论文部分内容阅读
通过50kg真空炉冶炼不同含量铌钒复合的矿用锚杆钢,经中试轧制后,研究了铌钒含量对低碳微合金钢的组织及力学性能的影响。结果表明:铌钒复合锚杆钢比钒微合金锚杆钢的屈强比低0.3~0.4,晶粒度高0.5~1级,晶粒细化明显,易出现贝氏体,但经低温轧制+超快冷技术即可达到500MPa级性能要求。采用0.026%铌+0.03%V含量铌钒复合替代0.07%~0.08%V生产可获得高强度更高安全性能的低碳微合金锚杆钢。
The effect of niobium and vanadium content on the microstructure and mechanical properties of low-carbon micro-alloyed steel was studied by means of a 50kg vacuum furnace smelting mineralized steel with different content of vanadium and niobium. The results show that the yield ratio of niobium-vanadium composite steel is lower than that of vanadium micro-alloy steel by 0.3-0.4, and the grain size is 0.5-1. The grain refinement is obvious and bainite is easy to appear. However, System + ultra-fast cooling technology can reach 500MPa performance requirements. Instead of 0.07% ~ 0.08% V, 0.026% niobium + 0.03% V niobium vanadium is used to produce low-carbon micro-alloyed steel with high strength and safety.