论文部分内容阅读
利用小型试验轧机,对Nb-V微合金钢进行了(γ+α)双相区控轧试验。研究了终轧温度对钢的显微组织和力学性能的影响。定量估算了钢中的固溶强化σ_s,析出强化σ_p,位错强化σ_d,亚晶强化ck_s l~(-1/2)和晶粒细化的强化效应k_y d~(-1/2)。建立了一个新的有关低碳微合金化控轧钢的屈服强度关系式: σ_y=σ_i+σ_s+[σ_p~2+σ_d~2+(ck_s l~(-1/2))~2]~(1/2)+k_y d~(-1/2)用该式计算的σ_y值与实验结果符合得相当好。
The (γ + α) dual-phase controlled rolling test of Nb-V microalloyed steel was carried out with a small pilot mill. The effect of finishing temperature on the microstructure and mechanical properties of steel was investigated. The solid solution strengthening σ_s, precipitation strengthening σ_p, dislocation strengthening σ_d, subgrain strengthening ck_s 1 ~ (-1/2) and strengthening effect k_y d ~ (-1/2) of grain refinement were quantitatively estimated. A new relationship between yield strength of low carbon microalloyed controlled rolled steel was established: σ_y = σ_i + σ_s + [σ_p ~ 2 + σ_d ~ 2 + (ck_s l ~ (-1/2)) ~ 2] / 2) + k_y d ~ (-1/2) The value of σ_y calculated by this formula is in good agreement with the experimental result.