共查询到20条相似文献,搜索用时 8 毫秒
1.
重点阐述了济钢原有的销售渠道带来的弊端和现有销售模式的创新。通过直供销售,缩短了销售链,减少了销售成本和费用,扩大了销售网络,大大提高了济钢的经济效益和社会效益,深得用户的好评。 相似文献
2.
氨浸液中游离氨对钼酸铵生产的影响 总被引:2,自引:2,他引:0
论述了钼酸铵中氨浸液的组成及主要组分的赋存状态,提出了氨浸液中游离氨浓度与钼酸铵生产的关系和作用机理,从理论和应用方面作了深入探讨。 相似文献
3.
介绍了用自来水的供水压力替换液压油做动力源 ,运用到舞台升降机构中 ,取得了良好效果。探讨了在类似机构中使用自来水。 相似文献
4.
受市场大环境影响,产能过剩的钢铁企业利润空间狭小。本文通过分析太阳能级多晶硅市场,比较化学法与冶金法两种提纯多晶硅的方法;论述钢铁企业发展冶金法生产多晶硅在人力资源、设备、物流、生产经营等诸方面的优势;提出中小型钢铁企业将部分钢铁产能转型到冶炼太阳能级多晶硅的设想,并针对太阳能光伏市场提出企业尽快占领高纯度石英矿的建议。 相似文献
5.
6.
7.
在全球钢铁企业中,LNM集团是一家另类的公司.它的发展壮大完全靠低价收购一系列基础良好但经营不佳而处于困境中的钢铁企业,随之进行现代化改造,使其迅速盈利.阐述了LNM发展壮大的过程,指出了其收购、运作的特征,在此基础上提出了几点思考. 相似文献
8.
在现场调查和统计的基础上,分析了青川县东河口地震型崩塌体200余块块石沿转折型沟谷的分布特征和各不同体积组块石的分布特征.提出块石拦截率概念,并据此从数量和体积2个角度定量分析了沟谷拐弯段对块石的拦截效果.分析认为:转折型沟谷在控制块石的运移方面具有积极作用;相比小体积块石,沟谷拐弯段对大体积块石具有更好的拦截效果;从数量上来看,沟谷内靠近崩塌堆积体后壁的拐弯拦截块石相对较少.本文的分析思路及方法为认识和研究转折型构筑物及其拐弯在控制崩塌体运移等方面提供参考,所得结论为人类防治崩塌灾害等方面提供借鉴. 相似文献
9.
《粉末冶金学》2013,56(20):221-238
AbstractThe paper traces the dependence of consistent quality in high-density components on the preparative history of the powder used in fabrication, taking uranium dioxide as an example. Consistent dimensions imply consistent densities, microstructures, &c., and the influence of powder quality on these properties is discussed. The chemistry of uranyl nitrate precipitation with ammonia is described with reference to the powder characteristics of the product and the way in which these are modified by subsequent thermal and mechanical treatments, such as hydrogen reduction and micronizing.In the high-throughput production of uranium dioxide solid cylinders for nuclear fuel elements, automatic presses. are used; the requirements for granulation and binder addition to ensure a smooth and consistent feed to the presses are considered, together with the precautions necessary in removal of the binder to avoid subsequent distortion of the pellet on sintering.In the U.K.A.E.A., such pellets are made on the ton scale and the typical dimensional spread on as-sintered pellets is ± 1% on components of ~0·5 in. dia.; this is a considerable achievement, considering that the shrinkage of a component on sintering is some 40 vol.-%. Final sizing, for instance on centreless grinders, reduces the dimensional spread to ± 0·0005 in.The experience gained in studying uranium dioxide fabrication is translatable to other special (i.e. non-silicate) ceramics and to metal powders, as illustrated by work at Springfields on beryllia and alumina. 相似文献
10.
11.
对当前中国钢铁业面临的内外环境进行了分析,并指出中国钢铁业实现由大到强转型需要迈过三道槛:平衡发展模式、国际化、资源环境,而跨越转型门槛的唯一推动力就是创新。 相似文献
12.
Cu—Zn—Al合金中转变的正电子湮没研究 总被引:3,自引:0,他引:3
本文用正电子湮没Doppler展宽能谱和其它相关技术分析Cu-23 at%Zn-10 at%Al形状记忆合金不同温度淬火后的试样表明,该合金除了于700~600℃有α相变外,在550~500℃和300~250℃还有两个转变,前者可能是无序β相向有序B_2相的转变,后者可能是有序B_2相向有序DO_3相的转变。正电子湮没Doppler展宽能谱对。相变不敏感,但对有序转变敏感。 相似文献
13.
《粉末冶金学》2013,56(1-2):145-171
AbstractThe binary systems of silicides of the high-melting-point transition metals are now well understood, except for the hafnium-silicon system. Research since 1954 is reviewed, with particular reference to the compound Me5Si3 and its position in the silicide systems. Reference is also made to the pseudo-binary and pseudo-ternary silicide systems.The structures of many of the intermetallic phases in the binary boride systems have now been determined, but complete equilibrium diagrams still remain to be established in some cases. New tentative diagrams are given for the systems vanadium–boron, niobium–boron, and tantalum–boron, and structures are suggested for the borides V3B2, Nb3B2, and Ta3B2 with the T2 structure (isostructural with U3Si2).Ternary alloys of the systems Me–Si–B are of great interest, not only structurally but also for practical reasons. The complete systems Me–Si–B of Group VI (Mo–Si–B and W–Si–B) have accordingly been studied by X-ray, thermal-analysis, and micrographic methods. The system Cr–Si–B has been determined and attention is directed to the possible commercial applications of certain alloys containing additions of metals of the iron group, in particular nickel, for sprayed coatings resistant to liquid aluminium.The question of cementing silicides and borides with metals and alloys is discussed theoretically. The character of the silicide or boride system in question and the behaviour of the intermediate phase in relation to the bonding material are of decisive importance for the selection of the latter. Only very limited data are to be found in the literature on the behaviour of silicides and borides in relation to metals and alloys. Alloys based on TiB2, ZrB2, MoSi2, and WSi2, impregnated with numerous metals and alloys, have been prepared. Their structures have been studied and the technical suitability of various combinations is discussed on the basis of their technological properties. 相似文献
14.
以向心滚动轴承为例,通过对滚动轴承的受力分析,定性定量地阐述了滚动轴承各元件寿命的不一致性,提出了延长滚动轴承整体使用寿命的方法。 相似文献
15.
16.
17.
18.
“西气东输”是我国西部大开发的标志性工程,这一项目已经引起了国内外的广泛关注。开发管线用钢不仅具有重大的现实意义,而且也可为提高我国钢铁工业整体水平做出贡献。 相似文献
19.