铬钼钢焊接材料焊接工艺及性能研究
Research on Welding Technology Development and Application of Chrome-Molybdenum Steel Welding Material
- 2025年55卷第12期 页码:85-90
收稿:2025-01-16,
修回:2025-02-21,
纸质出版:2025-12-20
DOI: 10.7512/j.issn.1001-2303.2025.12.12
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收稿:2025-01-16,
修回:2025-02-21,
纸质出版:2025-12-20
移动端阅览
针对第四代核电堆型蒸汽发生器用SA-336 F22 CL3及SA-213M T22铬钼钢的焊接制造需求,系统研究了E9018-B3焊条、ER90S-B3焊丝及F9P2-EB3-B3/FLUX埋弧焊材三种匹配焊接材料的焊接工艺及接头性能。通过优化焊接操作技巧与工艺参数,并制定严格的预热(200~250 ℃)、后热(250~400 ℃保温2 h)及消应力热处理制度(690 ℃±15 ℃保温24~24.5 h),制备了焊接接头。测试结果表明,接头短时力学性能优异:熔敷金属在530 ℃高温抗拉强度保持良好,-20 ℃下ER90S-B3熔敷金属冲击功≥200 J,热处理后焊缝区硬度显著下降且分布均匀。530 ℃高温持久试验表明,焊接接头断裂寿命超过10 000 h,其应力-断裂时间关系曲线显著高于ASME标准曲线。研究证实,采用优化的焊接及热处理工艺,可获得成形良好、兼具优异短时力学性能与长期高温持久性能的铬钼钢焊接接头。该成果已成功应用于某四代核电蒸汽发生器制造,累计完成主要焊缝1 120条,无损检测一次合格率100%,为同类设备焊接制造提供了关键技术与实践依据。
To meet the welding manufacturing requirements of SA-336 F22 CL3 and SA-213M T22 chrome-molybdenum steels for the fourth-generation nuclear reactor steam generators
a systematic study was conducted on the welding technology and joint performance of three matching welding materials: E9018-B3 electrode
ER90S-B3 wire
and F9P2-EB3-B3/FLUX submerged arc welding material. By optimizing welding operation techniques and process parameters and implementing strict preheating (200-250 ℃)
post-heating (250-400 ℃ for 2 h)
and stress relief heat treatment (690 ℃±15 ℃ for 24~24.5 h)
welded joints were prepared. Test results show excellent short-term mechanical properties: the deposited metal maintains good high-temperature tensile strength at 530 ℃
the impact energy of ER90S-B3 deposited metal at -20 ℃ is ≥200 J
and the hardness in the weld zone decreases significantly and distributes uniformly after heat treatment. High-temperature durability tests at 530 ℃ indicate that the fracture life of the welded joints exceeds 10
000 h
and their stress-time-to-fracture curves are significantly higher than the ASME standard curve. The research confirms that using optimized welding and heat treatment processes can achieve chrome-molybdenum steel welded joints with good formation
excellent short-term mechanical properties
and long-term high-temperature durability. This achievement has been successfully applied to the manufacture of a fourth-generation nuclear steam generator
with a total of 1
120 main welds completed and a 100% first-pass nondestructive testing qualification rate
providing key technical and practical basis for the welding manufacturing of similar equipment.
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