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; 文献标志码:A 文章编号:1672-7207(2013)03-0936-06 Factors affecting quality in hot stamping of aluminum alloy...: A finite element model was established for hot stamping of aluminum alloy, and the factors affecting quality were investigated including initial blank temperature, stamping velocity, blank holder force......
Cold Resistant Properties of High Modulus Polyurethane章于川Key Laboratory of Enviroment-friendly Polymer materials of Anhui Province, School of Chemistry and Chemical Engineering, Anhui University摘 要... and cold resistant properties of PU were systematically investigated by FTIR, XRD, DMTA,universal testing machine and flex ductility machine. The results show that Tg of soft segment is the main factor......
J. Cent. South Univ. (2021) 28: 48-57 DOI: https://doi.org/10.1007/s11771-021-4585-1 Production of titanium powder by metallothermic reduction of TiO2 in cold pressed pellets ZHENG Hai-yan(郑海燕)1, 2... titanium (Ti) with high productivity, fundamental studies on producing metallic Ti from titanium dioxide (TiO2) in the cold pressed pellets were conducted by metallothermic reduction with an indirect......
simulation[J]. Forging & Stamping Technology, 2016, 41(1): 52-56. [6] 叶彩虹. 行星直齿轮冷挤压工艺技术的研究[D]. 重庆: 重庆大学材料科学与工程学院, 2016: 1-2. YE Caihong. Research on cold extrusion process technology for planetary...精度;数值模拟 中图分类号:TG316 文献标志码:A 文章编号:1672-7207(2017)08-1995-07 The choice of cold......
Influence of chemical composition and cold deformation on aging precipitation behavior of high nitrogen austenitic stainless steelsLI Hua-bing(李花兵), JIANG Zhou-hua(姜周华), FENG Hao(冯浩), ZHU Hong-chun(朱红春), ZHANG Zu-rui(张祖瑞) (School of Materials and Metallurgy, Northeastern University, Shenyang 110819, China)Abstract:The influence of chemical composition and cold deformation on aging precipitation......
珠光体钢丝冷拉拔过程中微观组织及铁素体微区取向与织构演变张晓丹1,1,刘伟1,刘庆2(1.北京市清华大学材料科学与工程系2.重庆大学 材料学院)摘 要:采用电子通道衬度(ECC)和电子背散射衍射(EBSD)技术研究了珠光体钢丝冷拉拔过程中微观组织的变化,铁素体微区取向与织构演变,结果表明,珠光体变形组织中存在剪切带(S带),它们的出现与渗碳体片条和拉拔方向之间的夹角有关:夹角越大,S带越多,随着拉拔应变量的增大,纵截面上珠光体片条逐渐转向拉拔方向,S带方向与拉拔方向的夹角逐渐减小,珠光体内的S带会引起铁素体晶粒......
powder cold roll forming and reactive synthesis JIANG Yao, HE Yue-hui, TANG Yi-wu, LI Zhi, HUANG Bai-yun (State Key Laboratory of Powder Metallurgy, Central South University, Changsha 410083, China) Abstract: Ti-Al alloy sheets were fabricated successfully by element powder cold roll forming and reactive synthesis. The size and relative density of sheet bars were 500mm×230mm×1.5mm, 85.9......
熔炼;TC4钛合金;温度场;模拟 中图分类号:TG294 文献标志码:A Temperature field simulation of electron beam cold hearth melting TC4 alloy LUO Lei1, 2, MAO Xiao-nan2, LEI Wen-guang2, YU Lan-lan2... Metal Research, Xi’an 710016, China) Abstract: From ANSYS simulation, electron beam cold hearth melting process of TC4 titanium alloy was studied. The results show that after the melt trickles from......
2D DEM analyses for T-M coupling effects of extreme temperatures on surrounding rock-supporting system of a tunnel in cold regionZHANG Yu-jun(张玉军)1, YANG Chao-shuai(杨朝帅)1, 2, WANG Yong-gang(王永刚)3(1... in cold region, and the influence degree of extreme lowest temperature is the highest.Key words:extreme temperature; tunnel in cold region; thermo-mechanical coupling; distinct element method......
, 2018, 255: 927-935. DOI:10.1016/j.jmatprotec.2018.01.004. [5] NIE Y, ZHANG P, WU X, LI G, YAN H, YU Z. Rapid prototyping of 4043 Al-alloy parts by cold metal transfer [J]. Science and Technology... as feedstock, and offers the potential to produce large dimensional structures at much higher build rate and minimum waste of raw material. In the present work, a cold metal transfer (CMT) based additive......