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中国向日本出口铸件,从美国引进设备、技术,资金;美国铸造工业的出路在西方还是东方,是作出抉择的时候了;庞大但落后的中国铸造工业,具有日本寻求继续发展至关重要的基础条件。 相似文献
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本文就怎样生产出外观漂亮、内在质量优良的铸件,以利中国铸件向日本出口的问题,讲述了一些简单可行的方法。 相似文献
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一.出口的四大“走势”
中国经济持续高速发展以及世界制造业向中国新一轮快速转移,给精铸业发展和铸件出口带来极好的生机与机遇。基于同海外客户的多年接触以及承接订单、代理出口的体验,我们认为近年来出口精密铸件走势凸显特征是: 相似文献
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在“十五”期间,我国铸件产量跃居世界第一位,成为铸造生产大国,但还需要进一步提高铸件质量,为把我国建设成铸件生产强国而努力。在2006年到来之际,展望“十一五”,我们要振兴中国铸造业,提高铸件质量和企业的经济效益,向铸造强国的目标迈进,铸件出口是一个重要的突破口。铸件出口就是要把中国的铸造产品放到国际市场上去竞争,市场竞争是压力也是动力,有助于广大铸造企业自主创新,开拓进取,不断改进铸造工艺,提高铸件质量和技术含量。 相似文献
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Hiroaki Okamoto 《Journal of Phase Equilibria and Diffusion》2013,34(3):251-263
Recent literature on Cs-In, Cs-K, Cs-Rb, Eu-In, Ho-Mn, K-Rb, Li-Mg, Mg-Nd, Mg-Zn, Mn-Sm, O-Sb, and Si-Sr phase diagrams is reviewed in this article in order to update the 1990 compilation Binary Alloy Phase Diagrams, 2nd edition, by T.B. Massalski, et al. For some systems reaction tables and crystal structure data have been included, as well. Diagrams have been checked for consistency with rules for phase diagram construction and modified when necessary. In addition, diagrams needing more work have been identified. 相似文献
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The bicyclic cryptand 1,4, 7, 10, 13, 16, 21, 24-octaaza-bigcyclo [8, 8, 8] hexacosan-3, 8, 12, 17, 20, 25-hexone (COBH) bearing diaminoethane groups along the eight-atom bridges was synthesized. The structure consists of discrete neutral macrobicyclic units; the two cycles share the two tertiary amine nitrogen atoms, which exhibit an endo-endo conformation. Three identical branches formed by 1, 2-diaminoethane link the two tertiary amine groups. The protonation reactions ofcryptand (COBH) and its complex formation with copper (Ⅱ) were investigated by potentiometry in water and in a DMSO/water (80: 20 in mass ratio) mixture as solvents. The cryptand acts as a bis-base through its two Nbridgehead and exhibits a strong cooperativity that favors the first protonation and makes the second one difficult (pK 5.0 ). An inward rotation of the amide groups to form hydrogen bonds accounts for this cooperativity. The interaction of COBH with copper (Ⅱ) leads to several binuclear complex proton contents. 相似文献