Metallurgical concepts for optimized processing and properties of carburizing steel

doi:10.1007/s40436-016-0142-9

Abstract

Abstract:

Carburized steel grades are widely used in applications where high surface near hardness is required in combination with good core toughness as well as high strength and fatigue resistance. The process of carburizing lower to medium carbon containing steel can generally provide this combination of properties and has been practiced for several decades. Such steel is essential in the vehicle power-train, machines and power generation equipment. However, the increasing performance demands by such applications as well as economical considerations forced steel producers to develop better alloys and fabricators to design more efficient manufacturing processes. The present paper describes recent concepts for alloy design optimization of carburizing steel and demonstrates the forthcoming beneficial consequences with regard to manufacturing processes and final properties.

Key words: High temperature carburizing, Grain size control, Distortion control, Integrated manufacturing, Plasma nitriding, Micro pitting, Tooth root fatigue strength, Molybdenum steel, Niobium microalloying

Hardy Mohrbacher. Metallurgical concepts for optimized processing and properties of carburizing steel[J]. Advances in Manufacturing, 2016, 4(2): 105-114.

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References

1. Hock S, Mallener H, Sauter J et al (1994) Leistungsfähigkeit von Einsatzstählen und ihre Beeinflussung durch Anlassen. Härterei Technische Mitteilungen HTM 49(2):130-133
2. Dehner E, Weber F (2007, July) Experience with large, high speed load gears. Gear Technology, July, pp 42-52
3. Musial W, Butterfield S, McNiff B (2007) Improving wind turbine gearbox reliability. In:Proceeding of European wind energy annual conference, EWEA 2007, 7-10 May, Milan
4. Hau E (2006) Wind turbines, technologies, application, economics, 2nd edn. Springer, Berlin, pp 305-383
5. Löser K (2005) Innovative heat treating technologies in the automotive industry. In:Proceedings of steel in cars and trucks
2005. Verlag Stahleisen, Berlin, pp 237-244
6. Hock S, Kleff J, Kellermann I (2005) Temperature-the key to optimize cost and result in carburizing vehicle driveline parts. In:Proceedings of steel in cars and trucks 2005. Verlag Stahleisen, Berlin, pp 245-255
7. Hiller G (2014) Advantages of low pressure carburising and high pressure gas quenching technology in manufacturing. Int Heat Treat Surf Eng 8(1):35-41
8. Grange RA (1973) Estimating the hardenability of carbon steels. Metall Trans 4(10):2231-2244
9. Gay G (2009) Special steels for new energy sources. European conference on heat treatment, Strasbourg (France)
10. Huchtemann B, Schüler V (1993) Influencing the austenite grain size of special engineering steels. Thyssen Technische Berichte Heft 1(93):97
11. Kubota M, Ochi T (2007) Development of anti-coarsening steel for carburizing. Mater Sci Forum 539-543:4855
12. Leap MJ, Brown EL (2002) Effects of composition and processing on development of grain coarsening resistance in cold forged and carburized steel. Mater Sci Technol 18:945
13. Kimura T, Kurebayashi Y (2001) Niobium in microalloyed engineering steels, wire rods and case carburized products. In:Proceedings of the international symposium niobium TMS, p 801
14. Hippenstiel F (2007) Tailored solutions in microalloyed engineering steels for the power transmission industry. Mater Sci Forum 539-543:4131
15. Alogab KA, Matlock DK, Speer JG et al (2007) The influence of niobium microalloying on austenite grain coarsening behavior of Ti-modified SAE 8620 steel. ISIJ Int 47(2):307
16. Alogab KA, Matlock DK, Speer JG et al (2007) The effects of heating rate on austenite graingrowth in a Ti-modified SAE 8620 steel with controlled niobium additions. ISIJ Int 47(7):1034
17. Hippenstiel F, Mohrbacher H (2011) Optimization of molybdenum alloyed carburizing steels by Nb microalloying for large gear applications. In:Proceedings of materials science and technology (MS&T), pp 446-453
18. Mohrbacher H (2015) Improved gear performance by niobium microalloying of molybdenum-based carburizing steels. In:International conference on advances in metallurgy of long and forged products, pp 59-69
19. Wang CF, Wang MQ, Shi J et al (2007) Effect of microstructure refinement on the strength and toughness of low alloy martensitic steel. J Mater Sci Technol 23(5):659-664
20. Randak A, Eberbach R (1969) Einfluß der Austenitkorngrösse auf einige Eigenschaften des Stahles 16MnCr5. HTM HärtereiTechnische Mitteilungen 24(3):201
21. Bretl N, Schurer S, Tobie T et al (2014) Investigations on tooth root bending strength of case hardened gears in the range of high cycle fatigue. Thermal Processing for Gear Solutions, Fall/Winter, p 52
22. Höhn BR, Stahl K, Schudy J et al (2012) FZG rig-based testing of flank load-carrying capacity internal gears. Gear Technology, June/July, pp 60-69
23. McVittie D (1999) ISO 6336-5:strength and quality of materials. Gear Technology, January/February, pp 20-23
24. Klenke K, Kohlmann R, Reinhold P et al (2008) Grain growth behaviour of the case hardening steel 20NiMoCr6-5? Nb (VW 4521? Nb) for gear components during high temperature carburization. HTM J Heat Treat Mater 63(5):265-275
25. Kleff J, Hock S, Kellermann I et al (2005) High temperature carburization-influences on distortion behavior of heavy-duty transmission components. In:Proceedings of the 1st international conference on distortion engineering, Germany, pp 227-234
26. Heuer V, Löser K, Schmitt G et al (2011) Integration of case hardening into the manufacturing-line:one piece flow. American Gear Manufacturers Association Technical Paper, 11FTM24, October 2011, pp 1-12. ISBN:978-1-61481-023-0
27. Strobl V, Gebeshuber A, Müller T et al (2010) New advances and applications in pulsed-plasma nitriding of gear and power train systems. Elektrowärme International 3:221-226