[1]郭 洋,董志伟,李代龙,等.大壁厚NiCrMoV钢的窄间隙焊接工艺与接头性能[J].焊管,2024,47(2):57-62.[doi:10.19291/j.cnki.1001-3938.2024.02.009]
　GUO Yang,DONG Zhiwei,et al.Narrow Gap Welding Process and Joint Performance of NiCrMoV Steel with Large Wall Thickness[J].,2024,47(2):57-62.[doi:10.19291/j.cnki.1001-3938.2024.02.009]
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大壁厚NiCrMoV钢的窄间隙焊接工艺与接头性能()
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《焊管》[ISSN:1001-3938/CN:61-1160/TE]

卷:
47
期数:
2024年第2期
页码:
57-62
栏目:
性能表征
出版日期:
2024-02-29

文章信息/Info

Title:
Narrow Gap Welding Process and Joint Performance of NiCrMoV Steel with Large Wall Thickness
文章编号:
10.19291/j.cnki.1001-3938.2024.02.009
作者:
郭 洋; 董志伟; 李代龙; 唐定狼; 张永强; 徐 健; 许德星; 张国荣
1. 西安交通大学 金属材料强度国家重点实验室，西安 710049；
2. 东方电气集团 东方汽轮机有限公司 清洁高效透平动力装备全国重点实验室，四川 德阳 618000
Author(s):
GUO Yang1;  2;  DONG Zhiwei1;  LI Dailong1;  TANG Dinglang 1;  ZHANG Yongqiang 1; XU Jian2;  XU Dexing2;  ZHANG Guorong2
1. Xi’an Jiaotong University, State Key Laboratory of Mechanical Behavior for Materials, Xi’an 710049, China；
2. DEC Dongfang Turbine Co., Ltd., State Key Laboratory of Clean and Efficient Turbomachinery Power Equipment, Deyang 618000, Sichuan, China
关键词:
大壁厚;  NiCrMoV钢;  窄间隙焊接;  显微组织;  性能
Keywords:
large wall thickness;  NiCrMoV steel;  narrow gap welding;  microstructure;  performance
分类号:
TG115
DOI:
10.19291/j.cnki.1001-3938.2024.02.009
文献标志码:
A
摘要:
针对电站设备转子用大壁厚NiCrMoV钢，分析了材料焊接性，采用窄间隙埋弧焊工艺获得了完整的焊接接头，分析了焊接接头的组织、硬度、拉伸与弯曲性能。结果表明，整个焊接接头为完全冶金结合，无裂纹、气孔等缺陷；焊缝组织为回火贝氏体+少量回火马氏体，热影响区中的粗晶区和细晶区均为回火马氏体组织和沿晶界分布的少量碳化物，母材为回火贝氏体+回火马氏体的混合组织；接头热影响区硬度最高，焊缝硬度略低于母材；焊接接头的抗拉强度随着温度的升高逐渐降低，均满足设计要求；焊接接头经过180°弯曲性能测试均未发现微裂纹，表明接头的延展性良好。
Abstract:
The weldability of the material largewall NiCrMoV steel for the rotor of power station equipment was analyzed, and the narrow gap submerged arc welding was used to obtain a integrity welded joint, and the microstructure, hardness, tensile and bending properties of the welded joint were analyzed. The results show that the whole welded joint is completely metallurgically bonded, and has no defects. The microstructure of weld metal is consisted of tempered bainite and small amount of tempered martensite,the CGHAZ and FGHAZ are the tempered martensite and a small amount of carbide distributed in grain boundaries, and the base metal is a mixed microstructure of tempered bainite + tempered martensite.The micorhardness of CGHAZ is the highest, and the hardness of the weld is slightly lower than that of the base metal. The tensile strength of the welded joint gradually decreases with the increase of temperature. No microcracks were found in the 180° bending performance test of the welded joint, indicating that the ductility of the entire welded joint was good.

参考文献/References:

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备注/Memo

备注/Memo:
收稿日期：2023-10-07
基金项目：国家重点研发计划“面向载能束增材修复与再制造的集约化合金设计与制备”（项目编号2018YFB1105803）。
作者简介：郭 洋 （1988—），男，高级工程师，博士研究生，主要从事焊接及修复再制造技术与理论研究。
更新日期/Last Update: 2024-03-06