Buradasınız

Anasayfa » Content

SEMENTASYON ÇELİKLERİND E KÖRSERTLEŞTİRİLMİŞ VE SEMENTASYON YAPILMIŞ DURUMLARDA MEYDANA GELEN ARTIK GERİLMELERİN KARŞILAŞTIRILMASI

THE COMPARISON OF THE RESIDUAL STRESSES BETWEEN CARBURIZED AND ONLY QUENCHED STEELS

Journal Name:

  • Pamukkale Üniversitesi Mühendislik Bilimleri Dergisi

Publication Year:

  • 2001

Key Words:

Keywords (Original Language):

Author NameUniversity of AuthorFaculty of Author
Abstract (2. Language): 
In this study, the residual stresses developing in carburized and only quenched steel of SAE 8620 (21NiCrMo2) which is widely used as a carburized steel (shafts, gears etc.) was investigated. Carburizing programs was carried out in gas atmosphere for 45 minute at 940 °C. X-ray analysis was used to determine residual stress in the microstructures of the only quenched and carburized specimens. The results of x-ray analysis have shown that while the carburized specimens have a residual compressive stress at the surface -551N/mm2, the only quenched specimens have a residual compressive stress at the surface -125 N/mm2.
Bookmark/Search this post with
Abstract (Original Language): 
Bu çalışmada, sementasyon çeliklerinde körsertleştirilmiş ve sementasyon yapılmış durumlarda meydana gelen artık gerilmeler araştırılmıştır. Malzeme olarak, dişli çarklar ve küçük çaplı millerin yapımında yaygın olarak kullanılan SAE 8620 (21NiCrMo2) çeliği seçilmiştir. Körsertleştirme yapılmış numuneler ile gaz atmosferinde 940 °C'de 45 dakika karbonlama ve suverme işlemleri yapılan numunelerin yüzeyinde ve kabuk bölgesindeki artık gerilmeler karşılaştırılmıştır. Numunelerin artık gerilme eğrileri X-ray diffraction metoduyla tespit edilmiştir. Sementasyon işlemi yapılmış numunenin yüzeyindeki artık bası gerilmesi -551 N/mm2 iken, körsertleştirme yapılmış numunenin yüzeyindeki artık bası gerilmesi - 125 N/mm2 'dir.
FULL TEXT (PDF): 
PDF icon arastirmax-sementasyon-celiklerind-e-korsertlestirilmis-sementasyon-yapilmis-durumlarda-meydana-gelen-artik-gerilmelerin-karsilastirilmasi.pdf
  • 2
183
187
  • Turkish

REFERENCES

References: 

Almen, J. O. and Black, P. H. 1963. Residual Stresses and Fatigue in Metals, Mc Graw-Hill Book Company, Inc.
Bein, S., Calvez, C. L. and Lebrun, J. L. 1998.
Determination of Stress Gradients by X-ray Diffraction: Comparison of Different Methods and Applications, Zeitschriftfür Metallkunde 89, 289¬296.
Evanson, K., Krauss, G. and Medlin, D. 1995. "Bending Fatigue Behaviour of Vacuum Carburized
AISI 8620 Steel", Proceedings of the Second
International Conference on Carburizing and Nitriding with Atmospheres, 6-8 December 1995,
Cleveland, Ohio, ASM, 61-69.
Kim, H.
J
. and Kweon, Y. G. 1996. High Cycle Fatigue Behavior of Gas-Carburized Medium Carbon Cr-Mo, Metallurgical and Materials Transactions A, Vol. 27A, 2557-2564.
Krauss, G. 1989. Steels: Heat Treatment and Processing Principles, ASM International.
Krauss, G. 1991. Microstructures and Properties of Carburized Steels, ASM International, Metals Handbook, Volume 4: Heat Treating, 363-375.
Medlin, D., Krauss, G., Matlock, D. K., Burris, K., and Slane, M. 1995. Comparison of Single Gear Tooth and Cantilever Beam Bending Fatigue Testing of Carburized Steel, SAE Technical Paper Series, International Congress and Exposition, Detroit, Michigan, February 27-March 2.
Parrish, G. 1999. Carburizing: Microstructures and Properties, ASM International.
Preston, S. 1993. Fatigue Crack Initiation and Growth from a Gas Carburized Surface, Materials Transactions, JIM, 34 (1), 27-32.
Prevey, P. S. 1997. Problems with Non-destructive Surface X-ray Diffraction Residual Stress Measurement, Lambda Research Publications.
Silva, V. F., Canale, L. F., Spinelli, D., Bose, W. W.,
Crnkovic, O. R. 1999. Influence of Retained Austenite on Short Fatigue Crack Growth and Wear Resistance of Case Carburized Steel, Journal Materials Engineering and Performance, 8 (5),
543-548.
Zürn,
J.
, Razim, C. and Grosch, J. 1988. "The Effect of Residual Stress in Case Hardening", 6th International Congress on Heat Treatment of Materials, Chicago, 28-30 September, 279-283.

Thank you for copying data from http://www.arastirmax.com