Metallurgical Investigation of the Collapsed Front Structure of a Dragline in a Coal Mine
Technical Article---Peer-Reviewed
First Online:
- 33 Downloads
Abstract
A dragline is the largest mobile equipment on earth, and it is called the “kingpin” of any mine site. In this present investigation, a case of premature failure of a coal-handling dragline is discussed. Failure occurred in a linked component known as “thimble,” which connects the A-frame and the vertical mast of the dragline. The thimble was broken into two halves and caused the entire front structures of the dragline to collapse. Failure investigation was performed through visual examination, chemical analysis, metallography, mechanical property evaluation and fractography.
Keywords
Dragline Fatigue failure Weld defects Fractography MicrostructureNotes
Acknowledgments
Authors are thankful to the Director, CSIR-National Metallurgical Laboratory, Jamshedpur, for his kind motivation and permission to publish this work.
References
- 1.R.J. Mckinnell, Assessment of critical dragline boom suspension components: an essential for planned replacement policy. Int. J. Press. Ves. Pip. 61, 349–365 (1995)CrossRefGoogle Scholar
- 2.R. Jones, C. Wallbrink, M. Tan, P. Reichl, D. Dayawansa, Health monitoring of draglines using ultrasonic waves. Eng. Fail. Anal. 11, 257–266 (2004)CrossRefGoogle Scholar
- 3.V.R. Ranganath, G. Das, S. Tarafder, Swapan K. Das, Failure of a swing pinion shaft of a dragline. Eng. Fail. Anal. 11, 599–604 (2004)CrossRefGoogle Scholar
- 4.S. Joshi, J.W.H. Price, A comparative study on application of design codes for prediction of fatigue life of a mining dragline cluster. Eng. Fail. Anal. 16, 1562–1569 (2009)CrossRefGoogle Scholar
- 5.Ying Li, Wenyuan Liu, Dynamic dragline modeling for operation performance simulation and fatigue life prediction. Eng. Fail. Anal. 34, 93–101 (2013)CrossRefGoogle Scholar
- 6.P. Munda, S. Kumar, A. Prakash, M.M. Husain, V. Rajnikanth, S. Ghosh Chowdhury, Failure investigation of boiler water wall tubes of a thermal power station. J. Fail. Anal. Prev. 16(1), 9–18 (2016)CrossRefGoogle Scholar
- 7.ASM Hand book, Failure Analysis and Prevention, vol. 11 (AMS International, Materials Park, 2002), pp. 156–191Google Scholar
- 8.P. Dayawansa, G. Chitty, B. Kerezsi, H. Bartosiewicz, J.H.W. Price, Fracture mechanics of mining dragline booms. Eng. Fail. Anal. 13, 716–725 (2006)CrossRefGoogle Scholar
- 9.G.E. Dieter, Mechanical Metallurgy (McGraw-Hill Publication, New York, 1986), pp. 375–430Google Scholar
- 10.Metals Hand book, Properties and Selection: Irons Steels and High Performance Alloys, vol. 1 (AMS International, Materials Park, 1990), pp. 185–189Google Scholar
- 11.S.E. Offerman, N.H. van Dijk, M.T. Rekveldt, J. Sietsma, S. van der Zwaag, Ferrite/pearlite band formation in hot rolled medium carbon steel. Mater. Sci. Technol. 18, 297–303 (2002)CrossRefGoogle Scholar
- 12.P.E.J. Rivera-Díaz-Del-Castillo, J. Sietsma, S. Van Der Zwaag, A model for ferrite/pearlite band formation and prevention in steels. Metall. Mater. Trans. A 35A, 425–433 (2004)CrossRefGoogle Scholar
Copyright information
© ASM International 2019