摘要
利用热模拟试验机对30CrMnTi钢的奥氏体连续冷却转变(CCT)曲线进行了测定和分析。结果表明:当冷却速度小于1℃/s时,可以得到铁素体+珠光体组织;当冷却速度达到1℃/s时,即出现贝氏体组织;当冷却速度达到10℃/s时,组织基本转变为马氏体。在工业试生产时,通过控制冷却增加在珠光体转变区域的过冷度,同时延长珠光体转变温度区间的停留时间,可以获得晶粒大小合适的铁素体和珠光体组织。
The continuous cooling transformation（CCT） curves of 30 CrMnTi steel were determined and analyzed by using the thermal simulation testing machine.The results show that ferrite and pearlite in 30 CrMnTi steel can be obtained when the cooling rate is under 1 ℃/s,and bainite begins to appear when the cooling rate is up to 1 ℃/s.When the cooling rates is higher than 10 ℃/s,the transformation phase is mainly martensite.In the industrial trial production,the suitable size grain of ferrite and pearlite can be obtained by means of controlling the cooling rate to increase the undercooling of pearlite transformation and to prolong the retention time at pearlite transformation temperature.
出处
《金属热处理》
CAS
CSCD
北大核心
2016年第8期41-44,共4页
Heat Treatment of Metals
关键词
热模拟
动态CCT曲线
热膨胀法
30CrMnTi钢
thermal simulation
continuous cooling transformation curve
dilatometry
30CrMnTi steel
