现代锡磷青铜带材生产工艺与技术

锡磷青铜带是当前应用最广泛的铜合金弹性材料。电子、通讯和汽车行业的高速发展，接插件、连接器用的锡磷青铜带材需用量剧增，质量上要求高精度、高表面、优良的板型和严格的性能值。该文就现代锡磷青铜带材生产的熔炼与铸造、退火、轧制、清洗、矫平、剪切等工艺与技术作一介绍。     

新型熔铸云母绝缘材料在矿热炉中的应用研究

介绍了一种新型合成熔铸云母材料，它具有电绝缘、耐高温、耐腐蚀、抗氧化、抗蠕变、有弹性、可切削加工等特点，克服了普通云母材料不耐高温、抗压强度低、易粉碎、易分剥和一次性使用的弊端，是矿热炉的理想绝缘材料，对矿热电炉的综合节能降耗很有意义，值得推广应用.     

本钢连铸板坯质量评价及改善措施

结合本溪钢铁集团公司连铸板坯质量存在的问题．应用大样电解、金相分析、扫描电镜能谱分析等检测手段，对选定典型钢种（Q235）铸坯中夹杂物的质量分数、形态及组成，铸坯中气体等进行了分析和综合评价，并提出了改善铸坯质量的具体措施，为进一步提高本钢连铸坯质量提供了理论指导依据。     

马钢连铸机软水系统工艺设计改造

主要阐述马钢连铸机软水系统近几年在生产过程中存在的问题,并针对这些问题进行分析,通过工艺设计改造,取得良好生产运行效果及经济效益。     

带钢坯连铸机的设计与生产

简介了莱钢1号小方坯连铸机改造为带钢坯连铸机在经济上的合理性，阐明了连铸机的主要工艺参数和带钢坯的品种结构。连铸机改造分阶段进行。经改造后的新型连铸机成功地应用了定径水口不断流快速更换、结晶器液面自动控制、多点矫直等多项连铸新技术和自主开发的新技术；并通过对中问包包形、保护渣、结晶器流场等的进一步优化。确保其达到安全、高效、稳定、顺行的理想效果。     

Effects of Rare Earth Oxide on Viscosity of Mold Fluxes for Continuous Casting

The effects of RE (rare earth) oxide on viscosity of mold fluxes were investigated with a rotary viscometer. The results show that : (1) The viscositv of mold fluxes is remarkably inereased by RE oxide addition, especially when the mass fraction of RE oxide is more than 10%. (2) By addition of RE oxide, precipitation of the insohlble particles with high melting point from the molten slag with the decreasing of the temperature leads to the inerease of viscosity. Viscosity curve shows that RE oxide is soluble in some extent in mold fluxes. When RE oxide is in a state of supersaturation, the existence of insoluble particles also makes the viscosity of mold fluxes increase. (3) Not only the viscositv of nlold fluxes can be reduced, but also the capacity to dissolve and absorb RE oxide can be increased by Li2O, B2O3 and BaO. However, the contents of Li2O, B2O3, and BaO should be controlled to suitable levels. (4) The solidification temperature of mold fluxes can be increased by the addition of RE oxide, which is unfavorable to heat transfer and luhrication of mold fluxes between steel shell and mold.     

Partial Remelting of Thixotropic Magnesium-Rare Earth Alloy from Near Non- Equilibrium- Liquidus Casting

After the investigation on partial remelting of thixotropic magnesium serial alloys （ZK60） by near non-equilibrium liquidus casting （NNLC）, the primary solid grains of ZK60-2Ca alloy spheroidized notably during partial remelting processing, however, coarsening and polygonization as occurred holding time prolonged. The refining and globularity of the thixotropic alloys are promoted after further alloyed by Y, RE, Nd and/or Ag, and the results vary with those addition. The remelting structure of ZK60-2Ca-1Y alloy is finer than its base alloy. And the effect of RE, especially Ag, on the refinement of microstrueture is notable, but Nd does nothing on it. There is little impact of remelting temperature fluctuation on partial remelted microstrueture as holding time in general. On the contrary, it is more sensitive at longer holding time. The quality thixotropic silver-contained alloy can be achieved by remelted partially at 600℃ for 10 min.     

INMO结晶器液压振动控制系统

介绍了攀钢2#板坯连铸结晶器振动控制系统,对系统的组成、功能、调节原理及运行作了简要阐述。振动设备采用达涅利公司开发的结晶器液压振动系统(INMO系统),具有振动质量小,振幅、频率和振动波形可调整的特点,从而改善了铸坯表面与结晶器铜壁的润滑效果,减少振痕深度,提高铸坯表面质量,并减少粘结漏钢。     

浅析影响SCR法铸坯质量的因素

分析了SCR连铸连轧工艺生产铜银合金导线时,铸坯凝固的热阻界、铸模的传热条件、铸坯组织的控制对产品质量的影响。     

小型CPL用高性能烧结毛细芯的研制

采用粉浆浇注工艺和氢气还原烧结工艺研制小型CPL用烧结镍毛细芯，通过优选粉浆液固比、添加剂的种类与数量、浆料pH值等参数制备了符合设计要求的烧结毛细芯。测试了毛细芯孔径、孔隙分布特征、孔径分布、孔隙度、渗透率等性能参数，分析了烧结气氛、温度、时间对毛细芯性能的影响。试验结果表明，研制的毛细芯孔隙度在68％以上，孔隙尺寸约4μm，渗透系数在10^-12～10^-13m^2之间。