线性菲涅尔式光热电站TP321熔盐集热管激光焊接接头组织与性能研究

赵辉; 张骏; 王伟; 张乾乾; 刘伟东; 张建伟; 张超

doi:10.3969/j.issn.1674-6457.2026.07.015

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精密成形工程 ›› 2026, Vol. 18 ›› Issue (7) : 166-174. DOI: 10.3969/j.issn.1674-6457.2026.07.015

先进连接技术

线性菲涅尔式光热电站TP321熔盐集热管激光焊接接头组织与性能研究

赵辉¹, 张骏^2,*, 王伟¹, 张乾乾², 刘伟东¹, 张建伟², 张超²

作者信息 +

Microstructure and Properties of Laser Welded Joints of TP321 Molten Salt Heat Collection Tubes in Linear Fresnel Solar Thermal Power Plants

ZHAO Hui¹, ZHANG Jun^2,*, WANG Wei¹, ZHANG Qianqian², LIU Weidong¹, ZHANG Jianwei², ZHANG Chao²

Author information +

文章历史 +

摘要

目的研究线性菲涅尔式光热电站TP321熔盐集热管激光焊接工艺以及接头组织与性能。方法采用单模激光自熔焊和激光摆动填丝焊接方法,对TP321熔盐管进行激光焊接。结果采用单模激光摆动填丝焊方法,当焊接功率为1 500 W时,可以对4 mm厚的熔盐集热管TP321进行单层单道焊接,一次成形,焊缝外观和根部形貌良好,未见咬边、裂纹、气孔、未熔合以及未焊透等缺陷。结论单模激光焊接接头拉伸试样均断于TP321母材,未在焊缝处断裂,组织中未发现M₂₃C₆等有害析出相,热影响区熔合良好、宽度较窄,焊接接头的显微硬度分布均匀。

Abstract

The work aims to investigate the laser welding process, microstructure and properties of the laser welded joint of the TP321 molten salt collection tube in the linear Fresnel solar thermal power plants. TP321 molten salt tubes were welded with single-mode laser autogenous welding and laser swing wire feeding welding method. The single-mode laser swing wire feeding welding method was adopted. When the welding power was 1 500 W, the 4 mm thick TP321 molten salt collection tube could be welded with single-layer single-pass welding for one-time forming, with good weld appearance and root morphology and without defects such as cut, crack, pore, lack of fusion and incomplete penetration. The tensile test of the single-mode laser welded joint are all broken at the TP321 base material without breaking at the weld, and no harmful phases such as M₂₃C₆ are found in the microstructure. The heat affected zone has a good fusion narrow width, and the microhardness distribution of the welded joint is uniform.

导出引用

赵辉, 张骏, 王伟, 张乾乾, 刘伟东, 张建伟, 张超. 线性菲涅尔式光热电站TP321熔盐集热管激光焊接接头组织与性能研究[J]. 精密成形工程. 2026, 18(7): 166-174 https://doi.org/10.3969/j.issn.1674-6457.2026.07.015

ZHAO Hui, ZHANG Jun, WANG Wei, ZHANG Qianqian, LIU Weidong, ZHANG Jianwei, ZHANG Chao. Microstructure and Properties of Laser Welded Joints of TP321 Molten Salt Heat Collection Tubes in Linear Fresnel Solar Thermal Power Plants[J]. Journal of Netshape Forming Engineering. 2026, 18(7): 166-174 https://doi.org/10.3969/j.issn.1674-6457.2026.07.015

中图分类号： TG456.7

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