Hardening Distortions Related to Segregations in Crown Wheels
-
A. Olofsson
Abstract
The back-face tilt of press-hardened crown wheels is investigated for continuous and ingot cast material. Two different geometries are studied, one with a flat back-face and one with a step. For two ingots, the original material position is tracked and coupled to back-face tilt, cross section hardness and chemical segregation. The chemical gradients are shifted from top to bottom of the ingot and are strongly coupled to the back-face tilt.
Kurzfassung
Die Neigung der Rückseite von pressgehärteten Tellerrädern wird für Werkstücke aus Strang- und Blockgussmaterial untersucht. Dabei werden die Ergebnisse für zwei unterschiedliche Geometrien berücksichtigt, eine mit flacher sowie eine mit gestufter Rückseite. Für zwei Teile aus Blockgussmaterial wird die Originalposition des Materials verfolgt und mit der Neigung der Rückseite, der Härte im Querschnitt sowie der chemischen Seigerung ins Verhältnis gesetzt. Die chemischen Gradienten des Blockgusses werden von oben nach unten gewendet und stehen in engem Zusammenhang mit der Neigung der Rückseite.
References
1. Zoch, H.-W.: From Single Production Step to Entire Process Chain – the Global Approach of Distortion Engineering. Mat.-wiss. u. Werkstofftech.37 (2006) 1, pp. 6–10, 10.1002/mawe.200500958Zoch, H.-W.: From Single Production Step to Entire Process Chain – the Global Approach of Distortion Engineering. Mat.-wiss. u. Werkstofftech.37 (2006) 1, pp. 6–10, 10.1002/mawe.200500958Search in Google Scholar
2. Luetjens, J.; Surm, H.; Hunkel, M.; Gafsi, H.; Renken, V.; Schuettenberg, S.: Compensation of roundness deviations of bearing rings by heat treatment. Mat.-wiss. u. Werkstofftech.43 (2012) 1–2, pp. 48–55, 10.1002/mawe.201100887Luetjens, J.; Surm, H.; Hunkel, M.; Gafsi, H.; Renken, V.; Schuettenberg, S.: Compensation of roundness deviations of bearing rings by heat treatment. Mat.-wiss. u. Werkstofftech.43 (2012) 1–2, pp. 48–55, 10.1002/mawe.201100887Search in Google Scholar
3. Zoch, H.-W.: Distortion Engineering – Interim results after one decade research within the Collaborative Research Center. Mat.-wiss. u. Werkstofftech.43 (2012) 1–2, pp. 9–15, 10.1002/mawe.201100881Zoch, H.-W.: Distortion Engineering – Interim results after one decade research within the Collaborative Research Center. Mat.-wiss. u. Werkstofftech.43 (2012) 1–2, pp. 9–15, 10.1002/mawe.201100881Search in Google Scholar
4. Christinacce, M.: Distortion in Case Carburised Components – The steelmakers view. In: Heat Treating 1998, Proc. 18 th Conf., H. W.Walton (Ed.); ASM Int., Materials Park, OH/USA, pp. 5–11Christinacce, M.: Distortion in Case Carburised Components – The steelmakers view. In: Heat Treating 1998, Proc. 18 th Conf., H. W.Walton (Ed.); ASM Int., Materials Park, OH/USA, pp. 5–11Search in Google Scholar
5. Lesoult, G.: Macrosegregation in steel strands and ingots: Characterisation, formation and consequences. Mater. Sci. Eng. A413–414 (2005), pp. 19–29, 10.1016/j.msea.2005.08.203Lesoult, G.: Macrosegregation in steel strands and ingots: Characterisation, formation and consequences. Mater. Sci. Eng. A413–414 (2005), pp. 19–29, 10.1016/j.msea.2005.08.203Search in Google Scholar
6. Pickering, J. E.: Macrosegregation in steel Ingots: The Applicability of Modelling and Characterisation Techniques. ISIJ Intern.53 (2013) 6, pp. 935–949, 10.2355/isijinternational.53.935Pickering, J. E.: Macrosegregation in steel Ingots: The Applicability of Modelling and Characterisation Techniques. ISIJ Intern.53 (2013) 6, pp. 935–949, 10.2355/isijinternational.53.935Search in Google Scholar
7. Fredriksson, H.; Åkerlind, U.: Materials Processing during Casting. Wiley&Sons, Chichester, 2006, p. 20Fredriksson, H.; Åkerlind, U.: Materials Processing during Casting. Wiley&Sons, Chichester, 2006, p. 2010.1002/9780470017920Search in Google Scholar
8. Gunnarson, S.: Einfluß der Stranggußform auf den Verzug eines einsatzgehärteten Tellerrades aus Stahl. HTM Haerterei-Techn. Mitt.46 (1991) 4, pp. 216–220Gunnarson, S.: Einfluß der Stranggußform auf den Verzug eines einsatzgehärteten Tellerrades aus Stahl. HTM Haerterei-Techn. Mitt.46 (1991) 4, pp. 216–220Search in Google Scholar
9. Gunnarsson, S.; Cristinacce, M.; Lund, T.; Volkmuth, J.: “As-Cast” Shape Related to Heat Treatment Distortion in Circular-Shaped Engineering Components. J. Mater. Eng. Perform.4 (1995) 3, pp. 259–264, 10.1007/bf02649062Gunnarsson, S.; Cristinacce, M.; Lund, T.; Volkmuth, J.: “As-Cast” Shape Related to Heat Treatment Distortion in Circular-Shaped Engineering Components. J. Mater. Eng. Perform.4 (1995) 3, pp. 259–264, 10.1007/bf02649062Search in Google Scholar
© 2016, Carl Hanser Verlag, München
Articles in the same Issue
- Veranstaltungen/Events
- Veranstaltungen
- HTM-Praxis
- HTM-Praxis
- Kurzfassungen/Abstracts
- Kurzfassungen
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- Hardening Distortions Related to Segregations in Crown Wheels
- Consequences of Bend Straightening Processes on Residual Stresses and Strength of Quenched and Tempered Steels
- Distortion Control through Synchronized Vacuum Heat Treatment
- Distortion of Gears and Sliding Sleeves for Truck Gear Boxes – a Systematical Analysis of Different Heat Treatment Concepts
- Stress Relaxation by Transformation Plasticity under the Martensitic Transformation in Steels
Articles in the same Issue
- Veranstaltungen/Events
- Veranstaltungen
- HTM-Praxis
- HTM-Praxis
- Kurzfassungen/Abstracts
- Kurzfassungen
- Inhalt/Contents
- Inhalt
- Fachbeiträge/Technical Contributions
- Hardening Distortions Related to Segregations in Crown Wheels
- Consequences of Bend Straightening Processes on Residual Stresses and Strength of Quenched and Tempered Steels
- Distortion Control through Synchronized Vacuum Heat Treatment
- Distortion of Gears and Sliding Sleeves for Truck Gear Boxes – a Systematical Analysis of Different Heat Treatment Concepts
- Stress Relaxation by Transformation Plasticity under the Martensitic Transformation in Steels
