IF钢应变硬化指数n值的优化研究

Study on Optimization of Strain Hardening Exponent n of IF Steel

分析了IF钢应变硬化指数n值的影响因素,探讨了影响IF钢n值的主要工艺因素。对应变硬化指数进行了优化。结果表明,降低碳含量(0.0020%→0.0013%)和钛含量(0.07%→0.06%)、提高轧后冷却速度、提高退火温度(820→840℃)和降低平整伸长率(0.8%→0.6%),可以明显提高IF钢的n值。

Influence factors of strain hardening exponent n value of IF steel were analyzed. The main technological factors influencing the n value of IF steel were discussed. The strain hardening exponent was optimized. The results show that reducing carbon content （0.0020%→0.0013 %） and titanium content （0.07%→0.06%）, improving the cooling rate after rolling, increasing annealing temperature （820→840℃） and reducing flattening elongation （0.8%→0.6%） can significantly improve the n value of IF steel