Production method for 6-mm limit specification sheet

The invention discloses a production method for a 6-mm limit specification sheet. The production method comprises the following steps of cogging a blank; charging the finished cogged blank in a furnace to be rolled; turning down cooling water from a tapping roller bed to a rotary roller bed at a finish rolling outlet before rolling; turning off cooling water of a finish rolling supporting roller;designing a rolling mode as axial rolling and single-rack rolling; carrying out finish rolling to load for 8 passes, wherein the finish rolling temperature is 850-875 DEG C; and straightening the blank by a pre-heating straightener after rolling, wherein the blank is not allowed to be offline after rolling but is directly finished and judged to put into storage. By carrying out production according to the scheme, the rolled big plate has bilateral waves slightly, and the plate form after heat straightening is good, and is then cold-straightened. The percent of pass of the plate form is increased from original 60% to 9