摘要
采用Formaster-F型全自动相变仪测定了含Mo和不含Mo的N80级ERW石油套管用钢的静态CCT曲线,通过光学显微镜观察两种钢不同冷却速度下的显微组织,结果表明,N80级ERW石油套管试验钢的临界点Ac_(1)、Ac_(3)基本不受Mo元素的影响,试验钢1和试验钢2开始生成马氏体组织的临界冷速均为8℃/s。由于Mo元素的加入,扩大了N80级ERW石油套管试验钢贝氏体相变的冷速区间范围,并且使该试验钢的组织得到了细化。
The static continuous cooling transformation(CCT)curves of N80 grade steel for ERW oil casing with and without Mo are determined by Formaster-F full automatic phase transformation meter as well as the microstructures of the two types of steel at different cooling rates are observed with optical microscope.The results showed that the critical points of test steels of N80 grade steel for ERW oil casing,Ac_(1)and Ac_(3)were basically not affected by Mo element as well as the critical cooling rate for test steel 1 and 2 to start generating martensitic structure was 8℃/s.The interval range of cooling rate for bainite transformation of the test steels is expanded due to addition of Mo element and their microstructures are refined.
作者
白雅琼
杨维宇
张晓磊
Bai Ya-qiong;Yang Wei-yu;Zhang Xiao-lei(Technical Center of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China;Rare Earth Steel Plate Plant of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China;Organizational and Personnel Dept.of Inner Mongolia Baotou Steel Union Co.,Ltd.,Baotou 014010,Inner Mongolia Autonomous Region,China)
出处
《包钢科技》
2022年第6期37-40,89,共5页
Science & Technology of Baotou Steel
关键词
N80级ERW石油套管用钢
相变
显微组织
N80 grade steel for ERW oil casing
phase transformation
microstructure
