Numerical Simulation of Quenchant Flow Characteristics in Large Quench Tank

Abstract:

The computational fluid dynamics (CFD) technique is employed to predict the flow of quenchant in a large quench tank. The characteristics of flow field in the existing quench tank are investigated, and the major deficiency occurred in the tank structure design is analyzed. Two different schemes for improving the tank structure design are brought forward, and further numerical simulations are carried out. Results show that the non-uniform flow field is generated throughout the quenching zone in the existing large quench tank. There is clear difference in flow rate in the regions near the inner surface of workpiece and the outer, which may cause the workpiece distortion and even cracking. Reduction in ring pipe intermediate diameter can not obviously enhance the uniformity of flow field in the quench tank. By adding an inner core in the center zone of the tank, the flow rate in the region near the inner surface of workpiece can be increased effectively, and the flow rate difference found in the quenching zone reduced significantly, which are beneficial to guarantee the quenching quality of workpiece.

• Periodical: Applied Mechanics and Materials (Volumes 271-272)
• Pages: 1372-1376
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.271-272.1372
• Online since: December 2012
• Authors: Hui Sun
• Keywords: Flow Field, Large Quench Tank, Numerical Simulation

References

[1] Su X W, Yan R P, Gu M, et al. Computer simulation of quenchant flow field in quenching tank with and without workpiece, Heat Treatment. 23 (2008) 50-53.

[2] Su X W, Gu M, Li B K, et al. Numerical simulation of quenchant flow field in quenching tank, Hot Working Technology. 37 (2008) 96-98.

[3] Mackenzie D S. CFD modeling of quench tank agitation, Proceedings of the 10th Congress of the IFHT, Brighton, UK, (1996), 655-669.

[4] Bogh N. Quench tank agitation design for heavy gauge loads, The 17th heat treating society conference and exposition and the 1st international induction heat treating symposium, Indianpolis, Indiana, (1998) 225-228.

[5] Chen N L, Liao B, Pan J S, et al. Improvement of the flow rate distribution in quench tank by measurement and computer simulation, Materials Letters. 60 (2006) 1659-1664.

DOI: 10.1016/j.matlet.2005.11.102

[6] Chen N L, Li Q, Liao B, et al. Flow rate measurement and computational fluid dynamic of quench tank, Transactions of Materials and Heat Treatment. 23 (2002) 33-36.

[7] Sun H, Li R B, Chen Z Y. Quench tank used for large cylindrical workpiece, China Patent 201210037511.1. (2012)