Based on the galvannealed phase transformation theory,the phase and powder level of a galvannealed coating produced on one of the galvanizing lines at Baosteel*s cold-rolling plant were analyzed under different condit...Based on the galvannealed phase transformation theory,the phase and powder level of a galvannealed coating produced on one of the galvanizing lines at Baosteel*s cold-rolling plant were analyzed under different conditions before and after a technical innovation was introduced.After the introduction of the technical innovation,heating and cooling abilities of the galvannealing furnace were strengthened,galvanizing speed increased from 75 to 100 m/min,and the galvannealing target temperature could be reached more quickly.As such,the 8,phase was more uniform and dense,and the coating's anti-powdering ability was increased.Although the galvanizing time was slightly shortened,this had no negative effect on the anti-powdering ability of the galvannealed coating.展开更多
文摘Based on the galvannealed phase transformation theory,the phase and powder level of a galvannealed coating produced on one of the galvanizing lines at Baosteel*s cold-rolling plant were analyzed under different conditions before and after a technical innovation was introduced.After the introduction of the technical innovation,heating and cooling abilities of the galvannealing furnace were strengthened,galvanizing speed increased from 75 to 100 m/min,and the galvannealing target temperature could be reached more quickly.As such,the 8,phase was more uniform and dense,and the coating's anti-powdering ability was increased.Although the galvanizing time was slightly shortened,this had no negative effect on the anti-powdering ability of the galvannealed coating.