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建筑用抗震钢高应变低周及超低周疲劳性能研究进展 总被引:2,自引:0,他引:2
近年来全国各地高层建筑迅猛发展,同时我国已经进入第五个地震活动期,这对建筑用钢的高应变低周、超低周疲劳性能提出了严峻的挑战。用于制作抗震构件的低屈服点钢,作为抗震用钢的新钢种将会得到越来越广泛的应用。为此,本文介绍了国内外建筑抗震用钢的高应变低周、超低周疲劳研究现状,着重阐述了低屈服点钢的研发及其低周疲劳性能研究状况,探讨了提高钢抗震性能的措施,并指出了今后国内抗震用钢低周、超低周疲劳研究的方向,为进一步提高建筑用抗震钢的综合抗震性能提供借鉴。 相似文献
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新一代低碳钢--HSLC钢 总被引:7,自引:0,他引:7
傅杰 《中国有色金属学报》2004,14(Z1):82-90
在整个钢生产过程中,综合考虑了钢的冶金质量控制和轧制工艺控制,实现了低碳钢晶粒细化和第二相析出综合强化,使普通成分的低碳钢或不添加微合金元素V,Nb的低C-Mn钢的屈服强度达到了400~500MPa,开发了新一代低碳钢--HSLC钢.介绍了HSLC钢的力学性能及其冶金质量控制,主要为HSLC钢与HSLA钢的力学性能对比;CSP条件下低碳钢中碳的控制;电炉钢低氮控制理论与控制技术;夹杂物超细化-纳米硫化物和氧化物固态析出的成分设计原则和控制技术以及钢中铝的作用与控制.并对低碳钢中纳米铁碳化物的析出及其对钢的强化作用、转炉薄板坯连铸连轧生产HSLC钢以及HSLC钢用于建筑钢筋生产的可能性进行了分析讨论,指出HSLC钢具有广阔的发展前景. 相似文献
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Huajie Wu Yangchun Liu Jie Fu 《北京科技大学学报(英文版)》2007,14(4):312-316
On the basis of the effect of carbon precipitation on the microstructure and properties of steel products below At temperature, a new thermal treatment method (temper-rapid cooling process) was studied. By the temper-rapid cooling process, the yield strengths of the high strength low carbon (HSLC) steel ZJ330 and SPA-H produced using the compact strip production (CSP) process increased from 340 to about 410 MPa and from 410 to about 450 MPa, respectively. The results indirectly indicated that there existed nanoscaled iron-carbon precipitates that have obvious precipitation effect on low carbon steel produced by CSP. The prospect of application is discussed. 相似文献
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FU Jie WU HuaJie LIU YangChun & KANG YongLin School of Metallurgical Ecological Engineering University of Science Technology Beijing Beijing China School of Materials Science Engineering University of Science Technology Beijing Beijing China 《中国科学E辑(英文版)》2007,50(2):166-176
This paper studies the composition, quantity and particle size distribution of nano-scaled precipitates with size less than 20 nm in high strength low carbon (HSLC) steel and their effects on mechanical properties of HSLC steel by means of mass balance calculation of nano-scaled precipitates measured by chemical phase analysis plus SAXS method, high-resolution TEM analysis and thermodynamics calculation, as well as temper rapid cooling treatment of ZJ330. It is found that there existed a large quantity of nano-scaled iron-carbon precipitates with size less than 18 nm in low carbon steel produced by CSP and they are mainly Fe-O-C and Fe-Ti-O-C precipitates formed below temperature A1. These precipitates have ob- vious precipitation strengthening effect on HSLC steel and this may be regarded as one of the main reasons why HSLC steel has higher strength. There also existed a lot of iron-carbon precipitates with size less than 36 nm in HSLA steels. 相似文献
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采用ASTMC1202-97方法测试了高强结构轻集料混凝土(HSLC)28 d和60 d龄期的导电量,分析了其氯离子渗透性能。试验结果表明:陶粒预湿处理会降低HSLC早期抗Cl-渗透性能,但对后期能力影响较小;粉煤灰的掺入可有效提高HSLC抗Cl-渗透性能,且随其掺量的增加,其增强作用大大提高;龄期对HSLC抗Cl-渗透性能的影响程度高于其对普通混凝土的影响,尽管HSLC早期抗Cl-渗透性能低于普通混凝土,但其后期增长率显著高于普通混凝土。 相似文献
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