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材料导报  2019, Vol. 33 Issue (z1): 416-419    
  金属与金属基复合材料 |
压水堆驱动机构钩爪激光与GTAW钴基合金堆焊层组织分析及性能表征
郭宝超1,2, 蒋恩1, 陈亮3,4
1 上海第一机床厂有限公司,上海 201308
2 上海交通大学材料科学与工程学院,上海 200240
3 核电安全监控技术与装备国家重点实验室,深圳 518172
4 深圳中广核工程设计有限公司,深圳 518172
Microstructure Analysis and Property Characterization of Laser and GTAW Co-base Alloy Cladding Layer of PWR CRDM Latch Arms
GUO Baochao1,2, JIANG En1, CHEN Liang3,4
1 Shanghai No.1 Machine Tool Works Co., Ltd., Shanghai 201308
2 School of Materials Science and Engineering, Shanghai Jiaotong University, Shanghai 200240
3 State Key Laboratory of Nuclear Safety Monitoring Technology and Equipment, Shenzhen 518172
4 China Nuclear Power Engineering Co., Ltd., Shenzhen 518172
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摘要 控制棒驱动机构(Control rod drive mechanism,CRDM)是压水堆反应堆本体中唯一的能动设备,是集结构力学、电磁学、流体力学、传热学、自动控制等于一体的设备。钩爪部件形状复杂、结构精密,是压水堆(PWR)一回路的运动执行部件,其销轴孔与齿部钴基合金堆焊层组织与性能要求极高。本工作通过氩弧焊(GTAW)、激光焊(LBW)两种工艺试验,获得了满足设计要求的工艺参数。对两种工艺获得的钴基合金堆焊熔敷层进行了组织表征与分析,比较了两种工艺熔敷层的宏观与微观形貌差异,对熔敷层显微硬度进行了测试与对比分析,对熔敷层界面处的Co、Cr、Fe等元素进行了线扫描,通过Fe元素的分布分析了两种不同熔敷层稀释率与硬度差异的关系。两种堆焊层均未观察到微裂纹、夹杂、气孔、未熔合等缺陷,激光熔敷钴基堆焊层晶粒最细,因细晶强化作用,其显微硬度也最高。
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郭宝超
蒋恩
陈亮
关键词:  驱动机构  钩爪  钴基合金  氩弧焊  激光焊  枝晶  显微硬度  稀释率    
Abstract: The control rod drive mechanism (CRDM ) is only active component in reactor system, involving structural mechanics, electromagnetics, fluid mechanics, heat transfer, and automatic control. The shape of the latch arms is complex and precise, the latch arms is the motion actuator in primary circuit of the pressurized water reactor (PWR), the cladding layer of pin hole and the ministry of latch arms tooth is welded by the cobalt alloy, so the microstructure and properties of the cladding layer have a great influence on the CRDM. In order to get the appropriate process parameters that meet the design requirements, we carried out the GTA welding and laser welding process test. In addition, we carried out the microstructure characterization and analysis of the cladding layer that welded by the cobalt alloy. We also have compared with the macro and micro morphology of the cladding layer that welded by GTA welding and laser welding, and tested the micro hardness of the cladding layer. The element Co, Cr, Fe of the cladding layer have been tested by the line scanning. The hardness of the two different cladding layer is relation to the dilution rate through the analysis distribution of element Fe. No microscopic cracks, the inclusion, air hole, fusion and other defects were observed in two different cladding layer. Because of the fine grain strengthening, the grain is the most fine in the cladding layer of laser welding. The micro hardness is also the highest in the cladding layer of laser welding
Key words:  control rod drive mechanism    latch arms    Co-base alloy    GTA welding    laser beam welding    dendrite    microhardness    dilution rate
               出版日期:  2019-05-25      发布日期:  2019-07-05
ZTFLH:  TG455  
作者简介:  郭宝超,上海第一机床厂有限公司,工程师,特殊工艺室主任,毕业于山东大学。发表十余篇论文,申请5项国家发明专利,其中2项已授权。参与3项国家科技重大专项,负责AP1000、CAP1400、华龙一号、高温气冷堆等多个核电项目的堆内构件或驱动机构的焊接技术工作。主要从事核岛主设备高能束焊接、焊接变形与控制、增材制造等方面研究工作。蒋恩,上海第一机床厂有限公司,高级工程师,技术部部长。发表论文十余篇,申请专利十余项,其中授权5项。主持过多个国家科技重大专项技术工作。参与了从30万千瓦到100万千瓦我国几乎全系列压水堆、高温气冷堆等的制造与技术工作。现担任华龙一号、CAP1400、AP1000等多个第三代压水堆堆内构件和驱动机构的技术负责人及我国首台600 MW快中子堆示范工程多个核岛机械设备设计负责人。主要从事核电设备精密加工、焊接、大型零部件精密装配与测量等领域技术研究。jiangen@shanghai-electric.com
引用本文:    
郭宝超, 蒋恩, 陈亮. 压水堆驱动机构钩爪激光与GTAW钴基合金堆焊层组织分析及性能表征[J]. 材料导报, 2019, 33(z1): 416-419.
GUO Baochao, JIANG En, CHEN Liang. Microstructure Analysis and Property Characterization of Laser and GTAW Co-base Alloy Cladding Layer of PWR CRDM Latch Arms. Materials Reports, 2019, 33(z1): 416-419.
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http://www.mater-rep.com/CN/  或          http://www.mater-rep.com/CN/Y2019/V33/Iz1/416
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