| 摘要 |
FIELD: metallurgy. ^ SUBSTANCE: invention relates to thick-walled plate made of aluminium alloy with high tensile and low sensitivity to quenching and also method of production such thick-walled plates and can be used in motor industry. Plate made of aluminium alloy is received by means of continuous casting of alloy with receiving of blank of thickness more than 300 mm, blank heating till the temperature 470-490C, blank homogenising annealing at that temperature, hot rolling of homogenised blank with receiving of plate of thickness less than 300 mm or cooling down till the intermediate temperature, which is 400-410C, aftercooling from intermediate temperature 400-410C till the temperature less than 100C, plate cooling till the room temperature and plate artificial aging. Alluminum alloy allows following content, wt %: Zn from 4.6 till 5.2, Mg from 2.6 till 3.0, Cu from 0.1 till 0.2, Zr from 0.05 till 0.2, Mn maximum is 0.05, Cr maximum is 0.05, Fe maximum is 0.05, Si maximum is 0.15, Ti maximum is 0.10, aluminium is the rest and admixtures conditioned by technological process characteristics. ^ EFFECT: receiving of thick-walled plate, allowing high tensile throughout, with low sensitivity to quenching. ^ 34 cl, 5 dwg, 1 ex |
