Technological Surface Layer Selection for Small Module Pitches of Gear Wheels Working under Cyclic Contact Loads


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Selection of proper technological surface layer well resistant to cyclic external loads superposed onto residual stresses is presented in this paper, with a gear wheel taken as an example. The computer simulations of external loads were carried out by means of the FEM method (Finite Element Method) with the use of the ANSYS package. Residual stresses were measured by means of the Waisman-Philips and modified X-ray sin2Ψ method. The results of the stress superposition were verified experimental by with use of a circulating power stand. The applied low pressure nitiriding method NITROVAC demonstrated a high ability to increase the durability and reliability of the discussed toothed wheel in comparison with the convencional treatment applied so far.



Edited by:

B.G. Wendler, P. Kula and J. Jedlinski




Z. Gawroński and J. Sawicki, "Technological Surface Layer Selection for Small Module Pitches of Gear Wheels Working under Cyclic Contact Loads ", Materials Science Forum, Vol. 513, pp. 69-74, 2006

Online since:

May 2006




[1] J. Sawicki: Optimization of the Technological Surface Layer Under Conditions of Cyclic Contac Loads (PhD thesis, Ed. by Printing Office of the TUL, Lodz, 2003, in Polish).

[2] Z. Gawroński, P. Kula, R. Pietrasik, J. Sawicki: Modern Technologies of Surface Layer Hardening, Decreasing the Contact Fatigue of Machine Parts. Tribologia Vol. 36 (2001), p.19.

[3] Z. Gawroński: Aspects of Tribological Surface Design with Particular Reference to the Effects of Low Pressure Nitriding and Residual Stresses in Rolling Contacts. Surface and Coatings Technology Vol. 141 (2001) p.62.


[4] P. Kula, Z. Gawroński, D. Siniarski, J. Sawicki: Designing of Structure and Properties of Composite Coatings for Special Applications. (Proc. of. 12th Summer School Modern Plasma Surface Technology, in Kołobrzeg, 2000, p.185).

[5] Z. Haś: Patent No. PL 178378 (in Polish).

[6] J. Waisman, A. Phillips: Proc. of the Royal Soc. of London Vol. XI No. 2 (1952) p.102.

[7] ISO Standard No. 6336: 1-5. Calculation of load capacity of spur and helical gears.

[8] Z. Haś, P. Kula: The New Polish Nitriding and Nitriding Like Processes in the Modern Technology (Proceeding of the Second Inter. Conf. on Carburizing and Nitriding with Atmosphers, Clevelend-Ohio, USA, 1995, p.227.