转炉脱磷效果影响因素分析

从氧气顶吹转炉脱磷的热力学分析入手,探讨了冶炼过程中温度、炉渣碱度、(FeO)对磷含量的影响,回磷的原因、影响因素及防止措施等,指出应控制炉渣碱度、终点温度、(FeO)在合理范围内,应重视钢水回磷问题。     

城市供水管网漏损探讨

就漏损控制这一项复杂的系统工程，详细地介绍了我国城市供水管网的漏损现状，分析了进行漏损控制产生的效益，造成漏损的主要原因及防治措施，提出漏损量的大小是衡量供水管网技术技术和运行的重要指标。     

混凝土外加剂在防渗工程中的应用

根据江东灌区的工程实际，总结了在渠道防渗工程中混凝土外加剂应用情况，提出了应用中的注意事项。     

强化供应商资格审查提高企业物资采购质量

在市场经济不断完善的进程中,运用公开招标方式优选设备,材料,备品备件供应商是衡量一个企业专业化程度的标尺,强化对供应商资格审查、甄别是决定能否科学地确定满足本企业物质采购需求合作伙伴的重要环节。是企业规避采购风险,降低生产成本、完成经营目标、实现经济效益的有效保障。     

Effects of quenching treatment on the structure and electrical property in doped V2O3 system

The effects of quenching treatment are examined in terms of the phase present, microstructure and electrical properties for doped V2O3 system, in this paper. The results indicate that the specimens transform to the PM phase and show microcracks in the structure after quenching. The room temperature (RT) resistivities become low and the resistivity ratios increase remarkably. There are optimum values for the RT resisitivity and resisitivity ratio under a certain quenching time. The electrical properties of quenched specimens containing Fe metal phase become stable after subsequent thermal cycles. This revised version was published online in November 2006 with corrections to the Cover Date.     

In-situ Formed AIN Particulates and TiN Whiskers Mixture Reinforced Al Composite

The TiNw-AINp/Al composite has been successfully fabricated by gas-liquid reaction method in an intensive electromagnetic mixing and casting in an appropriate cooling condition. The as-cast samples of the composite exhibit a homogeneous distribution of TiNw and AINp, and the in situ formed TiN whisker has a mean diameter of 0.5 μm and mean aspect ratio of 5.8~7.5, and the diameter of the AIN particulates is less than 5 μm. TEM observation indicates that there exist some submicron and nanometer sized in situ formed TiNw-AINp in α-Al matrix. The formation mechanism of in situ formed TiNw and AINp is also discussed     

安启华签约网域万通

日前,来自美国硅谷的高科技公司北京安启华科技有限公司(Anchiva)与专业的安全产品渠道商北京网域万通科技有限公司(网域万通)合作签约仪式暨新闻发布会在京举行。Anchiva中国区总经理李松先生和网域万通总经理邱召强出席了此次活动。根据协议,网域万通将正式成为Anchiva在中国的总代理,Anchiva将为网域万通提供完善的技术支持和丰富的渠道机制,     

双抽机组工况图的画法分析

双抽机组热-电负荷关系非常复杂，运行人员难于分配。介绍一种较精确的工况图画法，可以为电厂运行人员提供可靠的基础。     

Al-4%Cu过饱和合金在强磁场中时效行为

采用差示扫描量热仪分析并结合显微硬度测试、电子探针分析、透射电镜观察研究了10-T稳恒强磁场对Al-4％Cu（质量分数）合金130℃时效过程中各沉淀相析出行为的影响。结果表明：在低温时效初期强磁场的引入加速了铜的扩散，降低了G.P.（Ⅰ）区的溶解激活能，促进其溶解，各沉淀相的析出与溶解温度均向低温处移动，时效进程加快；另外，强磁场时效后沉淀相尺寸减小；施加强磁场试样的硬度明显高于未施加磁场试样的，时效硬化效果加强。