排序方式: 共有8条查询结果,搜索用时 62 毫秒
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开发了一种新型的斜轧管机用的顶头顶杆的快速连接装置,在实现快速更换的同时保证顶头内部的冷却。该装置现场使用效果良好,有效解决了扬州诚德960机组大直径顶头更换困难问题。 相似文献
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采用磁控共溅射法在Al2O3(0001)基片上沉积了Zn1-xCoxO(x=0.08~0.3%)薄膜,研究了基片温度对Co掺杂ZnO薄膜结构和磁性的影响.结果表明:Al2O3(001)基片很好地诱导了ZnCoO薄膜(002)取向生长,并且所有的薄膜均显示室温铁磁性.较低的基片温度不仅能有效抑制薄膜中Co2O3杂质相的产生,而且薄膜磁矩较大.紫外-可见光谱也表明,薄膜中Co2 取代了ZnO中Zn2 的位置. 相似文献
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在使用φ660三辊定径机生产不同规格钢管时需要拆装两根传动轴,耗用时间长。为此采用液压结构代替传动系统内的弹簧结构,在机架更换时传动轴无须吊离现场,使更换机架的时间大为缩短。 相似文献
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[SiO2/FePt]5/Ag thin films were deposited by RF magnetron sputtering on the glass substrates and post annealing at 550 ℃ for 30 min in vacuum. Vibrating sample magnetometer and X-ray diffraction analyser were applied to study the magnetic properties and microstructures of the films. The results show that without Ag underlayer [SiO2/FePt]5 films deposited onto the glass are FCC disordered; with the addition of Ag underlayer [SiO]FePt]5/Ag films are changed into L10 and (111) mixed texture. The variation of the SiO2 nonmagnetic layer thickness in [SiO2/FePt]5/Ag films indicates that SiO2-doping plays an important role in improving the order parameter and the perpendicular magnetic anisotropy, and reducing the grain size and intergrain interactions. By controlling SiO2 thickness the highly perpendicular magnetic anisotropy can be obtained in the [SiO2 (0.6 nm)/FePt (3 nm)]5/Ag (50 nm) films and highly (001)-oriented films can be obtained in the [SiO2 (2 nm)/FePt (3 nm)]5/Ag (50 nm) films. 相似文献
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