85W／90卡车手动变速箱油的研制

介绍８５Ｗ／９０卡车手动变速箱油的组分和添加剂，提出符合８５Ｗ／９０粘度级别的基础油，讨论影响８５Ｗ／９０卡车手动变速箱油性能的各种因素，给出符合８５Ｗ／９０卡车手动变速箱油规格的油品配方。     

Studies on the interactions of metal oxides and Na2 SO4 at 1100 and 1200 K in oxygen

The interaction of different metal oxides such as Co₃O₄, NiO, Al₂O₃, Cr₂O₃, Fe₂O₃ and SiO₂ with Na₂SO₄ at a temperature of 1100 and 1200 K in flowing oxygen has been studied. The thermogravimetric studies for each system were carried out as a function of Na₂SO₄ in the mixture. The presence of different constituents in the reaction products were identified by X-ray diffraction analysis and the morphologies of the reaction products were characterized using metallography and scanning electron microscopy (SEM). The formation of products was also investigated by thermodynamic computation of free energies of the reactions and the study of relevant equilibrium phase diagrams. The soluble species in the aqueous solutions of the reaction products were determined quantitatively using atomic absorption spectrophotometry. The high temperature interaction products usually contain a 3-phase structure namely, Na₂O·M₂O _x , M₂O _x and metal sulphide and/or metal sulphate. The formation of Na₂O·M₂O _x depends upon the solid state solubility of metal oxide in the molten salt at high temperatures. Under limited solubility conditions Na₂O·M₂O _x is invariably formed, but as soon as this condition is relaxed the oxide. M₂O _x , precipitates and forms a separate phase.     

提高曲面近似展开精度的方法与实现

通过对不可展曲面近似展开精度的研究，提出了根据曲面曲率的大小对曲面自动进行网格划分，通过对综合展开误差数据场进行数据拟合来选取最优展开基点，基于空间曲面与其展开图间近似的等距变换关系进行展开样形的误差矫正等3种方法，这几种方法的实现在不同程度上有效地减小了曲面的近似展开误差，提高了曲面的近似展开精度。     

锌基合金模具的应用及探讨

本文分析了锌基合金模具制造及使用过程中容易出现热裂、翘曲、收缩的问题，并提出了解决这些问题的措施。     

浅谈采用短木桩加土工网碎石垫层处理挡墙软基

结合工程实例，对采用传统的短木桩加新兴的土工合成材料——土工网及碎石垫层构成复合基础，处理河岸挡墙软基进行探讨，该方法在软土层厚度不超过4．0m的条件下，技术可靠，施工简单，工期短，造价低。     

2-巯基苯并噻唑衍生物摩擦学性能的研究

合成了S—(1—(2—苯并噻唑基巯基)—2—羟基)—丙基N，N—二烷基二硫代氨基甲酸酯和S—(1—(2—苯并噻唑基巯基)—2—乙酰基)—丙基N，N—二烷基二硫代氨基甲酸酯两种化合物。运用IR、MS、HNMR和元素分析等分析方法对其结构进行表征。用四球试验、HQ—l环块试验分别考察了其对润滑油的极压承载能力及抗磨减摩性能的影响。结果表明：在350SN中性油中添加所合成的化合物后可以显著降低四球长磨后磨斑直径、有效地降低摩擦副之间的摩擦系数，拥有优良的摩擦学性能。     

金堆地区浅基础设计的实践

通过对金堆地区建筑物稳定性变化的分析，提出了金堆地区浅基础设计的见解，阐明了在进行浅基础设计时，应在综合分析地质、地形、地貌、建筑物特性等因素的基础上，进行择优选择，对该地区的浅基础设计有一定的指导意义。     

润滑油基础油的现状及发展趋势

叙述了内燃机油的发展对基础油的要求，并对传统工艺和加氢工艺生产的基础油质量状况进行了分析，指出润滑油加氢工艺是提高基础油质量的有效途径。加氢工艺生产基础油是润滑油的发展趋势。