在试验室模拟薄板坯连铸连轧过程,板坯均热后被轧制到7mm厚并通过控冷来模拟辊道冷却和带钢的缓慢卷取过程.本文选用低碳钢,研究了V、N、Nb微合金化对其组织和性能的影响.通过试验证明在V-N钢中加入Nb对钢的强化机制有较大影响,使V-N-Nb钢中的析出强化增大,这表明V-N-Nb微合金化可充分地发挥微合金元素在钢中的析出强化作用,析出强化对屈服强度的贡献比V-N微合金化提高17MPa.
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