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magnification image; (d) White fine lamellar structure in high magnification image 图6 钨喉衬扩散段经烧蚀后的显微形貌 Fig.6 Ablation morphologies of dilation part of tungsten nozzle: (a) Panorama; (b...,喉部以机械剥蚀为主,以熔化烧蚀及热化学烧蚀为辅,其烧蚀程度最为严重；收敛段为机械剥蚀和热化学烧蚀,其烧蚀程度次之；而扩散段则发生热化学烧蚀,其烧蚀程度最低. 关键词:等离子喷涂成形；钨喉衬；热等静压；烧蚀 中图分类号:TG146 文献标志码:A Ablation property of tungsten nozzle......
, and lead from bismuth-rich and arsenic-rich lead anode slime for bismuth, gold, and silver enrichment.The effects of the temperature, liquid-to-solid ratio, leaching time, and reagent concentration... amounts of NaSb(OH)6. Arsenic, antimony, and lead are thus separated from lead anode slime as Na3 As O4×10 H2 O and Pb2 Sb2 O7. Scanning electron microscopy and energy-dispersive spectrometry imaging......
Insights in active pulsing air separation technology for coarse coal slime by DEM-CFD approachDONG Liang(董良), ZHAO Yue-min(赵跃民), XIE Wei-ning(谢卫宁), DUAN Chen-long(段晨龙), LI Hao(李浩), HUA Cheng-peng(华成鹏) (School of Chemical Engineering and Technology, China University of Mining and Technology, Xuzhou 221116, China)Abstract:To research a novel technology for dry coarse coal slime beneficiation......
A NEURAL NETWORK FOR WELD PENETRATION CONTROL IN GAS TUNGSTEN ARC WELDING J.Q. Gao1,C.S. Wu1,Y.H. Zhao1 (1.Institute of Materials Joining, Shandong University, Jinan 250061, China) Abstract:Realizing of weld penetration control in gas tungsten arc welding requires establishment of a model describing the relationship between the front-side geometrical parameters of weld pool and the back-side......
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New Developments of Tungsten Technology in ChinaZuo Tieyong Zhao Qinsheng Li Songren Wang Jiuru Central South University of Technology,Changsha,China摘 要:<正> I.IntroductionIt is well known that China is rich in natural resources of tungsten.Before 1949 there was al-most no tungsten industry in our country except mining and ore dressing.Tremendous......
Received 25 December 2018; accepted 21 May 2019 Abstract: The dissimilar joints of AZ61 and ZK60 magnesium alloys were obtained by tungsten inert gas arc (TIG) welding and activating tungsten inert gas arc (A-TIG) welding processes. Microstructure characterization shows that, the fine α-Mg equiaxed dendrite crystals contained Mg17Al12 and MgZn2 particles in the fusion zone. The average size of the α......
Characterization of nanometer tungsten powdersLI Huiqian LIN Tao SHAO Huiping WU Chengyi GUO Zhimeng LUO Ji School of Materials Science and Engineering,University of Science and Technology Beijing,Beijing 100083,China摘 要:<正>Three types of tungsten powders were prepared by hydrogen reduction of three precursor powders at low temperature,which were......
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