉伸成形 工艺参数
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Process parameters optimization of Ti-6Al-4V alloy sheet during hot stretch-creep forming 被引量:3
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作者 肖军杰 李东升 +4 位作者 李小强 丁盼 赵凯 黄烜昭 续明进 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2015年第2期420-428,共9页
Hot stretch-creep forming (SCF) is a novel technique to produce hard-to-form thin-walled metal components. Comprehensively considering the analysis results of the springback angle, yield strength and microstructure,... Hot stretch-creep forming (SCF) is a novel technique to produce hard-to-form thin-walled metal components. Comprehensively considering the analysis results of the springback angle, yield strength and microstructure, four hot SCF process parameters including temperature, stretch velocity, post stretch percentage and dwelling time of a Ti-6Al-4V alloy sheet were optimized using an orthogonal experiment. The results reveal that temperature is the most important factor on springback angle. The yield strength of the deformed material in 0° direction increases, while those in directions of 45° and 90° fluctuate around the original value. After hot SCF, the shape of some a phases changes from short thin grains to long slender ones, and the microhardness changes very little. The optimized parameters with temperature of 700 ℃, stretch velocity of 5 mm/min, post stretch percentage of 2% and dwelling time of 8 min are achieved finally. 展开更多
关键词 Ti-6Al-4V alloy hot stretch-creep forming SPRINGBACK orthogonal experiment OPTIMIZATION
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Experimental Research of Automotive Needlepunched Carpets at Thermoforming Temperatures
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作者 张云青 郭志英 +1 位作者 董湘怀 李德群 《Journal of Donghua University(English Edition)》 EI CAS 2007年第6期728-733,739,共7页
Tensile properties with different thermoforming conditions and deformation mechanism at thermoforming temperatures of automotive needlepunched carpets made up of three layers of different materials were reported.Inves... Tensile properties with different thermoforming conditions and deformation mechanism at thermoforming temperatures of automotive needlepunched carpets made up of three layers of different materials were reported.Investigations on the tensile properties were performed as a function of thermoforming temperature,extensile speed and fiber orientation based on an orthogonal experiment design.The experimental results show that the automotive carpets are rate-dependent anisotropic one and very sensitive to the forming temperature.The tensile properties are strongly depended on the forming temperature when compared with the extensile speed and the fiber orientation.Experiments only varying with the temperature were performed because of the dominative effect of the temperature.Different deformation performances were observed with different temperatures.Deformation mechanisms at the thermoforming temperatures were presented to explain the nonlinear trend of the ultimate elongation with the temperatures based on the combination of the experimental observations and the corresponding polymer theories. 展开更多
关键词 automotive carpet tensile property experimental research deformation meachanism
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