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Hot ductility of DSS and its microstructure observation during hot deformation

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Baosteel Technical Research 2010年第S1期4卷 83-页

作者： SONG Zhigang,ZHENG Wenjie,FENG Han,WU Zhongzhong,GUO Haisheng and YU Fei Central Iron & Steel Research Institute,Beijing 100081

selecting several typical DSS 00Cr22Ni5Mo3N,00Cr21Ni2Mn5N and 00Cr25Ni7Mo4N as research materials,hot ductility characteristic of DSS was studied and microstructure evolution during hot compression was *** results show that the optimum hot ductility temperature range of DSS is 1 050~1 200℃.00Cr25Ni7Mc4N exhibits the worst hot ductility and 00Cr21Ni2Mn5N has similar hot ductility to *** hot compression,austenite of DSS mainly occurs dynamic recovery,the ferrite of 00Cr22Ni5Mo3N,00Cr21Ni2Mn5N can perform dynamic recovery and recrystallization,but only dynamic recovery can be observed in the ferrite of 00Cr25Ni7Mo4N.

关键词： DSS hot ductility hot deformation microstructure observation

Simulation and verification of core–shell MC carbide design in Fe–C–Ni–V–Ti steel

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Journal of Iron and Steel Research International 2021年第1期28卷 58-65页

作者： Chen‑chong Wang Chun‑guang Shen Zhen Zhang Wei Xu State Key Laboratory of Rolling and Automation School of Materials Science and EngineeringNortheastern UniversityShenyang 110819LiaoningChina

Thermodynamic theory was used to calculate the formation temperature and site fraction of MC carbides in Fe–C–Ni–V–Ti *** calculation results showed the theoretical formation conditions of core–shell MC ***-step and two-step heat treatment processes were used in Fe–C–Ni–V–Ti alloy to,respectively,obtain homogeneous and core–shell MC carbides,which was consistent with the thermodynamic calculation *** transmission electron microscopy observations showed that the core–shell MC carbide obtained by the two-step heat treatment process contained homogeneous(Ti,V)C as the core and basically VC as the *** mechanical test results proved that compared with homogeneous MC carbides,core–shell MC carbides could improve the basic mechanical properties of the alloy because VC shell greatly increased the bonding strength and separation work of Fe/MC ***,the core–shell MC carbide with a VC shell structure can be a better grain refiner and can be used in steels with a high standard of fracture toughness.

关键词： Core–shell carbide Thermodynamic calculation microstructure observation Grain refiner Mechanical

Turbulent dissipation and mixing in Prydz Bay

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维普期刊数据库

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Chinese Journal of Oceanology and Limnology 2013年第2期31卷 445-453页

作者：杨庆轩田纪伟赵玮谢玲玲 Physical Oceanography Laboratory Ocean University of China outh China Sea Environmental Institute Guangdong Ocean University

In this paper, we present measurements of velocity, temperature, salinity, and turbulence collected in Prydz Bay, Antarctica, during February, 2005. The dissipation rates of turbulent kinetic energy （e） and diapycnal diffusivities （Ks） were estimated along a section in front of the Amery Ice Shelf. The dissipation rates and diapycnal diffusivities were spatially non-uniform, with higher values found in the western half of the section where E reached 10.7 W/kg and Kz reached 10.2 mVs, about two and three orders of magnitude higher than those in the open ocean, respectively. In the western half of the section both the dissipation rates and diffusivities showed a high-low-high vertical structure. This vertical structure may have been determined by internal waves in the upper layer, where the ice shelf draft acts as a possible energy source, and by bottom-generated internal waves in the lower layer, where both tides and geostrophic currents are possible energy sources. The intense diapycnal mixing revealed in our observations could contribute to the production of Antarctic Bottom Water in Prydz Bay.

关键词： turbulent mixing Prydz Bay Antarctic Bottom Water (AABW) microstructure observation

Preparation of Dashanzha Wan by three-dimensional printing

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Journal of Traditional Chinese Medical Sciences 2023年第1期10卷 52-57页

作者： Fengyuan Qin Zifan Ding Cong Yan School of Life Science Beijing University of Chinese MedicineBeijing 102488China

Objective:To use three-dimensional(3D)printing technology to prepare Dashanzha ***:The standard formula proportion of Dashanzha Wan was used to prepare printable materials(normally called the ink)for 3D printing,and different doses and shapes of Dashanzha Wan were ***,the rheological properties,texture characteristics,scanning electron microscopy,and content of ursolic acid were ***:Dashanzha Wan ink showed good shear thinning properties,which is very suitable for 3D *** printed sample had a beautiful and regular shape with high ***,ursolic acid content in 3D-printed Dashanzha Wan aligned with the ursolic acid content shown in the Pharmacopoeia of the People's Republic of China ***:The 3D-printed Dashanzha Wan has a better texture,and can be shaped into various shapes according to individual needs,which would increase patients’interest when taking ***,3D printing of Dashanzha Wan could be easily integrated into the digital life system,enabling online customization or use at *** study reveals that 3D printing technology is a promising method for the production of traditional Chinese medicine with personalized appearance,dosage,and texture,which is suitable for a broader population.

关键词： Three-dimensional printing Dashanzha Wan Customized appearance Rheological properties Textural analysis microstructure observation Ursolic acid Preparation process