磁场对25CrMo48V超高强度钢回火组织与力学性能的影响  

Effect of magnetic field on tempered microstructure and mechanical properties of 25CrMo48V ultra-high strength steel

作　　者：杨晓斌 董纪 田春英 宁保群[2] 赵倩 乔志霞[3] 刘永长[4] Yang Xiaobin;Dong Ji;Tian Chunying;Ning Baoqun;Zhao Qian;Qiao Zhixia;Liu Yongchang(School of Mechanical Engineering,Tianjin Sino-German University of Applied Sciences,Tianjin 300350,China;School of Materials Science and Engineering,Tianjin University of Technology,Tianjin 300384,China;School of Mechanical Engineering,Tianjin University of Commerce,Tianjin 300134,China;Stale Key Laboratory of Water Safety and Simulation,School of Materials Science&Engineering,Tianjin University,Tianjin 300354,China)

机构地区：[1]天津中德应用技术大学机械工程学院,天津300350 [2]天津理工大学材料科学与工程学院,天津300384 [3]天津商业大学机械工程学院,天津300134 [4]天津大学材料科学与工程学院水利安全与仿真国家重点实验室,天津300354

出　　处：《金属热处理》2022年第8期24-33,共10页Heat Treatment of Metals

基　　金：国家自然科学基金青年项目(52004181,51804218);天津市科技特派员项目(20YDTPJC01130)。

摘　　要：为研究磁场作用下热处理工艺对超高强度钢组织调控及碳化物种类、形态、尺寸和演变规律的影响,采用OM、SEM、TEM、EBSD和力学性能测试等技术手段研究了磁场作用对含有Nb、V、Ti等微合金元素的25CrMo48V超高强度钢中组织演变与力学性能的影响。试样均在1000℃下进行30 min奥氏体化处理,水淬之后在1 T磁场作用下,在200~600℃温度范围内回火1 h。结果表明,磁场的施加会抑制马氏体板条合并,促进M_(23)C_(6)和M_(7)C_(3)型碳化物的析出。经外加1 T磁场不同温度回火后,试样的硬度均高于未加磁场的常规回火处理试样,而其强度低于常规回火处理。In order to study the influence of magnetic field heat treatment on microstructure control of ultra-high strength steel and the type, shape, size and evolution of carbides, the effect of magnetic field on structure evolution and mechanical properties of the 25 CrMo48 V microalloyed ultra-high strength steel contaming Nb, V,Ti was studied by means of OM, SEM, TEM, EBSD and mechanical property test. All the specimens were austenitized at 1000 ℃ for 0.5 h, quenched with water, and then tempered at 200-600 ℃ for 1 h under the action of 1 T magnetic field. The rescuts show that the application of magnetic field will inhibit the merging of martensite laths and promote the precipitation of M_(23)C_(6) and M_(7)C_(3) type carbides. When tempered at different temperatures under the action of 1 T magnetic field, the hardness of the specimens is higher than that of the conventional tempering without magnetic field, but the strength is lower.

关 键 词：磁场热处理 微合金化 微观结构 碳化物 力学性能 

分 类 号：TG156.97[金属学及工艺—热处理]