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Effect of diode-laser parameters on shear force of micro-joints soldered with Sn-Ag-Cu lead-free solder on Au/Ni/Cu pad WANG Jian-xin(王俭辛)1, XUE Song-bai(薛松柏)1, FANG Dian-song(方典松)2, JU Jin-long... soldering methods respectively. The influence of different heating methods as well as output power of diode-laser on shear force of micro-joints was studied and the relationship between the shear force......
J. Cent. South Univ. (2012) 19: 357-364 DOI: 10.1007/s11771-012-1012-7 Optimization of rotor shape for constant torque improvement and radial magnetic force minimization CHO Gyu-won, WOO Seok-hyun... magnetic force; cogging torque 1 Introduction An interior permanent magnet synchronous motor (IPMSM) is a mechanically strong structure with permanent magnets embedded in rotor, and the generating torque per......
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J. Cent. South Univ. (2019) 26: 3140-3155 DOI: https://doi.org/10.1007/s11771-019-4242-0 Determination of initial cable force of cantilever casting concrete arch bridge using stress balance... to obtain reasonable initial cable force in construction stage. In this study, stress balance and influence matrix methods were developed to determine the initial cable force of cantilever casting concrete......
to the corridor of magnetic force lines, therefore only an effectively closed magnet array structure can form a relatively uniform and closed discharge lane. The main reasons for electrons'' releasing from magnetic confinement are the vertical magnetic repelling force as well as a more and more weak confinement action in outer range etc. The dominant reasons for a comparatively low increase of substrate''s......
耐候钢异型坯连铸结晶器保护渣性能优化研究孙维1,汪开忠1,文光华2,唐萍2,刘慧3(1.安徽省马鞍山市马鞍山钢铁股份有限公司技术中心2.重庆大学 材料科学与工程学院, 重庆 4000443.重庆大学 材料科学与工程学院,重庆 400030)摘 要:由于异型坯形状复杂,在浇注耐候钢的过程中,铸坯表面质量较差,并经常发生粘结漏钢事故.通过实验室研究和工业性试验相结合的方法,根据异型坯连铸耐候钢的特点,分析了耐候钢异型坯表面质量差和浇注过程中发生粘结性漏钢的原因,提出了异型坯连铸耐候钢保护渣优化设计思路,重点研究了协......
Study on Coercive Force of Metallic Cobalt Powder刘寿荣摘 要:StudyonCoerciveForceofMetalicCobaltPowderLiuShourong(刘寿荣)TianjinInstituteofHardAloy,Tianjin300222,ChinaReceived20August1996Ab...关键词:......
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Coercive Force of γ-Phase in WC-Co Cemented Carbides刘寿荣,孙景摘 要:CoerciveForceofγ-PhaseinWC-CoCementedCarbidesLiuShourongandSunJing(刘寿荣)(孙景)(TianjinInstituteofHardAlloys,Tianjin300222,Tianji...关键词:......
异型坯连铸双浸入式水口浇铸技术模拟研究及工业实践杜松林1,2,包燕平1,王建军1(1.北京市北京科技大学 冶金与生态工程学院2.安徽省马鞍山市马钢第三钢轧总厂安徽马鞍山)摘 要:通过数学物理模拟以及工业应用实践,研究了异型坯结晶器内单,双浸入式水口浇铸时流场特征及实际冶金效果,优化了双浸入式水口的设计参数.模拟研究结果表明,双浸入式水口浇铸有利于异型坯结晶器内流场的均匀性和对称性,避免了单水口浇铸时局部区域流体流动强烈现象,改善结晶器液面的稳定性和波动均匀性;双浸入式水口最优设计参数为底孔直径23 mm,腹向侧......