The steps are as follows: a. The cast aluminum alloy is a six-series aluminum alloy round ingot, and the mass percentage of elements in the aluminum alloy ingot used is 0.40%~0.55%, Fe is 0.15%~0.25%, and Cu is <0.05% , Mn is <0.05%, Mg is 0.40%~0.55%, Zn is <0.10%, Cr <0.02, single impurity <0.03%, total impurity <0.10%, the rest is Al; b. Round casting of six series aluminum alloy Ingot wagon, cutting head, cutting tail, low power, chemical composition, cutting wool, wool homogenization, heating temperature: 540-560°C, heat preservation for more than 9 hours, cooling method: air cooling and water cooling; after wool homogenization Cooling by air cooling to 200 °C and water cooling to room temperature; C. Heat the prepared aluminum alloy wool to 500-530 °C, quickly fill it into the extrusion cylinder, and proceed on a 36MN or 55MN extruder at an extrusion temperature of 500 0C , Extrusion speed 3 ± 0.5m/min, online quenching temperature 500 ± 5 °C, quenching speed 300-350 °C/min; d. Stretch the conductor of the 6101B T7 aluminum alloy thick wall pipe obtained in step c under tension, online The elongation rate of quenching is 1.0~2.0%, then aging, the aging temperature is 160-230°C, the metal is kept for 8-14 hours, and then the aging furnace is released;
The 6101B T7 aluminum alloy thick-walled tube conductor after the aging process is in accordance with the contract. According to the acceptance standards and the sampling location specified in the drawings, take physical and chemical samples, and after all physical and chemical tests are passed, perform surface inspection, dimensional inspection, and packaging after passing the inspection
