Experimental Study on Bit Tooth Made of Nano-Cemented Carbide Composites in Air Hammer Drilling

Abstract:

Article Preview

It is fracture, wear and abscission of bit tooth that make up of the main failure forms for the air hammer bit, which have badly restricted the further popularization and application of the air hammer drilling. The main reason is that the ordinary cemented carbide tooth is difficult to meet the complex conditions of the air the hammer drilling. Therefore, this research puts forward a new thought that we strengthen the carbide tooth by adding the nano-Al2O3 into the substrate materials of WC-Co. According to the study of several formulas of nano-composites, the test of sample performance, experimental study of impact abrasive wear and microstructure, we draw some conclusions that adding amount of nano-Al2O3 can refine grain, make microstructure more uniform and improve the wear resistance of composites, but also can enhance the strength of boundaries of WC-Co and transform the fracture form from the intergranular fracture to the transgranular fracture. Meanwhile, it can also improve nano-composites comprehensive performance by adding rare earth. The result for site test of bit shows that comparing with the bit equipped the original carbide teeth, the efficiency of rock breaking of the bit equipped nano-composites teeth increase by 20% and the service life increase by 80%.

Info:

Periodical:

Advanced Materials Research (Volumes 233-235)

Edited by:

Zhong Cao, Lixian Sun, Xueqiang Cao, Yinghe He

Pages:

2955-2961

DOI:

10.4028/www.scientific.net/AMR.233-235.2955

Citation:

Z. Q. Huang et al., "Experimental Study on Bit Tooth Made of Nano-Cemented Carbide Composites in Air Hammer Drilling", Advanced Materials Research, Vols. 233-235, pp. 2955-2961, 2011

Online since:

May 2011

Export:

Price:

$35.00

[1] Fengsheng Li, Yin Yang. National Defence Industry Press, June 2003. In Chinese.

[2] Stan Vepřek. preparation, properties and Industrial applications. NATO Science Series II: Mathematics, Physics and Chemistry, 2006, 155: 23-34.

[3] Lili Wang, Ning Liu. Cemented Carbide, 2010, 27(2): 71-77. In Chinese.

[4] Jicai Kuai, Feihu Zhang. Optics and Precision Engineering, 2010, 18(2): 406-410. In Chinese.

[5] Juan Liu, Zhu Wang. heat treatment technology and equipment, 2009, 30(5): 11-15. In Chinese.

[6] Jialiang Zhang. Nanoscience & Technology, 2004, 14-20. In Chinese.

[7] Zhuang Ma, Jifeng Zou. based nanostructured ceramic coatings on magnesium alloy surface by thermal spraying. Ordnance Material Science and Engineering, 2010, 33(4): 40-42. In Chinese.

[8] Dongsheng Liu, Xiwei Xiao. Powder Metallurgy Industry, 2004, 14(2): 32-34. In Chinese.

[9] Ma Pengfei, Liu Yan. Guangdong Chemical Industry, 2010, 37(5): 43-44. In Chinese.

[10] Huiping Wang, Maozhong Hu. China Tungsten Industry, 2001, 16(2): 30-32. In Chinese.

[11] Yonghui Zhou, Xin Ai. Journal of Synthetic Crystals, 2008, 37(4): 809-813. In Chinese.

[12] Ruixia Shi, Yan Yi. Journal of Synthetic Crystals, 2008, 37(3): 753-758. In Chinese.

[13] Jun Zhao, Zhi Wang. Journal of University of Jinan(Science and Technology, 2009, 23(2): 139-140. In Chinese.

[14] J. S LIN, Y MIYAMOTO, K TANIHATA, YAMAMOTO and R TANAKA. Journal of Materials Science, 1998, 33( 4): 869-876.

DOI: 10.1023/a:1004387106356

[15] Zhigang Fang, Greg Lockwood and Anthony Griffo. A dual composite of WC-Co. Metallurgical and Materials Transactions A, 1990, 30(12): 3231-3238.

DOI: 10.1007/s11661-999-0233-3

[16] Zhi Wang, Jun Zhao. Journal of Synthetic Crystals, 2009, 38(supplement): 238-241. In Chinese.

In order to see related information, you need to Login.