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割管机曾良志云南易门铜矿木奔选厂摘 要:<正> 我厂输送矿浆用的钢管较多,尤其是磨浮车间,3~10时管的弯头需要量更大.过去钢管的割制是人工割制,劳动强度大,质量差.组焊成弯头后内部缝隙大,容易磨通.为了解决以上问题,我们用行星传动原理设计了一台机械割管机.机械传动示意图见图1.关键词:......
简易弯管器唐开发湖南汝城钨矿摘 要:<正> 敷设管子时要求有直的弯的,弯的曲率半径有大有小.弯的曲率半径越小,管子的直径越大,越难弯.如何将管子圆滑地弯好,一般热弯较好,但受热源的限制,不适应野外作业,而且效率低.冷弯,费劲,易产生严重变关键词:......
以人为本管好设备促生产王建丽中石化管道储运公司摘 要:从健全设备管理组织机构,职工参与管理的积极性,以制度制约人,预防性维修几个方面介绍以人为本,人机结合的设备管理方法.关键词:以人为本;人机结合;规章制度;预防性维修;......
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型纳米复合膜修饰碳糊电极(CPE),建立了一种测定扑热息痛(PCT)的新方法.采用扫描电镜(SCE)对修饰电极进行了表征;利用循环伏安法(CV)研究了PCT在修饰电极上的电化学行为.利用微分脉冲溶出伏安法(DPSV)优化了测定PCT的试验条件.结果表明:PCT在Nafion/GS/AuNs修饰电极上于0.43V处出现了一灵敏的氧化峰(Epa),其电极过程受扩散控制.同时利用氧化峰可以进行微量PCT的检测,其峰电流(ip)与PCT浓度(c)在0.5~10μmol/L和10~900μmol/L范围内均呈良好的线性关系,相关系数分别为0.9968和0.9973,检出限(S/N=3)为0.1μmol/L.复合膜修饰电极稳定性较好,可用于实际药品中扑热息痛的含量的快速检测.关键词:石墨烯;纳米金;碳糊电极;微分脉冲溶出伏安法;扑热息痛;......
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. The results by scanning electron microscopy (SEM) show that the coating of the sam-ple (0.09 wt pct Si) with iron-electrodeposited pretreatment eliminates the reactive zones which are found in the coating without iron-electrodeposited pretreatment. The galvanized sample (0.28 wt pct Si) with iron-electrodeposited pretreatment exhibits a compact and coherent coating. The coating of the sample (0.37 wt pct......
to 16-18 MPa.m1/2.But 15 wt pct Mo was not more effective on Ti(C,N)-based cermets, because the thickness of the rim becomes larger. In the circumstance of Mo2C, 5 wt pct Mo2C was good for microstructure and properties of Ti(C,N)-based cermets, but 11 wt pct Mo2C has resulted in larger contiguity of Ti(C,N) grain and big Ti(C,N) grain diameter so as to reduce transverse rupture strength......
transformation (TTT) behavior of the low carbon steels with two Si con-tents (0.50 wt pct and 1.35 wt pct) was investigated with and without the prior deformation. The results show that Si and the prior......
×10-6 with the content of metal Cu-Ni increasing from 0 to 20 wt pct. Post-examination shows that metallic phase Cu-Ni is corroded preferentially during electrolysis and many pores are left at the anode surface. Considering the corrosion resistance and electrical conductivity, the cermet containing metal Cu-Ni 5 wt pct should be selected and studied further. Key words:Aluminum electrolysis; Inert......