冷轧变形量和热处理工艺对电磁纯铁矫顽力的影响

Effect of Cold-Rolling Deformation and Heat Treatment Process on Coercive Force of Magnetic Pure Iron

试验用电磁纯铁0.5～2.5 mm冷轧板由3.5～4.5 mm热连轧电磁纯铁板(%:0.005C、0.50Al)经350 mm四辊可逆式精轧机冷轧而成。结果表明,电磁纯铁板获得较小矫顽力的最佳退火温度为850～900℃,退火升降温速度对矫顽力影响较小。当冷轧变形量由28.6%增加至88.9%时,900℃退火后纯铁板的矫顽力由29.8A/m增加到73.5 A/m,获得较小矫顽力的最佳冷轧变形量为≤45%。

The 0. 5 - 2. 5 mm cold rolled sheet of test magnetic pure iron is rolled by 350 mm four high reversing finishing mill from 3.5 -4. 5 mm hot continuous rolled plate of magnetic pure iron （ % ： 0. 005C, 0. 50Al）. Results show that the optimum annealing temperature for the magnetic pure iron sheet to get smaller coercive force is 850 - 900 ℃, the heating and cooling speed of annealing has no obvious influence on the coercive force; with increasing cold-rolling deformation from 28.6% to 88.9% , the coercive force of pure iron sheet annealed at 900 ℃ increases from 29. 8 A/m to 73.5 A/m, therefore the optimum cold rolling deformation to get smaller coercive force is ≤45%.