Journal of South China University of Technology (Natural Science Edition) ›› 2017, Vol. 45 ›› Issue (1): 137-144.doi: 10.3969/j.issn.1000-565X.2017.01.020

• Mechanical Engineering • Previous Articles    

Experimental Investigation into Surface Integrity of Titanium TC4 after Low-Plasticity Burnishing

YANG Dong1 LIU Zhan-qiang1 HE Meng1 PANG Ji-you2 YE Hong-tao2   

  1. 1.School of Mechanical Engineering//Key Laboratory of High Efficiency and Clean Mechanical Manufacture of the Ministry of Education,Shandong University,Jinan 250061,Shandong,China; 2.AEEC Shenyang Liming Aero-Engine Co.,Ltd.,Shenyang 110043,Liaoning,China
  • Received:2016-04-08 Revised:2016-08-08 Online:2017-01-25 Published:2016-12-01
  • Contact: 杨东( 1985-) ，男，博士生，主要从事高速加工表面完整性研究． E-mail:me_yangdong@yeah.net
  • About author:杨东( 1985-) ，男，博士生，主要从事高速加工表面完整性研究．
  • Supported by:
    Supported by the National Natural Science Foundation of China( 51425503， 51375272) and the National Science and Technology Major Project of China( 2015ZX04005008， 2014ZX04012014)

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Abstract:

Through single factor test method,the surface topography,micro-hardness distribution and residual stress of titanium TC4 after a low-plasticity burnishing are obtained by using an optical profiler,a micro-hardness tester and a residual stress test instrument,and the surface integrity of the burnished titanium TC4 is evaluated by using the standard data of the topography,roughness,micro-hardness and residual stress of surface.Then,the effects of low-plasticity burnishing parameters ( including burnishing speed,feed speed,hydraulic oil pressure and burnishing passes) on the surface integrity are analyzed comparatively.The results show that ( 1) the hydraulic oil pressure has the most significant effect on the topography,roughness,micro-hardness and residual stress of the burnished surface; ( 2) the surface roughness increases with the burnishing speed,and both the micro-hardness and the residual stress increase with the burnishing passes; and ( 3) higher hydraulic oil pressure and more burnishing passes help achieve a higher surface integrity in the low-plasticity burnishing of titanium TC4.

Key words: low plasticity burnishing, TC4, surface integrity, process parameter, experimental design

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