Comparative Analysis of Forging Rolling and Cross-Wedge Rolling of Forgings from Titanium Alloy Ti6Al4V

Abstract:

Theoretical-experimental results of forging rolling and cross-wedge rolling of stepped shafts forgings from titanium alloy Ti6Al4V are presented in this paper. Theoretical assumptions were based on the results of numerical simulations conducted by means of finite element method with the application of software Simufact Forming. During numerical simulations optimal parameters of the rolling processes were determined in view to possibility of obtaining forgings of assumed quality and stable process course. Experimental verification was conducted in universal forging rolling mill of own design, which allows for realization of such processes as splitting without waste, forging rolling and cross as well as cross-wedge rolling processes. During conducted research influence of the way of rolling on the obtained parts quality and the process force parameters were determined. Complex analysis of the chosen rolling parameters impact on the rolling process course and quality of finished products was made. Conducted research showed that it is possible to roll axi-symmetrical forgings of stepped shafts both in transverse and longitudinal arrangement. However, forgings rolled crosswise are characterized by larger precision than in comparison with semi-finished products in longitudinal arrangement.

• Periodical: Key Engineering Materials (Volume 687)
• Pages: 141-148
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.687.141
• Online since: April 2016
• Authors: Arkadiusz Tofil, Janusz Tomczak*, Tomasz Bulzak
• Keywords: Cross-Wedge Rolling, Experiment, Finite Element Method (FEM), Forging Rolling, Titanium Alloys

References

[1] G. Winiarski, A. Gontarz, Z. Pater, A new process for the forming of a triangular flange in hollow shafts from Ti6Al4V alloy. Arch. Civ. Mech. Eng. 15 (2015) 911-916.

DOI: 10.1016/j.acme.2015.01.001

[2] R. Melechow, K. Tubielewicz, W. Błaszczuk, Titanium and its alloys. Czestochowa University of Technology, 2004 (in Polish).

[3] Titanium and Titanium Alloys. Welding handbook. Vol. 4, Materials and Applications, part 2. American welding Society, Miami (1998).

[4] M.J. Donachie, Titanium, A Technical Guide. Second edition. ASM international, (2000).

[5] A. Bylica, J. Sieniawski, Titanium and its alloys, Polish Scientific Publishers, Warsaw 1985 (in Polish).

[6] A. Gontarz, Z. Pater, K. Drozdowski, Forging on Hammer of Rim Forging From Titanium Alloy Ti6Al4V. Arch. Metall. Mater. 57 (2012), 1239 – 1246.

DOI: 10.2478/v10172-012-0138-9

[7] Z. Pater, Cross-wedge rolling, Lublin University of Technology, 2009 (in Polish).

[8] Z. Pater, A. Tofil, Experimental and theoretical analysis of the cross-wedge rolling process in cold forming conditions, Arch. Metall. Mater. 52 (2007) 289 - 297.

[9] J. Lisowski, Roll forging, Publishers in Science and Technology, Warsaw 1974 (in Polish).

[10] Simufact. material 2012. 0. 0. 14871, simufact engineering gmbh, Hamburg (2012).

[11] A. Tofil, Z. Pater, J. Tomczak. A two-roll mill stand, particularly for cross and longitudinal rolling and for bar cropping. Polish patent no. PL 215512, (2013).

[12] A. Tofil., J. Tomczak, Z. Pater. A reduction gear with variably rotating output shafts enabling torque measurement. Polish patent no. PL 219484, (2013).

[13] A. Tofil, J. Tomczak, T. Bulzak, Numerical and Experimental Study on Producing Aluminum Alloy 6061 Shafts by Cross Wedge Rolling Using a Universal Rolling. Mill. Arch. Metall. Mater. 60 (2015) 801 - 807.

DOI: 10.1515/amm-2015-0210