with large welding heat input, more upper bainite and granular bainite form, which is benefit to improve the property of haz.
采用大的线能量焊接,形成较多的上贝氏体和粒状贝氏体组织,对改善接头性能有利。
the upper bainite transformation has not only essential difference but also intimate relation with pearlite decomposition;
上贝氏体转变与珠光体分解有着本质上的区别,但又有密切的联系;
themicrostructure of bonded zone consist of upper bainite and grain boundary ferrite.
接合部组织由晶界铁素体及晶内上贝氏体组成。