Non-oriented electrical steel containing vanadium and titanium and preparation method thereof
A technology of oriented electrical steel and rough rolling, which is applied in the field of metallurgy, can solve the problems of increasing production costs, unfavorable utilization of recycled steel, and small selection range of smelting raw materials, so as to achieve the effect of improving electromagnetic properties
Inactive Publication Date: 2012-06-27
PANGANG GROUP VANADIUM TITANIUM & RESOURCES +3
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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
Method used
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Embodiment
[0032] In a factory, an engineering test was carried out according to the composition design and process design of the present invention. The production grade is 50PW600 vanadium-containing titanium-containing non-oriented electrical steel, and other processes except the stated process parameters are implemented according to existing requirements.
[0033] The equipment includes a 120-ton LD converter, a hot continuous rolling unit including five-pass rough rolling and six-stand finish rolling, and a galvanizing / continuous annealing dual-purpose unit. The specific production process is as follows: steel billet, heating, rough rolling, finishing rolling, coiling, cold rolling, annealing. During the production process, the descaling water of other passes except the second and fourth passes is turned on in the rough rolling step, and a set of dephosphorization water is set between the rough rolling and the finishing rolling. The specific chemical composition is shown in Table 1, ...
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Abstract
The invention relates to the field of metallurgy and provides a non-oriented electrical steel containing vanadium and titanium, which comprises the following chemical components in percentage by weight: 0.001-0.005% of C, 0.85-1.00% of Si, 0.15-0.35% of Mn, less than or equal to 0.025% of P, less than or equal to 0.008% of S, 0.30-0.40% of Als, less than or equal to 0.004% of N, greater than 0 and less than or equal to 0.01% of Ti, greater than 0 and less than or equal to 0.01% of V, the balance Fe and unavoidable impurities. Precipitation of fine dispersive vanadium and titanium carbonitrides are reduced by reasonable component design. In the preparation method, the temperature in a heating step is 1140-1170 DEG C, the initial rolling temperature of finish rolling is greater than or equal to 1030 DEG C, the finishing temperature is 890-930 DEG C, and the temperature in the coiling step is greater than or equal to 650 DEG C. The formation and effect of the vanadium and titanium precipitate are further inhibited thermodynamically and dynamically by process design. By inhibiting the adverse effects of vanadium and titanium, the non-oriented electrical steel containing vanadium and titanium meeting the requirement of electromagnetic performance can be produced, thereby enlarging the source range of smelting raw material of the non-oriented electrical steel, especially the utilization of recycled steel products, and effectively reducing 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 non-oriented electrical steel containing vanadium and titanium 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, and the coercive force...
Claims
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IPC IPC(8): C22C38/14C21D8/12
CPCY02P10/20
Inventor 李军李正荣曾建华李俊洪陈永李卫平王平利梁英罗击周一林汤佩林刘富贵
Owner PANGANG GROUP VANADIUM TITANIUM & RESOURCES