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燃气轮机用大型定向结晶铸件制备及组织与性能研究张健1,申健1,卢玉章1,楼琅洪1(1.辽宁省沈阳市科学院金属研究所)摘 要:对高温度梯度液态金属冷却(LMC)定向凝固技术中低熔点合金污染,模壳变形破裂等关键问题进行了分析,通过优化LMC定向凝固工艺,解决了430mm长大型铸件变截面位置的断晶,偏晶等问题,分析了铸件的显微组织,热处理工艺及典型力学性能,成功研制了大型定向结晶叶片.关键词:高温合金; 定向凝固; 液态金属冷却; 叶片......
Semisolid forging electronic packaging shell with silicon carbon-reinforced copper compositesKai-Kun WangSchool of Materials Science and Engineering,University of Science and Technology Beijing摘 要:To fabricate electronic packaging shell of copper-matrix composite with characteristics of high thermal conductivity and low thermal expansion coefficient......
基于Python的WEB黑客攻击技术分析研究贺军忠陇南师范高等专科学校摘 要:通过对Web黑客攻击的语言分析研究,得知大部分黑客都以Python为攻击语言,依托Internet对各种网络服务器和客户端进行攻击与密码破解.文章着重从基于Python的各种Web攻击目的入手,通过列举的方法分析研究各种Web黑客攻击技术与攻击过程.根据各种基于Python的WEB黑客攻击技术的攻击方法,分析研究其攻击过程,为企业等部门与单位的Web安全防护提供理论依据.关键词:WEB攻击;XSS攻击;SQL注入;Web shell攻击;......
Heat transfer analysis for the roller shell under the condition of periodic thermal shockLihua Zhan and Xiaoqian LiCollege of Electro-mechanical Engineering, Central South University, Changsha 410083, China摘 要:<正> According to the actual working conditions of roller shell in the process of continuous roll casting, the Fourier heat transfer law......
Non-uniform heat transfer behavior during shell solidification in a wide and thick slab continuous casting moldZhao-zhen Cai,Miao-yong ZhuSchool of Materials and Metallurgy, Northeastern University摘 要:By employing a two-dimensional transient thermo-mechanical coupled finite element model for simulating shell heat transfer behaviors within a slab......
Amendment on the strain measurement of thin-walled human skull shell as intracranial pressure changesXianfang Yue , Li Wang, and Feng Zhou School of Mechanical Engineering, University of Science..., is deformed with changing intracranial pressure (ICP). Because the human skull’s thickness is only 6 mm, it is simplified as a thin-walled shell. The objective of this article is to analyze the strain......
relaxation process of the supercooled and glassy Pb, and the metastable bcc phase plays an important role in the precursor of crystallization. Key words: supercooling liquid; amorphous metal Pb; isothermal... the formation and evolution characteristics of bcc phase during the isothermal relaxation processes of supercooled liquid and amorphous metal Pb, by using molecular dynamics method, and adopting the cluster-type......
Single-crystal TiO2/SrTiO3 core–shell heterostructured nanowire arrays for enhanced photoelectrochemical performanceYing Chen,Shi Li,Ruo-Yu Zhao,Wei Li,Zhao-Hui Ren,Gao-Rong Han摘 要:Vertically aligned TiO2/SrTiO3 core–shell heterostructured nanowire arrays with different shell thicknesses(5–40 nm) were fabricated on fluorine-doped tin oxide substrate via......
Preparation and properties of thermal insulation coatings with a sodium stearate-modified shell powder as a fillerQiang Tang1,Ya-mei Zhang1,Pei-gen Zhang2,Jin-jie Shi1,Wu-bian Tian2,Zheng-ming Sun21... Science and Engineering, Southeast University摘 要:Waste shell stacking with odor and toxicity is a serious hazard to our living environment. To make effective use......
Microstructure and properties of electronic packaging shell with high silicon carbide aluminum-base composites by semi-solid thixoformingGUO Ming-hai(郭明海), LIU Jun-you(刘俊友), JIA Cheng-chang(贾成厂), JIA Qi-jin(贾琪瑾), GUO Shi-ju(果世驹) (School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China)Abstract:The electronic packaging shell with high......