稠油热采井用25CrMoBVRE钢管的调质工艺研究  

Study on Quenching and Tempering Process for 25CrMoBVRE Steel Pipe for Heavy Oil Thermal Recovery Well

作　　者：石晓霞 李晓[2] 任慧平[1] 李静[2] 赵艳辉 SHI Xiaoxia;LI Xiao;REN Huiping;LI Jing;ZHAO Yanhui(Inner Mongolia University of Science&Technology,Baotou 014010,China;Inner Mongolia Baogang Ganglian Co.,Ltd.,Baotou 014010,China)

机构地区：[1]内蒙古科技大学,内蒙古包头014010 [2]内蒙古包钢钢联股份有限公司,内蒙古包头014010

出　　处：《钢管》2020年第5期56-60,共5页Steel Pipe

摘　　要：25CrMoBVRE是非API稠油热采井用套管BT1O0H用钢。研究25CrMoBVRE试验钢的调质工艺,分析了不同淬火工艺、回火工艺下25CrMoBVRE钢的组织和性能。25CrMoBVRE钢淬火后的组织为板条状马氏体,随着淬火温度的增加,板条状马氏体分布均匀性增加,原始奥氏体晶粒逐渐长大。随着回火温度的升高,试样的强度降低,塑性和韧性明显改善;随着回火保温时间的延长,试样的屈服强度、抗拉强度略有下降,延伸率及冲击功改善不明显;随着回火温度的提高或保温时间的延长,碳化物呈颗粒状分布在晶界和晶内,晶粒趋于回复,成为等轴状晶粒。Studied in the paper is the quenching&tem pering process for the experimental 25CrMoBVRE steelwhich is a non-API BT10OH steel for the oil casing as serving in the heavy oil thermal recovery well,involving analysisof microstructures and properties thereof as indicated on the conditions of specific quenching and tempering processes.Asa result the facts as follows are revealed.The after-quenching microstructure of the 25CrMoBVRE steel is of the lathmartensite,and along with increase of the quenching temperature,the distribution homogeneity of the lath martensite isincreased too,meanwhile the grain size of the primary austenite is getting enlarged gradually.And along with rising up ofthe tempering temperature,the strength of the specimen is reduced,whereas both plasticity and toughness of it areimproved obviously;owing to the extension of the tempering-holding duration,the yield strength and tensile strength ofthe specimen are so slightly reduced,while the elongation rate and the impact energy are so little changed;due to risingup of the tempering temperature or the extension of the holding duration,the granular carbides are distributed in thecrystal boundary and in the crystal itself,while the grain is returming to its original form,i.e.the equiaxial grain.

关 键 词：套管 稠油热采 BT100H 25CrMoBVRE 调质工艺 

分 类 号：TG156[金属学及工艺—热处理]