渣油催化临氢热转化钼铁双金属催化剂的研究

Replacement of precious single metal catalysts with cost-effective, highly-dispersed composite catalysts for catalytic hydrothermal conversion of residue holds tremendous promise for the residue upgrading technologies. Organic metals were added to the feed as the oil-soluble precursors, and transformed into the catalytic active phases in this work. Physical properties and structures of the composite catalysts had been investigated by X-ray fluorescence spectroscopy, X-ray photoelectron spectroscopy, X-ray diffraction, scanning electron microscope and transmission electron microscopy. The composite catalysts were found to be highly efficient in the catalytic hydrothermal conversion of both model compound and residue. Increased metal dispersion and synergistic effects of two metals played indispensable roles in such catalytic system. Results showed that under the test conditions in the article, the catalyst had the best catalytic performance when the mass ratio of molybdenum to iron was 1.5.     

双金属旋锻制取空心钨片及钨管的工艺研究

为了满足汽车点火器接点用空心钨片(具有加工形变组织)及套管用小直径厚壁钨管的需要,本文研制了一种制备钨钼双金属棒材并溶去钼芯制取小直径空心圆钨片和小直径厚壁钨管的新工艺。用于汽车点火器接点的空心钨片是由切割双金属棒材成圆片后,用配制的溶液溶去钼芯而制得。套管则是切取一定长度的钨钼棒材,用通电自身加热法熔去钼芯制得。     

双金属复合界面结合性能的研究

本文阐述了采用液固结合的方式来制备高铬铸铁和中碳钢双金属复合材料，分析和讨论了外材与芯材在不同体积比下界面的组织，从而对双金属复合铸造工艺的优化起到了指导性的作用。