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汽车高强钢簇状翘皮缺陷成因分析及控制

中国冶金 2024年第8期34卷 99-106页

作者：倪有金朱克然龚坚黄福祥亢小敏吴友谊王彦峰陈瑾北京首钢股份有限公司迁顺技术中心河北唐山064400 北京首钢股份有限公司制造部河北唐山064400 北京首钢股份有限公司炼钢作业部河北唐山064400

为了减少590 MPa级别汽车高强钢板表面簇状翘皮缺陷,对该缺陷的成因和机制进行了分析和调查。结果表明,该缺陷起源于铸坯上表面宽度1/4和3/4区域的皮下微裂纹,此类包晶高Nb钢和中高铝钢对裂纹较为敏感的主要原因是NbCN和AlN在矫直区温... 详细信息

为了减少590 MPa级别汽车高强钢板表面簇状翘皮缺陷,对该缺陷的成因和机制进行了分析和调查。结果表明,该缺陷起源于铸坯上表面宽度1/4和3/4区域的皮下微裂纹,此类包晶高Nb钢和中高铝钢对裂纹较为敏感的主要原因是NbCN和AlN在矫直区温度下大量析出造成晶界脆化,包晶钢凝固坯壳不均匀和高铝钢由于渣-钢变性反应导致的深振痕加大了应力集中和裂纹敏感性。结合钢种凝固特性,分别采取了控制钢水N元素质量分数不高于0.0040%、按w([Ti])/w([N])=4~5添加Ti、设计开发新型保护渣以及优化连铸工艺等措施,裂纹指数由12~20个/m降低到0.03~0.20个/m,簇状翘皮缺陷发生率由29.8%降低到0.5%以下。

关键词：高强钢簇状翘皮裂纹晶界脆化析出物深振痕

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圆筒型FPSO船体仪控托架布置方法研究

船电技术 2024年第7期44卷 50-52页

作者：陈忠革杨亮张伟刚窦富祥苏畅海洋石油工程股份有限公司天津300451

本文主要研究圆筒型FPSO船体典型仪控系统托架布置方法,介绍了圆筒型FPSO组成及船体控制系统架构、托架的类型、托架的规划,以及船体典型仪控系统托架的布置案例。本方法已在某圆筒型FPSO项目中成功实践,可以为其他项目提供参考和借鉴。

关键词：圆筒型FPSO 仪控托架控制系统

Rb-Sr Dating of Sulfides from the Huogeqi Copper-Lead-Zinc Polymetallic Deposit in Inner Mongolia

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Acta Geologica Sinica(English Edition) 2019年第4期93卷 1156-1157页

作者： chen Chao HU Huabin NIU Shuyin ZHANG fuxiang LI Liang BAI Xiaoxuan SU Baoqi CAO Yaqi TONG Huayu College of Resources Key Laboratory of Regional Geology and MineralizationHebei GEO UniversityShijiazhuang 050031China

Objective The Huogeqi copper-lead-zinc polymetallic deposit in Inner Mongolia is located in the western part of the Middle-Late Proterozoic Langshan rift trough situated on the northern border of North China Platform.

关键词： Huogeqi Mongolia Sr

Intermetallic IrGa-IrO_(x) core-shell electrocatalysts for oxygen evolution Hide Author's Information

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Nano Research 2022年第3期15卷 1853-1860页

作者： Lin-Wei chen fuxiang He Ru-Yang Shao Qiang-Qiang Yan Peng Yin Wei-Jie Zeng Ming Zuo Lixin He Hai-Wei Liang Division of Nanomaterials&Chemistry Hefei National Laboratory for Physical Sciences at the MicroscaleDepartment of ChemistryUniversity of Science and Technology of ChinaHefei 230026China School of Pharmacy Anhui University of Chinese MedicineHefei 230012China Key Laboratory of Quantum Information University of Science and Technology of ChinaHefei 230026China. Synergetic Innovation Center of Quantum Information and Quantum Physics University of Science and Technology of ChinaHefei 230026China

The development of high-performance Ir-based catalyst for electrocatalysis of oxygen evolution reaction(OER)in acidic media plays a critical role in realizing the commercialization of polymer electrolyte membrane-based water electrolyzer *** we report a low-Ir core–shell OER electrocatalyst consisting of an intermetallic IrGa(IrGa-IMC)core and a partially oxidized Ir(IrOx)*** acidic electrolytes,the IrGa-IMC@IrOx core–shell catalysts exhibit a low overpotential of 272 mV at 10 mA·cm^(−2) with Ir loading of~20µg·cm^(−2) and a mass activity of 841 A·gIr^(−1) at 1.52 V,which is 3.6 times greater than that of commercial Ir/C(232 A·gIr^(−1))*** understand by the density functional theory(DFT)calculations that the enhanced OER activity of the IrGa-IMC@IrO_(x) catalysts is ascribed to the lifted degeneracy of Ir 5d electron of surface IrO_(x) sites induced by the intermetallic IrGa core,which increases the adsorption capacity of IrO_(x) layer for O and OH binding and eventually lowers the energy barrier of the OER rate-determining steps.

关键词： IrGa intermetallics electrocatalysts oxygen evolution reaction core−shell

Effects of Pouring Temperature on Interfacial Reaction between Ti-47-5Al-2-5V-1Cr Alloy and Mold during Centrifugal Casting

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Journal of Wuhan University of Technology(Materials Science) 2016年第5期31卷 1105-1108页

作者：隋艳伟 FENG Kun chenG cheng chen Xiao 戚继球 HE Yezeng MENG Qingkun WEI fuxiang SUN Zhi School of Materials Science and Engineering China University of Mining and Technology Xuzhou 221116 China

Pouring temperature and time are the most important influencing factors on interfacial reaction during the centrifugal casting. When cast at high temperatures, the crucible becomes brittle and prone to cracking, and shows a low stability. In this paper, we studied the centrifugal casting of Ti-47.5-Al-2.5V-1Cr alloy, and explored the effects of pouring temperature on the interfacial reaction. Castings at 1 600, 1 650, and 1 700 ℃ were obtained by controlling the other parameters constant in the experiments. The microstructure, elemental distribution, thickness of the reaction layer and phase composition of the castings at the interface were studied. The results show that the thickness at the interfacial reaction layer is increased by raising the pouring temperature. The elements in the mold and the matrix were double-diffused and reacted at the interface during the casting process, and formed solid solutions with the precipitation of many new phases such as AlOand TiO. The roughness of interface structure and layer thickness of reaction increase with the rise of temperature, and the interfacial reaction is more intense. There is a minimum layer thickness of the reaction layer that is 80 μm when the temperature is 1 600 ℃.

关键词： TiAl alloy centrifugal casting interfacial reaction pouring temperature

Analysis of the ore-controlling role of Guojiadian mantle branch structure,Northwest Shandong Peninsula,China

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Chinese Journal Of Geochemistry 2012年第4期31卷 414-423页

作者： NIU Shuyin Sun Aiqun ZHANG Jianzhen MA Baojun WANG Baode chen Chao ZHANG fuxiang LIU cheng ZHANG Xiaofei College of Resources Shijiazhuang University of Economics Shijiazhuang 050031 China College of Earth Science and Resources China University ofGeosciences Beifing 100083 China

Metallogenesis in the gold ore-concentrated zone of Northwest Shandong Peninsula is closely related to deep *** region in the eastern part of North China entered into the stage of mantle plume evolution during the Yanshanian movement,following the long-time stage of stable platform evolution during Paleozoic *** that time,the ore-concentrated zone of Northwest Shandong Peninsula just entered into the development-evolution stage of the Laiyang sub-mantle plume and the Guojiadian mantle branch structure in its *** core-mantle-source gold was present in the gas-liquid form,and it migrated through mantle plume→sub-mantle plume→mantle branch structure→favorable tectonic expansion zone to the favorable loci of the mantle branch structure,where gold was deposited as ores,thereafter constituting a series of large-to medium-sized gold deposits distributed around the Guojiadian mantle branch *** study also dealt with the Jiaojia fault as the main detachment(fault altered rock) belt on the northwestern margin of the mantle branch structure and also presented a basic cognition about the fact that the Sanshandao fault as the listric fault on the hanging wall of the detachment ***,on this basis,this study also pointed out the orientation for further ore prospecting in this region.

关键词：分支结构山东半岛地幔柱中国北方西北部控矿作用演化阶段焦家断裂带

Tip-induced directional charge separation on one-dimensional BiVO4 nanocones for asymmetric light absorption

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Journal of Energy Chemistry 2022年第9期31卷 326-332,I0009页

作者： Nengcong Yang Ruotian chen chenwei Ni Dongfeng Li Qi Sun Lifang Liu Yu Qi Shengye Jin Xiuli Wang Fengtao Fan Can Li fuxiang Zhang State Key Laboratory of Catalysis Dalian Institute of Chemical PhysicsDalian National Laboratory for Clean EnergyChinese Academy of SciencesDalian 116023LiaoningChina State Key Laboratory of Molecular Reaction Dynamics and Dynamics Research Center for Energy and Environmental Materials Dalian Institute of Chemical PhysicsChinese Academy of SciencesDalian 116023LiaoningChina University of Chinese Academy of Sciences Beijing 100049China

One dimensional(1D)semiconductor is a class of extensively attractive materials for many emerging solar energy conversion ***,it is still of shortage to assess the impact of 1D structural symmetry on spatial charge separation and understand its underlying *** we take controllably-synthesized 1D BiVO_(4)nanocones and nanorods as prototypes to study the influence of 1D symmetry on charge *** is found that the asymmetric BiVO_(4)nanocones enable more effective charge separation compared with the symmetric *** unexpected spatial charge separation on the nanocones is mainly ascribed to uneven light absorption induced diffusion-controllable charge separation due to symmetry breaking of 1D nanostructure,as evidenced by spatial and temporal resolved ***,the promotion effect of charge separation on the nanocones was quantitatively evaluated to be over 20 times higher than that in BiVO_(4)*** work gives the first demonstration of the influence of 1D structural symmetry on the charge separation behavior,providing new insights to design and fabricate semiconductor materials for efficient solar energy conversion.

关键词： Charge separation Tip-enhanced light absorption Surface photovoltage BiVO4 Photocatalysis

Timing of mineralization at the Shihu gold deposit in the middle segment of the Taihang Mountain, China

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Acta Geochimica 2018年第1期37卷 80-89页

作者： Chao chen Shuyin Niu Fang Wang fuxiang Zhang Qinglian Zhang Baojun Ma Aiqun Sun Jianzhen Zhang Yaqi Cao Xiaoqing Zhang Hebei GEO University Shijiazhuang 050031 China

The Shihu gold deposit, located in the middlesouth section of the core of the Fuping mantle branch structure, is hosted in the Archean Fuping Group and adjacent to the quartz diorite porphyrite. The gold deposit is the only large gold deposit with reserves of more than 30 tons gold discovered in western Hebei Province so far. In order to constrain the timing of mineralization of this ore deposit, this paper focuses on the isotopic dating of zircon and pyrite. Zircons in gold-bearing quartz veins are magmatic in origin and no hydrothermal zircon has been found in such quartz veins, indicating that zircons were derived from the wall rocks. U–Pb ages of zircons fall mainly in the two domains: 2492 ± 82 and 136 ± 4 Ma, respectively,indicative of the contribution of the Fuping-Group TTG gneiss and Yanshanian igneous rocks, respectively. The Re–Os isotopic compositions of pyrites in the gold-bearing quartz veins yield an isochron age of 127 ± 31 Ma. Combined with other dating results, we suggest that the main metallogenic age of the Shihu gold deposit is 120–127 Ma.

关键词： Mantle branch structure Shihu gold deposit Zircon U–Pb dating Pyrite Re–Os dating Gold-bearing quartz vein

Borehole stability in naturally fractured reservoirs luring production tests

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Petroleum Science 2008年第3期5卷 247-250页

作者： Zhang fuxiang Zhang Shaoli Jiang Xuehai Lu Rende chen Mian Tarim Oil Field Company PetroChina Korla Xinjiang 834000 China PetroChina Company Limited Beijing 100011 China School of Petrnleuln Engineering China University of Petroleum Beijing 102249 China

Based on the plane of weakness theory, a model for predicting borehole stability in fractured reservoirs under different stress states was estiblisted and the equations for solving borehole stability were developed. The minimum downhole pressures required to maintain borehole stability under different natural fracture occurrences were calculated by using the data from a well in the Tazhong （central Tarim） area, Tarim Basin, west China. Several conclusions were drawn for naturally fractured reservoirs with a dip angle from less than 10° to greater than 30°. Application in three wells in the Tazhong area indicates that this model is practically useful.

关键词： Production test fractured reservoir borehole stability fracture dip azimuth of fracture