【摘要】 在未控轧控冷的轧制工艺条件下,研究了Nb/V复合微合金化、Nb微合金化、V微合金化对Q345E棒材热轧态-40℃低温韧性的影响。结果表明,Nb/V复合微合金化钢和Nb微合金化钢强度高于V微合金化钢,V微合金化钢-40℃的低温韧性满足标准要求,Nb/V复合微合金化钢和Nb微合金化钢均不能满足标准要求。在未控轧控冷的工艺条件下,采用V微合金化Q345E钢是可行的。更多还原

【Abstract】 The effects of Nb/V multiple micro-alloyed, Nb micro-alloyed and V micro-alloyed steel on low-temperature toughness (-40℃) of Q345E bar were researched under common rolling. The results show that the intension of steel bar of Nb/V multiple micro-alloyed and Nb micro-alloyed is higher than that of V micro-alloyed steel. But low-temperature toughness (-40℃) of V micro-alloyed steel meets standard, Nb/V multiple micro-alloyed and Nb micro-alloyed steel dissatisfy standard. Under common rolling, using V micro-alloyed steel Q345E bar is feasible.更多还原