Effect of Alumina Bubbles on Mechanical Properties and Microstructure of Metal Bond for Superabrasive Grinding Wheels

Abstract:

Effect of the pore size and volume fraction of alumina bubbles on the mechanical properties and microstructure of metal bond for superabrasive grinding wheels were studied by means of single factor test. The results showed that the mechanical strength reduced with the increase of bubble size and volume fraction of alumina bubbles. The morphology of the center section of the binder matrix showed that the higher the volume fraction of alumina bubbles was the less the effective area rate of the matrix was. Additionally, the bigger the bubble size was the more inhomogeneous the bubbles distributed. The pores generated after the fracture of the alumina bubbles had a regular shape and size which satisfied the chip space requirement of the wheels. At last, the failure condition of the bond matrix was established, which indicated that the strength of the bond matrix is mainly related to the effective area rate and the homogeneity of the bubble distribution.

• Periodical: Advanced Materials Research (Volumes 887-888)
• Pages: 1227-1231
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.887-888.1227
• Online since: February 2014
• Authors: Chang Yu Ma, Wen Feng Ding*, Zhen zhen Chen, Hong Hua Su, Yu Can Fu, Jiu Hua Xu
• Keywords: Alumina Bubble, Failure Condition, Mechanical Property, Metal Bond

References

[1] Tanaka T. New development of metal bonded diamond wheel with pore by the growth of bonding bridge. Precision Engineering. Vol. 26(1) (1992), pp.27-32.

[2] Tomino H, Tsukuda A, Kondo Y, et al. Influence of porosity on grinding performance of porous cast-iron bonded diamond grinding wheel made by pluse current sintering method. Journal of the Japan Society of Powder and Powder Metallurgy. Vol. 46(3) (1999).

DOI: 10.2497/jjspm.46.257

[3] Truong SH, Isono Y, Tanaka T. Scanning electron microscopic study and mechanical property examination of a bond bridge: development of a porous metal bonded diamond wheel. Journal of Materials Processing Technology. Vol. 89-90(1999), pp.385-391.

DOI: 10.1016/s0924-0136(99)00004-7

[4] Su HH, Xu HJ, Xiao B, et al. Microstructure and performance of porous Ni-Cr alloy bonded diamond grinding wheel. Materials Science Forum. Vol. 532-533(2006), pp.373-376.

DOI: 10.4028/www.scientific.net/msf.532-533.373

[5] Ding WF, Xu JH, Chen ZZ, et al. Fabrication and performance of porous metal-bonded CBN grinding wheels using alumina bubble particles as pore-forming agents. International Journal of Advanced Manufacturing Technology. Vol. 67(2013), pp.1309-1315.

DOI: 10.1007/s00170-012-4567-4

[6] Tang LP. A study of the quantitative relationship between strength and pore-size distribution of porous materials. Cement and Concrete Research. Vol. 16(1)(1986), pp.87-96.

DOI: 10.1016/0008-8846(86)90072-4