ISSN:
1662-9752
Source:
Scientific.Net: Materials Science & Technology / Trans Tech Publications Archiv 1984-2008
Topics:
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
Notes:
For quenching of age hardenable aluminum alloys today predominantly aqueousquenching media are used, which can lead due to the Leidenfrost phenomenon to a non-uniformcooling of the parts and thus to distortion. In relation to the conventional quenching procedures inaqueous media, gas quenching exhibits a number of technological, ecological, and economicaladvantages. The quenching intensity can be adjusted by the variable parameters gas pressure, gasvelocity as well as the kind of gas and thus can be adapted to the requirements of the component.By the higher uniformity and the better reproducibility, gas quenching offers a high potential toreduce distortion. Cost savings would be possible, because of reduced distortion and therefore lessreworking. High-pressure gas quenching with nitrogen or helium, as well as air quenching atambient pressure in a gas nozzle field was applied to the spray formed aluminum alloyAl-17Si-4Fe-3Cu-0.5Mg-0.4Zr (DISPAL S232). Hardness and tensile tests have been carried out todetermine the mechanical properties after gas quenching and aging compared to water quenching.The distortion behavior of a forged aluminum component of the spray formed alloy was examinedafter gas quenching and after water quenching. Gas quenching showed remarkable advantagesregarding distortion
Type of Medium:
Electronic Resource
URL:
http://www.tib-hannover.de/fulltexts/2011/0528/02/13/transtech_doi~10.4028%252Fwww.scientific.net%252FMSF.519-521.383.pdf
