Effect of Heating Temperature and Die Insert Draft Angle on the Flowability of Hot Forged SCM435 Steel

Nofrijon Sofyan, Maulana Heruwiyono, Akhmad Herman Yuwono, Donanta Dhaneswara

Abstract

The problem of flowability in a closed forging process for heavy equipment industry is still widely found and this may affect the quality of the resulting product. To obtain the solution for this problem, in this work, the effect of heating temperature and die insert draft angle on the characteristic of hot forged SCM435 steel used for undercarriage track roller has been examined. The workpieces were heated at temperature variations of 1150 °C, 1200 °C, 1250 °C and were hot forged at die insert draft angles of 3°, 5°, and 7° to form undercarriage track roller products. The mechanical properties of the products were characterized through hardness and dimension examination, whereas the microstructure was characterized using an optical microscope. The results showed that increasing the heating temperature and die insert draft angle resulted in good flowability. The best result was obtained from the heating temperature of 1250 °C at the die insert draft angle of 7°, with diameter and height of 191.2 mm and 53.6 mm, respectively. This characteristic of the obtained hot-forged product agreed with that of the specified forging design for the undercarriage track roller

Keywords

Flowability, hot forging, track roller, undercarriage, underfilling

Full Text:

PDF

References

M. Kleiner, M. Geiger, and A. Klaus, “Manufacturing of Lightweight Components by Metal Forming,” CIRP Annals, vol. 52, no. 2, pp. 521–542, 2003, doi: https://doi.org/10.1016/S0007-8506(07)60202-9.

Serope Kalpakjian and Steven R. Schmid, Manufacturing engineering and technology. Boston: Addison Wesley Publishing, 1989.

A. H. Mane, “Design And Analysis Of Secondary Up setter Die To Correct Under filling Problem For Forged Front Axle Beam,” 2016.

Mahendra G. Rathi and Nilesh A. Jakhade, “An Overview of Forging Process with Their Defects,” International Journal of Scientific nd Research Publications, vol. 4, no. 6, 2014.

S.-W. Lee, J.-W. Jo, M.-S. Joun, and J.-M. Lee, “Effect of Friction conditions on Material Flow in FE Analysis of Al Piston Forging Process,” International Journal of Precision Engineering and Manufacturing, vol. 20, no. 10, pp. 1643–1652, 2019, doi: 10.1007/s12541-019-00189-8.

M. Hawryluk, D. Dobras, M. Kaszuba, P. Widomski, and J. Ziemba, “Influence of the different variants of the surface treatment on the durability of forging dies made of Unimax steel,” The International Journal of Advanced Manufacturing Technology, vol. 107, no. 11, pp. 4725–4739, 2020, doi: 10.1007/s00170-020-05357-z.

C. Ji, L. Wang, and M. Zhu, “Effect of Subcritical Annealing Temperature on Microstructure and Mechanical Properties of SCM435 Steel,” Journal of Iron and Steel Research, International, vol. 22, no. 11, pp. 1031–1036, 2015, doi: https://doi.org/10.1016/S1006-706X(15)30108-4.

C.-Y. Chen, F.-Y. Hung, T.-S. Lui, and L.-H. Chen, “Microstructures and Mechanical Properties of Austempering Cr–Mo (SCM 435) Alloy Steel,” MATERIALS TRANSACTIONS, vol. 54, no. 1, pp. 56–60, 2013, doi: 10.2320/matertrans.M2012317.

N. C. Cho, S. H. Lee, S. S. Hong, and J. S. Lee, “Experimental Verification of Preform Design for Axisymmetric Heavy Forging on a Model Hammer,” Journal of Materials Processing Technology, vol. 47, no. 1–2, pp. 103–110, 1994.

Joseph R. Davis and S. L. Semiatin, ASM Metals Handbook, Vol 14: Forming and Forging, 9th ed., vol. 14. Ohio: ASM International, 1989.

M. Irani and A. K. Taheri, “Effect of forging temperature on homogeneity of microstructure and hardness of precision forged steel spur gear,” Materials Chemistry and Physics, vol. 112, no. 3, pp. 1099–1105, 2008, doi: https://doi.org/10.1016/j.matchemphys.2008.07.044.

C. Zhang, li-yao Xie, G. Liu, lie Chen, Y. Liu, and J. Li, “Surface decarburization behavior and its adverse effects of air-cooled forging steel C70S6 for fracture splitting connecting rod,” Metals and Materials International, vol. 22, no. 5, pp. 836–841, 2016, doi: 10.1007/s12540-016-5657-x.

DOI: http://dx.doi.org/10.14203/metalurgi.v37i2.635
Copyright (c) 2022 Metalurgi
Creative Commons License
This work is licensed under a Creative Commons Attribution-NonCommercial-ShareAlike 4.0 International License.

Refbacks

  • There are currently no refbacks.


Bookmark and Share