RUMYANCEV Michael G.I. Nosov Magnitogorsk State Technical University

Spoluautoři NASONOV Vadim

The developing of working patterns of rolling is very important to create and update a technology of producing steel strips. In addition, it used in estimation a possibility of equipment for producing new gages of steel strip. We used the invariable method to designing the pattern of rolling, which based in automatical computer-assistant engineering. With help this method we have calculated rational total strain amount and rolling speed with maximum productivity for different kinds of steel grades on PLTCM 2000 (picking line tandem cold mill). For examples, to produce on PLTCM 2000 low carbon and ultralow carbon steels (DC01-DC04, HC180Y and analogue) with total strain amount about 85 % rational rolling speed calculated about 16,5-17 m/s. According to equipment’s specification PLTCM, maximum rolling speed not more than 25 m/s. The limitation was a picking speed. To produce HSLA steels (HC260LA, HC300LA, HC340LA and analogue) with total strain amount about 80 % rational cold rolling speed calculated about 16-18,5 m/s. According to accounts Cold Roll, during the cold rolling on PLTCM 2000 these grades with total strain amount 75-85 % the limitation was a high-temperature stability of rolling emulsion. To produce HSLA steels with total strain less 75 % the limitation was a picking speed. To produce HSLA steels (HC420LA, HX420LAD and analogue) rational total strain amount was about 67-70 %, cold rolling speed – 13-15 m/s. To produced high strength steels (HTC980X, HTD1200M and analogue) rational strain amount was about 58-63 %, cold rolling speed – 7,5-10 m/s. In last two examples, limitations were a pickling speed.