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and rail longitudinal displacement of CWR track on bridge in Budongquan region along Qinghai-Tibet railway ZENG Zhiping1, 2, ZHANG Xiangmin1, 2, SUN Yongning3, WANG Xuesong1, CHEN Xiufang1 (1. School...; 3. Qinghai-Tibet Railway Company, Xining 810007, China) Abstract: The experimental research and theoretical analysis about beam and rail longitudinal displacement of continuously welded rail (CWR......
钛脱氧钢中超细夹杂物内部结构和物相组成研究齐江华1,薛正良1,吴杰2,程常桂1,周利刚2(1.湖北省武汉市武汉科技大学钢铁冶金及资源利用省部共建教育部重点实验室2.武汉钢铁(集团)公司,湖北武汉 430080)摘 要:在真空感应炉中采用了真空碳脱氧再加钛终脱氧的脱氧工艺冶炼出了与高级别管线钢成分接近的试样钢,对钛脱氧钢中超细夹杂物的外部形貌,尺寸,内部结构和物相组成等进行了研究.在扫描电镜下通过对金相试样和电解提取的夹杂物的研究表明,钢中夹杂物是Ti-O-Mn-S形成的尺寸为1~3μm的球形复合夹杂物.通过离子......
the depth of ultrasonic vibration was applied on melt. The max amplitude of transverse vibration reaches 1/2 of the longitudinal vibration amplitude and the peak of transverse vibration appears above... radiation; longitudinal and transverse vibration; cavitation region 超声空化对铝合金凝固过程有细化晶粒[1-6],熔体净化[7],弱化合金元素富集并改善溶质元素偏析[8],增大合金元素固溶度且改变二次相分布等诸多优点[9],但目前关于超声空化处理熔体技术大基于定性研究,定量分析的研究报道甚少,深入了解超声波在铝熔体中的空化分布场是优化......
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,基于自适应高阶滑模观测器实现轮胎纵向力的估计,利用纵向力观测器(longitudinal force observer, LFO)输出值作为已知输入,结合信息融合滤波(information fusion filter, IFF)算法提出一种车辆状态级联估计方法.进行仿真实验,台架实验以及实车道路实验.研究结果表明:设计的纵向力观测器具有较高的纵向力估计精度,基于信息融合滤波的车辆状态估计方法能够...: The vehicle model with 3 degree of freedom and the tire model were established. An electric drive wheel model was presented and applied to the longitudinal force estimation. The estimation of tire......
;O326 文献标志码:A 文章编号:1672-7207(2014)03-0855-09 Perturbation method for longitudinal... 410083, China) Abstract: Considering Variable cross-section bar is an important structural member in engineering structure, the longitudinal and torsional vibration of bar with variable cross-section......
, was firstly applied to analysis of the velocity field for the forging. The analytical solution of the forging force with the effects of external zone and bulging parameter is obtained by strain rate inner.... Key words: GM yield criterion; three-dimensional forging; continuous velocity field; inner product; analytical solution  ......
; 文献标志码:A 文章编号:1672-7207(2015)03-1066-09 Inner heterogeneity within braided... in the vertical. "Three-body and two-surface" is considered as the typical inner structure of braided bar in the vertical, and the off silt layers and the lateral accretion body are the main factors......
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文献标志码:A Dendrite growth behavior of DZ417G superalloy under longitudinal magnetic field LI Xu, REN Zhong-ming, REN Wei-li, LI Xi, ZHONG Yun-bo, DENG Kang, DONG Jian-wen, CHEN Chao (Department of Materials Science and Engineering, Shanghai University, Shanghai 200072, China) Abstract: The influence of longitudinal magnetic field on the microstructures of DZ417G superalloy......