论文部分内容阅读
室温下磷可以在铁中溶解1.2％,并形成无任何析出物的置换式固溶体。磷改变了铁原子间的结合力、激活能,因此对再结晶过程和晶粒长大有影响。含磷量不同,钢在950℃退火2小时后具有不同的晶粒。钢中含磷量从0.03％提高到0.70％时可使1毫米~2上的晶粒数(放大100倍)减少10倍(图1,曲线N),这超过了同样建量的类似影响大约4～5倍。预先经50％压下量冷轧的试样在620-840℃的铅浴炉中退火井保温1分钟。金相分析证明,随着含磷量提高,试样中的真实再结晶比含少量磷的试样在更高的温度下进行。图1表示在磷的影响下,再结晶处理的开始和结束温度的变化。由图中看出,钢
Phosphorus dissolves 1.2% in iron at room temperature and forms a displacement solid solution without any precipitate. Phosphorus changes the binding force between iron atoms and activates energy, thus influencing the recrystallization process and grain growth. Different phosphorus content, steel annealed at 950 ℃ for 2 hours with different grains. Increasing the phosphorus content in the steel from 0.03% to 0.70% reduces the number of grains (magnified 100 times) in the range of 1 mm to 2 by a factor of 10 (Figure 1, curve N), which exceeds the similar effect of the same build-up 4 ~ 5 times. The sample, which had been cold rolled in advance by 50% reduction, was annealed in a lead bath furnace at 620-840 ° C for 1 minute. Metallographic analysis demonstrated that as the phosphorus content increased, the true recrystallization in the sample proceeded at a higher temperature than the sample containing a small amount of phosphorus. Figure 1 shows the change of the start and end temperatures of the recrystallization treatment under the influence of phosphorus. Seen from the figure, steel