CSP冷轧薄板罩式退火过程粘结的分析和工艺改进

Analysis on Sticking Defect of CSP Cold Rolled Steel Sheet Annealing in Bell Type Annealing Furnace

分析了包钢CSP工艺SPCC钢(≤0.10%C)0.25～3.00 mm冷轧薄板全氢罩式退火过程粘结的机理和主要影响因素。通过合理选择卷取单位张力,避免张力波动,提高卷形和板形质量;退火温度680℃,400～680℃采用慢速升温,冷却工艺为炉冷至560℃,空冷至380℃,水冷及采用提高H_2的纯度等措施使粘结率显著降低。

The mechanism and major effect factors for sticking of CSP 0.25 - 3.00 mm cold rolled sheet of steel SPCC （ ≤0. 10% C） during bell type hydrogen annealing process at Baotou Steel have been analyzed. The sticking defect rate of sheet obviously decreased by technology measures such as selecting suitable coiling unit tension to avoid tension fluctuation; increasing coil and profile shape quality; annealing at 680 ℃ with low heating rate at 400 - 680 ℃, and cooling with process - furnace cooling to 560 ℃, air cooling to 380 ℃ then water cooling; and increasing H2 purity.