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1.
人造卡邦金刚石生长受成压力、温度等条件的直接影响,从触媒金属向石墨中浸渍,石墨向金刚石结构转化、金刚石子晶生长三个方面讨论了人造卡邦金刚石的生长特性,根据人造卡邦金刚石生长规律,研究用不同的工艺方法,设计生长具有不同特点和用途的人造卡邦金刚石聚晶体。  相似文献   

2.
胡中立 《地质与勘探》1994,30(4):80-80,F003,52
详细介绍了低温电镀人造金刚石孕镶钻头在“打滑“地层中试用比热压人造金刚石和热压天然金刚石孕镶钻头技术经济效益高的情况,分析了该种钻头时效高、成本低、胎体磨损快,缘于电镀工艺特点和胎体合金成分诸因素,提出了在钻进中防止过快磨损的措施和途径。  相似文献   

3.
通过对人造金刚石进行整形处理,采用适当的工艺,把连聚晶分离成单晶,对不规则的晶体进行浑圆化处理。整形后人造金刚石的连聚晶可控制在5%左右,经分选后可选出一定比例的高品级金刚石,既保证了金刚石质量的稳定性,又创造了较好的经济效益。  相似文献   

4.
通过对人造金刚石进行整形处理,采用适当的工艺,把连聚晶分离成单晶,对不规则的晶体进行浑圆化处理。整形后人造金刚石的连聚晶可控制在5%左右,经分选后可选出一定比例的高品级金刚石,既保证了金刚石质量的稳定性,又创造了较好的经济效益。  相似文献   

5.
隆威  宋孝龙 《探矿工程》1992,(2):26-27,33
一、问题的提出随着人造金刚石钻探方法的推广,润滑钻井液的使用越来越广泛,其具有润滑冷却效果好、成本低、适用性较广泛等优点。人们认为润滑剂的主要作用就是减小钻杆(具)与岩石之间的摩擦阻力。其实,润滑钻井液在降低钻杆回转阻力的同时,还减小了人造金刚石钻头与岩石之间的摩擦阻力,提高了钻头的钻进效率和寿命。对于这一点,人们的认识还不一致,存  相似文献   

6.
文中综述了世界金刚石的生产情况,分析了人造金刚石产量增长的原因,介绍了国外在人造金刚石合成技术、金刚石的提纯、提高金刚石强度的方法,以及钻头用金刚石的粒度和钻头设计等方面的最新进展.  相似文献   

7.
2003年国外人造金刚石获新进展,我们怎么办?   总被引:2,自引:0,他引:2       下载免费PDF全文
刘广志 《探矿工程》2003,30(5):67-68
2003年,国外人造金刚石获得2项突破性进展——俄罗斯生产出性能超过金刚石的大分子三维聚合物,日本研发出超高硬度人造金刚石。为此,提出了改变我国合成金刚石工业停滞不前局面的建议。  相似文献   

8.
提高人造金刚石单晶质量   总被引:1,自引:0,他引:1  
从设备的更新,原材料质量的提高,人造金刚石合成工艺的改进等方面,对如何提高金刚石单晶质量进行了探讨。  相似文献   

9.
论述了我国人造金刚石行业的现状以及与世界人造金刚石工业之间存在的差距。提出了我国发展人造金刚石的潜力和对策。  相似文献   

10.
人造金刚石于70年代开始在我国地质钻探中推广应用。除人造金刚石单晶外,还采用了聚晶,复合片以及其它烧本或镶嵌体。所有这些大大地推动了我国钻探工程的技术进步。  相似文献   

11.
Calcite samples were extracted both from the rock matrix and the superficial coating of a karstified fault plane of an underground quarry, located in the eastern border of the Paris basin. The karstification is dated as Quaternary. Analysis of mechanical calcite twinning reveals that only the calcite matrix has also undergone a compression trending WNW that can be attributed to the Mio-Pliocene alpine collision. Both coating and matrix have undergone a strike-slip regime with σ1 roughly trending north–south, that could correspond to the regional present-day state of stress, a strike-slip compression rather trending NNW, modified by local phenomena. To cite this article: M. Rocher et al., C. R. Geoscience 335 (2003).  相似文献   

12.
HYDROGEOLOGY     
正20141756 Chen Ruige(Mathematical College,China University of Geosciences,Beijing100083,China);Zhou Xun Numerical Simulation of Groundwater Level Fluctuation in a Coastal Confined Aquifer with Sloping Initial Groundwater Level Induced by the Tide(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(7),2013,p.1099-1104,6 illus.,16 refs.) Key words:confined water,groundwater level  相似文献   

13.
正20141408 Cai Jia(Institute of Geology,Chinese Academy of Geological Sciences,Beijing100037,China);Liu Fulai Petrogenesis and Metamorphic P-T Conditions of Garnet-Spinel-Biotitebearing Paragneiss in Danangou Area,Daqingshan-Wulashan Metamorphic Complex Belt(Acta Petrologica Sinica,ISSN1000-0569,CN11-1922/P,29(7),  相似文献   

14.
15.
正20142386An Guoying(China Aero Geophysical Survey and Remote Sensing Center for Land and Resources,Beijing 100083,China)Application of Satellite Remote Sensing in Regional Hydrogeological Investigation:Taking Cenozoic Strata in Wenquan Sheet(1∶250 000)of Karakoram Range as an Example(Geosci-  相似文献   

16.
正20141016An Chengbang(Key Laboratory of Western China’s Environmental Systems,Ministry of Education,Lanzhou University,Lanzhou 730000,China);Zhao Yongtao Lake Records during the Last Glacial Maximum from Xinjiang,NW China and Their Climatic Impli-  相似文献   

17.
正20141538 Cao Qing(School of Earth Sciences and Engineering,Xi’an Petroleum University,Xi’an 710065,China);Zhao Jingzhou Characteristics and Significance of Fluid Inclusions from Majiagou Formation,Yichuan Huangling Area,Ordos Basin(Advances in Earth Science,ISSN1001-8166,CN62-1091/P,28(7),2013,p.819-828,7 illus.,3 tables,43 refs.)  相似文献   

18.
GEOCHEMISTRY     
正20142002 Wei Hualing(Institute of Geophysical and Geochemical Exploration,Chinese Academy of Geological Sciences,Langfang065000,China);Zhou Guohua Element Content and Mineral Compositions in Different Sizes of Soil in Tongling Area,Anhui Province(Geological Bulletin of China,ISSN1671-2552,CN11-4648/P,32(11),2013,p.1861  相似文献   

19.
正20141768 An Shaopeng(Institute of Rock and Soil Mechannics,Chinese Academy of Sciences,Wuhan 430071,China);Wei Lide Experimental Study on Mechanical Behavior of Xigeda Formation Siltstone and Structure Interface(Journal of Engineering Geology,ISSN1004-9665,CN11-3249/P,21(5),2013,p.702-708,9illus.,1 table,16 refs.)  相似文献   

20.
正20140985Chen Liang(Post-Doctoral Research Station of Mining Engineering,School of Nuclear Resources and Nuclear Fuel Engineering,University of South China,Heng-yang 421001,China);Huang Wei Composition of Major and Correlated Elements with Organic Matters and Paleoclimatic Implication for Lower Paleogene Sediments in Sanshui Basin  相似文献   

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