摘要
对铌钒微合金化高碳钢的奥氏体晶粒尺寸、连续冷却转变动态曲线(CCT图)以及等温转变曲线(TTT图)进行了测定,研究加热温度、冷却速度和保温温度对组织性能的影响。结果表明:实际生产中,应将加热温度控制在1100℃以下,避免奥氏体晶粒的粗化;相变前冷速控制在8 K/s以上,相变温度为620~650℃,相变温度区间内冷速控制在1.0~2.5 K/s,可获得均匀的索氏体组织和较好的性能。
The austenitic grain size,CCT curve and TTT curve of Nb-V microalloyed high carbon steel were investigated. The effect of heating temperature,cooling rate and isothermal transformation temperature on microstructure and properties of the steel was studied. The results show that the furnace temperature must be controlled below 1100 ℃ to avoid the austenite grain coarsening,and the homogeneous sorbite and good properties can be obtained for the rolled steel under cooling rate from 1. 0 to 2. 5 K / s between 620 to 650 ℃ with initial cooling rate higher than 8 K / s before transformation.
出处
《材料热处理学报》
EI
CAS
CSCD
北大核心
2014年第S2期134-139,共6页
Transactions of Materials and Heat Treatment
关键词
晶粒度
热模拟
控制冷却
显微组织
grain size
thermal simulation
controlled cooling
microstructure
