电镀人造金刚石圆锯片的研制

本文简要介绍了低温电镀工艺生产大直径金刚石圆锯片的研究结果。对Ni-Co合金成分等主要影响因素进行了讨论。无论选用新基片还是旧基片（原用热压法生产的金刚石锯片）该工艺均能生产出高质量的金刚石锯片。所得电镀金刚石圆锯片的使用结果表明,切割寿命为热压法金刚石锯片的2.8倍。该工艺所需设备简单、投资少、成本低。     

金刚石镀铜工艺研究

研究金刚石表面镀铜工艺，金刚石经净化、粗化、亲水化处理后，首先以盐基型胶体钯对其表面敏化活化，进行化学镀铜形成金属表层，然后以机械滚镀方式在其表面进行电镀加厚。镀铜后的金刚石抗压强度提高显著，表面理化性质大为改善，削弱了金刚石固有缺点可能产生的不利影响，为生产性能良好和高寿命的树脂结合剂和金属结合剂金刚石工具创造了前提条件     

电镀PDC石油全面钻头及其在油气田中的应用

采用低温电镀工艺生产PDC石油全面钻头对金刚石无任何热损伤，对喷咀进行组合设计，在两口井中进行试验，取得了很好的经济效益和社会效益，并分析了钻头的特点及存在的问题。     

摩擦材料磨削用金刚石磨具研制及应用

采用金刚石磨具替代普通磨具磨削磨擦材料，不仅加工质量提高，而且经济效益显著。     

金刚石表面金属化在金刚石钻头制造中的应用研究

通过先对金刚石进行预处理，之后采用化学镀方法镀一层Ni-W-P合金膜，再采用电镀方法，镀一层Fe－W合金或Cr金属膜。镀覆合金膜的金刚石经过热压烧结工艺过程，合金膜能同金刚石实现强碳化物冶金结合，能同股体金属生成高性能的合金体，实现牢固的包镶，达到提高金刚石钻头使用寿命的目的。     

中国电镀金刚石钻头的研究与应用

采用低温工艺制造金刚石钻头并成功用于钻探工业，在世界范围内我国属于首创。较全面地介绍了我国电镀金刚石钻头的制造工艺特点，为适应各种地层钻进需要而研制的钻头种类以及应用于地质钻探领域和延伸到其它工业部门的使用效果。     

《电镀金刚石钻头》介绍

用电镀工艺制造金刚石钻头虽然在国外文献中报导得较早，但真正在工业规模上成功地使用，还是我国首先突破的。由于这种制造流程简单，适于制造各种复杂唇面形状的钻头，由于是以室温条件下进行电化学反应，所以对金刚石无热损害现象，而且金钢石在电化学作用下，在胎体金属上包嵌牢固，因而电镀钻头具有高的钻头寿命，适用范围广，具有良好的时效，已成为制造金钢石钻头重要方法之一。李大佛同志是较早的长期从事电镀钻头研究和制造者之一，并且在这方面取得了显著的成绩，本书就是他在这方面理论研究和生产实践的总结。     

奶油白大理石树脂磨具的研制与试验

本文对上海大理石厂加工奶油白大理石的磨具进行了分析，指出其所存在的问题，并提出了新配方，通过试验，分析了新磨具成形压力对其硬度和磨削工艺参数对其磨削性能的影响，并在此基础上选出合理的磨削工艺参数，实践表明，新磨具质量接近国际先进水平，而价格仅为同类磨具的三分之一。     

一种制作金刚石磨具的新方法

本文介绍一种制作金刚石磨具的改进方法。它的特点是: 1.用此法制成的磨具具有能控制硬度或柔软度的浸渗结构; 2.磨具衬底和金刚石磨料部分用两级烧结浸渗法结合在一起; 3.磨具的金属衬底和粘附磨料部分的金属粉末雏形同时烧结,并在一级烧结完成之后,继续加热熔化衬底中的浸渗剂,以充填金刚石磨料部分的孔隙,制成完整的磨具。     

电镀钻头中金刚石的选用原则

金刚石是电镀钻头主要的钻进和切削元件,其性能的好坏对钻头的工作效率和使用寿命有着直接的影响。要充分了解金刚石的性能,掌握并利用各种检测手段,才能合理选择出性价比高,又能满足钻头需要的金刚石。主要对金刚石的性能和检测方法以及电镀钻头中如何选用金刚石进行了介绍。     

Current situation and future trend of China rare earth luminescent material industry

<正>Rare earth luminescent material is one of the most important application sectors of rare earths.China enjoys the exceptional advantage to develop rare earth luminescent material for its abundant rare earth resources.After several decades'endeavor,China's rare earth luminescent material industry,headed by rare earth phosphor for lamp and LED and high efficient rare earth energy-saving light source,has been gradually developed into a scale industry.China has become a major production base of rare earth phosphor for lamps and rare earth     

China rare earth market review

正June 1~10,2014Rare earth market remained weak.Quoted price of rare earth products was similar to that in May.There was no sign of recovery in downstream market.The market of NdFeB magnetic materials and phosphor was depressed.Catalyst,polishing powder and ceramic industries remained inactive.Demand from downstream industry was soft.Consumers purchased on their needs.Suppliers had strong intention to sell.Prices of rare earth products     

Annual Report analysis of Chinese rare earth-related listed companies in 2013

<正>Chinese rare earth-related listed companies have published their 2013 annual reports.It can be understood from their reports that production and operation activities of Chinese rare earth-related companies were still heavily affected by macro economy and industrial policies.They basically followed the steps of national economy.In 2013,world economy recovered slowly but the economy     

Market opportunities and challenges for rare earth polishing powder

正1.Status of rare earth polishing powder Rare earth polishing powder with high content of cerium oxide began to replace iron oxide for glass polishing and became one of the key materials in glass polishing process since 1940.Compared with traditional iron oxide,rare earth polishing powder has many advantages,such as fast polishing rate,high polishing quality and long service life.It can achieve good surface quality and improve operation conditions.For example,in lens polishing,the polishing work that cerium     

Baotou Research Institute of Rare Earths developed a new RE alloy preparation technology

正Pyrometallurgy Laboratory of Baotou Research Institute of Rare Earths had independently developed a new preparation technology of rare earth alloy for NdFeB.The alloy can remarkably enhance the coercivity of NdFeB magnet but also evidently reduce the production cost of the magnet.The new master alloy was prepared in the kA pilot-scale electrolytic cell by the independent technology.The rare earth master alloy can be used as the raw material for NdFeB.Compared     

Market and recycling of NiMH battery

<正>Market status and future trend of NiMH battery1.Global market of small NiMH battery Global market size of small NiMH batteries declined year on year since 2011.The trend will continue to 2018,at the rate of 5%to 10%annually.Demand for small NiMH batteries will be stable gradually.Many electrical apparatuses are powered by the built-in lithium battery today,which is the main reason for the shrunk market of small NiMH batteries.But,for some products,small NiMH     

China rare earth market review

正September 1-10,2014 Affected by the National Day holiday,rare earth transaction was stagnant and the market showed a weak steady state.As there was no good news for downstream market,some products with flat demand would likely rally slightly for some time to     

2014 second batch of rare earth quota released

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矿用防爆轴流对旋主要通风机叶片ANSYS模态分析及应用

高效节能矿用防爆对旋主要通风机的叶片是主要通风机运行的关键部件,叶片在运行时不断受到气流的作用力,从而使叶片产生振动,当叶片振动的频率与叶片的固有频率接近时,容易产生共振从而导致叶片的断裂。一旦叶片断裂时,对主要通风机的安全运行产生致命的影响,从而导致矿山、化工等企业发生重大事故,将会产生不可估量的损失。基于有限元分析软件ANSYS,对高效节能矿用防爆轴流对旋主要通风机叶片进行模态分析及产生对应的六阶模态频率,对主要通风机叶片的运行频率、固有频率及产生的共振问题进行了原理分析,并且解决了叶片频率共振的问题,从而为主要通风机叶片结构设计提供理论依据,并对主要通风机叶片的安全运行提供保障。     

2013 NdFeB export analysis

<正>China totally exported nearly 24,000 tonsof NdFeB products during 201 3,including 18,825 tons of permanent magnet,valued USD 1.34 billion at an average price of 71.4 USD/kg;3,277 tons of NdFeB magnetic powder,valued USD 1 01 million at an average price of 30.9 USD/kg;1,334 tons of strip casting ribbon,with total export value of USD 74million at an average price of 55.3 USD/kg;and 586