新型耐热钢相变过程原位观察  

In-situ Observation of Phase Transformation Process of New Type of Heat Resistance Steel

作　　者：胡传顺[1] 秦华[1] 马喜龙[1] 

机构地区：[1]辽宁石油化工大学机械工程学院,辽宁抚顺113001

出　　处：《热加工工艺》2012年第18期31-32,35,共3页Hot Working Technology

基　　金：辽宁省教育厅科学技术研究项目(LS2010098)

摘　　要：采用CLSM对2.25Cr1Mo0.25V钢试样实施了连续加热和冷却处理,并进行了原位实时观察冷却过程中发生相变时的试样表面形貌。结果表明:通过原位观察分析,确定了连续冷却过程中转变相的析出位置、转变顺序、生长方向及形态;在冷却过程中,相变首先从一个晶粒开始,随后其他晶粒开始发生相变;相变由原奥氏体晶界析出,呈板条状向前生长;相变发生在贝氏体形成温度区间,相变开始温度490℃,贝氏体相变结束温度423℃。By CLSM,2.25Cr1Mo0.25V steel was treated with a continuously heating and cooling cycle and the surface morphology of the specimen was observed during phase transformation.The results show that by in-situ observation,nucleation location,transformation sequence,growth direction,and shape of phase transformation upon continuously cooling was determined.Upon cooling,phase transformation initiates within a grain.Then,the phase transformation occurs among other grains.The phase transformation starts to form initially along austenitic boundary and grows with lath-shape.The phase transformation occurs at the temperature range of bainite formation.The phase transformation starts at 490 ℃ and finishes at 423℃.

关 键 词：2.25Cr1Mo.025V钢 贝氏体 相变 原位实时观察 CLSM 

分 类 号：TG142.73[一般工业技术—材料科学与工程]