Study on Performance of Hot Pressed High Phosphorus-Boron Iron-Based Bit Matrix and Diamond Bit

Abstract:

Formula uniform design method was adopted to study the performance of iron-based matrix with high content of phosphorus and boron. Two forms of regression models on matrix hardness and wear resistance and the optimum matrix formulae were obtained respectively by regression analysis and constrained nonlinear programming using MATLAB. Regression analyses indicate that matrix hardness was mainly affected by the factor of Ni, Co and Fe; matrix hardness and brittleness increased with the increment of P-Fe alloy, but decreased with the increase of 663-Cu. These results can be used as a rough guide for design of highly adaptive diamond bits for different rock formations. After the indoor experiments, diamond bit based on 3# matrix formula was made to perform field drilling tests. The results were that the penetration rate was 1.91m/h and the average diamond bit life was 67.37m.

• Periodical: Key Engineering Materials (Volume 416)
• Pages: 386-390
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.416.386
• Online since: September 2009
• Authors: Zhan Yang, Bing Suo Pan, Kai Hua Yang
• Keywords: Bonding Strength, Brittleness, Formula Uniform Design, Hardness, High Phosphorus-Boron Iron Alloy

References

[1] K.H. Yang, L.C. Duan and F.L. Tang: Research on �ew Type of Diamond Tools (University of Geosciences Press, China 2001), pp.131-132.

[2] K.T. Fang: Uniform Design and Uniform Design Table (Science Press, China 1994), pp.55-60.

[3] K.T. Fang: Practical Method of Regression Analysis (Science Press, China 1988). p.204.

[4] Z. Yang and F.L. Tang: Proc. International Conference on Geological Engineering (Wuhan, China, October 10-15, 2007).