冷却速度对Nb-V微合金化高强度钢显微组织的影响-钢铁钒钛.PDF

31 3 Vo.l 31, N o. 3 2010 7 IRON STEEL VANADIUM T ITAN IUM July 2010 Nb-V 陈振业, 陈子刚, 秦秀英 (, 056015) : , THERME MASTOR - Z ; ZeissAxioplan2, , , , , ,; , : ; ; T; : TG1421 1 : A : 1004- 7638( 2010) 03- 0059- 04 Influence of Cooling Speed onM icrostructure ofNb-V M icroalloyed High Strength Steel hen Zhenye, hen Zigang, Q in X iuying (Handan Iron and SteelG roup o. , Ltd. , HBIS, Handan 056015, Hebe,i hina) Abstract: The experiments of a m icroalloyed high strength steel under heating, heat preservation and cooling at different speedswere conducted on the therm a-l simulator ofTHERME MASTOR- Z. And the m icrostructurewas observed by ZeissAxioplan2 universalmetallographic opticalm icroscope. The effects of cooling speed on m icrostructure and phase transformation of the m icroalloyed high strength steelwere analyzed. It has been found that the temperature points and temperature range of phase transformation de- creasewith the increase of the cooling speed. The ferrite grainw ill be refined and the ferrite amountw ill decreasew ith the increase of cooling speed. At the same tim e, deform ation can promote phase transform a- tion. Key words:m icroalloyed stee;l cooling speed; static T curve; m icrostructure 轧控冷加工工艺, 通过控制微合金元素的固熔析出 0 引言 [ 2] 行为, 达到细化晶粒和沉淀强化的目的 微合金高强度钢以其较高的强度和优良的性能 笔者利用 THERME MASTOR- Z 热模拟试验 成为市场需求的新趋势, 所以微合金高强度钢的开发 机和电子显微镜等手段, 研究了一种 Nb-V 微合金