摘要
文章以3Cr耐腐蚀油井管用钢为研究对象,利用FORMASTOR-F全自动相变仪,测定了实验钢的相变点和过冷奥氏体连续冷却转变CCT曲线,采用蔡司显微镜对不同冷速处理后的试样进行了组织分析。实验结果表明,3Cr耐腐蚀油井管用钢的相变点Ac1为730℃,Ac3为830℃。当冷速为0.1~0.5℃/s时,室温组织为先共析铁素体+贝氏体;冷却速度为0.5~0.8℃/s时,室温组织为铁素体+贝氏体+马氏体,当冷速为1~3℃/s时获得马氏体+贝氏体混合组织;当冷速大于3℃/s时获得马氏体组织。
In this paper,the phase transition points of test steel and continuous cooling transformation( CCT) curve of supercooled austenite were determined with the FORMASTOR-F full automatic phase transformation instrument as well as the microstructure of specimen processed at different cooling rates was analyzed with the Zeiss microscope by taking the 3 Cr corrosion resistant oil well pipe steel as the object of study. The experimental results showed that the phase transition points of 3 Cr corrosion resistant oil well pipe steel Ac1 was 730 ℃ and Ac3 was 830 ℃. When the cooling rate was at0. 1 ~ 0. 5 ℃/s,the microstructure at room temperature was proeutectoid ferrite + bainite,when the cooling rate was at0. 5 ~ 0. 8 ℃/s,the microstructure at room temperature was ferrite + bainite + martensite,when the cooling rate was at1 ~ 3 ℃/s,the microstructure was mixed martensite + bainite and the martensite structure was obtained when the cooling rate was greater than 3 ℃/s.
作者
詹飞
石晓霞
Zhan Fei;Shi Xiao-xia(Steel Tube Co. of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010,Inner Mongolia Autonomous Region, China;Technical Center of Inner Mongolia Baotou Steel Union Co., Ltd., Baotou 014010,Inner Mongolia Autonomous Region, China)
出处
《包钢科技》
2019年第4期52-55,共4页
Science & Technology of Baotou Steel
