Vanadium and titanium containing cold rolling non-oriented electrical steel and preparation method thereof

Abstract

The invention relates to the field of metallurgy, providing a vanadium and titanium containing cold rolling non-oriented electrical steel which comprises the following chemical components in percentage by weight: 0.001-0.005 wt% of C, 0.50-0.65 wt% of Si, 0.15-0.35 wt% of Mn, less than or equal to 0.025% of P, less than or equal to 0.008 wt% of S, 0.40-0.50 wt% of Als, less than or equal to 0.007 wt% of N, more than 0 and less than or equal to 0.01 wt% of Ti, more than 0 and less than or equal to 0.01% of V and the balance of FE and inevitable impurity. By reasonable ingredient design, the tiny diffused vanadium, titanium and carbon nitride precipitation can be reduced. The preparation method is as follows: temperature in the heating process is 1140-1170 DEG C; the rolling temperature of finish rolling is more than or equal to 1030 DEG C, and final rolling temperature is 890-930 DEG C; and the temperature in the reeling step is more than or equal to 650 DEG C. By process design, the formation and influence on the vanadium and titanium educt can be further inhibited from physical thermodynamics and dynamics. The inhibition of adverse effect of vanadium and titanium can produce vanadium and titanium containing non-oriented electrical steel which satisfies the electromagnetism performance requirement, thus enlarging the resource range of non-oriented electrical steel smelting raw material; and especially the utilization of recycled steel can effectively lower the production cost of the non-oriented electrical steel.

Description

technical field [0001] The invention relates to the field of metallurgy, in particular to a vanadium-containing and titanium-containing cold-rolled non-oriented electrical steel and a preparation method thereof. Background technique [0002] Vanadium and titanium are commonly used alloying elements in steel. The vanadium and titanium carbonitrides formed by adding an appropriate amount of vanadium and titanium to steel can refine grains and strengthen precipitation; at the same time, vanadium and titanium can also improve the grain size in the reheating stage Coarsening temperature. Therefore, vanadium-titanium microalloy steel has good strength, toughness, corrosion resistance, wear resistance and impact load capacity, and is widely used as structural steel in construction, engineering machinery, bridge automobiles, railways and other fields. [0003] For non-oriented electrical steel, when the average grain size is large, the area occupied by the grain boundary decreases,...

AI Technical Summary

Problems solved by technology

In order to reduce the difficulty of smelting, it is necessary to strictly control the source of smelting raw materials for non-oriented electrical steel, so the selection range of smelting raw materials is small, which increases production costs and is not conducive to the utilization of recycled steel

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