唐国翌
,
郑炀曾
,
蔡其巩
,
朱静
金属学报
本文研究了化学成分和凝固后的冷却速度对V-Ti-N钢晶粒粗化温度(T_(GC))的影响。结果表明,微量Ti的加入可在钢中产生大量10um左右的细小含Ti颗粒,从而显著提高T_(GC)。当冷速大于某一临界值时,T_(GC)不随冷速的变化而升高。在模拟150mm连铸坯冷却条件时,T_(GC)对氮含量的变化不敏感。加入0.33wt-％Mo可使T_(GC)降低约100℃。T_(GC)对冷却条件的敏感性与Ti,N含量有关。
关键词:
微合金化钢
,
grain coarsening temperature
,
cooling rate after solidification
,
null
薛润东
,
谢建新
,
李杏娥
钢铁研究学报
采用金相法、相分析、X射线衍射技术,定量研究了不同钛含量的微合金高强钢加热温度及保温时间对奥氏体晶粒长大尺寸的影响,以及其析出特性对力学性能的影响.结果发现,当加热温度达1000～1150℃时,在保温时间相同时,B钢奥氏体晶粒尺寸小；但当温度升高到1150℃以上时,B钢奥氏体晶粒尺寸快速增大,粗大的含钛颗粒对奥氏体晶粒长大几乎无阻碍作用.随钢中钛含量增加,A、B钢中的MC析出相的量分别占M3C相析出总量的7.5％、159.0％(质量分数,下同).MC与M3C的质量比增大,则其对应钢的强度值也增大.A、B钢中10 nm以下的析出相质量分数分别为2.2％、21.7％.
关键词:
晶粒粗化温度
,
X射线衍射
,
碳化钛
,
沉淀强化
,
力学性能
TANG Guoyi ZHENG Yangzeng Yanshan University
,
Qinhuangdao
,
ChinaCAI Qigong
,
ZHU Jing Central Iron and Steel Research Institute
,
Ministry of Metallurgical Industry
,
Beijing
,
China TANG Guoyi
,
Dept.of Graduates
,
Central Iron and Steel Research Institute
,
Ministry of Metallurgical Industry
,
Beijing 100081
,
China
金属学报(英文版)
The effects of chemical composition and cooling rate after solidication on the grain coarsening temperature,T_(GC),of the V-Ti-N microalloyed steels have been investigated.It is shown that the T_(GC) may be obviously raised by adding even a little Ti to the base steel so as to pre- cipitate a great deal of fine Ti-bearing particles of about 10 nm.The T_(GC) does not increase with the cooling rate,as it is over a certain critical value.The T_(GC) is insensitive to any varia- tion of N content at simulated cooling condition of 150 mm continuous cast slab.The T_(GC) may be dropped down about 100℃ by adding 0.33 wt-%Mo to the steels.The sensitivi- ty of T_(GC) to cooling condition relates to the Ti and V contents.
关键词:
microalloyed steel
,
null
,
null
