Mechanical properties of vacuum diffusion welded joints of low activation martensitic steel
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摘要: 在不同焊接工艺参数下对低活化马氏体钢进行真空扩散焊接试验，分别对焊缝区进行光学显微观察(OM)与扫描电镜观察(SEM)分析，并对焊件进行力学性能测试. 结果表明，低活化马氏体钢的焊后组织主要为板条马氏体及少量的残余奥氏体，焊缝结合状况良好；在一定范围内提高焊接温度、延长保温时间可以提升接头抗拉强度，但过高的温度及保温时间会导致奥氏体晶粒粗化，损害接头的抗拉强度及冲击韧性. 经过焊后热处理(正火+回火)的接头抗拉强度相对于热处理前有所降低，但组织稳定性及冲击韧性有一定改善.Abstract: The low-activated martensitic steel was subjected to vacuum diffusion welding test under different welding parameters. The microstructure of the weld zone was observed by optical microscope (OM) and scanning electron microscopy (SEM), and the mechanical properties of the welds were tested. The obtained microstructure of the low-activated martensitic steel welds is mainly composed of lath martensite and a small amount of retained austenite and exhibits preferable bonding effect. Increasing the welding temperature and prolonging the holding time in a certain range can improve the tensile strength of the joints. It also promotes the coarsening of austenite grain, which is detrimental to the tensile strength and impact toughness. The tensile strength of the joints after post weld heat treatment (normalizing + tempering) is lower than the as-welded one, but the microstructure stability and impact toughness of the welds are obviously improved.
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[1] Huang Q. Development status of CALM steel for fusion application[J]. Journal of Nuclear Materials, 2014, 455(s 1-3): 649 − 654.
[2] Jiang Zhizhong, Huang Jihua, Hu Jie, et al. Microstructure and mechanical properties of laser welded joints of CLAM steel used for fusion reactor[J]. Transactions of the China Welding Institution, 2012, 33(2): 5 − 8
[3] Jiang Zhizhong, Huang Jihua, Chen Shuhai, et al. Microstructure transformation and mechanical properties of electron beam welded joints of fusion CLAM steel[J]. Transactions of the China Welding Institution, 2011, 32(3): 45 − 48
[4] Giancarli, L M, Abdou M, Campbell D J, et al. Overview of the ITER TBM program[J]. Fusion Engineering and Design, 2012, 87(5): 395 − 402.
[5] Lei Yucheng, Li Zhennan, Zhu Yanshan, et al. Analysis of residual stress and hardness of T-joint on China low activation martensitic steel laser weld[J]. Transactions of the China Welding Institution, 2012, 33(6): 73 − 76
[6] Merola, M. Overview and status of ITER internal components[J]. Fusion Engineering and Design, 2014, 89(7): 890 − 895.
[7] 姜志忠, 黄继华, 胡 杰, 等. 聚变堆用CLAM钢激光焊接接头显微组织及性能[J]. 焊接学报, 2012, 33(2): 5 − 8 [8] Wang Chunfang, Wang Maoqiu, Dong Han. In-situ observation of deformation and fracture process for lath martensite steel[J]. Journal of Iron and Steel Research, 2012, 24(3): 38 − 43.
[9] 姜志忠, 黄继华, 陈树海, 等. 聚变堆用CLAM钢电子束焊接接头显微组织转变与力学性能[J]. 焊接学报, 2011, 32(3): 45 − 48 [10] Chen X, Huang Y, Madigan B, et al. An overview of the welding technologies of CLAM steels for fusion application[J]. Fusion Engineering and Design, 2012, 87(9): 1639 − 1646.
[11] Aubert, P, Tavassdi F, Rieth M, et al. Review of candidate welding processes of RAFM steels for ITER test blanket modules and DEMO[J]. Journal of Nuclear Materials, 2011, 417(1): 43 − 50.
[12] 雷玉成, 李振南, 朱延山, 等. CLAM钢激光焊T形接头残余应力及硬度分析[J]. 焊接学报, 2012, 33(6): 73 − 76 [13] Zhou X, Liu Y, Yu L, et al. Uniaxial diffusion bonding of CLAM/CLAM steels: microstructure and mechanical performance[J]. Journal of Nuclear Materials, 2015, 461: 301 − 307.
[14] 王春芳, 王毛球, 董 瀚. 板条马氏体钢变形与断裂过程的原位观察[J]. 钢铁研究学报, 2012, 24(3): 38 − 43 -
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