【摘 要】
:
Niobium Bearing Low Carbon Low Alloy(LCLA)value-added S355 structural steels reduces the overall material and construction costs for many high strength construction steel and heavy equipment applicati
【机 构】
:
CBMM-North America,Inc.,USA CBMM-Sao Paulo,Brazil
论文部分内容阅读
Niobium Bearing Low Carbon Low Alloy(LCLA)value-added S355 structural steels reduces the overall material and construction costs for many high strength construction steel and heavy equipment applications.The recent development of the Nb-LCLA Approach is a value-added low cost approach for many structural steel applications including windtower supports,beams and other structural plate applications.Case examples are presented from Brazil,China and the USA.These Nb-bearing steels at lower carbon content compared to the traditional higher carbon normalize heat treated grades are more cost effective and reduce structural fabrication time through improved weldability as well.
其他文献
利用GTS探空数据计算的低空大气波导统计验证了MM5模式大气波导数值预报的准确性和精度.统计结果表明:低空大气波导数值预报整体上来说,对波导的有无预报准确率较高,尤其能对强波导做出准确的预报;但在预报精度方面还有待于进一步提高.
本论文阐述北斗反射信号进行湿度遥感的原理与实验结果,这种遥感手段主要基于两种方法—干涉信号法和反射系数法.文章首先简单介绍了利用导航信号遥感土壤湿度的现状,重点介绍了北斗系统与其他导航系统的区别.在此基础上,建立了北斗干涉信号模型与反射信号模型.通过对野外试验场的数据收集和处理,给出了两种方法对长期数据的处理结果,证明本文采用的两种方法都能获得土壤湿度的变化趋势.
本文利用武汉MST(Mesosphere-Stratosphere-Troposphere)雷达对降雨事件的观测,建立二阶高斯谱模型,拟合得到相应的大气湍流谱与降雨谱信息,从而提取大气背景三维风场及降雨参数信息,根据降雨回波谱反演不同高度的雨滴粒径分布.根据降雨回波信息特征及雨滴粒径伽马分布特征,研究了对流层区域降雨的微物理过程.
大气修正折射率剖面能够描述大气波导的特征,基于中尺度WRF模式,以NCEP再分析资料FNL数据作为背景场和边界场,采用二重嵌套,模拟了东海区域蒸发波导高度和强度分布,根据四参数蒸发波导M剖面模型建立M剖面,并与单参数蒸发波导M剖面和伪实测蒸发波导M剖面进行对比,结果发现和单参数模型相比,四参数模型可以更加灵活更加准确的描述蒸发波导M剖面.
Designing a competitive free-machining steel composition enabling less expensive steelmaking,manufacturing and recycling has long been a desirable objective.Foremost amongst a new approach has been si
Coal,as the most major energy in China,accounted for about 70%of Chinas primary energy production and consumption.While the percentage of coal as the primary energy mix would drop in the future due to
In this paper,different morphology and size of nano epsilon carbides(-carbides)were obtained by low temperature tempering for a low alloy abrasion resistance steel,the variation of mechanical properti
The CCT(continuous cooling transformation)curve of the test steel was obtained on Gleeble-1500 thermal mechanical simulator based on the thermal dilation measurement.The test steels were the deformati
The flow stress,microstructure and softening mechanism of NM550 wear-resistant steel were investigated via hot compression test by using Gleeble-1500 thermal simulator in a temperature range from 800
The chemistry composition,process parameters and the test results of Q890D free boron high strength steel plate used for engineering machinery was studied.The 16~40 mm thickness steel plates with good