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Effect of Mo content on the thermal stability of Ti-Mo-bearing ferritic steel

International Journal of Minerals,Metallurgy and Materials 2021年第3期28卷 412-421页

作者： Yao Huang Wei-ning Liu Ai-min Zhao Jun-ke Han Zhi-gang Wang hong-xiang yin China Electric Power Research Institute Beijing 100192China Institute of Engineering Technology University of Science and Technology BeijingBeijing 100083China State Grid Corporation Beijing 100031China Faculty of Materials Metallurgy and Chemistry Jiangxi University of Science and TechnologyGanzhou 341000China Metal and Chemistry Research Institute China Academy of Railway Sciences Corporation LimitedBeijing 100081China

The effects of tempering holding time at 700℃on the morphology,mechanical properties,and behavior of nanoparticles in Ti-Mo ferritic steel with different Mo contents were analyzed using scanning electron microscopy and transmission electron *** equilibrium solid solution amounts of Mo,Ti,and C in ferritic steel at various temperatures were calculated,and changes in the sizes of nanoparticles over time at different Mo contents were *** experimental results and theoretical calculations were in good agreement with each other and showed that the size of nanoparticles in middle Mo content nano-ferrite(MNF)steel changed the least during *** Mo contents inhibited the maturation and growth of nanoparticles,but no obvious inhibitory effect was observed when the Mo content exceeded 0.37wt%.The tensile strength and yield strength continuously decreased with the tempering *** of the strengthening and toughening mechanisms showed that the different mechanical properties among the three different Mo content experiment steels were mainly determined by grain refinement strengthening(the difference range was 30-40 MPa)and precipitation strengthening(the difference range was 78-127 MPa).MNF steel displayed an ideal chemical ratio and the highest thermodynamic stability,whereas low Mo content nano-ferrite(LNF)steel and high Mo content nano-ferrite(HNF)steel displayed relatively similar thermodynamic stabilities.

关键词： ferritic steel nanoparticles interphase precipitation thermal stability ostwald ripening rate

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Effect of Annealing Process on Microstructure and Mechanical Property of 1100 MPa Grade TRIP Steel

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Journal of Iron and Steel Research International 2015年第7期22卷 622-629页

作者： hong-xiang yin Zheng-zhi ZHAO Ai-min ZHAO Xiao LI Han-jiang HU Jiang-tao LIANG Metallurgical Engineering Research Institute University of Science and Technology Beijing Beijing Laboratory of Metallic Materials and Processing for Modern Transportation

To develop super-high strength TRIP steel for automobile application with good combination of strength and plasticity, an ultra high-strength TRIP steel 0.2 %C-2.0% Si-1.8% Mn was investigated at different intercritical annealing temperatures and bainitic isothermal temperatures. Microstructures were observed by scanning electron mi- croscopy, transmission electron microscopy, electron backscatter diffraction, and X-ray diffraction, and mechanical properties were tested under a uniaxial tensile testing machine. It shows that the best comprehensive mechanical properties were obtained for the experimental steel particularly annealed at 820 ℃ and austempered at 410 ℃. Yield strength of the tested steel mainly depends on ferrite, while the high strength of the tested steel is related to mar- tensite which forms through blocky austenite transformation during cooling and subsequent tensile test attributed to the TRIP effect. Hence, it could be concluded that the grain size of the retained austenite and carbon content in re- tained austenite are the main reasons for high elongation of the tested steel.

关键词： TRIP steel retained austenite intercritical annealing bainitic isothermal temperature automobile steel

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Influence of original microstructure on the transformation behavior and mechanical properties of ultra-high-strength TRIP-aided steel

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International Journal of Minerals,Metallurgy and Materials 2015年第3期22卷 262-271页

作者： hong-xiang yin Ai-min Zhao Zheng-zhi Zhao Xiao Li Shuang-jiao Li Han-jiang Hu Wei-guang Xia Metallurgical Engineering Research Institute University of Science and Technology Beijing Beijing Laboratory of Metallic Materials and Processing for Modern Transportation Key Laboratory for Mechanics in Fluid Solid Coupling Systems Institute of Mechanics Chinese Academy of Sciences

The transformation behavior and tensile properties of an ultra-high-strength transformation-induced plasticity （TRIP） steel （***） were investigated by different heat treatments for automobile applications. The results show that F-TRIP steel, a tradi- tional TRIP steel containing as-cold-rolled ferfite and pearlite as the original microstructure, consists of equiaxed grains of intercritical ferrite surrounded by discrete particles of M/RA and B. In contrast, M-TRIP steel, a modified TRiP-aided steel with martensite as the original mi- crostlucture, containing full martensite as the original microstructure is comprised of lath-shaped grains of ferrite separated by lath-shaped martensite/retained austenite and bainite. Most of the austenite in F-TRIP steel is granular, while the austenite in M-TRIP steel is lath-shaped. The volume fraction of the retained austenite as well as its carbon content is lower in F-TRIP steel than in M-TRIP steel, and austenite grains in M-TRIP steel are much finer than those in F-TRIP steel. Therefore, M-TRIP steel was concluded to have a higher austenite stability, re- sulting in a lower transformation rate and consequently contributing to a higher elongation compared to F-TRIP steel. Work hardening be- havior is also discussed for both types of steel.

关键词： high strength steels transformation-induced plasticity phase transformations mechanical properties original microstructure work hardening

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Investigation of bubbles escape behavior from low basicity mold flux for high-Mn high-Al steels using 3D X-ray microscope

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International Journal of Minerals,Metallurgy and Materials 2025年第1期32卷 102-110页

作者： Qiang Liu xiang Li Shen Du Ming Gao Yanbin yin Jiongming Zhang State Key Laboratory of Advanced Metallurgy University of Science and Technology BeijingBeijing 100083China

During the continuous casting process of high-Mn high-Al steels,various types of gases such as Ar need to escape through the top of the *** which,the behavior of bubbles traversing the liquid slag serves as a restrictive link,closely associated with viscosity and the thickness of liquid *** contrast to two-dimensional surface observation,three-dimensional(3D)analysis method can offer a more intuitive,accurate,and comprehensive ***,this study employs a 3D X-ray microscope(3D-XRM)to obtained spatial distribution and 3D morphological characteristics of residual bubbles in mold flux under different basicity of liquid slag,different temperatures,and different holding *** results indicate that as basicity of slag increases from 0.52 to 1.03,temperature increases from 1423 to 1573 K,the viscosity of slag decreases,the floating rate of bubbles *** addition,when holding time increases from 10 to 30 s,the bubbles floating distance increases,and the volume fraction and average equivalent sphere diameter of the bubbles solidified in the mold flux gradually *** one word,increasing the basicity,temperature,and holding time leading to an increase in the removal rate of bubbles especially for the *** findings of bubbles escape behavior provide valuable insights into optimizing low basicity mold flux for high-Mn high-Al steels.

关键词： mold flux low basicity bubbles three-dimensional X-ray microscope viscosity

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水性涂料用铝粉颜料的改性

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电镀与涂饰 2013年第2期32卷 62-66页

作者：向红印深圳市中金岭南科技有限公司广东深圳518122

分别以KH-550、丙烯酸树脂和两者的混合物对铝粉表面进行包覆改性,研究了不同包覆铝粉的耐酸性能,结果发现,以KH-550/丙烯酸树脂共同包覆的铝粉具有更好的耐酸性能。红外光谱(FT-IR)和X射线光电子能谱(XPS)分析表明,KH-550和丙烯酸树脂... 详细信息

分别以KH-550、丙烯酸树脂和两者的混合物对铝粉表面进行包覆改性,研究了不同包覆铝粉的耐酸性能,结果发现,以KH-550/丙烯酸树脂共同包覆的铝粉具有更好的耐酸性能。红外光谱(FT-IR)和X射线光电子能谱(XPS)分析表明,KH-550和丙烯酸树脂通过共聚反应在铝粉表面形成了保护膜。以此改性铝粉制备水性铝颜料,通过扫描电镜(SEM)和能谱仪(EDS)对其进行了表征,发现铝粉颜料呈片状,氧含量低(5.17%),具有较好的金属光泽。将此铝颜料用于水性无铬锌基涂料,所制备的涂料具有良好的金属光泽和耐腐蚀性。

关键词：水性涂料铝粉改性硅烷丙烯酸树脂无铬

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南宋理学与书院教育宗旨

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湖南大学学报（社会科学版） 2016年第2期30卷 17-25页

作者：洪银香朱汉民湖南大学岳麓书院湖南长沙410082

南宋时期,理学和书院呈现一体化发展趋势。理学家倡导复兴儒学、以儒家明体达用、内圣外王作为书院教育宗旨,推动了南宋书院的发展,为书院成为相对独立的教育体系奠定了思想基础。

关键词：书院教育明体达用圣贤之学经世致用

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Role of NO in vPAG of stress-induced hypertensive rats

Role of NO in vPAG of stress-induced hypertensive rats

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中国生理学会第21届全国代表大会暨学术会议

作者： Li Li, hong Xue, yin-xiang Cao, Da-Nian Zhu ( Department of Physiology, Medical Center of Fudan University, Shanghai 200032)

＜正＞ Experiments were performed on stress-induced hypertensive rats anesthetized with urethane andchloralose. The ECG, blood pressure （BP）, cardiac functions: PEAK, end diastolic pressure（EDP）, ±dp/dt were recorded synchronously. Microinjection of saline into the ventral periaqueductal gray matter （vPAG） caused no signifi-cant change of the above parameters. While microinjection of L-Arginine resulted in a decrease in

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一种新型雷达模拟器的设计与实现

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舰船科学技术 2017年第1期39卷 122-126,136页

作者：李业任鸿翔尹金岗大连海事大学航海动态仿真和控制交通行业重点实验室辽宁大连116026 中国海事服务中心北京100029

针对现有雷达模拟器操作界面老旧、功能单一、发展速度落后于真机等现状,为满足雷达操作培训需要,开发了一款新型雷达模拟器。通过分析雷达模拟器组成和功能设计要求,决定采取模块化思想对雷达模拟器进行分模块开发。对雷达模拟器涉及... 详细信息

针对现有雷达模拟器操作界面老旧、功能单一、发展速度落后于真机等现状,为满足雷达操作培训需要,开发了一款新型雷达模拟器。通过分析雷达模拟器组成和功能设计要求,决定采取模块化思想对雷达模拟器进行分模块开发。对雷达模拟器涉及的部分关键技术进行了改进,并提出了一些新方法。借助于WPF开发框架和C#语言完成了模拟器的设计与实现。仿真结果表明,该模拟器即能满足一般雷达模拟器性能标准,又实现了对现有真机部分新型实用功能的仿真。

关键词：航海雷达雷达模拟器模块化关键技术

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基于IEC 61850的SVG应用

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继电器 2006年第14期34卷 46-49,57页

作者：高会生项洪印刘广华北电力大学电子与通信工程系河北保定071003

对基于IEC 61850标准的变电站自动化通信网络的SVG(可扩展矢量图形)应用进行了分析。提出IEC61850语义空间的SVG扩充应用,使用SCL(变电站配置语言)模型的XML(可扩展标记语言)语言作为描述工具,阐述了网络环境下SVG的动态生成技术,并介... 详细信息

对基于IEC 61850标准的变电站自动化通信网络的SVG(可扩展矢量图形)应用进行了分析。提出IEC61850语义空间的SVG扩充应用,使用SCL(变电站配置语言)模型的XML(可扩展标记语言)语言作为描述工具,阐述了网络环境下SVG的动态生成技术,并介绍了其在.NET平台上的实现,对IEC 61850的开发应用具有一定的推动作用。

关键词： IEC 61850 SVG XML

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Central effects of hydrogen sulfide on blood pressure in spontaneously hypertensive rat

Central effects of hydrogen sulfide on blood pressure in spo...

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中国生理学会第23届全国会员代表大会暨生理学学术大会

作者： Hai-Yun YU,hong MA,yin-xiang CAO,Rui WANG,Yi-Chun ZHU,Ning LU~* Department of Physiology and Pathophysiology,Shanghai Medical College,Fudan University,Shanghai 200032,China

Hydrogen sulfide(HS) was found to be produced endogenously in various parts of the body and may act as an endogenous signaling *** is formed from cysteine by cystathionine P-synthase(CBS),cystathionineγ-lyase(CSE),and mercaptopyruvate sulfurtransferase(MPST),and it is produced mainly by CBS in *** performs a wide range of physiological and pathological *** much less is known about its roles than about its two counterparts,NO and CO,it is currently considered to be the third gaseous mediator. However,the central cardiovascular effects of HS are not fully *** present study,we investigate the distribution of CBS in brain through immunohistochemistry and *** also explore the effects of HS on regulating central blood pressure by intracerebroventricular injection of NaHS,a HS donor,and the CBS activator, S-ademetionine(SAM).Experiments were completed in Wistar-Kyoto(WKY) rats and spontaneous hypertensive rats(SHR).The following observations were made:(1) Expressions of CBS of the rostral ventrolateral medulla (RVLM) were decreased in SHR rats compared with WKY rats.(2) Intracerebroventricular SAM(100μmol,10μL) significantly decreased mean arterial pressure(MAP).(3) Intracerebroventricular NaHS by low concentration (200-400μmol,10μL) significantly decreased mean arterial pressure(MAP),while high concentration(2 mmol, 10μL) could increase *** results indicate that HS produced by CBS in brain may regulate blood pressure.

关键词： hydrogen sulfide CBS central cardiovascular effects

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