Preparation method of high-quality micron-sized TA2 foil for aerospace engineering

The invention discloses a preparation method of a high-quality micron-sized TA2 foil for aerospace engineering. The method comprises the following steps: 1, heating a TA2 cast ingot, and then upsetting, drawing and forging; 2, rolling in a first rolling process of hot rolling; thirdly, after blanking and cutting, hot rolling is conducted, and second-rolling-process reversing rolling is conducted; 4, surface treatment; fifthly, single-piece rolling is conducted in the first rolling process of cold rolling; sixthly, oil removal, stripping, sanding, cleaning and vacuum heat treatment are conducted; seventhly, cold rolling is conducted in a second-rolling-process strip type; 8, removing oil, splitting and carrying out vacuum heat treatment; ninthly, strip type finished product rolling is conducted in the third rolling process of cold rolling; and 10, cleaning, longitudinally shearing and splitting, and carrying out heat treatment on a finished product to obtain the TA2 foil. The four-roller reversible type hot ro