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Changes of Tempering Microstructure and Properties of Fe-Cr-V-Ni-Mn-C Cast Alloys

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材料热处理学报 2004年第5期25卷 631-634页

作者： liuyan-xia MAYong-qing WANGYue-hua ZHANGZhan-ping ZHANGYang InstituteofMaterialsandTechnology DalianMaritimeUniversityDalianChina／DepartmentofPhysicsLiaoningUniversityShenyangChina InstituteofMaterialsandTechnology DalianMaritimeUniversityDalianChina DepartmentofPhysics LiaoningUniversityShenyangChina

The changes of tempering microstructure and properties of Fe-Cr-V-Ni-Mn-C cast alloys with martensite matrix and much retained austenite are studied. The results showed that when tempering at 200 °C the amount of retained austenite in the alloys is so much that is nearly to as-cast, and a lot of retained austenite decomposes when tempering at 350°C and the retained austenite decomposes almost until tempering at 560 °C. When tempering at 600 °C, the retained austenite in the alloys all decomposes. At 560°C the hardness is highest due to secondary hardening. The effect of nickel and manganese on the microstructure and properties of Fe-Cr-V-C cast alloy were also studied. The results show that the Fe-Cr-V-C cast alloy added nickel and manganese can obtain martensite matrix and much retained austenite microstructure, and nickel can also prevent pearlite transformation. With the increasing content of nickel and manganese, the hardness of as-cast alloy will decreases gradually, so one can improve the hardness of alloy by tempering process. When the content of nickel and manganese is 1.3-1.7%, the hardness of secondary hardening is the highest (HRC64). But when the content of nickel and manganese increase continually, the hardness of secondary hardening is low slightly, and the tempering temperature of secondary hardening rises.

关键词： Fe-Cr-V-Ni-Mn-C合金显微结构调温过程热处理

High Carbon Alloy Steels with Multiple Types of Ultra-fine Carbides and Their Characteristics

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材料热处理学报 2004年第5期25卷 117-121页

作者： MAYong-qing GAOHong-tao QIYu-hong ZHANGZhan-Ping DAIYu-mei liuyan-xia DalianMaritimeUniversity DalianChina

Under normal forging and annealing conditions, there are different ultra fine carbides (M3C, M23C6, M7Cj, M6C and MC) in high carbon alloy steels when alloy composition design is carried out properly. On the basis of carbides transformation orderliness, the alloy composition design of the high carbon alloy steels is conducted by phase-equilibrium thermodynamic calculation for Fe-Cr-W-Mo-V-C system. The nucleation and growth of new carbides, dissolution of previous partial carbides in these steels during annealing process, all these lead to ultra-fine distribution of carbides. Due to different crystal structures of carbides and different thermodynamics as well dynamics parameters of the carbides dissolution and precipitation, the range of quenching temperature of these steels is widened, and the good temper-resistance is obtained. The characteristics of heat treatment process and microstructure variance, and the carbides transformation for different temperature are explained by the phase-equilibrium component satisfactorily. Their bend and yield strength, flexibility and toughness all are advanced markedly comparing with that of kindred steels. Results of the applications have proved that the microstructure of ultra-fine carbides in these steels played importance roles in the enhancement of edginess and fatigue crack resistance of the die and knives.

关键词：超细硬质合金高碳钢结构设计成分设计

Microstructures and Hardness of 8CrWMoV Steel with Multiple Types of Ultra Fine Carbides

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材料热处理学报 2004年第5期25卷 279-283页

作者： DAIYu-mei ZHANGZhan-ping MAYong-qing QIYu-hong liuyan-xia YUTao Instituteofmaterialsandtechnology DalianMaritimeUniversityDalian116026

The structure and hardness of 8CrWMoV steel with multiple types of ultra fine carbides are studied after annealing, quenching and tempering in this paper. The results show that multiple types of carbides M3C, M7C3, M23C6, M6C and MC were observed in the annealed steel. Nucleation and coalescence of new carbides, partial dissolution of original carbides in γ phase region during annealing at 800～840℃, result in ultra-fine carbides. Average size of the carbides is0.33～0.34μm in the steel annealed at 800～840℃. Because M3C and M23C6 dissolve easily in austenite, the high hardness HRC63～65 can be obtained by quenching at 840～860℃. Un-dissolved carbides M6C and MC (VC) can effectively prevent the coarsening of austenitic grain, and conduce to obtain very fine martensite. The retained austenite can be easy to decompose during tempering at low and middle temperature due to the precipitation of multiple types of carbides and the good tempering-resistance of the steel is obtained. The microstructure and property of the steel after heat treatment can be accurately explained by calculating based on phase equilibrium *** Words: 8CrWMoV steel, ultra-fine carbide, heat treatment, microstructure,

关键词：显微结构 8CrWMoV钢超细硬质合金硬度热处理

24小时无人值守自助图书馆系统集成方案浅析

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无线互联科技 2019年第1期16卷 57-58页

作者：夏浏艳中共河南省信阳市新县县委党校河南新县465550

24小时无人值守图书馆是可以进行休闲阅读、自助借阅归还、饮品自助买卖、小憩与交流活动的小型图书馆,主要分布在公共场所、社区中心等人流集中,人口密度大的地方,属于现代图书馆的延伸,是提升广大市民精神生活的科技手段。文章浅析了2... 详细信息

24小时无人值守图书馆是可以进行休闲阅读、自助借阅归还、饮品自助买卖、小憩与交流活动的小型图书馆,主要分布在公共场所、社区中心等人流集中,人口密度大的地方,属于现代图书馆的延伸,是提升广大市民精神生活的科技手段。文章浅析了24小时无人值守自助图书馆系统集成方案。

关键词：无人值守自助图书馆集成

回归再时效热处理对7046铝合金显微组织与性能的影响

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特种铸造及有色合金 2024年第3期44卷 386-391页

作者：黎凡夫夏鹏陈斌项胜前朱世安张留艳李润霞广东工业大学材料与能源学院广州510000 东莞理工学院材料科学与工程学院东莞523808 广东豪美新材股份有限公司清远511500

采用室温拉伸试验、极化曲线测试、透射电镜(TEM)等分析方法,研究了回归再时效(RRA)热处理过程中回归温度、回归时间对7046铝合金组织和性能的影响。结果表明,适当的RRA工艺可使合金具有良好的耐腐蚀性能,强度上也不低于T6态合金。经12... 详细信息

采用室温拉伸试验、极化曲线测试、透射电镜(TEM)等分析方法,研究了回归再时效(RRA)热处理过程中回归温度、回归时间对7046铝合金组织和性能的影响。结果表明,适当的RRA工艺可使合金具有良好的耐腐蚀性能,强度上也不低于T6态合金。经120℃×24 h预时效+180℃×15 min回归+120℃×24 h再时效的RRA工艺处理后,合金综合力学性能达到最优,抗拉强度、屈服强度分别为490.3 MPa、467.8 MPa,高于T6态的487.1 MPa、452.7 MPa;同时耐腐蚀性能也有了显著的提升,自腐蚀电流密度为8.616×10^(-7)A/cm^(2),为T6态的18.9%。

关键词： 7046铝合金回归再时效显微组织力学性能耐腐蚀性能

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牛奶加工混料过程中的PLC控制

软件 2011年第4期32卷 42-44页

作者：刘延霞赵世杰中国矿业大学信息与电气工程学院徐州221116

本文主要针对牛奶加工过程中的配料环节,采用PLC结合液位传感器和辅料精准计量装置严格按照配方执行,保证牛奶的品质和口味。该系统由传感器及变送器、PLC控制系统、人机界面就地显示仪表、气动开关阀等设备组成,实现计量、控制和管理... 详细信息

本文主要针对牛奶加工过程中的配料环节,采用PLC结合液位传感器和辅料精准计量装置严格按照配方执行,保证牛奶的品质和口味。该系统由传感器及变送器、PLC控制系统、人机界面就地显示仪表、气动开关阀等设备组成,实现计量、控制和管理的高度统一,有效地解决了以往人工操作时劳动强度大、且存在较大的计量误差,产品合格率不高且不稳定的问题。

关键词：牛奶加工混料 PLC控制

新型镍配合物中性载体高选择性水杨酸根离子电极的研究

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分析测试学报 2005年第1期24卷 68-72页

作者：戴建远柴雅琴袁若钟霞刘颜唐点平西南师范大学化学化工学院分析科学研究所重庆400715

首次研究了基于苯甲醛丙氨酸合镍(Ⅱ)金属配合物[Ni(Ⅱ) -BBAA]为中性载体的PVC膜电极。该电极对水杨酸根(Sal -)具有优良的电位响应性能和选择性并呈现出反Hofmeister选择性行为 ,其选择性次序为Sal->ClO-4>SCN->I-> -2NO> 3-NO>Br->Cl... 详细信息

首次研究了基于苯甲醛丙氨酸合镍(Ⅱ)金属配合物[Ni(Ⅱ) -BBAA]为中性载体的PVC膜电极。该电极对水杨酸根(Sal -)具有优良的电位响应性能和选择性并呈现出反Hofmeister选择性行为 ,其选择性次序为Sal->ClO-4>SCN->I-> -2NO> 3-NO>Br->Cl->SO32- >SO42-。在pH5.0的磷酸盐缓冲体系中 ,电极电位呈现近能斯特响应 ,线性响应范围为2.2×10 -5～1.0×10 -1mol/L,斜率为 -55.8mV/dec(20℃) ,检出限为8.0×10-6 mol/L。采用交流阻抗技术和紫外可见光谱技术研究了电极的响应机理 ,结果表明配合物中心金属原子的结构以及载体本身的结构与电极的响应行为之间有非常密切的构效关系。该电极具有响应快、重现性好、检出限低、制备简单等优点。将电极用于药品分析。

关键词：苯甲醛丙氨酸合镍(Ⅱ) 中性载体水杨酸根离子选择性电极

Research on port ecological suitability evaluation index system and evaluation model

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Frontiers of Structural and Civil Engineering 2015年第1期9卷 65-70页

作者： Yaofeng XIE xia LV Ru LIU liuyan MAO xiaoxi LIU Department of Harbor and Waterway Engineering Southeast University Nanjing 210096 China Guangdong Institute of Technology Guangzhou 510800 China

Along with the rapid development of port building, the negative impacts of port＇s construction and operation on the coastline ecosystem are also increasingly strong. Therefore, it＇s urgent to establish a scientific and complete system of port ecological suitability evaluation. This paper pointed out the characteristics of port ecological effects and the principles of selecting evaluation index, and used the ＂pressure-state-response （PSR）＂ model to analysis the various pressures on the environment caused by port construction and operation, and the system＇s response. On this basis, we constructed the port ecological suitability evaluation index. This model used the combination of qualitative and quantitative analytic hierarchy process, to meet the multi-level, multi-objective characteristics of evaluation index system. The evaluation index system and evaluation model can be used to analysis the ecological suitability of port projects comprehensively and have some guiding significance to the port ecological suitability evaluation.

关键词： port ecological suitability press-state-response (PSR) model evaluation index system

Fang-xia-Dihuang decoction inhibits breast cancer progression induced by psychological stress via down-regulation of PI3K/AKT and JAK2/STAT3 pathways:An in vivo and a network pharmacology assessment

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生物细胞(英文) 2023年第9期47卷 1977-1994页

作者： LINGYAN LV JING ZHAO XUAN WANG liuyan XU YINGYI FAN CHUNHUI WANG HONGQIAO FAN xiaOHUA PEI School of Graduate Beijing University of Chinese MedicineBeijing100029China Department of Breast Beijing University of Chinese Medicine Third Affiliated HospitalBeijing100029China Department of Pharmacy Fangshan Hospital of Beijing University of Chinese MedicineBeijing102488China Department of Breast The First Hospital of Hunan University of Chinese MedicineChangsha410007China Department of Chest and Breast The Xiamen Hospital of Beijing Universality of Chinese MedicineXiamen361001China

Background:The development and prognosis of breast cancer are intricately linked to psychological *** addition,depression is the most common psychological comorbidity among breast cancer survivors,and reportedly,Fang-xia-Dihuang decoction(FXDH)can effectively manage depression in such ***,its pharmacological and molecular mechanisms remain ***:Public databases were used for obtaining active components and related *** active components were further verified by ultra-high-performance liquid chromatography-high-resolution mass spectrometry(UPLC-HRMS).Protein–protein interaction and enrichment analyses were taken to predict potential hub targets and related *** docking was used to understand the interactions between main compounds and hub *** addition,an animal model of breast cancer combined with depression was established to evaluate the intervention effect of FXDH and verify the pathways screened by network ***:174 active components of FXDH and 163 intersection targets of FXDH,breast cancer,and depression were ***,methyl ferulate,luteolin,ferulaldehyde,wogonin,and diincarvilone were identified as the principal active components of ***–protein interaction and KEGG enrichment analyses revealed that the phosphoinositide-3-kinase–protein kinase B(PI3K/AKT)and Janus kinase/signal transducer and activator of transcription(JAK2/STAT3)signaling pathways played a crucial role in mediating the efficacy of FXDH for inhibiting breast cancer progression induced by *** addition,in vivo experiments revealed that FXDH ameliorated depression-like behavior in mice and inhibited excessive tumor growth in mice with breast cancer and *** treatment downregulated the expression of epinephrine,PI3K,AKT,STAT3,and JAK2 compared with the control treatment(p<0.05).Molecular docking verified the relationship between the six primary components of FXDH and the three most im

关键词： Fang-xia-Dihuang decoction Breast cancer Psychological stress Depression Network pharmacology PI3K/AKT JAK2/STAT3