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EXTRUSION METHOD UNDER HOLDING TEMPERATURE OF DIE END PART, EXTRUSION APPARATUS AND ALUMINUM EXTRUDED SHAPE
EXTRUSION METHOD UNDER HOLDING TEMPERATURE OF DIE END PART, EXTRUSION APPARATUS AND ALUMINUM EXTRUDED SHAPE
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机译：模具端部保持温度下的挤压方法，挤压装置和铝挤压形状
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摘要
PROBLEM TO BE SOLVED: To provide an extruded shape giving high strength of ≥400 N/mm2 with the aging treatment by realizing the high temp. state just after extruding to the solutionheat treatment. ;SOLUTION: After extruding an aluminum alloy into a prescribed shape so that the temp. of the extruded shape just after coming out from an extruding die becomes 540-560°C, this extruded shape is passed through a temp. holding vessel 13 disposed on the way to a cooling vessel 11 from the extruding die 3 and held to ≥520°C at the inlet of the cooling vessel 11 and quenched in the cooling vessel at ≥30°C/set cooling speed. The aluminum alloy containing 1.0-1.5% Si, 0.5-0.9% Cu, 0.2-0.6% Mn, 0.8-1.5% Mg, 0.15-0.9% Cr, 0.03-0.05% Ti, 0.0001-0.01% B and if necessary, 0.1-0.2% Zn, and ≤0.2% Fe and regulating ≤1.2% total content of Mn+-Cr, is used.;COPYRIGHT: (C)2000,JPO
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