08Cr9W3Co3VNbCuBN钢大直径厚壁管焊接工艺技术分析

IF 1.6 4区 材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY
Feng Wang, Fengshou Zhang, Jiang Ma, Xizhen Ma
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引用次数: 0

摘要

摘要本文研究了650°C超超临界电站锅炉主蒸汽管道用大直径厚壁08Cr9W3Co3VNbCuBN(G115)耐热钢管的焊接工艺,并对不同壁厚位置焊接接头的力学性能和微观组织进行了分析。结果表明,115窄间隙焊接接头的力学性能 采用钨极气体保护焊(GTAW)+金属电弧焊(SMAW)+自动埋弧焊(SAW)工艺生产的08Cr9W3Co3VNbCuBN厚大直径耐热钢管,经780°C回火后,可满足相关标准要求。焊接接头的拉伸失效发生在远离焊缝的母材区,断裂处出现明显的颈缩现象,焊接接头具有良好的拉伸性能。焊缝和热影响区未发现δ铁素体相。每个区域的微观结构为回火马氏体。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Technology and analysis of 08Cr9W3Co3VNbCuBN steel large diameter thick wall pipe welding process
Abstract In this article, the welding technology of large diameter thick wall 08Cr9W3Co3VNbCuBN (G115) heat-resistant steel pipes for the main steam pipe of a 650°C ultra-supercritical power station boiler has been investigated, and the mechanical properties and microstructure of welded joints at different wall thickness positions have also been analyzed. The results show that the mechanical properties of narrow gap welded joint of 115 mm thick large diameter 08Cr9W3Co3VNbCuBN heat-resistant steel pipe obtained by Gas tungsten arc welding (GTAW) + shielded metal arc welding (SMAW) + automatic submerged arc welding (SAW) can meet the requirements of relevant standards after tempering at 780°C. The tensile failure of the welded joint occurs in the base metal zone far away from the weld, an obvious necking phenomenon appears at the fracture position, and the welded joint has good tensile properties. No δ ferrite phase was found in the weld and heat-affected zone (HAZ). The microstructures of each zone are tempered martensite.
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来源期刊
High Temperature Materials and Processes
High Temperature Materials and Processes 工程技术-材料科学:综合
CiteScore
2.50
自引率
0.00%
发文量
42
审稿时长
3.9 months
期刊介绍: High Temperature Materials and Processes offers an international publication forum for new ideas, insights and results related to high-temperature materials and processes in science and technology. The journal publishes original research papers and short communications addressing topics at the forefront of high-temperature materials research including processing of various materials at high temperatures. Occasionally, reviews of a specific topic are included. The journal also publishes special issues featuring ongoing research programs as well as symposia of high-temperature materials and processes, and other related research activities. Emphasis is placed on the multi-disciplinary nature of high-temperature materials and processes for various materials in a variety of states. Such a nature of the journal will help readers who wish to become acquainted with related subjects by obtaining information of various aspects of high-temperature materials research. The increasing spread of information on these subjects will also help to shed light on relevant topics of high-temperature materials and processes outside of readers’ own core specialties.
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