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.
作者
杨晓斌
董纪
田春英
宁保群
赵倩
乔志霞
刘永长
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)
出处
《金属热处理》
CAS
CSCD
北大核心
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)。
关键词
磁场热处理
微合金化
微观结构
碳化物
力学性能
magnetic field heat treatment
microalloying
microstructure
carbide
mechanical properties
