The Role of Weld-Deposited Working Layer on the Performance of Hot Forging Dies

M. Amin, Liaqat Ali

Abstract


The performance of hot-forging dies, in which the die cavity is weld-deposited with a layer of modified H12 hot-work tool steel, has been studied, using a continuous monitoring of the die condition as well as macroscopic and microscopic examination. It was observed that the thickness of the hard upper ‘capping layer’ and that of an intermediate ‘buffer layer’ have a pronounced effect on the life and performance of forging die. For a given size and shape of the die cavity, there was an optimal thickness of capping layer that would give the best performance; thicker capping layers are likely to exhibit brittle cracking, while thinner layer have a tendency for early deformation and wear. For buffer layer, a certain minimum thickness is needed to provide sufficient backup support.

Full Text:

PDF

References


Die Life, 2011. www.dielife.com last accessed on 11-08-2011

Hammock D., 2007. Welded Repairs Extend Forging Die Life. J. ‘FORGE’ The International Journal of Forging Business & Technology, April 2007. pp. 17-19

Huskonen, W., 2004. Die Welding Can Improve Forging Profitability. Forging Magzine. Published June 6, 2004. pp. 1-4. Available at http://www.forgingmagazine.com/ zone/1185/news/71357/die_welding

Liu, X.J., Wang, H.C. and Li, D.W., 2007. Study on Design Techniques of A Long Life Hot Forging Die With Multi-Materials. Acta Metall. Sin. (Engl. Lett.) Vol. 20 No. 6 pp. 448- 456 .

Jeong, D., 2001. Effects of surface treatments and lubricants for warm forging, J Materials Processing Technology. Volume 113, Issue: 1- 3, pages: 544-550

Lee. H.C., Kim, B.M., Kim, K.H., 2003. Estimation of die service life in hot forging, considering lubricants and surface treatments. Proceedings of the Institution of Mechanical Engineers. Part B. Journal of engineering manufacture , Vol. 217, pp. 1011- 1022

ebookbrowse.com/chapter-11-surfacing-andshape-welding-pdf.

Cubberly, W.H., Masseria,V., Kirkpatrick, C.W., 1981. ASM Metals Handbook , Volume 4, ‘Heat Treating’ 9th edition, pp. 598-599.

Boyer, H.E., 1977. Atlas of Isothermal Transformation and Cooling Transformation Diagrams, 1977. American Society for Metals. pp. 293

MPD Welding, 2011. www.mpdwelding.com/floodwelding.htm

FMA The Fabricator, 2011. www.thefabricator.com/Consumables/Consum ables_Article.cfm?ID=1777






Copyright (c) 2016 M. Amin

Powered By KICS