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Effects of Technological Parameters on microstructures and properties of Low Cost Hot Rolled Dual-Phase Steel on CSP Line

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Journal of Iron and Steel Research International 2011年第S1期18卷 615-620页

作者： DONG Rui-feng 1,2,LI De-gang 1,2,YAN Bo 2,WANG Guo-dong 1 (1.The State Key Lab of Rolling and Automation,Northeastern University,Shenyang 110004,China 2.Baotou Iron and Steel (Group) Co Ltd,Compact Strip Production Plant,Baotou 014010,China) Northeastern Univ State Key Lab Rolling & Automat Shenyang 110004 Peoples R China Baotou Iron & Steel Grp Co Ltd Compact Strip Prod Plant Baotou 014010 Peoples R China

The effects of technological parameters on microstructures and properties of low cost hot rolled dual-phase steel was researched by design different finish rolling temperature,mid cooling temperature between laminar cooling and UFC (ultra fast cooling) and stable UFC rate on the same gauge strips with the same chemistry composition during the manufacture *** is the key for controlling coil temperature to control finish rolling temperature and mid cooling temperature between laminar cooling and UFC that based on stable UFC rate *** lower finish rolling temperature,with mid cooling temperature between laminar cooling and UFC,the better to form martensite *** foundation of developing the similar productions on the similar product line was *** is good to technological advancement of developing high affixation value production as hot rolled DP steel,TRIP steel *** CSP line.

关键词： finish rolling temperature mid cooling temperature between laminar cooling and UFC hot rolled dual-phase steel microstructures and properties

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Production,properties and microstructures of Mg-RE-Zn-Zr(RE=MM,Nd) Alloy

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Journal of Materials Science & Technology 2002年第4期18卷 378-380页

作者： Kun YU, Wenxian LI and Songrui LICollege of Materials Science and Engineering, Central South University, Changsha 410083, China Coll. of Mat. Sci. and Eng. Central South Univ. Changsha 410083 China

The Mg-MM and Mg-Nd master alloys were prepared through the ingot metallurgy method under the protection of a special flux. The thermodynamic behaviors of different rare earth elements in the molten Mg alloys were investigated. Two experimental alloys, Mg-3.0 wt pct MM-0.7 wt pct Zn-0.7 wt pct Zr and Mg-2.8 wt pct Nd-0.7 wt pct Zn-0.7 wt pct Zr, were prepared. The hardness and tensile properties of experimental alloys were measured and the microstructures were observed. The results showed that the rare earth elements could react greatly with the Mg chloride in the flux. The Mg-Nd-Zn-Zr alloy displayed a good aging hardening effect. The dispersed metastable phase ? (Mg3Nd) is an important strengthening phase to improve the tensile properties of this alloy. So the Mg-Nd-Zn-Zr alloy has better tensile properties and elongation than those of the Mg-MM-Zn-Zr alloy, and the ductile fracture character could be observed. The microvoid coalescence is the dominant fracture mechanism in this alloy.

关键词： Mg-RE-Zn-Zr alloy Rare earth microstructures and properties

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Preparation and characterization of organic pigments and their fluorescence properties depending on bulk structure

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Journal of Materials Science & Technology 2018年第11期34卷 2218-2224页

作者： Jie Du Rong Yang Changqing Fang Xing Zhou Shaofei Pan Wanqing Lei Jian Su Youliang Cheng Donghong Liu School of Mechanical and Precision Instrument Engineering Xi'an University of Technology Faculty of Printing Packaging Engineering and Digital Media TechnologyXi'an University of Technology Fuli Institute of Food Science Zhejiang University School of Materails Science and Engineering Xi'an University of Technology

Fluorescent pigments, based on the optical or electrooptical properties of dyes, are the main component in fluorescent coatings and inks. In this study, three kinds of dyes（Rhodamine B, Light Green SF Yellowish, Coumarin） with four different ratios（2.5 wt%, 3 wt%, 3.5 wt%, 4 wt%） were employed as luminophor,and the melamine-formaldehyde（MF） resin was used as curing resin to prepare fluorescent pigments in different color. Fourier transform infrared spectroscopy and X-ray diffractometry were carried out to analyze the structure of the fluorescent pigments. Scanning electron microscopy and particle size distribution were used to present the morphology of fluorescent pigments. UV–vis and fluorescence spectrum were used to demonstrate the optical properties. It can be concluded that, coumarin pigments possessed consecutive structure in MF resin while rhodamine B might be the best for the preparation of printing inks among the three kinds of dyes from the view of particle size. The TG results presented that all the pigments showed good thermal stability, which might possess potential application in high speed printing industry.

关键词： Fluorescein microstructures and properties Optical properties Thermal properties

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microstructures and Tensile Deformation Behavior of a Cryogenic-rolled Mn-Al TRIP Steel

Microstructures and Tensile Deformation Behavior of a Cryoge...

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“第十届中国钢铁年会”暨“第六届宝钢学术年会”

作者： Hu Zhiping Xu Yunbo Tan Xiaodong Yang Xiaolong Peng Fei Yu Yongmei Liu Hui Wang Le The State Key Laboratory of Rolling and Automation Northeastern University School of Mechanical Engineering Shenyang University of chemical technologyShenyang Economical & Technological Development Zone Research Institute of Iron and Steel of Shandong Iron and Steel Group

In this work,acryogenic rolling process was appliedto a 3Mn-1.5Al TRIP *** characterization was carried out by means of optical microscope,scanning electron microscope（SEM）equipped with electron probe microanalysis（EPMA）and transmission electron microscope（TEM）.Mechanical properties were obtained by uniaxial tension *** microstructure characterization results show that the steel presents a complex microstructure composed of three phases（ferrite,martensite and retained austenite）.The volume fractions of austenite before and after a deformation were determined by X-ray diffraction（XRD）.The XRD results indicate that the amount of retained austenite reaches up to18vol%and the TRIP effect occurs quite apparently in the specimen with optimizingintercritical annealing temperature of730°*** mechanical properties results displays that the tested steel presentsadequateultimate tensile strength of 916MPa and excellent elongation of 30%in the optimal intercriticalannealing *** retained austenite strain hardening behavior（continuous TRIP effect）is observed in the *** outstanding combination of strength and ductility with the product of strength and elongation（PSE）reaching up to 27GPa%around indicates that the steel has a bright application prospect.

关键词： cryogenic rolling Mn-Al TRIP steel microstructures and properties retained austenite

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