Investigation of Surface Integrity on TC4-DT in High Speed Grinding with CBN Wheel

Abstract:

A series of grinding experiments were carried out with CBN wheel to focus on the surface integrity of titanium alloy TC4-DT in high speed grinding . In order to get the proper process parameters to control the surface integrity of the TC4-DT, surface roughness, subsurface morphology and microhardness variations have been studied. In addition to the use of CBN wheel, scanning electron microscopy (SEM), 3-d contour instrument and microhardness tester was applied. The results show that the surface roughness is decreased obviously when grinding wheel linear velocity rises from 60m/s to 80m/s. While the grinding speed rises from 80m/s to 100m/s, the surface roughness value increases slightly. Moreover, the surface roughness value increases with the grinding depth and the increasing trend is obvious in the process of machining. The microstructure analysis shows that during high speed grinding with CBN wheels, good quality surface with 10μm grinding depth can be obtained. Table feed rate has weak influence on the grinding surface topography. The microhardness analysis indicates that surface microhardness increases sharply with the increasing of grinding wheel linear velocity in high speed grinding.

• Periodical: Advanced Materials Research (Volume 1027)
• Pages: 140-145
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.1027.140
• Online since: October 2014
• Authors: Yao Guang Chen, Wen Zhuang Lu*, Jun Xu, Yan Song Zhu, Dun Wen Zuo
• Keywords: Grinding, Surface Integrity, TC4-DT

References

[1] Xu X P, Yu Y Q, Xu H J. Effect of grinding temperatures on the surface integrity of a nickel-based superalloy. Journal of Materials Processing Technology 2002; 129(1-3): 359-363.

DOI: 10.1016/s0924-0136(02)00656-8

[2] Osterle W, Li X P. Mechanical and thermal response of a nickel-base superalloy upon grinding with high removal rates. Materials Science and Engineering A 1997; 238(2): 357-366.

DOI: 10.1016/s0921-5093(97)00457-7

[3] Xu X p, Yu Y Q, Huang H. Mechanisms of abrasive wear in the grinding of titanium (TC4) and nickel(K417) alloys. Wear, 2003, 255: 1421-1426.

DOI: 10.1016/s0043-1648(03)00163-7

[4] Yu X Q. Material removal mechanisms in grinding aeronautical alloys, part1: Experiments and results. Key Engineering Materials, 2004(259): 318-323.

DOI: 10.4028/www.scientific.net/kem.259-260.318

[5] Ren J X, Kang R K, Wu X L, et al. Grinding Burn and Crack of Titanium Alloy. Manufacturing Technology & Machine Tool, 2000(10): 40-42. [in Chinese].

[6] Zhang X F, Zhang H X, Chen Y. Development of vitrified CBN grinding wheel for grinding titanium alloy, New Technology process, 2006(9): 37-39. [in Chinese].

[7] Ren J X, Kang R K, Shi X K. Grinding of difficult-to-cut materials. Beijing: National Defence Industry Press, 1999: 55-62. [in Chinese].

[8] R. Hood, F. Lechner, D. K. Aspinwall, et al. Creep feed grinding of gamma titanium aluminized and burn resistant. International Journal of Machine Tools & Manufacture, 2007, 47: 1486-1492.

DOI: 10.1016/j.ijmachtools.2006.10.008

[9] Tan M T, Wei Y S. High speed grinding difficult-to-cut materials . Machine, 1981(1): 24-28. [in Chinese].

[10] Editorial Committee. China aeronautical materials handbook. Beijing: Standards Press of China, 2002. [in Chinese].

[11] Wood R A, Favor R J. Titanium alloys handbook. BATTELLE COLUMBUS LABS OHIO METALS AND CERAMICS INFORMATION CENTER, (1972).

[12] Xu J, Lu W Z, et al. Experimental research on high speed grinding damage tolerance TC4-DT alloy with CBN wheel. Diamond & Abrasives Engineering 2013; 33(5): 12-16. [in Chinese].