Details
| Original language | English |
|---|---|
| Pages (from-to) | 2580-2587 |
| Number of pages | 8 |
| Journal | Journal of Materials Engineering and Performance |
| Volume | 22 |
| Issue number | 9 |
| Publication status | Published - 6 May 2013 |
Abstract
Quenching by spray cooling in the press line is a promising way to harden Al-Mg-Si alloys with regard to reducing profile distortion. For alloys such as EN AW-6082, high cooling rates are required. A device for spray cooling by means of water and compressed air was integrated into a 10 MN horizontal, hydraulic, short-stroke extrusion press. Various spray parameters were investigated. By using 32 water-air nozzles having a total water deposition rate of about 15 L/min and extruding with a profile velocity of 2.5 m/min, high mechanical properties were imparted to 30 mm diameter extruded rods. This arrangement ensures the extruded alloy is cooled to almost room temperature. Comparable properties can be achieved by water quenching, although the water consumption will be tenfold higher. The distribution of water deposition density on the profiles' surfaces was determined. It was shown that an adjustment of the water-air pressure ratio allows the final temperature of the profiles to be controlled over a wide range. Minimization of temperature gradients in the cross section of complex profiles allows profile distortions to be reduced.
Keywords
- Aluminum profiles, EN AW-6082, Extrusion, Spray cooling
ASJC Scopus subject areas
- Materials Science(all)
- General Materials Science
- Engineering(all)
- Mechanics of Materials
- Engineering(all)
- Mechanical Engineering
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In: Journal of Materials Engineering and Performance, Vol. 22, No. 9, 06.05.2013, p. 2580-2587.
Research output: Contribution to journal › Article › Research › peer review
}
TY - JOUR
T1 - Water-air spray cooling of extruded profiles
T2 - Process integrated heat treatment of the alloy EN AW-6082
AU - Nowak, M.
AU - Golovko, O.
AU - Nürnberger, F.
AU - Frolov, I.
AU - Schaper, M.
N1 - Funding information: The authors would like to thank the German Research Foundation (DFG) for their financial support of the work carried out within the scope of the joint research project FOR 922 ,,Entwicklung eines prozessbegleitenden Werkstoffmodells für eine durchgängige Prozesskette beim Leichtmetall-Strangpressen™™ TP 5 ,,Untersuchung und Modellierung einer integrierten Spray-kühlung beim Strangpressen mit simulationsbasierter Auslegung des Düsenfeldes™™.
PY - 2013/5/6
Y1 - 2013/5/6
N2 - Quenching by spray cooling in the press line is a promising way to harden Al-Mg-Si alloys with regard to reducing profile distortion. For alloys such as EN AW-6082, high cooling rates are required. A device for spray cooling by means of water and compressed air was integrated into a 10 MN horizontal, hydraulic, short-stroke extrusion press. Various spray parameters were investigated. By using 32 water-air nozzles having a total water deposition rate of about 15 L/min and extruding with a profile velocity of 2.5 m/min, high mechanical properties were imparted to 30 mm diameter extruded rods. This arrangement ensures the extruded alloy is cooled to almost room temperature. Comparable properties can be achieved by water quenching, although the water consumption will be tenfold higher. The distribution of water deposition density on the profiles' surfaces was determined. It was shown that an adjustment of the water-air pressure ratio allows the final temperature of the profiles to be controlled over a wide range. Minimization of temperature gradients in the cross section of complex profiles allows profile distortions to be reduced.
AB - Quenching by spray cooling in the press line is a promising way to harden Al-Mg-Si alloys with regard to reducing profile distortion. For alloys such as EN AW-6082, high cooling rates are required. A device for spray cooling by means of water and compressed air was integrated into a 10 MN horizontal, hydraulic, short-stroke extrusion press. Various spray parameters were investigated. By using 32 water-air nozzles having a total water deposition rate of about 15 L/min and extruding with a profile velocity of 2.5 m/min, high mechanical properties were imparted to 30 mm diameter extruded rods. This arrangement ensures the extruded alloy is cooled to almost room temperature. Comparable properties can be achieved by water quenching, although the water consumption will be tenfold higher. The distribution of water deposition density on the profiles' surfaces was determined. It was shown that an adjustment of the water-air pressure ratio allows the final temperature of the profiles to be controlled over a wide range. Minimization of temperature gradients in the cross section of complex profiles allows profile distortions to be reduced.
KW - Aluminum profiles
KW - EN AW-6082
KW - Extrusion
KW - Spray cooling
UR - http://www.scopus.com/inward/record.url?scp=84893683808&partnerID=8YFLogxK
U2 - 10.1007/s11665-013-0563-6
DO - 10.1007/s11665-013-0563-6
M3 - Article
AN - SCOPUS:84893683808
VL - 22
SP - 2580
EP - 2587
JO - Journal of Materials Engineering and Performance
JF - Journal of Materials Engineering and Performance
SN - 1059-9495
IS - 9
ER -