摘要
对一种新开发的新型核电承压设备用低合金钢进行了CCT曲线的测定。结果表明,随冷却速率的增加,组织由贝氏体向马氏体转变,维氏硬度增加;该低合金钢相变临界点为Ac1=736℃、Ac3=826℃。在0.1~1.0℃/s冷却速度条件下,钢的组织为贝氏体组织,当冷速为2~5℃/s时,钢的组织主要为板条马氏体组织,并存在部分贝氏体组织;冷速为10~100℃/s时,钢的组织为马氏体组织。
A new type of low alloy steel used in nuclear power pressure equipment was tested for CCT curves. The results show that the microstructure changes from bainite to martensite and Vickers hardness increases with the increase of cooling rate. The critical point of phase change of low alloy steel is Ac1=736 ℃, Ac3=826 ℃. Under the condition of 0.1-1.0 ℃/s cooling rate, the microstructure of the steel is bainite structure. When the cooling rate is 2-5℃/s, the microstructure of the steel is mainly lath martensite, and some bainite structure exist. When the cooling rate is 10-100 ℃/s, the microstructure of the steel is martensite.
作者
宁冬
吴家林
代成仁
景益
孙坚
NING Dong;WU Jialin;DAI Chengren;JING Yi;SUN Jian(School of Materials Science and Engineering,Shanghai Jiaotong University,Shanghai 200240,China;Shanghai Nuclear Engineering Research and Design Institute Co.,Shanghai 200233,China)
出处
《热加工工艺》
北大核心
2021年第10期141-143,共3页
Hot Working Technology
关键词
核电
低合金钢
CCT曲线
冷却速度
nuclear power
low alloy steel
CCT curve
cooling rate
