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先进超超临界机组用Inconel 617合金焊接研究进展

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先进超超临界机组用Inconel 617合金焊接研究进展

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Research progress on welding of Inconel 617 alloy for advanced ultra-supercritical power plants

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doi: 10.19666/j.rlfd.202607017

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【背景】Inconel 617合金兼具优异的高温强度、耐腐蚀性与抗氧化性，在核能压力容器、工业燃气轮机及A-USC燃煤蒸汽机组等领域具有广阔的应用前景。焊接材料与工艺参数是制约其广泛应用的关键技术瓶颈之一。

【目的】本文系统阐述了Inconel 617的焊接特性，综述了其主要焊接方法、焊材及焊后热处理的研究进展，为深入研究与工程应用提供参考。

【分析】Inconel 617热裂纹敏感性较高，热输入与冷却速率等工艺参数影响较大。在电弧焊方法中，TIG焊接头力学性能最佳，多脉冲TIG焊与窄间隙TIG焊进一步拓展了不同板厚的适用性；MIG焊因热输入偏大，接头性能略差于TIG焊，但冷金属过渡焊性能优良；SMAW接头夹杂物较多，冲击韧性在电弧焊中最低。相比之下，激光焊与激光-电弧复合焊热输入低，接头整体性能优于TIG焊；扩散焊因氧化物与碳化物夹杂问题尚未解决，接头脆性最高。焊材方面，Inconel 617焊丝发展已较为成熟，而焊条及扩散焊中间层的氧化物夹杂问题仍待突破。焊后热处理上，通常认为Inconel 617接头无需热处理，必要时可采用稳定化处理或全固溶处理。

【结论】综合来看，窄间隙TIG焊、冷金属过渡焊与激光-电弧复合焊接头性能均衡优异，是Inconel 617最具应用潜力的焊接工艺。

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[Background] Inconel 617 alloy exhibits a superior combination of high-temperature strength, corrosion resistance, and oxidation resistance, showing broad application prospects in nuclear pressure vessels, industrial gas turbines, and A-USC coal-fired steam units. The lack of systematic development of welding consumables with excellent applicability, combined with ill-defined processing windows for various welding methods, constitutes one of the critical technical bottlenecks restricting its widespread industrial application.

[Objective] This paper systematically addresses the weldability characteristics of Inconel 617, reviewing the research progress on its primary welding processes, welding consumables, and PWHT, with the aim of providing reference for future in-depth research and engineering applications.

[Analysis] Due to its high alloying element content, Inconel 617 tends to form a high volume fraction of liquid films during the welding thermal cycle, rendering it highly susceptible to solidification cracking and liquation cracking. Consequently, processing parameters such as welding heat input and cooling rate exert a profound influence on the mechanical properties of the joints. Among arc welding processes, TIG welding produces joint properties superior to other arc processes owing to its low heat input and effective metallurgical shielding; furthermore, multi-pulse NG-TIG welding have expanded its applicability across varying plate thicknesses. MIG welding provides high efficiency and degree of automation, but its joint performance is slightly inferior to TIG due to higher heat input—though CMT welding achieves excellent joint quality. SMAW suffers the most severe loss in impact toughness among arc processes, as insufficient metallurgical shielding by the electrode flux coating leads to high inclusion densities in the weld metal. Compared to conventional arc welding, LBW and LHW offer higher power densities and superior heat input control, generally yielding superior overall joint performance relative to TIG. In diffusion bonding, the core issue of oxide and carbide inclusions remains unresolved, resulting in poor metallurgical bonding and severe degradation of ductility and toughness. Regarding welding consumables, solid wires for Inconel 617 have reached industrial maturity, whereas flux-coated electrodes and diffusion bonding interlayers still require compositional optimization to mitigate oxide inclusion formation during processing. Regarding PWHT, Inconel 617 exhibits an excellent solid-solution strengthening response; thus, its welded joints are generally considered suitable for service in the as-welded condition, though stabilization treatment or full solution annealing may be applied when necessary.

[Conclusion] Taken together, heat input and metallurgical shielding performance represent the central issues influencing the properties of Inconel 617 joints. NG-TIG welding, CMT welding, and laser-arc hybrid welding yield superior joint performance, serving as the most promising joining processes for Inconel 617 applications.

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. 先进超超临界机组用Inconel 617合金焊接研究进展. 热力发电, : - . DOI: 10.19666/j.rlfd.202607017

. Research progress on welding of Inconel 617 alloy for advanced ultra-supercritical power plants[J]. Thermal Power Generation, : - . DOI: 10.19666/j.rlfd.202607017

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doi: 10.19666/j.rlfd.202607017

首发时间：2026-10-16

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2种不同金属材料的力学参数

科 Family	属数 Number of genus	种数 Number of species	占总种数比例 Percentage of total species (%)	属 Genus	种数 Number of species	占总种数比例 Percentage of total species (%)
鹅膏菌科Amanitaceae	2	11	5.26	鹅膏菌属 Amanita	10	4.78
小菇科 Mycenaceae	2	12	5.74	丝盖伞属 Inocybe	5	2.39
多孔菌科 Polyporaceae	8	14	6.70	蜡蘑属 Laccaria	5	2.39
红菇科 Russulaceae	3	23	11.00	小皮伞属 Marasmius	6	2.87
				小菇属 Mycena	11	5.26
				光柄菇属 Pluteus	5	2.39
				红菇属 Russula	17	8.13
				栓菌属 Trametes	5	2.39

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