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耐热钢P92制成的焊接修复管接头的力学性能

Mechanical Properties of Repaired Welded Pipe Joints Made of Heat-Resistant Steel P92.

作者信息

Vučetić Filip, Đorđević Branislav, Radu Dorin, Dikić Stefan, Jeremić Lazar, Milovanović Nikola, Sedmak Aleksandar

机构信息

Innovation Center of Faculty of Mechanical Engineering, Kraljice Marije 16, 11120 Belgrade, Serbia.

Faculty of Civil Engineering, Transilvania University of Brașov, Turnului Street 5, 500152 Brașov, Romania.

出版信息

Materials (Basel). 2025 Jun 19;18(12):2908. doi: 10.3390/ma18122908.

DOI:10.3390/ma18122908
PMID:40573035
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC12195099/
Abstract

This research provides a detailed investigation into the mechanical properties and microstructural evolution of heat-resistant steel P92 subjected to both initial (i) welding procedures and simulated (ii) repair welding. The study addresses the influence of critical welding parameters, including preheating temperature, heat input, and post-weld heat treatment (PWHT), with a particular emphasis on the metallurgical consequences arising from the application of repair welding thermal cycles. Through the analysis of three welding probes-initially welded pipes using the PF (vertical upwards) and PC (horizontal-vertical) welding positions, and a PF-welded pipe undergoing a simulated repair welding (also in the PF position)-the research compares microstructure in the parent material (PM), weld metal (WM), and heat-affected zone (HAZ). Recognizing the practical limitations and challenges associated with achieving complete removal of the original WM under the limited (in-field) repair welding, this study provides a comprehensive comparative analysis of uniaxial tensile properties, impact toughness evaluated via Charpy V-notch testing, and microhardness measurements conducted at room temperature. Furthermore, the research critically analyzes the influence of the complex thermal cycles experienced during both the initial welding and repair welding procedures to elucidate the practical application limits of this high-alloyed, heat-resistant P92 steel in demanding service conditions.

摘要

本研究对耐热钢P92在初始（i）焊接工艺和模拟（ii）补焊过程中的力学性能和微观结构演变进行了详细调查。该研究探讨了关键焊接参数的影响，包括预热温度、热输入和焊后热处理（PWHT），特别强调了补焊热循环应用所产生的冶金后果。通过对三个焊接试件的分析——最初使用PF（向上立焊）和PC（横向-垂直）焊接位置焊接的管道，以及一个经历模拟补焊（同样在PF位置）的PF焊接管道——该研究比较了母材（PM）、焊缝金属（WM）和热影响区（HAZ）的微观结构。鉴于在有限的（现场）补焊条件下完全去除原始焊缝金属存在实际限制和挑战，本研究对单轴拉伸性能、通过夏比V型缺口试验评估的冲击韧性以及在室温下进行的显微硬度测量进行了全面的对比分析。此外，该研究还批判性地分析了初始焊接和补焊过程中经历的复杂热循环的影响，以阐明这种高合金耐热P92钢在苛刻服役条件下的实际应用限制。

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本文引用的文献

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Materials (Basel). 2025 Jan 5;18(1):194. doi: 10.3390/ma18010194.
2
Study on Mechanical and Microstructural Evolution of P92 Pipes During Long-Time Operation.P92管道长期运行过程中的力学与微观结构演变研究
Materials (Basel). 2024 Oct 18;17(20):5092. doi: 10.3390/ma17205092.
3
Structural integrity assessment of Inconel 617/P92 steel dissimilar welds for different groove geometry.Inconel 617/P92 钢不同坡口几何形状的异种焊缝的结构完整性评估。
Sci Rep. 2023 May 17;13(1):8061. doi: 10.1038/s41598-023-35136-1.
4
Manufacture and Performance of Welds in Creep Strength Enhanced Ferritic Steels.蠕变强度增强铁素体钢焊缝的制造与性能
Materials (Basel). 2019 Jul 13;12(14):2257. doi: 10.3390/ma12142257.