金属热处理 ›› 2021, Vol. 46 ›› Issue (10): 155-162.DOI: 10.13251/j.issn.0254-6051.2021.10.027

• 工艺研究 • 上一篇    下一篇

电站辅机中12Cr2Mo1VR/20MnMoNb异种钢接头焊接及热处理

银润邦1, 林宝森2, 莫其鹏1, 李志炜2, 郑周1, 谭宏2, 陈建彬1, 王炯铭2   

  1. 1.东方电气集团 东方锅炉股份有限公司, 四川 德阳 618000;
    2.国能(泉州)热电有限公司, 福建 泉州 362804
  • 收稿日期:2021-06-27 出版日期:2021-10-25 发布日期:2021-12-08
  • 作者简介:银润邦(1978—),男,高级工程师,主要研究方向为锅炉、压力容器焊接工艺及热处理工艺开发,E-mail:yinrb2005@163.com

Welding and heat treatment process of 12Cr2Mo1VR/20MnMoNb dissimilar steel joint in auxiliary equipment of power plant

Yin Runbang1, Lin Baosen2, Mo Qipeng1, Li Zhiwei2, Zheng Zhou1, Tan Hong2, Chen Jianbin1, Wang Jiongming2   

  1. 1. Dongfang Boiler Co., Ltd., Dongfang Electric Group, Deyang Sichuan 618000, China;
    2. Guoneng (Quanzhou) Thermal Power Co., Ltd., Quanzhou Fujian 362804, China
  • Received:2021-06-27 Online:2021-10-25 Published:2021-12-08

摘要: 针对电站辅机中的12Cr2Mo1VR/20MnMoNb异种钢接头,通过研究接头特征、材料(包括焊材)的高温许用应力、热处理温度、化学成分、室温力学性能等,设计出采用铁素体堆焊层进行过渡的方式,解决了该异种钢接头直接对接后不能热处理的问题。同时,通过试验分析,总结出12Cr2Mo1VR/20MnMoNb异种钢焊缝的焊接和热处理工艺:先在12Cr2Mo1VR坡口面堆焊F62P0-EB2R-B2R过渡层,对堆焊层进行(690±10) ℃热处理;之后堆焊层再与20MnMoNb相焊接,焊缝采用F69P0-H10Mn2NiMoA焊材,焊接后采用660±10 ℃热处理,或对接焊缝两侧分别控温热处理:堆焊层侧采用(660±10) ℃(或(665±15) ℃),管板侧采用(620±10) ℃(或(620±15) ℃)热处理。

关键词: 电站辅机, 12Cr2Mo1VR钢, 20MnMoNb钢, 异种钢接头, 焊接工艺, 热处理工艺

Abstract: For the 12Cr2Mo1VR/20MnMoNb dissimilar steel joints in the auxiliary equipment of the power station, the transition method of the ferrite surfacing layer was designed by studying the joint characteristics, high temperature allowable stress of the materials (including welding materials), heat treatment temperature, chemical composition and mechanical properties at room temperature, so to solve the problem that the directly connected dissimilar steel joints could not be heat treated. The welding and heat treatment processes of 12Cr2Mo1VR/20MnMoNb dissimilar steel weld are proposed as follows based on experimental analysis: First, the F62P0-EB2R-B2R transition layer is surfacing on the 12Cr2Mo1VR groove surface, and the surfacing layer is heat-treated at (690±10) ℃, then the surfacing layer and the 20MnMoNb steel are butted with F69P0-H10Mn2NiMoA welding material and treated at (660±10) ℃. Or both sides of the butt weld are treated at different temperatures: the surfacing layer side is treated at (660±10) ℃(or (665±15) ℃) and the tube sheet side is treated at (620±10) ℃(or (620±15) ℃).

Key words: auxiliary equipment of power plant, 12Cr2Mo1VR steel, 20MnMoNb steel, dissimilar steel joint, welding process, heat treatment process

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