丙二醇苯酚醚作为胶乳的成膜助剂

关于乙二醇苯酚醚(Epb)作为胶乳成膜助剂的性能,已有许多文献报道。近来丙二醇苯酚醚(ppb)又作为添加剂的一员,进入胶乳成膜助剂的行列。然而,尽管ppb用量在不断增多,但有关其物理性质及其降低成膜温度的效能,却很少报道。     

LTV钢公司C—5和C—6号高炉的改建

在成功地改造两座大型高炉的前提下，克服计划重叠所积累的经验将有助于完善未来主要项目的规划。最初的目标是提高产量，通过改每座高炉的日产量已由３４００－３６００ｔ提高到４０００－４２００ｔ。     

合成孔径雷达用于雪和冰川调查的可能性和局限性

概述了解释冰雪微波测量的物理背景。根据在瑞士阿尔卑斯山的测量结果，说
明了各类雪的后向散舒的角特性和光谱特性。讨论了与雪和冰川调查有关的SAR图
象的信息量，并举例说明了海军卫星SAR和机载SAR图象。初步给出了用于雪和
冰川监测的最佳SAR系统的技术参数。SAR的主要优越性是无天气依赖性，所以，
SAR资料对调查冰雪的物理状态特别有意义。令后，SAR遥感器在雪和冰川监测
系统中将成为重要的组成部分。但为了满足各类任务的需求，仍需要高分辫率的光
学遥感器和改进后的被动微波遥感器。     

铬钢用喷吹碳化钙法脱磷

<正> 前言在最近十年里,对钢的洁净度,特别是磷的要求愈来愈高。磷对钢性能的有害影响是众所周知的,并且下了很大功夫致力于炼铁及炼钢过程中的脱磷。在一般的炼钢过程中,通常在氧化期进行铁和低合金钢的脱磷,目前还对高炉铁水进     

论东西伯利亚油气无机生成的可能性

目前，世界上仍根据油气有机生成说（沉积-运移）对油气进行预测和勘探。但近年来出现了越来越多的热力学、地球化学、地球物理学和地质学资料证实，可能存在着地幔生成的烃类（B．C．祖布科夫，2000）。这些具有定量特征的资料确保了油气有机成因说的科学性。本文并不涉及油气成因2种基本学说的争论，而是以东西伯利亚（西伯利亚地台的涅普斯克-鲍图奥宾台背斜及其周围不同年代的大陆裂谷）为例，分析油气无机成因的标志并关注改变该地区油气资源勘探战略的合理性。     

LASER CLADDED TiCN COATINGS ON THE SURFACE OF TTTANIUM

Laser cladded coatings of TiCN were produced on the surface of titanium. To obtain the optimal techniques, several conditions were tested by varying the laser scanning rate. The choice of shielding gas was also studied. The cladded coatings were then evaluated from the surface mechanics point of view based on their microhardness. The microstructure of some interesting samples was investigated by optical micrographs （OM）. The results showed that under the condition of fixed pulse frequency and pulse width, the laser scanning rate and the shielding gas are the main factors influencing the components of coatings. TiCN coatings were decompounded and oxidized during the cladding process in the condition of no shielding gas of N2. X-ray diffraction results indicated that the composite coatings composed of TiCN, TiC, Ti2N, and TiO2 were produced using appropriate techniques. The results indicated that the best condition in terms of the surface microhardness is obtained when the scanning rate is 1.5mm/s, the pulse frequency is 15Hz, the pulse width is 3.0ms, and N2 is chosen as the shielding gas. The microhardness of the composite coatings is about 1331kg · mm^-2, which is about 4 times that of the substrate. The optical micrographs indicated that the cladding zone is made up of TiCN, TiO2 and some interdendritic Ti, but the diffusion zone mainly consists of the dendrites phase, and the cladded depth is about 80μm, which is more than 2 times that of the laser nitrided sample. There were no microcracks or air bubbles in the cladded sample, which was cladded using the above optimal techniques.     

用辅以微信息处理机的热分析法检测铸铝合金质量

一种不需进行常规金相检验而用冷却曲线分析的新技术,已被福特公司开发并在生产中用于现场快速监控Essex铝-硅合金熔体。从含有不同原始铝晶粒和共晶硅熔体得到的冷却曲线利用微处理机进行数学分析。这种新技术通过冷却曲线进行微分及随后进行的相变区域积分这两种数学运算,得到监控熔体质量的峰值读数。一旦确立了足够的峰值读数与组织的关系,则可在不取金相试样的情况下预测任何熔体的铸造组织。