摘要
研究了回火温度对15Cr5MoVRE油井管钢组织和第二相析出行为规律的影响。利用箱式热处理炉对试验钢进行了热处理,采用光学显微镜和透射电镜对回火后的组织及第二相进行了观察分析,采用硬度计与拉力试验机对试验钢回火后的力学性能进行了测试。结果表明,15Cr5MoVRE油井管钢,经900℃保温50 min水淬,670~710℃回火保温90 min,组织为回火屈氏体和回火索氏体,析出的第二相碳化物类型均为M_(7)C_(3)型和M_(23)C_(6)型。随着回火温度的升高,第二相碳化物颗粒数量明显增多,尺寸逐渐增大,且在710℃回火时发生团聚。回火温度为690℃时,铁素体基体上有大量细小的第二相碳化物均匀析出,力学性能最优,试验钢的最佳回火温度应为690℃。
The effects of tempering temperature on the microstructure and the second phase precipitation behavior of 15Cr5MoVRE oil well pipe steel were studied.The test steel was heat-treated in a box-type heat treatment furnace.The microstructure and second phase of the tempered steel were observed and analyzed by optical microscope and transmission electron microscope.The mechanical properties of the tempered steel were tested by hardness tester and tensile testing machine.The results show that the microstructure is tempered sorbite and tempered troostite by water quenching after holding at 900℃for 50 min and tempering at 670-710℃for 90 min,the type of precipitated second phase carbide are M_(7)C_(3) and M_(23)C_(6) in 15Cr5MoVRE oil well pipe steel.With the increase of tempering temperature,the number and size of the second phase carbide particles increase significantly,and agglomeration occurs at 710℃.A large number of fine second phase carbides are precipitated uniformly on the ferrite matrix,and the mechanical properties of the test steel are the best when the tempering temperature is 690℃.The optimum tempering temperature is 690℃in current conditions.
作者
白岩松
李涛
韩强
梁占磊
BAI Yansong;LI Tao;HAN Qiang;LIANG Zhanlei(School of Materials and Metallurgy,Inner Mongolia University of Science and Technology,Baotou 014010,China)
出处
《热加工工艺》
北大核心
2024年第4期107-110,114,共5页
Hot Working Technology
基金
内蒙古自治区省自然科学基金项目(2021LHMS05028)。
