Extrusion and heat treatment method for high speed railway locator aluminum material

The present invention discloses an extrusion and heat treatment method for a high speed railway locator aluminum material. The method comprises the following steps: preheating an aluminum rod to a temperature of 450-540 DEG C, preheating a mold to a temperature of 460-510 DEG C, preheating an ingot holding cylinder to a temperature of 400-450 DEG C, and then carrying out extrusion; carrying out online quenching on the profile after extrusion material discharging, wherein a temperature of the aluminum material after online quenching is 25-70 DEG C; naturally cooling to a temperature of 10-40 DEG C; standing for 100-160 h at a temperature of 10-40 DEG C; placing the obtained material into an aging furnace to carrying out artificial aging, wherein an aging temperature is 175-185 DEG C, and a thermal insulation time is 4-5 h; and cooling to a temperature of 10-40 DEG C after discharging out of the furnace. The high speed railway locator aluminum material produced according to the extrusion and heat treatment method has high mechanical properties, wherein tensile strength of the product is 3-31% higher than the European standard, yield strength of the product is 8-36% higher than the national standard, and elongation of the product is 28-100% higher than the national standard.