过热器管道CMT立向下自动堆焊修复工艺研究
Study on the CMT Downward Automatic Surfacing Repair Process for Overheater Pipelines
- 2025年55卷第12期 页码:39-44
收稿:2025-07-08,
修回:2025-08-22,
纸质出版:2025-12-20
DOI: 10.7512/j.issn.1001-2303.2025.12.06
移动端阅览

浏览全部资源
扫码关注微信
收稿:2025-07-08,
修回:2025-08-22,
纸质出版:2025-12-20
移动端阅览
为解决某高硫煤种的超超临界火电机组12Cr1MoV钢过热器管因高温侵蚀、颗粒冲刷导致的减薄开裂失效问题,提出CMT立向下堆焊ERNiCrMo-3镍基焊丝的修复方法,研究送丝速度(7~11 mm/min)、摆动周期前进长度(1~5 mm)、摆宽(5~9 mm)、焊接速度(200~400 mm/min)对焊道成形(熔宽、余高、接触角)的影响,并对堆焊接头的组织和性能进行测试分析。结果表明,送丝速度(电流、电压)和焊接速度对焊道成形的影响相对较大;摆动周期前进长度与摆宽通过调控接触角优化焊缝搭接质量,余高可通过摆动周期前进长度调控。最优工艺参数下(送丝速度10 mm/min、焊接速度300 mm/min、摆宽7 mm、摆动周期前进长度3 mm),堆焊层厚度达2~3 mm,无裂纹、气孔等缺陷,与母材形成良好冶金结合。力学性能测试显示,堆焊层平均硬度 233.4 HV,高于母材的 157 HV;堆焊熔合面剪切强度545 MPa,优于母材标准要求(490 MPa)。焊缝组织为γ固溶体+析出相,过热区组织为贝氏体,正火区组织为贝氏体+少量珠光体,珠光体显著球化,不完全正火区组织为铁素体+贝氏体+珠光体,母材组织为铁素体+珠光体。该研究成果可以给12Cr1MoV过热器管的高效高质量修复提供参考。
To address the thinning and cracking failure issues caused by high-temperature corrosion and particle erosion in 12Cr1MoV steel superheater tubes of ultra-supercritical coal-fired power units burning high-sulfur coal
a repair method using CMT downward vertical surfacing with ERNiCrMo-3 nickel-based welding wire was proposed. The effects of wire feeding speed (7-11 mm/min)
oscillation forward distance per cycle (1-5 mm)
weaving width (5-9 mm)
and welding speed (200-400 mm/min) on weld bead formation (weld width
reinforcement height
contact angle) were investigated. Microstructure and mechanical properties of the surfacing joints were systematically analyzed.
Results
2
indicated that wire feeding speed (current
voltage) and welding speed had relatively significant influences on weld bead geometry. The oscillation forward distance and weaving width optimized weld overlapping quality through contact angle adjustment
while reinforcement height could be controlled by oscillation forward distance. Under optimal process parameters (wire feeding speed: 10 mm/min; welding speed: 300 mm/min; weaving width: 7 mm; oscillation forward distance: 3 mm)
the surfacing layer thickness reached 2-3 mm without defects like cracks or porosity
achieving metallurgical bonding with the base metal. Mechanical testing showed the surfacing layer exhibited an average hardness of 233.4 HV
higher than the base metal's 157 HV. The shear strength at the fusion interface reached 545 MPa
exceeding the required standard for base metal (490 MPa). Microstructural analysis revealed γ solid solution + precipitates in the weld zone
bainite in the overheated zone
bainite + minor pearlite in the normalized zone with significantly spheroidized pearlite
ferrite + bainite + pearlite in the incompletely normalized zone
and ferrite + pearlite in the base metal. This study provides reference for efficient and high-quality repair of 12Cr1MoV superheater tubes.
汤鹏杰 , 梁斌 . 某余热锅炉低温过热器U型管爆管原因 [J]. 腐蚀与防护 , 2024 ( 03 ): 101 - 105 .
TANG P J , LIANG B . Burst Reason of Low Temperature Superheater U-Tube of a Waste Heat Boilerr [J]. Corrosion and Protection , 2024 ( 03 ): 101 - 105 .
张兆林 . SA-213TP347HFG膜式水冷壁角焊缝热裂纹原因分析 [J]. 电焊机 , 2021 ( 12 ): 50 - 55 .
ZHANG Z L . Analysis of Hot Crack in Fillet Weld of SA-213TP347HFG Membrane Water Wall [J]. Electric Welding Machine , 2021 ( 12 ): 50 - 55 .
陈明 , 王文涛 , 董鹏 , 等 . 超超临界锅炉过热器连通管焊接接头开裂原因分析与处理 [J]. 电焊机 , 2018 , 48 ( 01 ): 28 - 31 .
CHEN M , WANG W T , DONG P , et al . Analysis and Treatment of Welding Joint Cracking of Ultra Supercritical Boiler Superheater Pipe [J]. Electric Welding Machine , 2018 , 48 ( 01 ): 28 - 31 .
校林飞 , 杨占君 , 郑准备 , 等 . 火电厂锅炉水冷壁焊缝泄漏失效分析 [J]. 电焊机 , 2024 , 54 ( 04 ): 84 - 90 .
XIAO L F , YANG Z J , ZHENG Z B , et al . Failure Analysis on Weld Leakage of Boiler Water Wall in Thermal Power Plant [J]. Electric Welding Machine , 2024 , 54 ( 04 ): 84 - 90 .
黄超 . 锅炉过热器管道爆管原因分析 [J]. 现代制造技术与装备 , 2024 , 60 ( 12 ): 108 - 110 .
HUANG C . Analysis of the Cause of Boiler Superheater Pipe Explosion [J]. Modern Manufacturing Technology and Equipment , 2024 , 60 ( 12 ): 108 - 110 。
孙佳孝 , 杨可 , 郭余庆 , 等 . 膜式水冷壁表面堆焊Inconel625合金成形工艺研究 [J]. 电焊机 , 2022 , 52 ( 07 ): 93 - 99 .
SUN J X , YANG K , GUO Y Q , et al . Study on Forming Technology of Membrane Water-wall with Inconel625 Alloy Cladding [J]. Electric Welding Machine , 2022 , 52 ( 07 ): 93 - 99 .
梁秀兰 , 有移亮 , 张峥 . 12Cr1MoV锅炉过热器管长期过热开裂原因分析 [J]. 机械工程学报 , 2014 , 50 ( 08 ): 81 - 86 .
LIANG X L , YOU Y L , ZHANG Z . Long-term Overheating Cracking Analysis of 12Cr1MoV Boiler Superheater Tube [J]. Journal of Mechanical Engineering , 2014 , 50 ( 08 ): 81 - 86 .
邓化凌 , 王勇 , 宋云京 , 等 . 某一循环流化床锅炉Ⅱ级过热器管材失效分析 [J]. 中国石油大学学报(自然科学版) , 2006 ( 05 ): 84 - 87 .
DENG H L , WANG Y , SONG Y J , et al . Failure analysis for second superheater tubes in a circulating fluidized bed boiler [J]. Journal of China University of Petroleum (Natural Science Edition) , 2006 ( 05 ): 84 - 87 .
姜海峰 , 彭先宽 , 彭杏娜 , 等 . 12Cr1MoVG耐热钢堆焊技术研究 [J]. 焊接技术 , 2019 ( 10 ): 63 - 65 .
JIANG H F , PENG X K , PENG X N , et al . Study on surfacing welding process of 12Cr1MoVG heat resistant steel [J]. Welding Technology , 2019 ( 10 ): 63 - 65 .
Nachimuthu P K , Gosipathala S , Arasappan R K , et al . High temperature corrosion performance of Inconel 625 hard overlays deposited on stainless steel substrate [J]. Materials and Corrosion , 2024 , 75 ( 7 ): 875 - 890 .
徐兵 . MIG立向下堆焊Inconel 625焊接工艺研究 [J]. 压力容器 , 2019 , 36 ( 12 ): 70 - 74 .
XU B . Research on Surfacing Technology of MIG Vertical-down Surfacing Inconel 625 [J]. Pressure Vessel Technology , 2019 , 36 ( 12 ): 70 - 74 .
编辑部网址: http://www.71dhj.com http://www.71dhj.com
相关作者
相关机构
公网安备11010802024621