MICRO-MULTIPORT TUBING AND METHOD FOR MAKING SAID TUBING

摘要

This invention is a process for making improved micro-multiport tubing for use in heat exchangers. A multivoid heat exchanger tube is extruded from aluminum alloy billet. The alloy is a composition of cooperative elements which act with the aluminum to prevent recrystallization and grain growth which result in the necessary strength and duality of characteristics in the tubes. The composition of the alloy that is added to aluminum is some or all of the following: silicon, iron, copper, magnesium, manganese, zinc and titanium. The cold work during processing of the heat exchanger is limited to further retain the small grains.