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薄板坯工艺生产无取向电工钢具有磁感高、节约能源等多方面的优势,但薄板坯工艺生产无取向电工钢一般会出现边部分层缺陷,对边部分层缺陷的形成机理进行研究,有助于提高无取向电工钢边部质量,提高薄板坯工艺无取向电工钢的产品成材率。以某钢厂薄板坯工艺生产的TGW600为研究原料,从中间坯褶皱的形成原因、模拟晶内变形、高温强度与其他钢种的对比以及升温降温过程中的膨胀曲线等方面对边部分层原因进行了较为详细阐述。得出了TGW600晶粒在轧向和横向上的形变不均匀是产生边部分层的显微原因,在试验温度下没有明显的相变过程,一直处于铁素体状态,不存在塑性低谷等结论。并提出通过促进TGW600再结晶或轧制过程中对钢带进行形状控制的方法来减轻或消除边部分层的影响的建议。
Non-oriented electrical steel produced by thin slab technology has many advantages such as high magnetic induction and energy saving. However, non-oriented electrical steel produced by thin slab usually has edge layer defects and the formation mechanism of edge layer defects. Help to improve the quality of non-oriented electrical steel edge, improve the non-oriented electrical steel sheet product rate of thin slab. Based on the TGW600 produced by a steel mill’s thin slab process, the reasons for the formation of wrinkles on the edge of the slab were analyzed from the reason of the formation of the intermediate blank wrinkle, the simulation of the intragranular deformation, the contrast between the high temperature strength and other steel grades and the expansion curve during the temperature rising and cooling process Carried out a more detailed description. It is concluded that the deformation of the TGW600 grains in the rolling direction and the transverse direction is the microscopic reason for the generation of the edge layer. There is no obvious phase transformation process at the test temperature, and the ferrite state is always existed. . And proposes to mitigate or eliminate the effect of the boundary layer by promoting the shape control of the strip during recrystallization or rolling of the TGW600.