摘要
研究了核电站压力容器用Ａ５０８－３钢的酸溶氮与酸溶铝的不同比值（Ｎ／Ａｌ）对其组织和性能的影响。结果表明，Ｎ／Ａｌ比值增大，钢的塑性提高，但强度变化不大。韧脆转变温度（ＦＡＴＴ）和无塑性转变温度（ＮＤＴＴ）降低。当Ｎ／Ａｌ比值为０．３３～０．５４时，ＦＡＴＴ和ＮＤＴＴ明显降低；当Ｎ／Ａｌ比值为０．５４～０．８１时，ＦＡＴＴ和ＮＤＴＴ基本不变。显微组织分析结果表明，随Ｎ／Ａｌ比值的增大，晶粒细化；贝氏体铁素体板条束尺寸和碳化物颗粒直径减小，碳化物弥散度增大。
The effect of the acid soluble nitrogen/acid soluble aluminum ratio on the microstructure and properties of A508 3 steel for nuclear reactor pressure vessel has been investigated The experimental results show that the strength of the steel little changes as N/Al ratio increases,whereas the ductility increases and the FATT and NDTT decrease The FATT and NDTT decrease more obviously as N/Al ratio varies from 0 33 to 0 54,when N/Al ratio are 0 54 and 0 81 the FATT and NDTT not change The microstructure shows that as N/Al ratio increasing the grain refines,the size of bainite ferrite plates and the average diameter of carbides decrease,the carbides become more disperisive
出处
《钢铁》
CAS
CSCD
北大核心
1999年第1期39-43,共5页
Iron and Steel
