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发明授权
CN101914732B 低牌号含钒含钛无取向电工钢的制备方法 失效 - 权利终止

低牌号含钒含钛无取向电工钢的制备方法
摘要：
本发明涉及冶金领域，提供了一种低牌号含钒含钛无取向电工钢，其化学成分的重量百分比为C≤0.005％、Si0.10～0.25％、Mn 0.15～0.35％、P≤0.025％、S≤0.008％、Als 0.25～0.35％、N≤0.007％、0＜Ti≤0.01％、0＜V≤0.01％、余量为Fe和不可避免的杂质，通过合理的成分设计，减少细小弥散的钒钛碳氮化物的析出。其制备方法，加热步骤中的温度为1130～1160℃；精轧的开轧温度为≥1000℃、终轧温度为850～890℃，卷取步骤中的温度为≥650℃，通过工艺设计，从物热力学、动力学上对钒钛析出物的形成和影响进一步进行抑制。通过抑制钒钛的不利影响，能生产满足电磁性能要求的含钒含钛无取向电工钢，扩大了无取向电工钢冶炼原料的来源范围，尤其是回收钢材的利用，能有效降低无取向电工钢的生产成本。
摘要（英）：

The invention relates to the field of metallurgy and provides a low-mark vanadium and titanium containing non-oriented electrical steel comprising the following chemical components in weight percentage: 0.005% of C or less, 0.10%-0.25% of Si, 0.15%-0.35% of Mn, 0.025% of P or less, 0.008% of S or less, 0.25%-0.35% of Als, 0.007% of N or less, 0.01% of Ti or less, 0.01% V or less and the balance of Fe and inevitable impurities. The precipitation of tiny dispersed vanadium, titanium and carbon nitrides is reduced by reasonable component design. In the manufacturing method, the temperature in a heating step is 1130-1160 DEG C; in the step of finish rolling, the start rolling temperature is not lower than 1000 DEG C, and the final rolling temperature is 850-890 DEG C; and in the step of reeling, the temperature is not lower than 650 DEG C, and the formation and the influence of vanadium and titanium precipitates are further inhibited on the physical thermodynamics and the dynamics through process design. The manufacturing method can be used for manufacturing the vanadium and titanium containing non-oriented electrical steel meeting the requirement of electromagnetic performance by inhibiting the adverse influence of the vanadium and titanium precipitates, can enlarge the source range of raw materials for smelting the non-oriented electrical steel, especially the utilization of recovered steel, and can effectively reduce the production cost of the non-oriented electrical steel.

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