摘要
采用Formaster-Digital全自动相变仪测定了船板钢E36加热时的实际相变温度Ac1和Ac3,以及冷却时的实际相变温度Ar1和Ar3,同时测定了试样在不同冷却速度下的相变点,根据相变点绘制出了E36钢的奥氏体连续冷却转变曲线（CCT曲线）。通过分析不同冷却速度对E36钢的显微组织、晶粒度和硬度的影响,制定出了较合理的E36钢轧后控冷工艺：冷却速度5-10℃·s^-1,终冷温度550℃左右,然后空冷。该控冷工艺,保证了室温主要组织为F＋P,细化了铁素体（F）晶粒,同时保证了E36钢的硬度要求。
By means of fully automatic phase transformation tester （Formaster-Digital）, the actual phase trans/orrriation temperature when heating, i.e. , Ac1 and Ac3, and the actual phase transformation temperature when cooling, i. e. , An and At3, of ship plate steel E3G and phase transformation point of specimen at different cooling rate were measured. Based on phase transformation point, the continuous cooling transformation （CCT） curves of E36 were given. To analyze the effects of different cooling rate on microstructure, grain size and hardness of ship plate steel E36, more reasonable controlled cooling technology after rolling were established including cooling rate at 5-10 ℃ · s^-1 , finish-cooling temperature at about 550 ℃, and then air cooling. The controlled cooling technology not only ensures that the main organization is F＋P at room temperature, but also refines the ferrite grain （F）, meanwhile ensures the hardnessof ship plate steel E36
出处
《锻压技术》
CAS
CSCD
北大核心
2008年第1期47-49,共3页
Forging & Stamping Technology
基金
国家自然科学基金(50765005)
江西省自然科学基金(2007GZC1826)
江西省教育厅资助项目
关键词
控冷
船板钢
显微组织
晶粒度
controlled cooling
ship plate steel
microstructure
grain size
