摘要
热轧后的冷却模式影响微合金高强钢的组织和析出,从而影响最终性能。在实验室对一种Ti-Nb微合金高强钢进行了前段快冷和后段快冷两种模式的热模拟试验,研究了冷却模式对Ti-Nb微合金高强钢组织和性能的影响。同时根据实验室研究结果,在国内某热连轧带钢厂对类似钢种进行了工业试验。结果表明：采用后段快冷模式,试样的晶粒尺寸（3.10μm）比前段快冷试样的晶粒尺寸（4.07μm）要小,且后段快冷试样析出物的体积分数（1.04%）比前段快冷试样析出物的体积分数（0.81%）大,后段冷却模式具有更好的细晶强化和析出强化作用。
The cooling mode after hot rolling affects microstructure and precipitation of high-strength microalloyed steel,and thus affects the final properties. Thermal simulation test of a high-strength Ti-Nb microalloyed steel was conducted with former-fast-cooling（ FFC） and laterfast-cooling（ LFC） modes in laboratory to study the effect of cooling modes on microstructure and property of a high-strength Ti-Nb microalloyed steel. Based on the results of laboratory experiments,an industrial trial was carried out with the similar steel in a continuous hot strip production mill. The results indicate that the grain size in LFC sample（ 3. 10 μm） is smaller than that in FFC sample（ 4. 07 μm）,the volume fraction of precipitates in LFC sample（ 1. 04%） is more than that in FFC sample（ 0. 81%）,and the LFC mode has better fine-grain strengthening and precipitation strengthening.
作者
黄浩
徐光
胡海江
Huang Hao, Xu Guang, Hu Haijiang(Key Laboratory for Ferrous Metallurgy and Resources Utilization of Ministry of Education, Wuhan University of Science and Technology, Wuhan Hubei 430081, Chin)
出处
《金属热处理》
CAS
CSCD
北大核心
2018年第3期114-119,共6页
Heat Treatment of Metals
基金
国家自然科学基金面上项目(51274154)
关键词
Ti-Nb微合金钢
冷却模式
显微组织
析出
性能
Ti-Nb microalloyed steel
cooling mode
microstructure
precipitation
properties
