核电站控制棒驱动机构棘爪销孔堆焊技术研究  

Surfacing technology of pawl and pin hole in control rod drive mechanism

作　　者：吕永红[1] 周建明[1] 白冰[1] 卢朝晖[1] 向文元[1] 黄文有[1] 郑继雷 

机构地区：[1]中国广东核电集团中科华核电技术研究院有限公司,深圳市518124 [2]成都瑞迪机械实业有限公司,610035

出　　处：《焊接》2012年第11期32-35,70,共4页Welding & Joining

基　　金：国家科技支撑计划项目:百万千瓦级压水堆核电站控制棒驱动系统研究开发(2011BAA06B01)

摘　　要：为确保核电站控制棒驱动机构的核心运动部件——棘爪在60年全寿命周期的安全可靠性,以及运动时具有良好的耐磨性和韧性,采用氧乙炔堆焊方法对棘爪表面和销孔进行钴基合金堆焊。通过自主技术攻关,堆焊后的棘爪在模拟核电站反应堆压力容器高温高压的运行环境下,完成了1 000万次的寿命考验,并具备了批量化工程应用的能力,打破了国外的技术垄断,填补了国内该领域的空白。文中主要对近5年的技术研究进行总结,详细描述了制约核电站控制棒驱动机构国产化的一种关键技术。As a key moving part in the control rod drive mechanism,the safety and reliability of the pawl should be ensured in the 60 years of the total life cycle,and it should have good abrasion resistance and toughness.Cobalt base alloy was deposited on the surface on the pawl and the pin hole with oxygen - acetylene welding process.Surfaced the pawl completes the life test of 10000000 times in a simulated nuclear reactor pressure vessel under high temperature and high pressure environment,which can be applied in engineering in quantity.The technical research in the least five years were summarized,and a detailed description of the constraints of control rod drive mechanism is a key technology in domestic.

关 键 词：核电站 控制棒驱动机构 棘爪 钴基合金堆焊 

分 类 号：TG455[金属学及工艺—焊接]