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采用TEM和光学显微镜对CSP工艺生产的冷轧基料和变形81.6%的冷硬板及模拟罩式退火工艺的退火板进行了组织分析。结果表明,在CSP工艺热轧、冷轧及退火各生产工序中都有纳米级第二相析出物的存在,Fe3C有聚集长大的趋势,MnS和AlN弥散分布在晶界和晶内,MnS尺寸为40～100 nm,在610℃时观察到50 nm左右AlN大量析出。第二相对退火过程中再结晶组织产生了重要影响,MnS及Fe3C对冷轧板组织的影响较AlN弱。随着退火过程的进行,晶粒长大,扁形晶粒增多。
The cold rolling base material produced by CSP process and the annealed sheet of 81.6% cold plate and simulated annealing annealing process were analyzed by TEM and optical microscope. The results show that in the hot-rolled, cold-rolled and annealed CSP processes, nanocrystalline second phase precipitates exist. Fe3C has the tendency to aggregate and grow. MnS and AlN disperse in the grain boundaries and grain boundaries. MnS The size of 40 ~ 100 nm, at 610 ℃ observed around 50 nm AlN large precipitation. The second relative annealing process recrystallization has an important impact on the organization, MnS and Fe3C on the cold-rolled plate organization than the weak AlN. With the annealing process, grain growth, flattened grains increased.