热处理对Q345B钢基堆焊复合板显微组织及力学性能的影响  

Effect of heat treatment on microstructure and mechanical properties of Q345B steel-based surfacing composite plate

作　　者：陈友明 佟海云[2] 郑毅力 赵玉萍[3] 李滔 储爱民 CHEN You-ming;TONG Hai-yun;ZHENG Yi-li;ZHAO Yu-ping;LI Tao;CHU Ai-min(Health Maintenance for Mechanical Equipment Key Lab of Hunan Province,Hunan University of Science and Technology,Xiangtan 411201,China;Measurement Center of Inner Mongolia Baogang Ganglian Co Ltd,Baotou 014010,China;School of Civil and Engineering,Hunan University of Science and Technology,Xiangtan 411201,China;School of Materials Science and Engineering,Hunan University of Science and Technology,Xiangtan 411201,China)

机构地区：[1]湖南科技大学机械设备健康维护湖南省重点实验室,湖南湘潭411201 [2]内蒙古包钢钢联股份有限公司计量中心,内蒙古包头014010 [3]湖南科技大学土木工程学院,湖南湘潭411201 [4]湖南科技大学材料科学与工程学院,湖南湘潭411201

出　　处：《材料热处理学报》2023年第8期34-42,共9页Transactions of Materials and Heat Treatment

基　　金：国家自然科学基金(52174344);湖南省自然科学基金(2021JJ30249,2021JJ30250,2023JJ30222);湖南省大学生创业训练项目(S202210534024X)。

摘　　要：采用CO_(2)气体保护焊方法,在Q345B钢基体表面堆焊YD212型焊丝形成复合板。研究了淬火、正火和喷液淬火+回火3种热处理工艺对复合板显微组织与力学性能的影响,并与未热处理复合板进行比较。结果表明:3种热处理工艺均使复合板的熔合层和堆焊层显微组织发生了改变,同时也使基板层珠光体含量发生变化。热处理使复合板的各层硬度均有不同程度的提高,其中正火处理的提升幅度较小。采用喷液淬火+回火热处理得到的复合板,其基板层珠光体含量较高,硬度和韧性显著提高,熔合区韧性明显改善,堆焊层硬度优良,其冲击吸收能量是未热处理复合板的1.57倍。Using CO_(2) gas shielded welding method,YD212 type welding wire was deposited on the surface of Q345B steel substrate to form a composite plate.The effects of three heat treatment processes,namely quenching,normalizing,and spray quenching+tempering,on microstructure and mechanical properties of the composite plate were studied,and compared with untreated composite plate.The results show that the microstructure of fusion zone and surfacing layer of the composite plate are changed by three heat treatment process,in addition,the pearlite content of the substrate layer is also changed.The hardness of each layer of the composite plate is improved by heat treatment in varying degrees,among them,the increment of the normalized composite plate is smaller.The composite plate treated by spray quenching and tempering heat treatment has a higher content of pearlite in the substrate layer,significantly improves hardness and toughness,and significantly improves toughness in the fusion zone.The hardness of the surfacing layer is excellent,and its impact absorbed energy is 1.57 times that of the untreated composite plate.

关 键 词：Q345B钢 堆焊 热处理 显微组织 力学性能 

分 类 号：TB331[一般工业技术—材料科学与工程]