Effect of heating rate on the development of annealing texture in nonoriented electrical steels
Effect of heating rate on the development of annealing texture in nonoriented electrical steels
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DOI：
10.2355/isijinternational.43.1611
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发表时间：
2003-01-01
影响因子：
1.8
通讯作者：
Cha, SY
中科院分区：
文献类型：
--
作者：
Park, JT;Szpunar, JA;Cha, SY
无取向电工钢的磁性能受晶粒尺寸和织构的影响。在最终退火过程中，升温速率、退火温度、退火时间和冷却速率是影响退火织构形成的主要因素。在这些参数中，加热速率通过回复和再结晶过程的变化来控制织构发展是更有效的。因此，它可以提供降低铁损和增加渗透率的手段。研究了不同初始晶粒尺寸的无取向电工钢在最终退火过程中加热速度对织构发展的影响，并讨论了织构变化的原因。粗晶和细晶试样的平均晶粒尺寸均随加热速率的增大而减小。在粗晶试样中，随着加热速率的增加，Goss织构显著增强，但{111}织构分量略有减弱。另一方面，在细晶粒试样中，随着加热速率的增加，{111}强度大大降低，但戈斯强度略有增加。加热速率到退火温度对织构形成的影响不同，这取决于冷轧前的初始晶粒尺寸。这些差异主要与在冷轧期间在具有不同尺寸的晶粒中形成的剪切带的数目的差异有关。
The magnetic properties of nonoriented electrical steels are influenced by grain size and texture. During the final annealing process, heating rate, annealing temperature and time, and cooling rate are the main factors which can influence the formation of annealing texture. Among these parameters, heating rate is more effective in controlling texture development through changes in the recovery and recrystallization processes. Therefore, it can provide the means to decrease core loss and increase permeability. In nonoriented electrical steels with different initial grain sizes, the effect of heating rate on texture development during final annealing is examined, and the reasons for texture changes are discussed. The average grain size decreases with the increase in heating rate both in the coarse-grained and in the fine-grained specimens. In the coarse-grained specimen, the Goss texture is significantly strengthened but the {111} texture component is slightly weakened as heating rate increases. On the other hand, in the fine-grained specimen, the {111} intensity is greatly decreased but the Goss intensity is slightly increased as the heating rate increases. The heating rate up to the annealing temperature affects texture formation differently depending on the initial grain size prior to cold rolling. These differences are mainly related to the difference in the number of shear bands formed during cold rolling in grains having different sizes.