Browse Publications Technical Papers 2019-26-0165
2019-01-19

Manufacturing of Transmission Quill Gear by Sinter Hardening Process 2019-26-0165

Transmission quill gears are hot forged steel parts often used in constant mesh manual transmissions. The quill gear, which helps to transmit the power from input drive shaft to output shaft through driving gears. It's having external teeth which is positively engaged with driving gear and sleeve. During gear selection sleeve take load from input shaft and transmit to driven gear. Quill gear directly engaged with driving gears on outer surface and bearing in inner surface which needs to have high strength and durability. These properties can be improved by carburization heat treatment in existing design such processes can lead to increased costs. We have developed quill gear through powder metallurgical process and then cooled rapidly in the furnace to get high strength and wear properties. Material composition are optimized to suit for sinter hardening process conditions. Thus, we have succeeded in the development of quill gears via sinter hardening, thus eliminating the forging and second hardening process. This paper will have detailed discussion on material chemical composition, sinter hardening process, mechanical and metallurgical properties comparison and validation results. Keywords: Quill gear, sinter hardening process, References: 1.Materials Standards for P/M Structural Parts 2000 Edition, MPIF Standard 35, Metal Powder Industries Federation, Princeton NJ. 08540, published 2000 2.W. Brian James: "what is sinter hardening" International Conference on Powder Metallurgy & Particulate Materials May 31 - June 4, 1998 Las Vegas, Nevada USA.

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