浅谈影响铁液含氢量因素

我公司在铸铁件生产中，铸件的气孔缺陷时有发生，经认定主要以析出性氢气孔为主，铁液含氢量高是主要原因。针对这一问题，我们分析影响铁液含氢量的因素，并在生产中采取了相应措施，使氢气孔缺陷明显减少。本文主要阐述了冲天炉生产条件下铁液含氢量的影响因素，供大家参考。     

Formability and cavitation behavior of superplastic AA5083 aluminum alloy under biaxial tension

The superplastic forming potential of two fine-grained 5083 aluminum alloys were studied under biaxial tension using a pneumatic bulge test. Experiments were performed at temperatures ranging from 475 to 525 ℃ with three different strain paths ranging from equi-biaxial to approaching plane strain. The shape of the forming limited diagram（FLD） is found to be significantly different from FLDs commonly used in room temperature stamping. The effects of temperature on final thickness distribution, dome height and cavitation were investigated for the case of equi-biaxial stretching. Increasing temperature in free bulge forming can improve the thickness distribution of final parts but have no significant effect on dome height. The results indicate that determination of forming limits in SPF cannot be represented with a simple FLD and additional metrics such as external thinning and internal cavitation needed to determine the SPF potential of a material.     

凯创SSR8600G位交换路由器在我台骨干网中的应用

1引言 2001年11月11日中国入世的成功,标志着中国的电信业及其它行业引入竞争,也给中国的广电带来新的机遇和挑战.随着SDH、ATM、IP技术的迅猛发展,全国各地有线电视台HFC双向网改造的步伐相继加快,千兆以太网技术也广泛渗入到城域骨干网中,它以技术成熟、标准统一、灵活性强、价格低廉的优势,在行业中独占鳌头,是多数有线电视台的首选方案.     

高青油田孔店组火山岩成藏特征

综合利用钻井地质、测井和岩心分析化验资料，应用勘探阶段油藏描述的理论基础和方法，采取测井约束反演等技术手段，对本区火山岩的喷发期次、空间展布、火山岩储层特征及储层发育控制因素与油气成藏规律等进行研究，找出了油气分布的有利部位，明确了滚动勘探开发的主要目标。     

天荒坪抽水蓄能电站发电电动机

文章从电机的参数、结构等方面详细叙述了加拿大通用电气公司为天荒坪抽水蓄能电站设计、制造的发电电动机，并介绍了机组的运行情况。