期刊文献+
共找到13篇文章
< 1 >
每页显示 20 50 100
装配式混凝土结构类钢结构化施工工艺研究
1
作者 赵良 《建筑技术开发》 2019年第24期18-19,共2页
装配式混凝土结构类钢结构化施工的实际开展,也逐渐暴露出一定的问题,虽然带来了一定程度的积极影响,使得设计端问题获得解决,但是在制作构建工业化的路途当中,传统的建筑习惯也影响着成品展示以及现场施工的诸多方面。为此,主要针对装... 装配式混凝土结构类钢结构化施工的实际开展,也逐渐暴露出一定的问题,虽然带来了一定程度的积极影响,使得设计端问题获得解决,但是在制作构建工业化的路途当中,传统的建筑习惯也影响着成品展示以及现场施工的诸多方面。为此,主要针对装配式混凝土结构类钢结构化施工工艺展开深入研究,希望可对建筑领域的发展带来促进意义。 展开更多
关键词 装配式混凝土 结构 钢结构化
下载PDF
装配式混凝土建筑现浇连接部位关键施工技术 被引量:3
2
作者 贾颖 《砖瓦》 2024年第2期123-125,共3页
为提高装配式混凝土建筑结构的连接效率和连接可靠性,以山东省烟台市深蓝国际人才交流中心为研究对象,在分析现有的装配式构件连接方式的基础上,提出了钢结构化的混凝土现浇连接方式,研究了墙体与板节点、梁-柱节点、柱-柱节点、柱与预... 为提高装配式混凝土建筑结构的连接效率和连接可靠性,以山东省烟台市深蓝国际人才交流中心为研究对象,在分析现有的装配式构件连接方式的基础上,提出了钢结构化的混凝土现浇连接方式,研究了墙体与板节点、梁-柱节点、柱-柱节点、柱与预制叠合板节点的连接施工技术。研究结果表明,该施工技术加快了现场施工进度,在项目实际效益方面取得了良好的效果。 展开更多
关键词 建筑工程 装配式 连接部位 施工技术 钢结构化 叠合板
下载PDF
The Formation of Colored Film on Stainless Steel and the Study for Surface Structure
3
作者 张征林 余琨 +2 位作者 王怡红 宋苇 冯东丹 《Journal of Southeast University(English Edition)》 EI CAS 1998年第2期61-66,共6页
This paper discusses the coloration process on the stainless steel and the properties of the film. The compositions, morphology and structure of colored films on stainless steel are studied by using SEM,AES,AFM,STM. ... This paper discusses the coloration process on the stainless steel and the properties of the film. The compositions, morphology and structure of colored films on stainless steel are studied by using SEM,AES,AFM,STM. The diffusion controlled mechanisms of films and calculation formula of surface electropotential difference are discussed. 展开更多
关键词 chemical coloration on stainless steel analysis of surface structure
下载PDF
Microstructures and wear resistance of chromium coatings on P110 steel fabricated by pack cementation 被引量:5
4
作者 林乃明 谢发勤 +3 位作者 周俊 钟涛 吴向清 田伟 《Journal of Central South University》 SCIE EI CAS 2010年第6期1155-1162,共8页
In order to obtain a high-performance surface on P110 steel that can meet the requirements in oil/gas field environment, the chromium coatings were fabricated by pack cementation. The chromium coatings differed in wit... In order to obtain a high-performance surface on P110 steel that can meet the requirements in oil/gas field environment, the chromium coatings were fabricated by pack cementation. The chromium coatings differed in with/without the addition of La2O3. Scanning electron microscope (SEM), energy dispersive X-ray spectrometer (EDS), X-ray diffractometer (XRD) and microhardness tester were employed to investigate the surface morphologies, surface element distributions, microstructures, phase constitutions and microhardness of the coatings. Friction-wear tests of the P110 steel substrate and the coatings were conducted in air at ambient temperature and humidity. The results show that 'uniform and continuous coatings are formed on P110 steel regardless of adding La2O3 or not. The chromium coatings consist of Cr23C6, Cr7C3, and (Cr, Fe)7C3. The La2O3-added chromium coating is more beneficial in terms of surface morphology, microstructure, thickness and microharduess as compared with the coating without adding La2O3. Chromizing treatment significantly improves the surface hardness and wear resistance of the P110 steel. The wear resistance of the tested samples can be sorted in the following sequence: La2O3-coating 〉 no RE-coating 〉bare P110 steel. 展开更多
关键词 chromium coating P110 steel pack cementation LA2O3 microstmcture wear resistance
下载PDF
Bonding mechanism of X10CrNi18-8 with Ni/Al_2O_3 composite ceramic by pressureless infiltration 被引量:7
5
作者 杨少锋 陈维平 +2 位作者 韩孟岩 杨超 朱德智 《Journal of Central South University》 SCIE EI CAS 2011年第4期953-959,共7页
Abstract: An alloy steel/alumina composite was successfully fabricated by pressureless infiltration of X10CrNil8-8 steel melt on 30% (mass fraction) Ni-containing alumina based composite ceramic (Ni/Al2O3) at 1 6... Abstract: An alloy steel/alumina composite was successfully fabricated by pressureless infiltration of X10CrNil8-8 steel melt on 30% (mass fraction) Ni-containing alumina based composite ceramic (Ni/Al2O3) at 1 600 ℃. The infiltration quality and interfacial bonding behavior were investigated by SEM, EDS, XRD and tensile tests. The results show that there is an obvious interfacial reaction layer between the alloying steel and the Ni/Al2O3 composite ceramic. The interfacial reactive products are (FexAly)3O4 intermetallic phase and (AlxCry)2O3 solid solution. The interracial bonding strength is as high as about 67.5 MPa. The bonding mechanism of X10CrNi 18-8 steel with the composite ceramic is that Ni inside the ceramic bodies dissolves into the alloy melt and transforms into liquid channels, consequently inducing the steel melt infiltrating and filling in the pores and the liquid channels. Moreover, the metallurgical bonding and interfacial reactive bonding also play a key role on the stability of the bonding interface. 展开更多
关键词 pressureless infiltration steel/alumina composites interface bonding infiltration mechanism
下载PDF
Physical and chemical performances of high Al steels
6
作者 王海川 董元篪 +2 位作者 张文明 王世俊 周云 《Journal of Central South University of Technology》 EI 2005年第4期385-388,共4页
The effects of acid-soluble Al content on the physical and chemical performances of high Al steels were investigated. The results show that the distribution of acid-soluble Al in steel substrate is uniform. With incre... The effects of acid-soluble Al content on the physical and chemical performances of high Al steels were investigated. The results show that the distribution of acid-soluble Al in steel substrate is uniform. With increasing Al content, the strength and toughness of steels decrease a little but the hardness increases. The average yield strength and tensile strength are 425MPa and 570MPa, respectively, and the Rockwell hardness is 89.7. For non-Al steels the average oxidation rate is up to 0.421mg/(cm2·h) at 1373K. For high Al steels, when the mass fraction of Al is less than 5%, there is a thinner gray oxidized layer on surface and the oxidation rate is high; when the mass fraction of Al is more than 8.0%, the thin, close and yellow glossing film still exists, and the average oxidation rate is only 0.016mg/(cm2·h). 展开更多
关键词 high Al steel physical performance chemical performance microstructure
下载PDF
Eco-transformation of steel industry in China: from the perspective of industrial ecology and circular economy 被引量:2
7
作者 LI Su-qin CANG Da,qiang +1 位作者 LUO Shi-mei ZHU Fang 《Ecological Economy》 2010年第3期217-227,共11页
Recently the behavior of human has resulted in the deterioration of global ecological environment, and global warming and environmental pollution have caused the occurrence of extreme events frequently If we repeat th... Recently the behavior of human has resulted in the deterioration of global ecological environment, and global warming and environmental pollution have caused the occurrence of extreme events frequently If we repeat the reckless environmental overkill, civilization will enter a victous circle of decline and lose even the strength and vitality to live in harmony with the environment. At Present, China is in a speciat period of rapid economic develop- ment. Some enterprises focus on short-term profits and don't formulate long-term strategies. For example, with the rapid expansion of the steel industry, some serious problems have emerged. Based on principles of industrial ecology and the concept of circular economy, to develop a new development model, taking a new road to industrialization is very necessary. Re-examining the current steel enterprises, this' paper proposes the new methods of the integration of material, energy integration, water system integration and sharing of information and facilities. Through ecologi- calization of technology, system, and industrial structure and product structure adjustment, the eco-transformation of the modern steel industry will be gradually achieved in China 展开更多
关键词 Steel industry Integration Eco-industrial park Eco-transformation
下载PDF
Microstructure and properties of Al-doped ODS steels prepared by wet-milling and SPS methods 被引量:1
8
作者 SUN Yu-zhou LIN Nan +6 位作者 ZHANG Wu-jun ZHANG Yong-sen LI Zhong-tao HAN Xian-qi WU Zheng-gang WANG Zu-yong MA Chao 《Journal of Central South University》 SCIE EI CAS CSCD 2021年第4期1219-1232,共14页
In this paper,15Cr-ODS steels containing 0,1 wt%,2 wt%and 3 wt%Al element were fabricated by combining wet-milling and spark plasma sintering(SPS)methods.The microstructure and mechanical properties of ODS steel were ... In this paper,15Cr-ODS steels containing 0,1 wt%,2 wt%and 3 wt%Al element were fabricated by combining wet-milling and spark plasma sintering(SPS)methods.The microstructure and mechanical properties of ODS steel were investigated by XRD,SEM,TEM,EBSD and tensile tests.The results demonstrate that the Al addition significantly refines the particle precipitates in the Fe-Cr matrix,leading to the obvious refinement in grain size of matrix and the improvement of mechanical properties.The dispersion particles in ODS steels with Al addition are identified as Al2O3 and Y_(2)Ti_(2)O_(7)nanoparticles,which has a heterogeneous size distribution in the range of 5 nm to 300 nm.Increasing Al addition causes an obvious increase in tensile strength and a decline in elongation.The tensile strength and elongation of 15Cr-ODS steel containing 3 wt%Al are 775.3 MPa and 15.1%,respectively.The existence of Al element improves the corrosion resistance of materials.The ODS steel containing 2 wt%Al shows corrosion potential of 0.39 V and passivation current density of 2.61×10^(−3)A/cm^(2)(1.37 V).This work shows that Al-doped ODS steels prepared by wet-milling and SPS methods have a potential application in structural parts for nuclear system. 展开更多
关键词 wet-milling spark plasma sintering ODS steels oxide nanoparticles MICROSTRUCTURE tensile strength dispersion strengthening
下载PDF
Microstructure Analysis for Chemical Interaction between Cesium and SUS316 Steel in Fast Breeder Reactor Application 被引量:2
9
作者 Koei Sasaki Takanori Tanigaki +2 位作者 Tomohiro Oshima Ken-ich Fukumoto Uno Masayoshi 《Journal of Energy and Power Engineering》 2013年第4期716-725,共10页
The objective of this study is to presume cesium corrosion process and its dominant factors in SUS316 steel, a fuel cladding material for fast breeder reactor application, based on both experimental results of cesium ... The objective of this study is to presume cesium corrosion process and its dominant factors in SUS316 steel, a fuel cladding material for fast breeder reactor application, based on both experimental results of cesium corrosion out-pile test and thermodynamic consideration. The cesium corrosion test was performed in simulated environment of high burn-up fuel pin. And main corrosion products in the specimen after the corrosion test were specified by TEM (transition electron microscopy) and SEM (scanning electron microscopy) in order to formulate a hypothesis of the cesium corrosion process. At the end of this study, it was found that the dominant factors of the corrosion process are the amount of cesium on the surface of the specimen, chromium content in the alloy, the supply rate of oxygen and temperature. 展开更多
关键词 FBR (fast breeder reactor) FCCI (fuel clad chemical interaction) cesium corrosion out-pile test SUS316 steel liquid-metal corrosion.
下载PDF
The Effect of Vanadium Content on Mechanical Properties and Structure of Self-Hardening Steel X 160C rMo 12-1
10
作者 Aleksandar Todic Dejan Cikara Tomislav Todie Branko Pejovie Milan Misic Ivica Camagie 《Journal of Mechanics Engineering and Automation》 2013年第3期168-172,共5页
The aim of this research was to examine the influence of vanadium on the structure, hardness and tensile strength of X I60CrMo 12-1 self-hardened steels. It is known that vanadium affects the process of solidification... The aim of this research was to examine the influence of vanadium on the structure, hardness and tensile strength of X I60CrMo 12-1 self-hardened steels. It is known that vanadium affects the process of solidification of this alloy in a way that narrows temperature interval of crystallization. Vanadium, as an alloying element, moves liquidus and solidus lines toward higher temperatures, approximately for 25 to 30 ~C. In addition, vanadium forms V6C5 carbides, which, are partly distributed between present phases in the steel; carbide (Cr,Fe)7C3 and austenite. The presence of vanadium enables the formation of (Cr, Fe)23C6 carbide and its precipitation into austenite during the cooling process. In local areas around fine carbide particles, austenite is transformed into martensite, i.e., vanadium reduces remained austenite and improves steel air-hardening. Vanadium concentration over 2.5% significantly improves the impact toughness. The basic problem in the application of high alloyed Cr-Mo steels is to increase their impact toughness and thereby sustain a relatively high value of hardness. Recent studies, concerning to the chemical composition and heat treatment regime, show that it is possible to get a martensitic structure with a very small amount of retained austenite. Investigations are directed toward the testing of the influence of alloying elements such as molybdenum, manganese and especially vanadium. Vanadium has great influence to the crystallization process. With increasing of its content, the eutectic point moves toward lower carbon concentrations and the temperature interval of solidification is narrowing. 展开更多
关键词 VANADIUM impact toughness HARDNESS microstructure.
下载PDF
Installation position determination of wind speed sensors on steel pole along a high-speed railway
11
作者 熊小慧 梁习锋 《Journal of Central South University》 SCIE EI CAS CSCD 2016年第11期3018-3027,共10页
In order to consider the influence of steel pole on the measurement of wind speed sensors and determinate the installation position of wind speed sensors, the flow field around wind speed sensors was investigated. Bas... In order to consider the influence of steel pole on the measurement of wind speed sensors and determinate the installation position of wind speed sensors, the flow field around wind speed sensors was investigated. Based on the three-dimensional steady Reynolds-averaged Navier-Stokes equations and k-ε double equations turbulent model, the field flow around the wind speed sensor and the steel pole along a high-speed railway was simulated on an unstructured grid. The grid-independent validation was conducted and the accuracy of the present numerical simulation method was validated by experiments and simulations carried out by previous researchers. Results show that the steel pole has a significant influence on the measurement results of wind speed sensors. As the distance between two wind speed sensors is varied from 0.3 to 1.0 m, the impact angles are less than ±20°, it is proposed that the distance between two wind speed sensors is 0.8 m at least, and the interval between wind speed sensors and the steel pole is more than 1.0 m with the sensors located on the upstream side. 展开更多
关键词 high-speed railway wind speed sensor steel pole numerical simulation flow field
下载PDF
Optimization of Reinforced Concrete Cum Masonry Construction
12
作者 John K. Makunza 《Journal of Civil Engineering and Architecture》 2015年第10期1137-1145,共9页
In design and construction of low/high rise buildings, different forms of construction can be applied such as concrete shear wall structural system and framed structural system without or with masonry infill walls. At... In design and construction of low/high rise buildings, different forms of construction can be applied such as concrete shear wall structural system and framed structural system without or with masonry infill walls. At present, most buildings in East Africa are constructed as reinforced concrete framed structures with strong masonry infill, but during design, engineers assume that the masonry infill panels have zero contribution in offering load resistance. Due to the problem above, a study with an objective of finding out the influence of masonry panels on the properties of reinforced concrete infilled frame under vertical load has been done. Three types of models: reinforced concrete frame model, masonry model and reinforced concrete frame with masonry infill, were investigated using finite element technique. In additional to the finite element analysis, laboratory models were prepared and tested so as to check the validity of the analytical results. The obtained results have led to an establishment of a mathematical model which may be useful to the design engineers since masonry wall panels can now be considered as load bearing elements. Such consideration of frame together with masonry leads to an accurate and optimal design of the frame, resulting into lesser amount of reinforcement and geometrical properties of the frame. 展开更多
关键词 CONCRETE masonry infill FRAME design and finite-element.
下载PDF
Damage-induced material softening and its effect on seismic performance of steel structures 被引量:1
13
作者 WANG XinYue SUN Bin LI ZhaoXia 《Science China(Technological Sciences)》 SCIE EI CAS CSCD 2016年第10期1559-1572,共14页
A numerical approach for simulating the seismic performance of steel truss structures, considering damage-induced material softening, is developed based on a ductile damage constitutive model by applying the backward ... A numerical approach for simulating the seismic performance of steel truss structures, considering damage-induced material softening, is developed based on a ductile damage constitutive model by applying the backward Euler explicit algorithm. It is implemented in ABAQUS through a user-defined material subroutine, by which damage evolution could be incorporated into the analysis of seismic performance of steel structures. The case study taken up here is the investigation of a steel connection with a reduced beam section(RBS) and a steel frame with such connections. The material softening effect during the failure process is particularly investigated. The results show that material softening in the vulnerable zone has a significant effect on the distribution of stress and strain fields, as well as on the carrying capacity of the steel connection with RBS. Further, material softening is found to have almost negligible effect on the seismic performance of the steel frame in the early stages of the loading process, but has a large effect when the steel frame is about to fail. These findings offer a practical reference for the assessment of seismic structural failure, and help in understanding the damage mechanism of steel structures under seismic loading. 展开更多
关键词 constitutive model damage evolution damage-induced material softening seismic response steel structure
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部