Development of an ultrahard nanotwinned cBN micro tool for cutting hardened steel

被引：0
作者：
JunYun Chen
TianYe Jin
YongJun Tian
机构：
[1] Yanshan University,College of Vehicles and Energy
[2] Yanshan University,College of Mechanical Engineering
[3] Yanshan University,State Key Laboratory of Metastable Materials Science & Technology
来源：
Science China Technological Sciences | 2016年 / 59卷
关键词：
nanotwinned cBN; tool fabrication; cutting tool; micro machining; hardened steel;
D O I：
暂无
中图分类号：
学科分类号：
摘要：
Binderless nanotwinned cubic boron nitride (nt-cBN) synthesized from onion-structured BN precursors under high pressure and high temperature shows a very fine microstructure consisting of densely lamellar nanotwins (average thickness of 4 nm) within nanograins. The unique nanotwinned microstructure offers high hardness, wear resistance, fracture toughness, and thermal stability which are essential for advanced cBN tool materials. Thus, a circular micro tool of nt-cBN was fabricated using femtosecond laser contour machining followed by focused ion beam precision milling. Thereafter turning tests were performed on hardened steel using the studied micro tool. To evaluate the cutting performance, the machined surface quality and subsurface damage of the hardened steel were characterized. The wear mechanism of the nt-cBN micro tool was also investigated. It is found that the fabricated nt-cBN micro tool can generate high quality surface with surface roughness less than 7 nm and nanograin subsurface of about 500 nm deep. In addition, abrasive wear is found to be the dominant wear mechanism of the nt-cBN micro tool in turning hardened steel. These results indicate that nt-cBN has outstanding potential for ultra-precision cutting hardened steel.
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页码：876 / 881
页数：5
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共 49 条
  • [1] Inada A(2011)Micro cutting of ferrous materials using diamond tool under ionized coolant with carbon particles CIRP Ann Manuf Technol 60 97-100
  • [2] Min S(2009)Tool wear control in single-crystal diamond cutting of steel by using the ultra-intermittent cutting method Int J Mach Tool Manu 49 339-343
  • [3] Ohmori H(2014)A study of the diamond tool wear suppression mechanism in vibration-assisted machining of steel J Mater Process Tech 214 496-506
  • [4] Song Y C(2011)Experimental study on ultrasonic elliptical vibration cutting of hardened steel using PCD tools J Mater Process Tech 211 1701-1709
  • [5] Nezu K T(2015)Graphene oxide colloidal suspensions mitigate carbon diffusion during diamond turning of steel J Manuf Processes 17 41-47
  • [6] Park C H(2011)Surface integrity demands of high precision optical molds and realization by a new process chain Procedia Eng 19 40-43
  • [7] Zhang X Q(2006)Ultra-precision diamond cutting of steel molds CIRP Ann Manuf Technol 55 551-554
  • [8] Liu K(2016)High precision hard turning of AISI 52100 bearing steel Precis Eng 43 24-33
  • [9] Kumar A S(2003)Performance evaluation of pure CBN tools for machining of steel J Mater Process Tech 140 326-331
  • [10] Zhang X Q A(2009)Development of ultra-fine-grain binderless cBN tool for precision cutting of ferrous materials J Mater Process Tech 209 5646-5652
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