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Improvement of Drill Performance in Metal Cutting Using MoST Solid Lubricant Coatings
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作者 N.R. Thomas D.G. Teer s. hickman 《材料热处理学报》 EI CAS CSCD 北大核心 2004年第05B期870-874,共5页
Coated tools are widely used in today’s metal cutting industries and have significantly improved machining productivity through reducing operation costs and time. This paper presents the results of a systematic study... Coated tools are widely used in today’s metal cutting industries and have significantly improved machining productivity through reducing operation costs and time. This paper presents the results of a systematic study of the performance of HSS drills coated with CrTiAIN and drills with a top solid lubricant coating of MoST?. The tests were performed on a Haas vertical machining centre under wet and dry cutting conditions to machine through holes in medium carbon steel workpieces. The feed force and torque were recorded throughout some of the tests using a force dynamometer, while the tool wear was monitored and measured. It was found that MoST? coatings even under accelerated conditions improve the tool life significantly based on their unique properties and very low friction. 展开更多
关键词 金属切割 MOST 固态润滑剂 钻头
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地球物理测井观测的台湾车笼埔断层钻探项目(TCDP)井孔A的应力方向 被引量:4
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作者 Hung-Yu Wu Kuo-Fong Ma +6 位作者 M. Zoback N. Boness H. Ito Jih-Hao Hung s. hickman 万永革(译) 许忠淮(校) 《世界地震译丛》 2007年第1期33-38,共6页
台湾车笼埔断层钻探项目(TCDP)钻了2km深的井孔来研究1999年Mw7·6级集集地震中破裂的车笼埔断层的结构和力学状态。在500~1900m的深度进行了TCDP的地球物理测井,包括为了识别地层面的裂缝和剪切区域的双极声学成像(DSI)测井和地... 台湾车笼埔断层钻探项目(TCDP)钻了2km深的井孔来研究1999年Mw7·6级集集地震中破裂的车笼埔断层的结构和力学状态。在500~1900m的深度进行了TCDP的地球物理测井,包括为了识别地层面的裂缝和剪切区域的双极声学成像(DSI)测井和地层精细成像(FMI)测井。根据钻孔得到的连续岩芯资料,1110m深度的剪切区域被解释为车笼埔断层,位于锦水页岩内,延伸至1013~1300m的深度。整个井孔长度范围内观测到了应力导致的钻孔崩落。这些数据表明总的应力方向(N115°E)基本平行于区域应力场,并平行于菲律宾海板块相对于欧亚板块的俯冲方向。平均应力方向的可变性在不同深度均观测到。特别是在车笼埔断层附近有一个大的应力方向异常。1000m和1310m深度的突然应力偏转接近于锦水页岩的上边界和下边界,表明分层面在集集地震中滑动的可能性。 展开更多
关键词 地球物理测井 车笼埔断层 应力方向 井孔 观测 钻探 台湾省 菲律宾海板块
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