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利用V-N微合金化技术,在16Mn钢基础上进行铁塔用角钢的合金设计,并结合角钢的孔型轧制要求,考察了V/N合金设计以及板坯加热温度、轧制工艺参数对角钢组织性能的影响。结果表明,随着钢中V/N含量的增加,钢中弥散析出的第二相粒子数量显著增加,屈服强度显著提高,其中0.01%的钒含量对屈服强度贡献约为23 MPa。V-N微合金化角钢坯料再加热过程中V(C,N)粒子的溶解温度低于1 150℃,控制低的坯料加热温度有利于提高角钢的低温冲击韧性。终轧温度对低钒钢的屈服强度和韧性存在显著影响,但对高钒钢的组织性能影响不大。采用V-N微合金化设计后,角钢的综合性能得到显著提高,且力学性能对轧制工艺参数变化不敏感,因此,V-N微合金化技术适用于角钢的实际生产应用。
Using VN micro-alloying technology, based on the 16Mn steel tower angle steel alloy design, combined with the angle of the hole rolling requirements investigated V / N alloy design and slab heating temperature, rolling process parameters of angle steel structure The impact of performance. The results show that with the increase of V / N content in steel, the amount of second phase particles dispersed in steel increases significantly and the yield strength increases significantly. The content of 0.01% vanadium contributes about 23 MPa to the yield strength. The dissolution temperature of V (C, N) particles during reheating of V-N microalloyed angle billet is less than 1 150 ℃. Controlling the low billet heating temperature is beneficial to improve the low temperature impact toughness of angle steel. The finishing temperature has a significant effect on the yield strength and toughness of the low vanadium steel, but it has little effect on the microstructure and properties of the high vanadium steel. The V-N micro-alloying design, the comprehensive performance of the angle was significantly improved, and the mechanical properties of the rolling process parameters are not sensitive to change, therefore, V-N microalloying technology for the actual production and application of angle.